Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☒

~~Indicate the number of shares outstanding of each~~Securities registered pursuant to Section 12(b) of the ~~issuer's classes of common stock, as of the latest practicable date.~~

	September 30, 2018			December 31, 2017 As Adjusted (Note 1)			June 30, 2019			December 31, 2018
Assets	(in thousands, except share and per share data)						(in thousands, except share and per share data)
Current Assets:
Cash and cash equivalents	$	529		$	4,720		$	503		$	2,194
Accounts receivable, net		197,973			170,278			227,046			181,612
Prepaid expenses and other		26,155			28,251			33,840			29,567
Total current assets		224,657			203,249			261,389			213,373
Property and Equipment, at cost		1,445,049			1,289,994			1,665,557			1,521,341
Less-accumulated depreciation		609,324			554,214			674,220			628,283
Net property and equipment		835,725			735,780			991,337			893,058
Operating Lease Right-of-Use Assets								71,765			—
Goodwill and Identifiable Intangibles, net		23,005			24,027			22,066			22,664
Other Noncurrent Assets		4,705			4,259			5,563			4,648
Total assets	$	1,088,092		$	967,315		$	1,352,120		$	1,133,743
Liabilities and Stockholders’ Equity
Current Liabilities:
Accounts payable	$	62,025		$	57,438		$	77,521		$	78,994
Wages, vacation and employees’ benefits		53,175			39,748			47,095			48,116
Claims and insurance accruals		39,846			35,850			47,255			40,980
Other current liabilities		37,083			19,807			29,439			23,138
Current portion of long-term debt		17,622			14,083			18,959			18,082
Current portion of operating lease liability								16,921			—
Total current liabilities		209,751			166,926			237,190			209,310
Other Liabilities:
Long-term debt, less current portion		103,715			118,833			160,920			104,777
Operating lease liability, less current portion								55,960			—
Deferred income taxes		65,895			59,423			100,244			86,893
Claims, insurance and other		39,440			39,639			40,304			36,899
Total other liabilities		209,050			217,895			357,428			228,569
Commitments and Contingencies
Stockholders’ Equity:
Preferred stock, $0.001 par value, 50,000 shares authorized, none issued and outstanding		—			—			—			—
Common stock, $0.001 par value, 50,000,000 shares authorized, 25,693,651 and 25,551,617 shares issued and outstanding at September 30, 2018 and December 31, 2017, respectively		26			26
Common stock, $0.001 par value, 50,000,000 shares authorized, 25,905,664 and 25,693,651 shares issued and outstanding at June 30, 2019 and December 31, 2018, respectively								26			26
Additional paid-in-capital		253,366			246,454			257,583			254,738
Deferred compensation trust, 140,882 and 170,310 shares of common stock at cost at September 30, 2018 and December 31, 2017, respectively		(3,202	)		(3,486	)
Deferred compensation trust, 148,066 and 143,614 shares of common stock at cost at June 30, 2019 and December 31, 2018, respectively								(3,920	)		(3,381	)
Retained earnings		419,101			339,500			503,813			444,481
Total stockholders’ equity		669,291			582,494			757,502			695,864
Total liabilities and stockholders’ equity	$	1,088,092		$	967,315		$	1,352,120		$	1,133,743

For the quarters and ~~nine~~six months ended ~~September~~June 30, ~~2018~~2019 and ~~2017~~2018

	Third Quarter						Nine Months						Second Quarter						Six Months
	2018			2017 As Adjusted (Note 1)			2018			2017 As Adjusted (Note 1)			2019			2018			2019			2018
	(in thousands, except per share data)												(in thousands, except per share data)
Operating Revenue	$	425,562		$	357,010		$	1,247,099		$	1,044,505		$	464,195		$	428,732		$	874,779		$	821,537
Operating Expenses:
Salaries, wages and employees’ benefits		224,635			194,920			656,165			572,211			237,689			220,406			458,041			431,530
Purchased transportation		31,216			30,056			95,245			79,516			34,154			34,113			62,572			64,029
Fuel, operating expenses and supplies		81,643			66,679			245,182			196,761			85,328			84,745			168,871			163,539
Operating taxes and licenses		12,366			10,631			37,310			32,088			13,529			12,794			26,731			24,944
Claims and insurance		9,985			8,535			30,086			28,010			13,156			9,910			22,686			20,101
Depreciation and amortization		26,694			22,338			74,965			64,607			29,143			25,241			55,925			48,271
Loss (gain) from property disposals, net		326			(717	)		305			(469	)		30			(42	)		156			(21	)
Total operating expenses		386,865			332,442			1,139,258			972,724			413,029			387,167			794,982			752,393
Operating Income		38,697			24,568			107,841			71,781			51,166			41,565			79,797			69,144
Nonoperating Expenses (Income):
Interest expense		1,410			1,313			4,090			3,762			1,903			1,454			3,286			2,680
Other, net		(139	)		(131	)		(384	)		57			(140	)		(142	)		(474	)		(245	)
Nonoperating expenses, net		1,271			1,182			3,706			3,819			1,763			1,312			2,812			2,435
Income Before Income Taxes		37,426			23,386			104,135			67,962			49,403			40,253			76,985			66,709
Income Tax Provision		9,231			9,013			24,534			24,623			12,330			9,972			17,653			15,303
Net Income	$	28,195		$	14,373		$	79,601		$	43,339		$	37,073		$	30,281		$	59,332		$	51,406

Weighted average common shares outstanding – basic		25,792			25,527			25,752			25,494			25,958			25,766			25,915			25,732
Weighted average common shares outstanding – diluted		26,354			26,113			26,328			26,050			26,406			26,354			26,373			26,326

Basic Earnings Per Share	$	1.09		$	0.56		$	3.09		$	1.70		$	1.43		$	1.18		$	2.29		$	2.00
Diluted Earnings Per Share	$	1.07		$	0.55		$	3.02		$	1.67		$	1.40		$	1.15		$	2.25		$	1.95

	Common Shares		Common Stock		Additional Paid-in Capital			Deferred Compensation Trust			Retained Earnings		Total
BALANCE at December 31, 2018		25,693,651	$	26	$	254,738		$	(3,381	)	$	444,481	$	695,864
Stock compensation, including options and long-term incentives		—		—		998			—			—		998
Director deferred share activity		45,075		—		—			—			—		—
Exercise of stock options less shares withheld for taxes		68,169		—		1,798			—			—		1,798
Shares issued for long-term incentive awards, net of shares withheld for taxes		83,281		—		(3,268	)		—			—		(3,268	)
Purchase of shares by Deferred Compensation Trust		—		—		309			(458	)		—		(149	)
Sale of shares by Deferred Compensation Trust		—		—		—			148			—		148
Net income		—		—		—			—			22,259		22,259

BALANCE at March 31, 2019		25,890,176		26		254,575			(3,691	)		466,740		717,650
Stock compensation, including options and long-term incentives		—		—		1,342			—			—		1,342
Director deferred share activity		4,155		—		1,117			—			—		1,117
Exercise of stock options less shares withheld for taxes		10,832		—		356			—			—		356
Shares issued for long-term incentive awards, net of shares withheld for taxes		501		—		(36	)		—			—		(36	)
Purchase of shares by Deferred Compensation Trust		—		—		229			(229	)		—		—
Sale of shares by Deferred Compensation Trust		—		—		—			—			—		—
Net income		—		—		—			—			37,073		37,073
BALANCE at June 30, 2019		25,905,664	$	26	$	257,583		$	(3,920	)	$	503,813	$	757,502

	Common Shares		Common Stock		Additional Paid-in Capital			Deferred Compensation Trust			Retained Earnings		Total
BALANCE at December 31, 2017		25,551,617	$	26	$	246,454		$	(3,486	)	$	339,500	$	582,494
Stock compensation, including options and long-term incentives		—		—		1,058			—			—		1,058
Director deferred share activity		—		—		—			—			—		—
Exercise of stock options less shares withheld for taxes		97,370		—		4,018			—			—		4,018
Shares issued for long-term incentive awards, net of shares withheld for taxes		31,428		—		(1,302	)		—			—		(1,302	)
Purchase of shares by Deferred Compensation Trust		—		—		5			(295	)		—		(290	)
Sale of shares by Deferred Compensation Trust		—		—		—			291			—		291
Net income		—		—		—			—			21,125		21,125

BALANCE at March 31, 2018		25,680,415		26		250,233			(3,490	)		360,625		607,394
Stock compensation, including options and long-term incentives		—		—		1,061			—			—		1,061
Director deferred share activity		5,184		—		1,109			—			—		1,109
Exercise of stock options less shares withheld for taxes		6,333		—		147			—			—		147
Shares issued for long-term incentive awards, net of shares withheld for taxes		635		—		(18	)		—			—		(18	)
Purchase of shares by Deferred Compensation Trust		—		—		4			(156	)		—		(152	)
Sale of shares by Deferred Compensation Trust		—		—		—			152			—		152
Net income		—		—		—			—			30,281		30,281
BALANCE at June 30, 2018		25,692,567	$	26	$	252,536		$	(3,494	)	$	390,906	$	639,974

For the ~~nine~~six months ended ~~September~~June 30, ~~2018~~2019 and ~~2017~~2018

	Nine Months						Six Months
	2018			2017 As Adjusted (Note 1)			2019			2018
	(in thousands)						(in thousands)
Operating Activities:
Net income	$	79,601		$	43,339		$	59,332		$	51,406
Noncash items included in net income:
Depreciation and amortization		74,965			64,607			55,925			48,271
Other, net		14,826			18,812			17,403			9,395
Changes in operating assets and liabilities, net		17,718			979			(19,086	)		3,046
Net cash provided by operating activities		187,110			127,737			113,574			112,118
Investing Activities:
Acquisition of property and equipment		(155,217	)		(155,676	)		(166,434	)		(118,573	)
Proceeds from disposal of property and equipment		778			3,090			380			418
Net cash used in investing activities		(154,439	)		(152,586	)		(166,054	)		(118,155	)
Financing Activities:
Repayment of revolving credit agreement		(170,733	)		(159,102	)		(100,517	)		(92,475	)
Borrowing of revolving credit agreement		142,733			193,601			161,515			99,475
Proceeds from stock option exercises		4,165			2,531			2,154			4,165
Shares withheld for taxes		(1,396	)		(1,249	)		(3,304	)		(1,321	)
Repayment of senior notes		—			(3,571	)
Repayment of capital leases		(11,631	)		(8,819	)
Net cash provided by (used in) financing activities		(36,862	)		23,391
Debt issuance costs								(23	)		—
Repayment of finance leases								(9,036	)		(7,338	)
Net cash provided by financing activities								50,789			2,506
Net Decrease in Cash and Cash Equivalents		(4,191	)		(1,458	)		(1,691	)		(3,531	)
Cash and cash equivalents, beginning of period		4,720			1,539			2,194			4,720
Cash and cash equivalents, end of period	$	529		$	81		$	503		$	1,189

Non Cash Investing Activities
Equipment financed with capital leases	$	28,052		$	31,320
Equipment financed with finance leases							$	5,058		$	22,422

The accompanying unaudited condensed consolidated financial statements include the accounts of Saia, Inc. and its wholly-owned subsidiaries (together, the Company or Saia). All significant intercompany accounts and transactions have been eliminated in the condensed consolidated financial statements.

The condensed consolidated financial statements have been prepared by the Company without audit by the independent registered public accounting firm. In the opinion of management, all normal recurring adjustments necessary for a fair presentation of the condensed consolidated balance sheets, statements of operations, stockholders’ equity and cash flows for the interim periods included herein have been made. These interim condensed consolidated financial statements of the Company have been prepared in accordance with U.S. generally accepted accounting principles for interim financial information, the instructions to Quarterly Report on Form 10-Q and Rule 10-01 of Regulation S-X. Certain information and note disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles have been condensed or omitted from these statements. The accompanying condensed consolidated financial statements should be read in conjunction with the Company’s Annual Report on Form 10-K for the year ended December 31, ~~2017.~~2018. Operating results for the quarter and ~~nine~~six months ended ~~September~~June 30, ~~2018~~2019 are not necessarily indicative of the results of operations that may be expected for the year ended December 31, ~~2018.~~2019.

The Company provides regional and interregional less-than-truckload (LTL) services ~~across 40 states~~ through a single integrated organization. ~~For the quarter and nine months ended September 30, 2018, 97.6%~~While more than 97% of its revenue ~~was~~has been derived from transporting LTL ~~shipments. For~~shipments across 42 states, the ~~quarter and nine months ended September 30, 2017, 97.2% and 97.3% of revenue, respectively, was derived from transporting LTL shipments. The~~ Company also offers customers a wide range of other value-added services, including non-asset truckload, expedited and logistics services ~~throughout~~across North America. The Company’s customer base is diversified across numerous industries.

The Company’s revenues are derived primarily from the transportation of freight as it satisfies performance obligations that arise from contracts with its customers, when collectability is considered probable. The Company’s performance obligations arise when it receives a bill of lading (“BOL”) to transport a customer's commodities at negotiated prices contained in either a transportation services agreement or a publicly disclosed tariff rate. Once a BOL is received, a legally-enforceable contract is formed whereby the parties are committed to perform and the rights of the parties, shipping terms and conditions, and payment terms have been identified. A customer may submit many BOLs for transportation services at various times throughout a service agreement term but each shipment represents a distinct service that is a separately identified performance obligation.

The ~~average~~ transit time to complete a shipment is typically between 1 to 5 days. Payments for transportation services are normally billed after completion of the service and are generally due within 30 days after the invoice date. The Company recognizes revenue related to the Company’s LTL, non-asset truckload and expedited services over the transit time of the shipment as it moves from origin to destination. Revenue for services started but not completed at the reporting date is allocated based on the relative transit time in each reporting period, with the portion allocated for services subsequent to the reporting date considered remaining performance obligations.

Key estimates included in the recognition and measurement of revenue and related accounts receivable are as follows:

Revenue related to interline transportation services that involve the services of another party, such as another LTL service provider, is reported on a net basis. The portion of the gross amount billed to customers that is remitted by the Company to another party is not reflected as revenue. Revenue from logistics services is recognized as the services are provided.

Remaining performance obligations represent the transaction price allocated to future reporting periods for freight services started but not completed at the reporting date. This includes the unearned portion of billed and unbilled amounts for cancellable freight shipments in transit that the Company expects to recognize as revenue in the period subsequent to the reporting date, which is on average less than one week. The Company has elected to apply the optional exemption in accordance with the Financial Accounting

Standards Board (FASB) Accounting Standards Codification (ASC) 606 as it pertains to additional quantitative disclosures pertaining to remaining performance obligations.

Claims and insurance accruals, both current and long-term, reflect the estimated cost of claims for workers’ compensation (discounted to present value), cargo loss and damage, and bodily injury and property damage not covered by insurance. These costs are included in claims and insurance expense, except for workers’ compensation, which is included in employees’ benefits expense. The liabilities are included in claims and insurance reserves based on estimates of claims incurred. Liabilities for unsettled claims and claims incurred but not yet reported are actuarially determined with respect to workers’ compensation claims and with respect to all other liabilities, estimated based on management’s evaluation of the nature and severity of individual claims and past experience.

Effective March 1, 2018, the Company entered into a new auto liability policy with a three-year term. The risk retention amount per occurrence remains at $2.0 million under the new policy. The policy includes a limit for a single loss of $8.0 million, an aggregate loss limit of $24.0 million for each policy year, and a $48.0 million aggregate loss limit for the 36 month term ended March 1, 2021. The policy includes a returnable premium of up to $5.2 million, to be adjusted by the insurer for changes in claims, and a provision to extend the term of the policy for one additional 12 month period, if management and the insurer mutually agree to commute the policy for the first 12 months of the policy term. A decision with respect to commutation of the first 12 months of the policy cannot be made before March 1, 2019. The policy also includes a returnable premium of up to $15.6 million, to be adjusted by the insurer for changes in claims, if management and the insurer mutually agree to commute the policy for the entire 36 months. A decision with respect to commutation of the entire policy cannot be made before August 30, 2021, unless both the Company and the insurance carrier agree to a commutation prior to the end of the policy term. Additionally, the Company may be required to pay an additional premium of up to $11.0 million if paid losses are greater than $15.6 million over the three year policy period. No such additional premium was accrued at September 30, 2018. Management cannot predict whether or not future claims or the development of existing claims will justify a commutation, and accordingly, no related amounts were recorded at September 30, 2018.

~~In May 2014, the FASB issued Accounting Standards Update (ASU) No. 2014-09,~~ ~~Revenue from Contracts with Customers~~, which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services. The ASU replaced most existing revenue recognition guidance in U.S. generally accepted accounting principles when it became effective for the Company on January 1, 2018. In-depth reviews of contracts were completed and changes to processes and internal controls to meet the standard’s reporting and disclosure requirements were implemented. The Company adopted the standard using the full retrospective transition method.

As a result of the adoption of this standard, the Company changed the presentation of its non-asset truckload business from net revenue to gross revenue and changed the method of recognizing that revenue from upon commencement of the services to over the transit time of the freight as it moves from origin to destination.

The Company has consistently applied the accounting policies to all periods presented in these condensed consolidated financial statements. The below tables reflect the effect of the adoption of this standard on the previously reported financial data.

For the quarter ended September 30, 2017

For the nine months ended September 30, 2017

As adjusted

As originally reported

Effect of change

As adjusted

As originally reported

Effect of change

(in thousands, except per share data)
Operating revenue

$
357,010

$
350,062

$
6,948

$
1,044,505

$
1,025,259

$
19,246

Purchased transportation

30,056

23,074

6,982

79,516

60,212

19,304

Total operating expenses

332,442

325,460

6,982

972,724

953,420

19,304

Operating income

24,568

24,602

(34
)

71,781

71,839

(58
)

Net income

14,373

14,407

(34
)

43,339

43,397

(58
)

Basic Earnings Per Share

0.56

0.56

—

1.70

1.70

—

Diluted Earnings Per Share

0.55

0.55

—

1.67

1.67

—

In February 2016, the FASB established Topic 842, Leases, by issuing ~~Accounting Standards Update (ASU)~~ASU No. 2016-02, which requires lessees to recognize leases on the balance sheet and disclose key information about leasing arrangements. Topic 842 was subsequently amended by ASU No. 2018-01, Land Easement Practical Expedient for Transition to Topic 842; ASU No. 2018-10, Codification Improvements to Topic 842, Leases; and ASU No. 2018-11, Targeted Improvements. The new standard establishes a right-of-use (ROU) model ~~(ROU)~~ that requires a lessee to recognize a ROU asset and lease liability on the balance sheet for all leases with a term longer than 12 months. Leases ~~will be~~are classified as finance or operating, with classification affecting the pattern and classification of expense recognition in the income statement.

The new standard isbecame effective for the Company on January 1, ~~2019, with early adoption permitted. The Company expects to adopt the new standard on its effective date.~~2019. A modified retrospective transition approach is required, applying the new standard to all leases existing at the date of initial application. An entity may choose to use either (1) its effective date or (2) the beginning of the earliest comparative period presented in the financial statements as its date of initial application. ~~If an entity chooses the second option, the transition requirements for existing leases also apply to leases entered into between the date of initial application and the effective date.~~ The ~~entity must also recast its comparative period financial statements and provide the disclosures required by~~Company adopted the new standard ~~for the comparative periods. The Company expects to adopt the new standard on January 1, 2019 and use~~using the effective date as its date

of initial application. Consequently, financial information ~~will~~has not bebeen updated and the disclosures required under the new standard ~~will~~are not be provided for dates and periods before January 1, 2019.

The new standard ~~provides~~provided a number of optional practical expedients in transition. The Company ~~expects to elect~~elected the ‘package of practical expedients’, which permits it not to reassess under the new standard its prior conclusions about lease identification, lease classification and initial direct costs. The Company ~~does~~did not ~~expect to~~ elect the use-of-hindsight or the practical expedient pertaining to land easements; the latter not being applicable to it.

The Company expects that this standard will have a material effect on its financial statements. While the Company continues to assess all of the effects of adoption, it currently believes the most significant effects relate to (1) the recognition of new ROU assets and lease liabilities on its balance sheet for its real estate operating leases and (2) providing significant new disclosures about its leasing activities. The Company does not expect a significant change in its leasing activities between now and adoption.

~~The new standard also provides practical expedients for an entity’s ongoing accounting. The Company currently expects to elect~~elected the short-term lease recognition exemption for all leases that qualify. This means, for those leases that qualify, the Company will not recognize ROU assets or lease liabilities, and this includes not recognizing ROU assets or lease liabilities for existing short-term leases of those assets in transition. ~~The~~

As of January 1, 2019, the Company ~~also currently expects to elect~~recognized additional net lease assets and operating liabilities of approximately $77 million, with corresponding ROU assets of the ~~practical expedient to not separate lease and non-lease components~~same amount based on the present value of the remaining minimum rental payments for existing operating leases. Additionally, per the requirements of the new standard for measurement of the ROU, approximately $3 million of deferred rent liability was reclassified as a contra account against the ROU asset. Substantially all of ~~its leases~~the balance came from the Claims, insurance and other ~~than leases~~section of ~~real estate.~~

The calculation of basic earnings per common share and diluted earnings per common share was as follows (in thousands, except per share amounts):

	Third Quarter				Nine Months				Second Quarter				Six Months
	2018		2017 As Adjusted (Note 1)		2018		2017 As Adjusted (Note 1)		2019		2018		2019		2018
Numerator:
Net income	$	28,195	$	14,373	$	79,601	$	43,339	$	37,073	$	30,281	$	59,332	$	51,406
Denominator:
Denominator for basic earnings per share–weighted average common shares		25,792		25,527		25,752		25,494		25,958		25,766		25,915		25,732
Effect of dilutive stock options		167		152		168		124		107		167		116		170
Effect of other common stock equivalents		395		434		408		432		341		421		342		424
Denominator for diluted earnings per share–adjusted weighted average common shares		26,354		26,113		26,328		26,050		26,406		26,354		26,373		26,326

Basic Earnings Per Share	$	1.09	$	0.56	$	3.09	$	1.70	$	1.43	$	1.18	$	2.29	$	2.00

Diluted Earnings Per Share	$	1.07	$	0.55	$	3.02	$	1.67	$	1.40	$	1.15	$	2.25	$	1.95

For the quarter and ~~nine~~six months ended ~~September~~June 30, ~~2018,~~2019, options and restricted stock for ~~45,150~~113,251 shares of common stock were excluded from the calculation of diluted earnings per share because their effect was anti-dilutive. For the quarter and ~~nine~~six months ended ~~September~~June 30, ~~2017,~~2018, options and restricted stock for ~~63,104~~45,150 and 61,233 shares of common stock, respectively, were excluded from the calculation of diluted earnings per share because their effect was anti-dilutive.

The Company pays its pro rata share of the cost of letters of credit outstanding for certain workers’ compensation claims incurred prior to March 1, 2000 that Saia’s former parent maintains for insurance programs. The Company’s pro rata share of these outstanding letters of credit was $1.8 million at ~~September~~June 30, ~~2018.~~2019.

The Company is subject to legal proceedings that arise in the ordinary course of its business. Management believes that adequate provisions for the resolution of all contingencies, claims and pending litigation have been made for probable and estimable losses and that the ultimate outcome of these actions will not have a material adverse effect on its financial condition but could have a material adverse effect on the results of operations in a given quarter or annual period.

The carrying amounts of financial instruments including cash and cash equivalents, accounts receivable, accounts payable and short-term debt approximated fair value as of ~~September~~June 30, ~~2018~~2019 and December 31, ~~2017,~~2018, because of the relatively short maturity of these instruments. Based on the borrowing rates currently available to the Company for debt with similar terms and remaining maturities, the estimated fair value of total debt at ~~September~~June 30, ~~2018~~2019 and December 31, ~~2017~~2018 was ~~$120.3~~$179.7 million and ~~$132.3~~$122.0 million, respectively, based upon levels one and two in the fair value hierarchy. The carrying value of the debt was ~~$121.3~~$179.9 million and ~~$132.9~~$122.9 million at ~~September~~June 30, ~~2018~~2019 and December 31, ~~2017,~~2018, respectively.

At ~~September~~June 30, ~~2018~~2019 and December 31, ~~2017,~~2018, debt consisted of the following (in thousands):

	September 30, 2018		December 31, 2017		June 30, 2019		December 31, 2018
Credit Agreement with Banks, described below	$	15,000	$	43,000	$	80,998	$	20,000
Capital Leases, described below		106,337		89,916
Finance Leases, described below						98,881		102,859
Total debt		121,337		132,916		179,879		122,859
Less: current portion of long-term debt		17,622		14,083		18,959		18,082
Long-term debt, less current portion	$	103,715	$	118,833	$	160,920	$	104,777

The Company’s liquidity needs arise primarily from capital investment in new equipment, land and structures, information technology and letters of credit required under insurance programs, as well as funding working capital requirements.

The Company is party to a revolving credit agreement with a group of banks to fund capital investments, letters of credit and working capital needs.

The Fifth Amended and Restated Credit Agreement dated March 6, 2015 (the Restated Credit Agreement) iswas a revolving credit facility for up to $250 million expiring in March 2020. The Restated Credit Agreement also ~~has~~had an accordion feature that ~~allows~~allowed for an additional $75 million availability, subject to lender approval. The Restated Credit Agreement ~~provides~~provided for a LIBOR rate margin range from 112.5 basis points to 225 basis points, base rate margins from minus 12.5 basis points to plus 50 basis points, an unused portion fee from 20 basis points to 30 basis points and letter of credit fees from 112.5 basis points to 225 basis points, in each case based on the Company’s leverage ratio.

Under the Restated Credit Agreement, the Company ~~must~~was required to maintain certain financial covenants including a minimum fixed charge coverage ratio and a maximum leverage ratio, among others. The Restated Credit Agreement also ~~provides~~provided for a pledge by the Company of certain land and structures, certain tractors, trailers and other personal property and accounts receivable, to secure indebtedness under the Restated Credit Agreement.

additional $100 million availability, subject to bank approval. The amendment reduced the interest rate pricing grid compared to the Restated Credit Agreement. The Amended Credit Agreement provides for aLIBOR rate margin range from 100 basis points to 200 basis points, base rate margins from minus 50 basis points to plus 50 basis points, an unused portion fee from 17.5 basis points to 30 basis points and letter of credit fees from 100 basis points to 200 basis points in each case based on the Company’s leverage ratio. Under the Amended Credit Agreement, the Company must maintain a minimum debt service coverage ratio set at 1.25 to 1.00 and a maximum leverage ratio set at 3.25 to 1.00. The Amended Credit Agreement provides for a pledge by the Company of certain land and structures, accounts receivable and other assets to secure indebtedness under this agreement. The Amended Credit Agreement contains certain customary representations and warranties, affirmative and negative covenants and provisions relating to events of default. Under the Amended Credit Agreement, if an event of default occurs, the banks will be entitled to take various actions, including the acceleration of amounts due.

At ~~September~~June 30, 2019, the Company had borrowings of $81.0 million and outstanding letters of credit of $26.1 million under the Amended Credit Agreement. At December 31, 2018, the Company had borrowings of ~~$15.0~~$20.0 million and outstanding letters of credit of $27.7 million under the Restated Credit Agreement. ~~At December 31, 2017, the Company had borrowings of $43.0 million and outstanding letters of credit of $33.9 million under the Restated Credit Agreement.~~ The available portion of the ~~Restated~~Amended Credit Agreement may be used for general corporate purposes, including capital expenditures, working capital and letter of credit requirements as needed.

In 2002, the Company issued $100 million in Senior Notes under a $125 million (amended to $150 million in April 2005) Master Shelf Agreement with Prudential Investment Management, Inc. and certain of its affiliates. The Company issued an additional $25 million in Senior Notes on November 30, 2007 and $25 million in Senior Notes on January 31, 2008 under the same Master Shelf Agreement. Upon maturity in December 2017, the Company paid off the outstanding balance of the Senior Notes.

The Company is obligated under ~~capital~~finance leases with ~~seven year~~seven-year terms covering revenue equipment totaling ~~$106.3~~$98.9 million and ~~$89.9~~$102.9 million as of ~~September~~June 30, ~~2018~~2019 and December 31, ~~2017,~~2018, respectively. Amortization of assets held under the ~~capital~~finance leases is included in depreciation and amortization expense. The weighted average interest rates for the ~~capital~~finance leases at ~~September~~June 30, ~~2018~~2019 and December 31, ~~2017~~2018 were 3.4 ~~percent and 3.1 percent, respectively.~~percent.

The principal maturities of long-term debt, including interest on ~~capital~~finance leases, for the next five years (in thousands) are as follows:

	Amount		Amount
2018	$	5,240
2019		20,959	$	11,034
2020		35,959		22,068
2021		21,537		22,593
2022		20,101		20,857
2023				15,278
Thereafter		28,968		97,530
Total		132,764		189,360
Less: Amounts Representing Interest on Capital Leases		11,427
Less: Amounts Representing Interest on Finance Leases				9,481
Total	$	121,337	$	179,879

The Company’s leases include but are not limited to real estate, including terminals and general office buildings, trailers, corporate fleet vehicles and other equipment. Leases with an initial term of 12 months or less are not recorded on the consolidated balance sheet; the Company recognizes lease expense for these leases on a straight-line basis over the lease term.

As of June 30, 2019, approximately $116.2 million of finance leased assets, net of depreciation, were included in Property and Equipment. Accumulated depreciation for these assets totaled $31.7 million as of the same period ended.

Supplemental cash flow and balance sheet information related to leases was as follows:

As previously disclosed in our 2018 Annual Report on Form 10-K and under the previous lease accounting standard, future minimum lease payments for non-cancellable operating leases requiring minium annual rentals payable would have been as follows (in thousands):

Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations

This Management’s Discussion and Analysis should be read in conjunction with the accompanying unaudited condensed consolidated financial statements and our ~~2017~~2018 audited consolidated financial statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, ~~2017.~~2018. Those consolidated financial statements include additional information about our significant accounting policies, practices and the transactions that underlie our financial results.

The Securities and Exchange Commission (the SEC) encourages companies to disclose forward-looking information so that investors can better understand the future prospects of a company and make informed investment decisions. This Quarterly Report on Form 10-Q, including "Management's Discussion and Analysis of Financial Condition and Results of Operations,” contains these types of statements, which are forward-looking within the meaning of the Private Securities Litigation Reform Act of 1995. Words such as “anticipate,” “estimate,” “expect,” “project,” “intend,” “may,” “plan,” “predict,” “believe,” “should” and similar words or expressions are intended to identify forward-looking statements. Investors should not place undue reliance on forward-looking statements, and the Company undertakes no obligation to publicly update or revise any forward-looking statements. All forward-looking statements reflect the present expectation of future events of our management as of the date of this Quarterly Report on Form 10-Q and are subject to a number of important factors, risks, uncertainties and assumptions that could cause actual results to differ materially from those described in any forward-looking statements. These factors, risks, uncertainties and assumptions include, but are not limited to, the following:

These factors and risks are described in Part II, Item 1A. “Risk Factors” of the Company’s Annual Report on Form 10-K for the year ended December 31, ~~2017,~~2018, as updated by Part II, Item 1A. of this Quarterly Report on Form 10-Q.

As a result of these and other factors, no assurance can be given as to our future results and achievements. Accordingly, a forward-looking statement is neither a prediction nor a guarantee of future events or circumstances and those future events or circumstances may not occur. You should not place undue reliance on the forward-looking statements, which speak only as of the date of this Form 10-Q. We are under no obligation, and we expressly disclaim any obligation, to update or alter any forward-looking statements, whether as a result of new information, future events or otherwise.

The Company’s business is highly correlated to non-service sectors of the general economy. The Company’s strategy is to improve profitability by increasing yield while also increasing volumes to build density in existing geography and to expand our service geography into the Northeastern United States. The Company’s business is ~~both~~ labor intensive, capital intensive and ~~capital intensive.~~service sensitive. The Company ~~maintains competitive compensation, benefits~~looks for opportunities to improve safety, cost effectiveness and ~~training programs~~asset utilization (primarily tractors and trailers). Pricing initiatives have had a positive impact on yield and profitability. The Company continues to minimize turnover while supporting its value proposition. The Company’s business requires continual investment in safe, reliable and efficient equipment and the acquisition of terminal assets. These investments along with on-going investments in technology and analytics are designed to optimize the network while meeting and exceeding customers’ standards of service. These investments coupled withexecute targeted sales and marketing ~~efforts provide the~~programs along with initiatives to align costs with volumes and improve customer satisfaction. Technology continues to be an important investment that is improving customer experience, operational efficiencies and Company ~~with a framework to improve profitability through pricing initiatives, effective cost management and volume growth.~~image.

The Company’s operating revenue increased by ~~19.2~~8.3 percent in the ~~third~~second quarter of ~~2018~~2019 compared to the same period in ~~2017.~~2018. The increase resulted primarily from ~~increased shipments, tonnage, fuel surcharges,~~pricing actions and ~~pricing actions. Expansion into the Northeastern United States and the new Canadian marketing arrangement which began in the second quarter of 2017 were contributing factors in the~~ increased shipments and ~~tonnage in the third quarter of 2018.~~fuel surcharges.

Consolidated operating income was ~~$38.7~~$51.2 million for the ~~third~~second quarter of ~~2018~~2019 compared to ~~$24.6~~$41.6 million for the ~~third~~second quarter of ~~2017.~~2018. In the ~~third~~second quarter of ~~2018,~~2019, LTL shipments ~~and tonnage~~were up 3.6 percent per workday ~~were up 5.4~~and LTL tonnage was down 1.9 percent ~~and 7.3 percent, respectively,~~per workday versus the prior year quarter. Diluted earnings per share were ~~$1.07~~$1.40 in the ~~third~~second quarter of ~~2018,~~2019, compared to diluted earnings per share of ~~$0.55~~$1.15 in the prior year ~~quarter, which was partially driven by the fact that the Tax Cuts and Jobs Act, as discussed further in the Outlook section below, was not enacted until December 2017.~~quarter. The operating ratio (operating expenses divided by operating revenue) was ~~90.9~~89.0 percent in the ~~third~~second quarter of ~~2018~~2019 compared to ~~93.1~~90.3 percent in the ~~third~~second quarter of ~~2017.~~2018.

The Company ~~had $187.1~~generated $113.6 million in net cash provided by operating activities in the first ~~nine~~six months of ~~2018~~2019 compared with ~~$127.7~~$112.1 million in the same period last year. The increase is primarily due to ~~an increase in~~improved operating income ~~decreased income tax expense and~~partially offset by working capital ~~fluctuations.~~needs. The ~~Company had~~Company’s net cash used in investing activities ~~of $154.4~~was $166.1 million during the first ~~nine~~six months of ~~2018~~2019 compared to ~~$152.6~~$118.2 million in the first ~~nine~~six months of ~~2017,~~2018, primarily as a result of the timing of capital expenditures for revenue equipment and real estate in the first ~~nine~~six months of ~~2018.~~2019. The Company’s ~~net cash used in financing activities was $36.9 million in the first nine months of 2018 compared to $23.4 million~~ net cash provided by financing activities was $50.8 million in the first six months of 2019 compared to $2.5 million during the same period last year, primarily due to ~~reduced~~increased borrowing (net of repayments) largely to fund capital expenditures. The Company had ~~$15.0~~$81.0 million in outstanding borrowings under its revolving credit agreement, outstanding letters of credit of ~~$29.5~~$27.9 million and a minimal cash and cash equivalents balance ~~of $0.5 million~~ at ~~September~~June 30, ~~2018.~~2019. The Company also had ~~$106.3~~$98.9 million in obligations under ~~capital~~finance leases at ~~September~~June 30, ~~2018.~~2019. The Company was in compliance with the debt covenants under its revolving credit agreement at ~~September~~June 30, ~~2018.~~2019.

The following Management’s Discussion and Analysis describes the principal factors affecting the results of operations, liquidity and capital resources, as well as the critical accounting policies of Saia, Inc. and its wholly-owned subsidiaries (together, the Company or Saia).

Saia is a transportation company headquartered in Johns Creek, Georgia that provides ~~regional and interregional~~ less-than-truckload (LTL) services ~~across 40 states~~ through a single integrated organization. While ~~approximately~~historically 97 percent of its revenue ishas been derived from transporting LTL shipments across 42 states, the Company also offers customers a wide range of other value-added services, including non-asset truckload, expedited and logistics services ~~throughout~~across North America.

Our business is highly correlated to non-service sectors of the general economy. Our business also is impacted by a number of other factors as discussed under “Forward Looking Statements” and Part II, Item 1A. “Risk Factors.” The key factors that affect our operating results are the volumes of shipments transported through our network, as measured by our average daily shipments and tonnage; the prices we obtain for our services, as measured by revenue per hundredweight (a measure of yield) and revenue per shipment; our ability to manage our cost structure for capital expenditures and operating expenses such as salaries, wages and benefits; purchased transportation; claims and insurance expense; fuel and maintenance; and our ability to match operating costs to shifting volume levels.

							Percent									Percent
							Variance									Variance
	2018			2017 As Adjusted (1)			'18 v. '17			2019			2018			'19 v. '18
	(in thousands, except ratios and revenue per hundredweight)									(in thousands, except ratios and revenue per hundredweight)
Operating Revenue	$	425,562		$	357,010			19.2	%	$	464,195		$	428,732			8.3		%
Operating Expenses:
Salaries, wages and employees’ benefits		224,635			194,920			15.2			237,689			220,406			7.8
Purchased transportation		31,216			30,056			3.9			34,154			34,113			0.1
Depreciation and amortization		26,694			22,338			19.5			29,143			25,241			15.5
Fuel and other operating expenses		104,320			85,128			22.5			112,043			107,407			4.3
Operating Income		38,697			24,568			57.5			51,166			41,565			23.1
Operating Ratio		90.9	%		93.1	%		2.4			89.0	%		90.3	%		1.4
Nonoperating Expense		1,271			1,182			7.5			1,763			1,312			34.4

Working Capital (as of September 30, 2018 and 2017)		14,906			17,017
Cash Flows provided by Operations (year to date)		187,110			127,737
Working Capital (as of June 30, 2019 and 2018)											24,199			27,110
Cash Flows provided by Operating Activities (year to date)											113,574			112,118
Net Acquisitions of Property and Equipment (year to date)		154,439			152,586						166,054			118,155

Saia Motor Freight Operating Statistics:
LTL Tonnage		1,208			1,126			7.3			1,254			1,278			(1.9	)
LTL Shipments		1,780			1,690			5.4			1,933			1,866			3.6
LTL Revenue per hundredweight	$	17.20		$	15.38			11.9		$	18.05		$	16.44			9.8

Quarter and ~~nine~~six months ended ~~September~~ended June 30, ~~2018~~2019 compared to Quarter and ~~nine~~six months ended ~~September~~ended June 30, ~~2017~~2018

Consolidated revenue for the quarter ended ~~September~~June 30, ~~2018~~2019 increased ~~19.2~~8.3 percent to ~~$425.6~~$464.2 million primarily as a result of increased ~~tonnage,~~ shipments, ~~fuel surcharges,~~ and pricing ~~actions. Continued expansion into the Northeastern United States was a contributing factor in the continued increased shipments and~~actions partially offset by lower tonnage in the ~~third~~second quarter of ~~2018.~~2019. Saia’s LTL revenue per

hundredweight (a measure of yield) increased ~~11.9~~9.8 percent to ~~$17.20~~$18.05 per hundredweight for the ~~third~~second quarter of ~~2018~~2019 as a result of increased rates and changes in business ~~mix, fuel surcharges and length of haul.~~mix. For the ~~third~~second quarter of ~~2018,~~2019, Saia’s LTL tonnage ~~increased 7.3~~decreased 1.9 percent per workday to ~~1.2~~1.3 million tons, and LTL shipments increased ~~5.4~~3.6 percent per workday to ~~1.8~~1.9 million shipments. For the ~~third~~second quarter of ~~2018,~~2019, approximately 75 to 80 percent of Saia’s operating revenue was subject to specific customer price negotiations that occur throughout the year. The remaining 20 to 25 percent of operating revenue was subject to a general rate increase which is based on market conditions. For these customers subject to a general rate increase, on ~~July 17, 2017 and~~ May 21, 2018 and February 18, 2019, Saia implemented ~~a 4.9 percent and~~ 5.9 percent general rate ~~increase, respectively.~~increases. Competitive factors, customer turnover and mix changes, impact the extent to which customer rate increases are retained over time.

Operating revenue includes fuel surcharge revenue from the Company’s fuel surcharge program. That program is designed to reduce the Company’s exposure to fluctuations in fuel prices by adjusting total freight charges to account for changes in the price of fuel. The Company’s fuel surcharge is based on the average national price for diesel fuel and is reset weekly. Fuel surcharges have remained in effect for several years, are widely accepted in the industry and are a significant component of revenue and pricing. Fuel surcharges are an integral part of customer contract negotiations but represent only one portion of overall customer price negotiations as customers may negotiate increases in base rates instead of increases in fuel surcharges or vice versa. Fuel surcharge revenue ~~increased to 13.8 percent~~as a percentage of operating revenue ~~for the quarter ended September 30, 2018 compared~~decreased to ~~11.1~~13.2 percent for the quarter ended ~~September~~June 30, ~~2017,~~2019 compared to 13.8 percent for the quarter ended June 30, 2018, as a result of ~~increases~~decreases in the cost of fuel.

For the ~~nine~~six months ended ~~September~~June 30, ~~2018,~~2019, operating revenues were ~~$1,247.1~~$874.8 million, up ~~19.4~~6.5 percent from ~~$1,044.5~~$821.5 million for the ~~nine~~six months ended ~~September~~June 30, ~~2017,~~2018, primarily due to pricing actions and increased ~~tonnage, shipments, fuel surcharges and pricing actions.~~shipments. Fuel surcharge revenue ~~increased to 13.5 percent~~as a percentage of operating revenue ~~for the nine months ended September 30, 2018 compared~~decreased to ~~11.0~~13.0 percent for the ~~nine~~six months ended ~~September~~June 30, ~~2017,~~2019, compared to 13.4 percent for the six months ended June 30, 2018, as a result of ~~increased fuel prices.~~decreases in the cost of fuel.

Consolidated operating income was ~~$38.7~~$51.2 million in the ~~third~~second quarter of ~~2018~~2019 compared to ~~$24.6~~$41.6 million in the prior year quarter. Overall, the operations were favorably impacted in the ~~third~~second quarter of ~~2018~~2019 by ~~higher tonnage, shipments, fuel surcharge and~~ pricing actions and higher shipments and fuel surcharges, which were offset by salary and wage increases, ~~higher fuel and purchased transportation costs,~~ increased depreciation expense and costs associated with the Company’s geographic expansion. The ~~third~~second quarter of ~~2018~~2019 operating ratio (operating expenses divided by operating revenue) was ~~90.9~~89.0 percent compared to ~~93.1~~90.3 percent for the same period in ~~2017.~~2018.

Salaries, wages and benefits increased ~~$29.7~~$17.3 million in the ~~third~~second quarter of ~~2018~~2019 compared to the ~~third~~second quarter of ~~2017~~2018 largely due to higher wages associated with increased headcount in the ~~third~~second quarter of ~~2018,~~2019, a wage increase in July 2018 and higher healthcare benefit costs. Fuel, operating expenses and supplies increased ~~$15.0~~$0.6 million in the ~~third~~second quarter of ~~2018~~2019 compared to the prior year quarter largely due to ~~higher fuel costs,~~ increases in other operating expenses and supplies, including increased expenses related to the geographic expansion, partially offset by improved fuel efficiency resulting from a newer fleet. During the ~~third~~second quarter of ~~2018,~~2019, claims and insurance expense was ~~$1.5~~$3.2 million higher than the ~~previous year~~second quarter of 2018 primarily due to increased ~~insurance premiums, as well as by increased cargo~~severity of claims. Purchased transportation ~~increased $1.2 million~~was consistent in the ~~third~~second quarter of 2019 compared to the second quarter of 2018 ~~compared to the third quarter of 2017~~ primarily due to shipment increases ~~in purchased transportation cost per mile and~~offset by higher utilization of ~~purchased transportation carriers~~existing fleet capacity to maintain service requirements ~~while supporting increased shipments, tonnage and length of haul~~ during the ~~third~~second quarter of ~~2018.~~2019.

For the ~~nine~~six months ended ~~September~~June 30, ~~2018,~~2019, consolidated operating income was ~~$107.8~~$79.8 million, up ~~50.2~~15.4 percent compared to ~~$71.8~~$69.1 million for the ~~nine~~six months ended ~~September~~June 30, ~~2017.~~2018.

Salaries, wages and benefits increased ~~$84.0~~$26.5 million during the first ~~nine~~six months of ~~2018~~2019 compared to the same period last year largely due to ~~increased~~higher wages associated with increased headcount in the first ~~nine~~six months of ~~2018,~~2019, a wage increase in ~~July 2017 as well as~~ July 2018 and higher healthcare benefit costs. Fuel, operating expenses and supplies increased ~~$48.4~~$5.3 million during the first ~~nine~~six months of ~~2018~~2019 compared to the same period last year largely due to ~~higher fuel costs,~~ increases in other operating expenses and supplies, including increased expenses related to the geographic ~~expansion.~~expansion, partially offset by improved fuel efficiency resulting from a newer fleet. During the first ~~nine~~six months of ~~2018,~~2019, claims and insurance expense was ~~$2.1~~$2.6 million higher than the same period last year primarily due to increased ~~cargo claims and higher insurance premiums partially offset by decreased accident frequency and severity.~~severity of claims. Purchased transportation ~~increased $15.7~~decreased $1.5 million for the first six months of 2019 compared to the ~~first nine months of 2017~~same period last year primarily due to shipment increases ~~in purchased transportation cost per mile and~~offset by higher utilization of ~~purchased transportation carriers~~existing fleet capacity to maintain service requirements ~~while supporting increased shipments, tonnage and length of haul~~ during the first ~~nine~~six months of ~~2018.~~2019.

Substantially all non-operating expenses represent interest expense. Interest expense in the ~~third~~second quarter of ~~2018~~2019 was ~~$0.1~~$0.4 million higher than the ~~third~~second quarter of ~~2017~~2018 due to increased average borrowings in the second quarter of 2019. Interest expense in the first six months of 2019 was $0.6 million higher than the first six months of 2018 due to increased average interest rates ~~partially offset by decreased average borrowings in the third quarter of 2018. Interest expense in the first nine months of 2018 was $0.3 million higher than the first nine months of 2017 due to~~and increased ~~average interest rates, partially offset by decreased~~ average borrowings in the first ~~nine~~six months of ~~2018.~~2019.

The effective tax rate was ~~24.7~~25.0 percent and ~~38.5~~24.8 percent for the quarters ended ~~September~~June 30, ~~2018~~2019 and ~~2017,~~2018, respectively. The ~~decrease~~increase in the ~~third~~second quarter tax rate in ~~2018~~2019 is primarily a result of ~~the Tax Cuts and Jobs Act, which reduced corporate~~decreased excess tax ~~rates effective January 1, 2018, as discussed further in the Outlook section below.~~

benefits related to stock activity. For the ~~nine~~six months ended ~~September~~June 30, 2019 and June 30, 2018, the effective tax rate was 23.6 percent compared to 36.2 percent for the nine months ended September 30, 2017. The decrease in the nine month tax rate in 2018 is primarily a result of the Tax Cuts and Jobs Act, as discussed further in the Outlook section below. Additionally, the effective tax rate for the first nine months of 2018 was also lower due to discrete impacts of legislation surrounding alternative fuel tax credits enacted in the first quarter of 2018 for the entire year of 2017, partially offset by reduced excess tax benefits from stock activity in the first nine months of 2018 as compared to the first nine months of 2017. Alternative fuel tax credits have not been enacted for 2018.22.9 percent.

Net income was ~~$28.2~~$37.1 million, or ~~$1.07~~$1.40 per diluted share, in the ~~third~~second quarter of ~~2018~~2019 compared to net income of ~~$14.4~~$30.3 million, or ~~$0.55~~$1.15 per diluted share, in the ~~third~~second quarter of ~~2017.~~2018. Net income was ~~$79.6~~$59.3 million, or ~~$3.02~~$2.25 per diluted share, for the first ~~nine~~six months of ~~2018~~2019 compared to net income of ~~$43.3~~$51.4 million, or ~~$1.67~~$1.95 per diluted share, for the first ~~nine~~six months of ~~2017.~~2018.

Working capital at ~~September~~June 30, ~~2018~~2019 was ~~$14.9~~$24.2 million, which decreased from working capital at ~~September~~June 30, ~~2017~~2018 of ~~$17.0~~$27.1 million.

Current assets at ~~September~~June 30, ~~2018~~2019 increased by ~~$24.4~~$28.7 million as compared to ~~September~~June 30, ~~2017~~2018 and includes an increase in accounts receivable of ~~$26.2~~$26.4 million. Current liabilities increased by ~~$26.5~~$31.6 million at ~~September~~June 30, 2019 compared to June 30, 2018 ~~compared to September 30, 2017~~ largely due to the addition of operating lease liabilities as a result of the adoption of ASU 2016-02 on January 1, 2019 and increases in accrued taxes, accrued wages, vacation and employee benefits and claims and insurance ~~accruals partially offset by a decrease in accounts payable.~~accruals. Cash flows provided by operating activities were ~~$187.1~~$113.6 million for the ~~nine~~six months ended ~~September~~June 30, ~~2018~~2019 versus ~~$127.7~~$112.1 million for the ~~nine~~six months ended ~~September~~June 30, ~~2017.~~2018. For the ~~nine~~six months ended ~~September~~June 30, ~~2018,~~2019, net cash used in investing activities was ~~$154.4~~$166.1 million versus ~~$152.6~~$118.2 million in the same period last year, a ~~$1.8~~$47.9 million increase. This increase resulted primarily from ~~lower proceeds from sales~~increased acquisitions of ~~assets.~~revenue equipment, technology and real estate. The Company currently plans net capital expenditures in ~~2018~~2019 of approximately ~~$265~~$275 to $300 million. For the ~~nine~~six months ended ~~September~~June 30, ~~2018, net cash used in financing activities was $36.9 million compared to $23.4 million~~2019, net cash provided by financing activities was $50.8 million compared to $2.5 million during the same period last year, as a result of ~~reduced~~increased borrowing (net of repayments) on the revolving credit agreement to fund capital expenditures.

Our business remains highly correlated to non-service sectors of the general economy and competitive pricing pressures, as well as the success of Company-specific improvement initiatives. There remains uncertainty as to the strength of economic conditions. We are continuing initiatives to increase yield, reduce costs and improve productivity. We focus on providing top quality service and improving safety performance. On ~~May 21, 2018,~~February 18, 2019, Saia implemented a 5.9 percent general rate increase for customers comprising approximately 20 to 25 percent of Saia’s operating revenue. The extent of the success of these revenue initiatives is impacted by what proves to be the underlying economic trends, competitor initiatives and other factors discussed under “Forward-Looking Statements” and Part II, Item 1A. “Risk Factors.”

With the enactment of the Tax Cuts and Jobs Act (the “Act”) in December 2017, the federal corporate income tax rate was reduced from 35 percent to 21 percent effective January 1, 2018. The Company is uncertain how these federal income tax changes will affect state and local taxation, which often uses federal taxable income as a starting point for computing state and local tax liabilities. Accordingly, the Company has not yet finalized its estimate of the impact of certain items and generally continues to account for those items based on the tax laws in effect prior to the Act. As further interpretations, clarifications and amendments to the applicable tax laws and regulations are made, the Company's future financial statements could be impacted. In all cases, the Company has continued to refine its calculations and expects completion during the fourth quarter financial reporting period.

The Company currently expects the effective tax rate for ~~2018~~2019 to be ~~in the range of 24 percent to 25~~approximately 23.5 percent. The effective tax rate may vary from quarter to quarter due to unusual or infrequently occurring discrete items, the resolution of income tax audits, changes in tax laws, including alternative fuel tax credits, or the tax impact from employee share-based payments.

Effective July ~~1, 2018,~~2019, the Company implemented a market competitive salary and wage increase for all of its employees. The cost of the compensation increase is expected to be approximately ~~$19~~$21 million annually, and the Company anticipates the impact will be partially offset by productivity and efficiency gains.

If the Company builds market share, including through its geographic expansion, it expects numerous operating leverage cost benefits. Conversely, should the economy soften from present levels, the Company plans to match resources and capacity to shifting volume levels to lessen unfavorable operating leverage. The success of cost improvement initiatives is also impacted by the cost and availability of drivers and purchased transportation, fuel, self-insurance claims and insurance ~~claims,~~expense, regulatory changes, successful expansion of our service geography into the Northeastern United States and other factors discussed under “Forward-Looking Statements” and Part II, Item 1A. “Risk Factors.”

See “Forward-Looking Statements” and Part II, Item 1A. “Risk Factors” for a more complete discussion of potential risks and uncertainties that could materially affect our future performance.

~~In May 2014, the FASB issued ASU No. 2014-09,~~ ~~Revenue from Contracts with Customers~~, which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services. The ASU replaced most existing revenue recognition guidance in U.S. generally accepted accounting principles when it became effective for the Company on January 1, 2018. The Company adopted the standard using the retrospective transition method.

The Company has consistently applied the accounting policies to all periods presented in these condensed consolidated financial statements. Refer to Note 1 of the Condensed Consolidated Financial Statements for details as to the impact of the adoption of this standard on previously issued financial information.

In February 2016, the FASB established Topic 842, Leases, by issuing ~~Accounting Standards Update (ASU)~~ASU No. 2016-02, which requires lessees to recognize leases on the balance sheet and disclose key information about leasing arrangements. Topic 842 was subsequently amended by ASU No. 2018-01, Land Easement Practical Expedient for Transition to Topic 842; ASU No. 2018-10, Codification Improvements to Topic 842, Leases; and ASU No. 2018-11, Targeted Improvements. The new standard establishes a right-of-use (ROU) model ~~(ROU)~~ that requires a lessee to recognize a ROU asset and lease liability on the balance sheet for all leases with a term longer than 12 months. Leases ~~will be~~are classified as finance or operating, with the classification affecting the pattern and classification of expense recognition in the income statement.

As of January 1, 2019, the Company ~~also currently expects to elect~~recognized additional net lease assets and operating liabilities of approximately $77 million, with corresponding ROU assets of the ~~practical expedient to not separate lease and non-lease components~~same amount based on the present value of the remaining minimum rental payments for existing operating leases. Per the requirements of the new standard for measurement of the ROU, approximately $3 million of deferred rent liability was reclassified as a contra account against the ROU asset. Substantially all of ~~its leases~~the balance came from the Claims, insurance and other ~~than leases~~section of ~~real estate.~~the balance sheet reported at December 31, 2018.

~~The~~Prior to February 5, 2019, the Company iswas party to a Restated Credit Agreement with a group of banks ~~to fund capital investments, letters of credit and working capital needs. The Restated Credit Agreement is~~that included a revolving credit facility for up to $250 million expiring in March 2020. The Restated Credit Agreement also ~~has~~had an accordion feature that ~~allows~~allowed for an additional $75 million availability, subject to lender approval. The Restated Credit Agreement ~~provides~~provided for a LIBOR rate margin range from 112.5 basis points to 225 basis points, base rate margins from minus 12.5 basis points to plus 50 basis points, an unused portion fee from 20 basis points to 30 basis points and letter of credit fees from 112.5 basis points to 225 basis points, in each case based on the Company’s leverage ratio.

On February 5, 2019, the Company entered into the Sixth Amended and Restated Credit Agreement with its banking group (as amended, the Amended Credit Agreement). The amendment increased the amount of the revolver from $250 million to $300 million and extended the term until February 2024. The Amended Credit Agreement also has an accordion feature that allows for an additional $100 million availability, subject to bank approval. The amendment reduced the interest rate pricing grid compared to the Restated Credit Agreement. The Amended Credit Agreement provides for aLIBOR rate margin range from 100 basis points to 200 basis points, base rate margins from minus 50 basis points to plus 50 basis points, an unused portion fee from 17.5 basis points to 30 basis points and letter of credit fees from 100 basis points to 200 basis points in each case based on the Company’s leverage ratio. Under the Amended Credit Agreement, the Company must maintain a minimum debt service coverage ratio set at 1.25 to 1.00 and a maximum leverage ratio set at 3.25 to 1.00. The Amended Credit Agreement provides for a pledge by the Company of certain land and structures, accounts receivable and other assets to secure indebtedness under this agreement. The Amended Credit Agreement contains certain customary representations and warranties, affirmative and negative covenants and provisions relating to events of default. Under the Amended Credit Agreement, if an event of default occurs, the banks will be entitled to take various actions, including the acceleration of amounts due.

The Company has historically generated cash flows from operations to fund a large portion of its capital expenditure requirements. Cash flows from operating activities were ~~$157.8~~$256.4 million for the year ended December 31, ~~2017,~~2018, while net cash used in investing activities was ~~$181.5~~$222.6 million. Cash flows provided by operating activities were ~~$187.1~~$113.6 million for the ~~nine~~six months ended ~~September~~June 30, ~~2018, $59.4~~2019, $1.5 million higher than the first ~~nine~~six months of the prior year. The increase is primarily due to ~~an increase in~~improved operating income ~~a decrease in income tax expense and~~partially offset by working capital ~~fluctuations.~~needs. The timing of capital expenditures can largely be managed around the seasonal working capital requirements of the Company. The Company believes it has adequate sources of capital to meet short-term liquidity needs through its operating cash flows and availability under the ~~Restated~~Amended Credit Agreement. At ~~September~~June 30, ~~2018,~~2019, the Company had ~~$207.3~~$192.9 million in availability under the ~~Restated~~Amended Credit Agreement, subject to the Company’s satisfaction of existing debt covenants. Future operating cash flows are primarily dependent upon the Company’s profitability and its ability to manage its working capital requirements, primarily accounts receivable, accounts payable and wage and benefit accruals. The Company was in compliance with its debt covenants at ~~September~~June 30, ~~2018.~~2019.

Effective March 1, 2018, the Company entered into a new bodily injury and property damage liability policy with a three-year term. The Company is responsible for the risk retention amount per occurrence of $2.0 million under the new policy. Thereafter, the policy provides insurance coverage for a single loss of $8.0 million, an aggregate loss limit of $24.0 million for each policy year, and a $48.0 million aggregate loss limit for the 36-month term ended March 1, 2021. Under the policy the Company may elect to commute the policy with respect to the first 12 months of the policy term and concurrently extend the policy for an additional one-year period if paid losses in the first 12 months of the policy are less than $5.2 million. In the event the Company elects to commute the policy for such period, it will be entitled to a return of a portion of the premium paid, up to $5.2 million, based on the amount of claims paid and the insurer will be released from all liability in connection with such 12-month period. As a result, if the Company elects to commute the policy as to such period, the Company will be self-insured for $10 million per occurrence with respect to such 12-month period. The decision whether to commute the first 12 months of the policy could not be made before March 1, 2019 and must be made prior to August 2019, unless the insurer agrees to extend such date. In addition, the Company may elect to commute the policy with respect to the insurer’s entire liability under the policy commencing on August 30, 2021 in which case the Company will be entitled to a return of a portion of the premium paid, up to $15.6 million, based on the amount of claims paid and the insurer will be released from all liability under the policy. As a result, if the Company elects to commute the policy as to the entire policy term, the Company will be self-insured up to $10 million per occurrence for such period. Additionally, the Company may be required to pay an additional premium of up to $11.0 million if paid losses are greater than $15.6 million over the three-year policy period. Based on claims experience since inception of the policy, no such additional premium was accrued at June 30, 2019. The Company has not made a decision whether to commute the first 12 months of the policy. As such, no related amounts were recorded at June 30, 2019.

Net capital expenditures pertain primarily to investments in tractors and trailers and other revenue equipment, information technology, land and structures. Projected net capital expenditures for ~~2018~~2019 are ~~in excess of $265~~$275 to $300 million, inclusive of equipment acquired using ~~capital~~finance leases. This represents an increase of approximately $23 million to $48 million ~~increase~~ from ~~2017~~2018 net capital expenditures of ~~$217~~$252 million for property and equipment, inclusive of equipment acquired using ~~capital leases.~~finance leases, information technology, and land and structures. Projected ~~2018~~2019 capital expenditures include a normal replacement cycle of revenue equipment and technology investment for our operations. In addition, the Company is adding revenue equipment and real estate investments to support our growth initiatives. Net capital expenditures were ~~$182.5~~$171.1 million in the first ~~nine~~six months of ~~2018,~~2019, inclusive of equipment acquired using ~~capital~~finance leases. Approximately ~~$69.0~~$77.8 million of the ~~2018~~2019 remaining capital budget was committed as of ~~September~~June 30, ~~2018.~~2019.

In accordance with U.S. generally accepted accounting principles, our operating leases are not recorded in our condensed consolidated balance sheet; however, the future minimum lease payments are included in the “Contractual Obligations” table below. See the notes to our audited consolidated financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2017 for additional information. In addition to the principal amounts disclosed in the tables below, the Company has interest obligations of approximately ~~$1.3~~$3.6 million for the remainder of ~~2018~~2019 and decreasing for each year thereafter based on borrowings and commitments outstanding at ~~September~~June 30, ~~2018.~~2019.

The following tables set forth a summary of our contractual cash obligations and other commercial commitments as of ~~September~~June 30, ~~2018~~2019 (in millions):

	Payments due by year															Payments due by year
	2018		2019		2020			2021		2022		Thereafter		Total		2019		2020		2021		2022		2023		Thereafter		Total
Contractual cash obligations:
Long-term debt obligations:
Revolving line of credit (1)	$	—	$	—	$	15.0		$	—	$	—	$	—	$	15.0	$	—	$	—	$	—	$	—	$	—	$	81.0	$	81.0
Leases:
Capital Leases (1)		5.2		21.0		21.0			21.5		20.1		29.0		117.8
Finance Leases (1)																	11.0		22.1		22.6		20.9		15.3		16.5		108.4
Operating leases(2)		5.5		20.5		16.5	��		13.9		11.2		31.3		98.9		11.6		18.8		15.7		12.5		8.9		23.5		91.0
Purchase obligations ~~(2)~~(3)		71.1		0.8		0.8			—		—		—		72.7		78.7		—		—		—		—		—		78.7
Total contractual obligations	$	81.8	$	42.3	$	53.3		$	35.4	$	31.3	$	60.3	$	304.4	$	101.3	$	40.9	$	38.3	$	33.4	$	24.2	$	121.0	$	359.1

	Amount of commitment expiration by year														Amount of commitment expiration by year
	2018		2019		2020		2021		2022		Thereafter		Total		2019		2020		2021		2022		2023		Thereafter		Total
Other commercial commitments:
Available line of credit (1)	$	—	$	—	$	207.3	$	—	$	—	$	—	$	207.3	$	—	$	—	$	—	$	—	$	—	$	192.9	$	192.9
Letters of credit		—		29.5		—		—		—		—		29.5		—		27.9		—		—		—		—		27.9
Surety bonds		0.6		48.3		—		—		—		—		48.9		4.8		44.4		—		—		—		—		49.2
Total commercial commitments	$	0.6	$	77.8	$	207.3	$	—	$	—	$	—	$	285.7	$	4.8	$	72.3	$	—	$	—	$	—	$	192.9	$	270.0

The Company has accrued approximately $1.0 million for uncertain tax positions and ~~$0.1~~$0.2 million for interest and penalties related to the uncertain tax positions as of ~~September~~June 30, ~~2018.~~2019. The Company cannot reasonably estimate the timing of cash ~~settlement~~settlements with respective taxing authorities beyond one year and accordingly has not included the amounts within the above contractual cash obligations and other commercial commitment tables.

At ~~September~~June 30, ~~2018,~~2019, the Company has ~~$78.1~~$86.4 million in claims and insurance liabilities. The Company cannot reasonably estimate the timing of cash ~~settlement~~settlements with respective adverse parties beyond one year and accordingly has not included the amounts within the above contractual cash obligations and other commercial commitment tables.

The Company makes estimates and assumptions in preparing the condensed consolidated financial statements that affect reported amounts and disclosures therein. In the opinion of management, the accounting policies that generally have the most significant impact on the financial position and results of operations of the Company include:

~~Revenue Recognition and Related Allowances~~
•
Revenue Recognition and Related Allowances. Revenue is recognized over the transit time of the shipment as it moves from origin to destination while expenses are recognized as incurred. In addition, estimates included in the recognition of revenue and accounts receivable include estimates of shipments in transit and estimates of future adjustments to revenue and accounts receivable for billing adjustments and collectability.

Revenue is recognized in a systematic process whereby estimates of shipments in transit are based upon actual shipments picked up, scheduled day of delivery and ~~estimates~~current trend in average rates charged to customers. Since the cycle for pickup and delivery of ~~future adjustments to~~shipments is generally 1-5 days, typically less than 5 percent of a total month’s revenue is in transit at the end of any month. Estimates for credit losses and ~~accounts receivable for~~ billing adjustments are based upon historical experience of credit losses, adjustments processed and ~~collectability.~~trends of collections. Billing adjustments are primarily made for discounts and billing corrections. These estimates are

continuously evaluated and updated; however, changes in economic conditions, pricing arrangements and other factors can significantly impact these estimates.

•

Depreciation and Capitalization of Assets. Under the Company’s accounting policy for property and equipment, management establishes appropriate depreciable lives and salvage values for the Company’s revenue equipment (tractors and trailers) based on their estimated useful lives and estimated residual values to be received when the equipment is sold or traded in. These estimates are routinely evaluated and updated when circumstances warrant. However, actual depreciation and residual values could differ from these assumptions based on market conditions and other factors.

Revenue is recognized in a systematic process whereby estimates of shipments in transit are based upon actual shipments picked up, scheduled day of delivery and current trend in average rates charged to customers. Since the cycle for pickup and delivery of shipments is generally 1-3 days, typically less than 5 percent of a total month’s revenue is in transit at the end of any month. Estimates for credit losses and billing adjustments are based upon historical experience of credit losses, adjustments processed and trends of collections. Billing adjustments are primarily made for discounts and billing corrections. These estimates are continuously evaluated and updated; however, changes in economic conditions, pricing arrangements and other factors can significantly impact these estimates.

~~Depreciation and Capitalization of Assets~~. Under the Company’s accounting policy for property and equipment, management establishes appropriate depreciable lives and salvage values for the Company’s revenue equipment (tractors and trailers) based on their estimated useful lives and estimated fair values to be received when the equipment is sold or traded in. These estimates are routinely evaluated and updated when circumstances warrant. However, actual depreciation and salvage values could differ from these assumptions based on market conditions and other factors.

•

~~Long-lived~~Accounting for Income Taxes. Significant management judgment is required to determine (i) the provision for income taxes, (ii) whether deferred income taxes will be realized in full or in part and (iii) the liability for unrecognized tax benefits related to uncertain tax positions. Income tax expense is equal to the current year’s liability for income taxes and a provision for deferred income taxes. Deferred tax assets ~~such as property, plant~~ and ~~equipment,~~liabilities are recorded for the future tax effects attributable to temporary differences between the financial statement carrying amounts of existing assets and ~~purchased intangible~~liabilities and their respective tax bases. Deferred tax assets ~~subject to amortization,~~and liabilities are ~~reviewed for impairment whenever events or changes in circumstances indicate that~~measured using the ~~carrying amount of an asset may not be recoverable. If circumstances require a long-lived asset or asset group to be tested for possible impairment, the Company compares undiscounted cash flows~~enacted tax rates expected to be ~~generated by~~applied to taxable income in the years in which those temporary differences are expected to be recovered or settled. When it is more likely that ~~asset~~all or ~~asset group~~some portion of specific deferred income tax assets will not be realized, a valuation allowance must be established for the amount of deferred income tax assets that are determined not to ~~its carrying value. If~~be realizable. A valuation allowance for deferred income tax assets has not been deemed necessary due to our profitable operations. Accordingly, if facts or financial circumstances change and consequently impact the ~~carrying value~~likelihood of realizing the ~~long-lived asset or asset group is not recoverable on an undiscounted cash flow basis, impairment is recognized~~deferred income tax assets, we would need to apply management’s judgment to determine the ~~extent that the carrying value exceeds its fair value. Fair value is determined through various~~amount of valuation ~~techniques including discounted cash flow models, quoted market values and third-party independent appraisals, as deemed necessary.~~allowance required in any given period.

~~Accounting for Income Taxes~~. Significant management judgment is required to determine (i) the provision for income taxes, especially in the initial periods following the enactment of significant tax law changes, (ii) whether deferred income taxes will be realized in full or in part and (iii) the liability for unrecognized tax benefits related to uncertain tax positions. Income tax expense is equal to the current year’s liability for income taxes and a provision for deferred income taxes. Deferred tax assets and liabilities are recorded for the future tax effects attributable to temporary differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using the enacted tax rates expected to be applied to taxable income in the years in which those temporary differences are expected to be recovered or settled. When it is more likely that all or some portion of specific deferred income tax assets will not be realized, a valuation allowance must be established for the amount of deferred income tax assets that are determined not to be realizable. A valuation allowance for deferred income tax assets has not been deemed necessary due to our profitable operations. Accordingly, if facts or financial circumstances change and consequently impact the likelihood of realizing the deferred income tax assets, we would need to apply management’s judgment to determine the amount of valuation allowance required in any given period.

These accounting policies and others are described in further detail in the notes to our audited consolidated financial statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, ~~2017.~~2018.

The preparation of financial statements in accordance with U.S. generally accepted accounting principles requires management to adopt accounting policies and make significant judgments and estimates to develop amounts reflected and disclosed in the consolidated financial statements. In many cases, there are alternative policies or estimation techniques that could be used. We maintain a thorough process to review the application of our accounting policies and to evaluate the appropriateness of the many estimates that are required to prepare the consolidated financial statements. However, even under optimal circumstances, estimates routinely require adjustment based on changing circumstances and the receipt of new or better information.

Item 3. Quantitative and Qualitative Disclosures About Market Risk

The Company is exposed to a variety of market risks including the effects of interest rates and fuel prices. The detail of the Company’s debt structure is more fully described in the notes to the consolidated financial statements set forth in the Company’s Annual Report on Form 10-K for the year ended December 31, ~~2017.~~2018. To help mitigate our risk to rising fuel prices, the Company has

implemented a fuel surcharge program. This program is well established within the industry and customer acceptance of fuel surcharges remains high. Since the amount of fuel surcharge is based on average national fuel prices and is reset weekly, exposure of the Company to fuel price volatility is significantly reduced. However, the fuel surcharge may not fully offset fuel price fluctuations during periods of rapid increases or decreases in the price of fuel and is also subject to overall competitive pricing negotiations.

The following table provides information about the Company’s third-party financial instruments as of ~~September~~June 30, ~~2018.~~2019. The table presents principal cash flows (in millions) and related weighted average interest rates by contractual maturity dates. The fair value of the variable and fixed rate debt (in millions) was estimated based upon levels one and two in the fair value hierarchy, respectively. The fair value of ~~capital~~finance leases is based on current market interest rates for similar types of financial instruments.

	Expected maturity date																		2018				Expected maturity date																		2019
	2018			2019			2020			2021			2022			Thereafter			Total		Fair Value		2019			2020			2021			2022			2023			Thereafter			Total		Fair Value
Fixed rate debt	$	4.4		$	17.8		$	18.4		$	19.5		$	18.6		$	27.6		$	106.3	$	105.3	$	9.4		$	19.3		$	20.5		$	19.4		$	14.4		$	15.9		$	98.9	$	98.2
Average interest rate		3.4	%		3.4	%		3.4	%		3.4	%		3.4	%		3.4	%						3.4	%		3.4	%		3.4	%		3.4	%		3.4	%		3.4	%
Variable rate debt	$	—		$	—		$	15.0		$	—		$	—		$	—		$	15.0	$	15.0	$	—		$	—		$	—		$	—		$	—		$	81.0		$	81.0	$	81.0
Average interest rate		—			—			3.5	%		—			—			—							—			—			—			—			—			3.6	%

As of the end of the period covered by this Quarterly Report on Form 10-Q, the Company conducted an evaluation of the effectiveness of the design and operation of its “disclosure controls and procedures” (Disclosure Controls). The Disclosure Controls evaluation was

performed under the supervision and with the participation of management, including the Company’s Chief Executive Officer (CEO) and Chief Financial Officer (CFO).

Based upon the controls evaluation, the Company’s CEO and CFO have concluded that, as of the end of the period covered by this Quarterly Report on Form 10-Q, the Company’s Disclosure Controls are effective to ensure that information the Company is required to disclose in reports that the Company files or submits under the Securities Exchange Act of 1934, as amended (the Exchange Act), is recorded, processed, summarized and reported within the time periods specified in SEC rules and forms.

During the period covered by this Quarterly Report on Form 10-Q, there were no changes in internal control over financial reporting that materially affected, or that are reasonably likely to materially affect, the Company’s internal control over financial reporting.

Attached as Exhibits 31.1 and 31.2 to this Quarterly Report on Form 10-Q are certifications of the CEO and the CFO, which are required in accordance with Rule 13a-14 of the Exchange Act. This Controls and Procedures section includes the information concerning the controls evaluation referred to in the certifications and it should be read in conjunction with the certifications.

Disclosure Controls are controls and procedures designed to ensure that information required to be disclosed in the Company’s reports filed under the Exchange Act is recorded, processed, summarized and reported timely. Disclosure Controls are also designed to ensure that such information is accumulated and communicated to the Company’s management, including the CEO and CFO, as appropriate to allow timely decisions regarding required disclosure. The Company’s Disclosure Controls include components of its internal control over financial reporting which consists of control processes designed to provide reasonable assurance regarding the reliability of the Company’s financial reporting and the preparation of financial statements in accordance with U.S. generally accepted accounting principles.

The Company’s management, including the CEO and CFO, does not expect that its Disclosure Controls or its internal control over financial reporting will prevent all errors and all fraud. A control system, no matter how well designed and operated, can provide only reasonable, not absolute, assurance that the control system’s objectives will be met. Further, the design of a control system must reflect the fact that there are resource constraints and the benefits of controls must be considered relative to their costs. Because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if any, within the Company have been detected. These inherent limitations include the realities that judgments in decision-making can be faulty and that breakdowns can occur because of simple error or mistake. Controls can also be circumvented by the individual acts of some persons, by collusion of two or more people or by management override of the controls. Because of the inherent limitations in a cost-effective control system, misstatements due to error or fraud may occur and not be detected.

Item 1. Legal Proceedings — For a description of all material pending legal proceedings, see Note 3 “Commitments and Contingencies” of the accompanying unaudited condensed consolidated financial statements.

Item 1A. Risk Factors — Risk Factors are described in Item 1A. “Risk Factors” of the Company’s Annual Report on Form 10-K for the year ended December 31, ~~2017~~2018 and there have been no material changes.

Issuer Purchases of Equity Securities

Period

(a) Total
Number of
Shares (or
Units)
Purchased (1)

(b) Average
Price Paid
per Share
(or Unit)

(c) Total Number
of Shares (or Units)
Purchased as Part
of Publicly
Announced Plans
or Programs

(d) Maximum
Number (or
Approximate Dollar
Value) of Shares (or
Units) that may Yet
be Purchased under
the Plans or Programs

July 1, 2018 through

July 31, 2018

—

(2)

$
—

(2)

—

$
—

August 1, 2018 through

August 31, 2018

—

(3)

$
—

(3)

—

—

September 1, 2018 through

September 30, 2018

750

(4)

$
76.30

(4)

—

—

Total

750

—

Issuer Purchases of Equity Securities
Period	(a) Total Number of Shares (or Units) Purchased (1)			(b) Average Price Paid per Share (or Unit)			(c) Total Number of Shares (or Units) Purchased as Part of Publicly Announced Plans or Programs		(d) Maximum Number (or Approximate Dollar Value) of Shares (or Units) that may Yet be Purchased under the Plans or Programs
April 1, 2019 through
April 30, 2019		—	(2)	$	—	(2)		—	$	—
May 1, 2019 through
May 31, 2019		3,530	(3)	$	64.84	(3)		—		—
June 1, 2019 through
June 30, 2019		—	(4)	$	—	(4)		—		—
Total		3,530						—

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Delaware		48-1229851
(State of incorporation)		(I.R.S. Employer Identification No.)

11465 Johns Creek Parkway, Suite 400
Johns Creek, GA		30097
(Address of principal executive offices)		(Zip Code)

		PAGE

PART I. FINANCIAL INFORMATION

ITEM 1:	Financial Statements	3

	Condensed Consolidated Balance Sheets as of ~~September~~June 30, ~~2018~~2019 and December 31, ~~2017~~2018	3

	Condensed Consolidated Statements of Operations for the ~~Quarters~~quarters and ~~Nine Months~~six months ended ~~September~~June 30, ~~2018~~2019 and ~~2017~~2018	4

	~~Condensed~~ Consolidated Statements of ~~Cash Flows~~Stockholders’ Equity for the ~~Nine Months~~three and six months ended ~~September~~June 30, ~~2018~~2019 and ~~2017~~2018	5

	~~Notes to~~ Condensed Consolidated ~~Financial~~ Statements of Cash Flows for the six months ended June 30, 2019 and 2018	6

	Notes to Condensed Consolidated Financial Statements	7

ITEM 2:	Management's Discussion and Analysis of Financial Condition and Results of Operations	1213

ITEM 3:	Quantitative and Qualitative Disclosures About Market Risk	2021

ITEM 4:	Controls and Procedures	21

PART II. OTHER INFORMATION

ITEM 1:	Legal Proceedings	22

~~ITEM 1A:~~	~~Risk Factors~~	22

~~ITEM 2:~~	~~Unregistered Sales of Equity Securities and Use of Proceeds~~	22

~~ITEM 3:~~	~~Defaults Upon Senior Securities~~	22

~~ITEM 4:~~	~~Mine Safety Disclosures~~	22

~~ITEM 5:~~	~~Other Information~~	22

~~ITEM 6:~~	~~Exhibits~~	23

ITEM 1A:	~~Signature~~Risk Factors	23

ITEM 2:	Unregistered Sales of Equity Securities and Use of Proceeds	23

ITEM 3:	Defaults Upon Senior Securities	23

ITEM 4:	Mine Safety Disclosures	23

ITEM 5:	Other Information	23

ITEM 6:	Exhibits	24

Signature		25

Workers’ compensation	$	1,000,000
Bodily injury and property damage (auto liability)		2,000,000
Employee medical and hospitalization		400,000
Cargo loss and damage		250,000

	Three Months Ended		Six Months Ended
	June 30, 2019		June 30, 2019
Lease Cost	(in thousands)

Finance Lease Cost:
Amortization of right-of-use assets	$	2,875	$	5,645
Interest on lease liabilities		987		1,787
Operating lease cost (includes variable and sublease costs as they are immaterial)		5,180		10,488
Short-term lease cost		1,473		2,453
Total lease cost	$	10,515	$	20,373

Other Information
Right-of-use assets obtained in exchange for new finance lease liabilities		5,058		5,058
Right-of-use assets obtained in exchange for new operating lease liabilities		2,248		5,266

	Six Months Ended
	June 30, 2019
	(in thousands)
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from finance leases		1,787
Operating cash flows from operating leases		11,019
Finance cash flows from finance leases		9,036
Weighted-average remaining lease term - finance leases (years)		4.5
Weighted-average remaining lease term - operating leases (years)		5.9
Weighted-average discount rate - finance leases		3.4	%
Weighted-average discount rate - operating leases		4.7	%


(Mark One)
☒	QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934


☐	TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

	As of December 31, 2017
		As adjusted		As originally reported		Effect of change
	(in thousands)
Accounts receivable		$	170,278	$	170,610	$	(332	)
Total current assets			203,249		203,581		(332	)
Total assets			967,315		967,647		(332	)
Accounts payable			57,438		57,717		(279	)
Total current liabilities			166,926		167,205		(279	)
Retained earnings			339,500		339,553		(53	)
Total stockholders’ equity			582,494		582,547		(53	)
Total liabilities and stockholders’ equity			967,315		967,647		(332	)

	For the quarter ended September 30, 2017								For the nine months ended September 30, 2017
		As adjusted		As originally reported		Effect of change				As adjusted		As originally reported		Effect of change
	(in thousands, except per share data)
Operating revenue		$	357,010	$	350,062	$	6,948			$	1,044,505	$	1,025,259	$	19,246
Purchased transportation			30,056		23,074		6,982				79,516		60,212		19,304
Total operating expenses			332,442		325,460		6,982				972,724		953,420		19,304
Operating income			24,568		24,602		(34	)			71,781		71,839		(58	)
Net income			14,373		14,407		(34	)			43,339		43,397		(58	)
Basic Earnings Per Share			0.56		0.56		—				1.70		1.70		—
Diluted Earnings Per Share			0.55		0.55		—				1.67		1.67		—

Maturity of Lease Liabilities (in thousands)	Operating Leases		Finance Leases
2019	$	11,540	$	11,034
2020		18,827		22,068
2021		15,669		22,593
2022		12,450		20,857
2023		8,930		15,278
Thereafter		23,451		16,532
Total lease payments		90,867		108,362
Less: Interest		17,986		9,481
Present value of lease liabilities	$	72,881	$	98,881

	Amount
2019	$	21,285
2020		16,978
2021		14,159
2022		11,482
2023		8,215
Thereafter		22,531
Total	$	94,650

(1)	Shares purchased by the Saia, Inc. Executive Capital Accumulation Plan were open market purchases. For more information on the Saia, Inc. Executive Capital Accumulation Plan, see the Registration Statement on Form S-8 (No. 333-155805) filed on December 1, 2008.
(2)	The Saia, Inc. Executive Capital Accumulation Plan ~~sold 15,582 shares~~had no sales of Saia stock ~~at an average price of $79.67~~ during the period of ~~July~~April 1, ~~2018~~2019 through ~~July 31, 2018.~~April 30, 2019.
(3)	The Saia, Inc. Executive Capital Accumulation Plan had no sales of Saia ~~stock~~Stock during the period of ~~August~~May 1, ~~2018~~2019 through ~~August~~May 31, ~~2018.~~2019.
(4)	The Saia, Inc. Executive Capital Accumulation Plan had no sales of Saia stock during the period of ~~September~~June 1, ~~2018~~2019 through ~~September~~June 30, ~~2018.~~2019.

Exhibit
Number		Description of Exhibit

3.1		Restated Certificate of Incorporation of Saia, Inc., as amended (incorporated herein by reference to Exhibit 3.1 of Saia, Inc.’s Form 8-K (File No. 0-49983) filed on July 26, 2006).

3.2		Amended and Restated By-laws of Saia, Inc. (incorporated herein by reference to Exhibit 3.1 of Saia, Inc.’s Form 8-K (File No. 0-49983) filed on July 29, 2008).

3.3		Certificate of Elimination filed with the Delaware Secretary of State on December 16, 2010 (incorporated herein by reference to Exhibit 3.1 of Saia, Inc.’s Form 8-K (File No. 0-49983) filed on December 20, 2010).

10.1		Executive Severance Agreement between Robert S. Chambers, and Saia, Inc. dated as of May 6, 2019 (incorporated herein by reference to Exhibit 10.1 of Saia, Inc.’s Form 8-K (File No. 0-49983) filed on May 6, 2019).

10.2		Severance Agreement between Robert S. Chambers, and Saia, Inc. dated as of May 6, 2019 (incorporated herein by reference to Exhibit 10.2 of Saia, Inc.’s Form 8-K (File No. 0-49983) filed on May 6, 2019).

10.3		Restricted Stock Agreement under the Saia, Inc. 2018 Omnibus Incentive Plan between Robert S. Chambers, and Saia, Inc. dated as of May 6, 2019 (incorporated herein by reference to Exhibit 10.3 of Saia, Inc.’s Form 8-K (File No. 0-49983) filed on May 6, 2019).

31.1		Certification of Principal Executive Officer Pursuant to Exchange Act Rule 13a-15(e)..

31.2		Certification of Principal Financial Officer Pursuant to Exchange Act Rule 13a-15(e)..

32.1		Certification of Principal Executive Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of ~~2002~~.2002.

32.2		Certification of Principal Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of ~~2002~~.2002.

101		The following financial information from Saia, Inc.’s Quarterly Report on Form 10-Q for the quarter ended ~~September~~June 30, ~~2018,~~2019, formatted in XBRL (Extensible Business Reporting Language) includes: (i) Condensed Consolidated Balance Sheets as of ~~September~~June 30, ~~2018~~2019 and December 31, ~~2017~~2018 (unaudited), (ii) Condensed Consolidated Statements of Operations for the quarters and ~~nine~~six months ended ~~September~~June 30, ~~2018~~2019 and ~~2017~~2018 (unaudited), (iii) Consolidated Statements of Stockholders’ Equity for the three and six months ended June 30, 2019 and 2018 (unaudited), (iv) Condensed Consolidated Statements of Cash Flows for the ~~nine~~six months ended ~~September~~June 30, ~~2018~~2019 and ~~2017~~2018 (unaudited), and ~~(iv)~~(v) the Notes to Condensed Consolidated Financial Statements (unaudited). XBRL Instance Document – the XBRL Instance Document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.

	SAIA, INC.

Date: ~~October~~July 31, ~~2018~~2019		/s/ Frederick J. Holzgrefe, III
		Frederick J. Holzgrefe, III
		~~Executive Vice~~ President and Chief Operating Officer
		~~Chief Financial Officer~~