As filed with the Securities and Exchange Commission on December 20, 2018January 16, 2019

RegistrationNo. 333-          

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FormS-3

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

Par Pacific Holdings, Inc.

(Exact name of registrant as specified in its charter)

825 Town & Country Lane, Suite 1500

Houston, Texas 77024

(281)899-4800

(Address, including zip code, and telephone number, including area code, of registrant’s principal executive offices)

J. Matthew Vaughn

Senior Vice President and General Counsel

Par Pacific Holdings, Inc.

825 Town & Country Lane, Suite 1500

Houston, Texas 77024

(281) 899-4800

(Name, address, including zip code, and telephone number, including area code, of agent for service)

Copies to:

E. James Cowen

Porter Hedges LLP

1000 Main, 36th Floor

Houston, Texas 77002

Telephone: (713)226-6649

Telecopy: (713)228-1331

Approximate date of commencement of proposed sale to the public:public: From time to time after this registration statement becomes effective.

If the only securities being registered on this Form are being offered pursuant to dividend or interest reinvestment plans, please check the following box.  ☐

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, other than securities offered only in connection with dividend or interest reinvestment plans, check the following box.  ☒

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.  ☐

If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.  ☐

If this Form is a registration statement pursuant to General Instruction I.D. or a post-effective amendment thereto that shall become effective upon filing with the Commission pursuant to Rule 462(e) under the Securities Act, check the following box.  ☐

If this Form is a post-effective amendment to a registration statement filed pursuant to General Instruction I.D. filed to register additional securities or additional classes of securities pursuant to Rule 413(b) under the Securities Act, check the following box.  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, anon-accelerated filer, a 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 Rule12b-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 7(a)(2)(B)(b) of the ExchangeSecurities Act.  ☐

CALCULATION OF REGISTRATION FEE

The registrant hereby amends this Registration Statement on such date or dates as may be necessary to delay its effective date until the registrant shall file a further amendment which specifically states that this Registration Statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act of 1933 or until the Registration Statement shall become effective on such date as the Commission acting pursuant to said Section 8(a), may determine.

The information in this prospectus is not complete and may be changed. These securities may not be sold until the registration statement filed with the Securities and Exchange Commission is effective. This prospectus is not an offer to sell these securities and it is not soliciting an offer to buy these securities in any state where the offer or sale is not permitted.

SUBJECT TO COMPLETION, DATED DECEMBER 20, 2018JANUARY 16, 2019

PROSPECTUS

1,108,2022,363,776 Shares of Common Stock

This prospectus relates to the offer and resale by the selling security holder identified in this prospectus of 1,108,2022,363,776 shares of our common stock (the “Consideration Shares”). The Consideration Shares were issued to the security holder as partial consideration for our acquisition of the equity interests in Eagle Island,TrailStone NA Asset Finance I, LLC in a private placement transaction in reliance upon an exemption from registration pursuant to Section 4(a)(2) of the Securities Act of 1933, as amended (the “Securities Act”).

The selling security holder identified in this prospectus (which term as used in this prospectus includes its respective pledges, donees, transferees or othersuccessors-in-interest) may offer this common stock from time to time through public or private transactions at prevailing market prices, at prices related to prevailing market prices or at privately negotiated prices.

Although we will incur expenses in connection with the registration of the securities, we will not receive any of the proceeds from the sale of the shares of common stock by the selling security holder.

In order to avoid an “ownership change” for federal income tax purposes, our certificate of incorporation prohibits any person from becoming a holder of 5% or more of our outstanding common stock, and restricts the ability of any holder of 5% or more of our common stock from disposing of or acquiring shares of our common stock without our consent, except under limited circumstances. Consequently, there are limitations on the acquisition of shares of common stock as described in this prospectus.

Our common stock is quoted on the New York Stock Exchange (the “NYSE”) under the symbol “PARR.” The last reported sale price of our common stock on December 19, 2018January 14, 2019 was $14.42$15.82 per share.

AN INVESTMENT IN OUR COMMON STOCK INVOLVES RISK. YOU SHOULD CONSIDER CAREFULLY THERISK FACTORS BEGINNING ON PAGE 5 OF THIS PROSPECTUS BEFORE PURCHASING SHARES OF OUR COMMON STOCK.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities, or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

The date of this prospectus is                , 20182019

TABLE OF CONTENTS

i

About this Prospectus

This prospectus forms a part of a registration statement on FormS-3 that we filed with the Securities and Exchange Commission (the “SEC”). The selling security holder may sell from time to time the securities described in this prospectus in one or more offerings. Each time the selling security holder sells securities, the selling security holder may be required to provide you with this prospectus. The selling security holder may deliver a prospectus supplement with this prospectus, to the extent appropriate, to update the information contained in this prospectus.

You should rely only on the information contained in or incorporated by reference into this prospectus.prospectus and any prospectus supplement. We have not authorized anyone to provide you with additional or different information. The selling security holder is offering to sell, and seeking offers to buy, shares of common stock only in jurisdictions where offers and sales are permitted.

This prospectus contains forward-looking statements that are subject to a number of risks and uncertainties, many of which are beyond our control. Please read “Risk Factors” and “Cautionary Note Regarding Forward-Looking Statements.”

Industry and Market Data

The market data and certain other statistical information contained in or incorporated by reference into this prospectus are based on independent industry publications, government publications or other published independent sources. Although we believe these third-party sources are reliable and that the information is accurate and complete, we have not independently verified the information nor have we ascertained the underlying economic or operational assumptions relied upon therein.

RISK FACTORS

Investing in shares of our common stock involves a high degree of risk. Before investing, you should consider carefully the risks described below, together with the other information contained in this prospectus and in any prospectus supplement, including the risk factors incorporated by reference from our Annual Report on Form10-K for the year ended December 31, 2017 and other filings we make with the SEC. The risks and uncertainties we described below are not the only ones we face. Additional risks and uncertainties not presently known to us or that we currently deem immaterial may also affect our operations. If any of these risks actually occurs, our business, results of operations and financial condition could suffer, and you could lose your investment in us.

Risks Related to the Acquisitions

The USOR Acquisition may not close as anticipated.

The USOR Acquisition is expected to close in January of 2019, subject to the satisfaction of certain closing conditions. If those conditions are not satisfied or waived, the USOR Acquisition will not be consummated. Certain of the conditions that remain to be satisfied with respect to the USOR Acquisition include, but are not limited to:

In addition, we and the Trailstone Seller can mutually agree to terminate the USOR Purchase Agreement without completing the USOR Acquisition. Further, under the terms of the USOR Purchase Agreement, we or the Trailstone Seller can unilaterally terminate the USOR Purchase Agreement without the other party’s agreement and without completing the transactions contemplated thereunder upon the occurrence of certain events.

We cannot assure you that the USOR Acquisition will close on our expected timeframe, or at all, or close without material adjustment.

We may fail to successfully integrate the Topping Units or the Pacific Northwest Refinery and Logistics Business with our existing business in a timely manner, which could have a material adverse effect on our business, financial condition, results of operations or cash flows, or we may fail to realize all of the expected benefits of the Acquisitions, which could negatively impact our future results of operations.

Integration of the Topping Units and the Pacific Northwest Refinery and Logistics Business with our existing business will be a complex, time-consuming and costly process. A failure to successfully integrate the Topping Units and the Pacific Northwest Refinery and Logistics Business with our existing business in a timely manner may have a material adverse effect on our business, financial condition, results of operations or cash flows. The difficulties of combining the Topping Units and Pacific Northwest Refinery and Logistics Business with our existing operations include, among other things:

Flaws in our ongoing due diligence in connection with the Acquisitions could have a significant negative effect on our financial condition and results of operations.

We conducted limited due diligence in connection with the Acquisitions prior to signing the Acquisition Agreements and are continuing to conduct due diligence during the period between the signing and closing of the USOR Acquisition.Agreements. Intensive due diligence is time consuming and expensive due to the operations, accounting, finance and legal professionals who must be involved in the due diligence process and the fact that such efforts do not always lead to a consummated transaction. Diligence may not reveal all material issues that may affect the Topping Units, Trailstone or the Pacific Northwest Refinery and Logistics Business. In addition, factors outside of our control may later arise. If, during the diligence process, we fail to identify issues specific to the Topping Units, Trailstone or the Pacific Northwest Refinery and Logistics Business, we may be forced to later write down or write off assets, restructure our operations, or incur impairment or other charges that could result in other reporting losses. We cannot assure you that we will not have to take write-downs or write-offs in connection with the acquisitions of certain of the assets and assumption of certain liabilities of the Topping Units, Trailstone or the Pacific Northwest Refinery and Logistics Business, which could have a negative effect on our financial condition and results of operation following closing.

Financing the USOR Acquisition will substantially increaseincreased our outstanding indebtedness.

We intend to fundfunded the cash purchase price for the USOR Acquisition with a combination of equitydebt financing, a new secured term loan facility, and cash on hand. After giving effect to these transactions, including the payment of the USOR Acquisition purchase price and related expenses, we expectAt September 30, 2018, the principal amount of our outstanding indebtedness to increase fromwas $415 million. On January 11, 2019, in connection with the USOR Acquisition, we entered into a $250 million asterm loan facility with Goldman Sachs Bank USA and a $45 million term loan with Bank of September 30, 2018 to approximately $665 million.Hawaii. Additionally, the USOR Intermediation Agreement was amended and remained in place at the closing of the USOR Acquisition. This increase in our indebtedness may reduce our flexibility to respond to changing business and economic conditions or to fund capital expenditure or working capital needs because we will require additional funds to service our outstanding

spread”) also fluctuates significantly. These prices we pay and prices we receive depend on numerous factors beyond our control, including the global supply and demand for crude oil, gasoline and other refined products, which are subject to, among other things:

In addition, we purchase our refinery feedstocks before manufacturing and selling the refined products. Price level changes during the period between purchasing feedstocks and selling the manufactured refined products from these feedstocks could have a significant impact on our financial results. We also purchase refined products manufactured by others for sale to our customers. Price level changes during the periods between purchasing and selling these refined products could also have a material adverse effect on our business, financial condition, results of operations or cash flows.

Trailstone is particularly vulnerable to disruptions to our refining operations because its refining operations are concentrated in one facility.

Because all of Trailstone’s refining operations are concentrated in the Tacoma refinery, a significant disruption at the Tacoma facility could have a material adverse effect on our business, financial condition or results of operations.

The Tacoma refinery may require unscheduled down time for unanticipated maintenance or repairs that are more frequent than our scheduled turnarounds. Refinery operations may also be disrupted by external factors such as a suspension of feedstock deliveries or an interruption of electricity, natural gas, water treatment or other utilities. Other potentially disruptive factors include natural disasters, severe weather conditions, workplace or environmental accidents, interruptions of supply, work stoppages, increases in the cost of crude supplies, losses of permits or authorizations or acts of terrorism. Disruptions to our refining operations could reduce our revenues during the period of time that our processing units are not operating. For example, the Tacoma refinery sources crude from, among other locations, Western Canada, where the Albertan government recently announced that it will decrease oil production in 2019 to reduce price differentials. This action, or any similar actions, could result in an increase in the price we pay for crude oil, which may result in a decrease in the expected earnings and cash flows generated by the Tacoma refinery.

If securities or industry analysts do not publish research or reports about our business, if they adversely change their recommendations regarding our common stock or if our operating results do not meet their expectations, our stock price could decline.

The trading market for our common stock is influenced by the research and reports that industry or securities analysts publish about us or our business. If one or more of these analysts cease coverage of our company or fail to publish reports on us regularly, we could lose visibility in the financial markets, which in turn could cause our stock price or trading volume to decline. Moreover, if one or more of the analysts who cover our company downgrades our common stock or if our operating results do not meet their expectations, our stock price could decline.

The price of our common stock historically has been volatile. This volatility may affect the price at which you could sell your common stock.

The market price for our common stock has varied between a high of $21.34 on August 30, 2018, and a low of $16.10$13.68 on November 12,December 26, 2018, during the twelve month period ended November 30,December 31, 2018. This volatility may affect the price at which you could sell your common stock. Our stock price is likely to continue to be volatile and subject to significant price and volume fluctuations in response to market and other factors; variations in our quarterly operating results from our expectations or those of securities analysts or investors; downward revisions in securities analysts’ estimates; and announcement by us or our competitors of significant acquisitions, strategic partnerships, joint ventures, or capital commitments.

The market for our common stock has been historically illiquid, which may affect your ability to sell your shares.

The volume of trading in our common stock has historically been low. In addition, a substantial amount of our common stock is heldbeneficially owned by two investors who have restrictions on their ability to sell the stock.three investors. The lack of substantial liquidity can adversely affect the price of our stock at a time when you might want to sell your shares. There is no guarantee that an active trading market for our common stock will develop or be maintained on the NYSE, or that the volume of trading will be sufficient to allow for timely trades. Investors may not be able to sell their shares quickly or at the latest market price if trading in our stock is not active or if trading volume is limited. In addition, if trading volume in our common stock is limited, trades of relatively small numbers of shares may have a disproportionate effect on the market price of our common stock.

Delaware law, our charter documents and concentrated stock ownership may impede or discourage a takeover, which could reduce the market price of our common stock.

We are a Delaware corporation and the anti-takeover provisions of Delaware law impose various impediments to the ability of a third party to acquire control of us, even if a change in control would be beneficial to our existing stockholders. For example, the change in ownership limitations contained in Article 11 of our

We may issue preferred stock with terms that could adversely affect the voting power or value of our common stock.

Our certificate of incorporation authorizes us to issue, without the approval of our stockholders, one or more classes or series of preferred stock having such designations, preferences, limitations, and relative rights, including preferences over our common stock respecting dividends and distributions, as our board of directors may determine. The terms of one or more classes or series of preferred stock could adversely impact the voting power or value of our common stock. For example, we might grant holders of preferred stock the right to elect some number of our directors in all events or on the happening of specified events or the right to veto specified transactions. Similarly, the repurchase or redemption rights or liquidation preferences we might assign to holders of preferred stock could adversely affect the residual value of the common stock.

We expect to issue shares of our common stock in connection with the closing of our USOR Acquisition and we may issue shares of common stock in satisfaction of general unsecured claims from our predecessor’s bankruptcy that would dilute your ownership of our common stock.

We expect to issue shares of our common stock in connection with the closing of our USOR Acquisition, which amount could represent up to 19.9% of our issued and outstanding stock as of November 26, 2018. In addition, in December 2011 and January 2012, Delta Petroleum Corporation and its subsidiaries filed voluntary petitions under Chapter 11 of the U.S. Bankruptcy Code in the U.S. Bankruptcy Court for the District of Delaware, and in March 2012, obtained approval from the bankruptcy court to proceed with a plan of reorganization. Pursuant to this plan, among other things, certain allowed general unsecured claims may be paid with shares of our common stock. As of September 30, 2018, two claims totaling approximately $22.4 million remain to be resolved and we have reserved approximately $0.5 million representing the estimated value of claims remaining to be settled which are deemed probable and estimable at period end. The settlement of claims is subject to ongoing litigation and we are unable to predict with certainty how many shares will be required to satisfy all claims. Pursuant to the plan of reorganization, allowed claims are settled at a ratio of 54.4 shares per $1,000 of claim. Any issuances by us of common stock in connection with our USOR Acquisition or to satisfy claims would have a dilutive impact on the ownership interest of existing common stockholders and could cause the market price of our common stock to decline.

Future sales of our common stock could reduce our stock price, and any additional capital raised by us through the sale of equity or convertible securities may dilute your ownership in us.

We are not restricted from issuing additional shares of common stock, including shares issuable pursuant to securities that are convertible into or exchangeable for, or that represent the right to receive, common stock. We have approximately 45.947.0 million shares of common stock outstanding as of December 1,31, 2018.

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

Certain statements in this prospectus and in the documents we incorporate by reference herein may constitute “forward-looking” statements as defined in Section 27A of the Securities Act, Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), the Private Securities Litigation Reform Act of 1995 (“PSLRA”), or in releases made by the SEC, all as may be amended from time to time. Such forward-looking statements involve known and unknown risks, uncertainties and other important factors that could cause our actual results, performance or achievements of to differ materially from any future results, performance or achievements expressed or implied by such forward-looking statements. Statements that are not historical fact are forward-looking statements. Forward-looking statements can be identified by, among other things, the use of forward-looking language, such as the words “plan,” “believe,” “expect,” “anticipate,” “intend,” “estimate,” “project,” “may,” “will,” “would,” “could,” “should,” “seeks,” “scheduled to,” or other similar words, or the negative of these words or other variations of these words or comparable language, or by discussion of strategy or intentions. These cautionary statements are being made pursuant to the Securities Act, the Exchange Act and the PSLRA with the intention of obtaining the benefits of the “safe harbor” provisions of such laws. When considering these forward-looking statements, you should keep in mind the risk factors and other cautionary statements included in this prospectus, any prospectus supplement and the documents we incorporate by reference herein. Please read “Risk Factors” beginning on page 5 of this prospectus.prospectus and in any prospectus supplement. The risk factors and other factors noted throughout this prospectus, any prospectus supplement and in the documents incorporated by reference could cause our actual results to differ materially from those contained in any forward-looking statement.

The forward-looking statements contained in this prospectus, any prospectus supplement and in the documents we incorporate herein by reference are largely based on our expectations, which reflect estimates and assumptions made by our management. These estimates and assumptions reflect our best judgment based on currently known market conditions and other factors. Although we believe such estimates and assumptions to be reasonable, they are inherently uncertain and involve a number of risks and uncertainties that are beyond our control. In addition, management’s assumptions about future events may prove to be inaccurate. All readers are cautioned that the forward-looking statements contained in this prospectus, any prospectus supplement and in the documents we incorporate herein by reference are not guarantees of future performance, and we cannot assure any reader that such statements will be realized or that the forward-looking events and circumstances will occur. Actual results may differ materially from those anticipated or implied in the forward-looking statements due to factors described under the heading “Risk Factors” in this prospectus, any prospectus supplement and elsewhere in the documents we incorporate herein by reference. All forward-looking statements speak only as of the date they are made. We do not intend to update or revise any forward-looking statements as a result of new information, future events or otherwise. These cautionary statements qualify all forward-looking statements attributable to us or persons acting on our behalf.

USE OF PROCEEDS

We will not receive any proceeds from the sale of shares by the selling security holder. The selling security holder named in this prospectus will pay any underwriting fees, discounts and commissions, along with certain of the selling security holder’sout-of-pocket expenses, incurred in connection with their sale of shares registered under this prospectus. We will bear all other costs, fees and expenses incurred by us, or by the selling security holder, in effecting the registration, offer and sale of the shares covered by this prospectus.

SELLING SECURITY HOLDERS

The following table sets forth information relating to the selling security holder’s beneficial ownership of our shares as of December 1,31, 2018. This prospectus covers the offering for resale from time to time of up to 1,108,2022,363,776 shares owned by the selling security holder. The 1,108,2022,363,776 shares were issued to the selling security holder at the closing of the EagleUSOR Acquisition.

As used herein, the “selling security holder” includes any pledgees, donees, transferees or othersuccessors-in-interest selling shares received from the named selling security holder after the date of this prospectus.

No offer or sale under this prospectus may be made by a stockholderselling security holder unless that holder is listed in the table below, in a supplement to this prospectus or in an amendment to the related registration statement that has become effective under the Securities Act. We will supplement or amend this prospectus to include additional selling security holders upon request and upon provision of all required information to us, subject to the terms of the Topping UnitUSOR Registration Rights Agreement, as described under the “Description of Capital Stock – Stock—Registration Rights Agreements – Topping UnitAgreements—USOR Registration Rights Agreement.”

The following table and related footnotes set forth:

Unless otherwise indicated, the selling security holder is not a broker-dealer registered under Section 15 of the Exchange Act, or an affiliate of a broker-dealer registered under Section 15 of the Exchange Act.

We prepared the table based on information supplied to us by the selling security holder. We have not sought to verify such information. The percentages of shares beneficially owned and being offered are based on the number of shares that were outstanding as of December 1,31, 2018, unless otherwise stated in the footnotes to the table below. Additionally, the selling security holder may have sold or transferred some or all of their shares in exempt ornon-exempt transactions since such date. Other information about the selling security holder may also change over time.

PLAN OF DISTRIBUTION

The selling security holder and any of its pledgees, donees, transferees or othersuccessors-in-interest may, from time to time, sell any or all of their shares of common stock offered by this prospectus on the NYSE or any other stock exchange, market or trading facility on which the shares are traded or in private transactions. These sales may be at fixed prices, the prevailing market prices or negotiated prices. The selling security holder may use any one or more of the following methods when selling such shares:

The selling security holder may also sell shares under Rule 144 under the Securities Act, if available, rather than under this prospectus. To the extent required, this prospectus may be amended and/or supplemented from time to time to describe a specific plan of distribution.

The shares may be sold directly or through broker-dealers acting as principal or agent, or pursuant to a distribution by one or more underwriters on a firm commitment or best-efforts basis. Broker-dealers and underwriters engaged by the selling security holder may arrange for other broker-dealers and underwriters to participate in sales. Broker-dealers and underwriters may receive commissions or discounts from the selling security holder (or, if any broker-dealer or underwriter acts as agent for the purchaser of shares, from the purchaser) in amounts to be negotiated, but, except as set forth in a supplement to this prospectus, in the case of any agency transaction not in excess of a customary brokerage commission in compliance with Financial Industry Regulatory Authority Rule 2121 (“Rule 2121”), and, in the case of a principal transaction a markup or markdown in compliance with Rule 2121.

In connection with the sale of the common stock or interests therein, the selling security holder may enter into hedging transactions with broker-dealers or other financial institutions, which may in turn engage in short sales of the common stock in the course of hedging the positions they assume. The selling security holder may also sell common stock short and deliver these securities to close out its short positions, or loan or pledge the common stock to broker-dealers that in turn may sell these securities. The selling security holder may also enter into option or other transactions with broker-dealers or other financial institutions or the creation of one or more derivative securities which require the delivery to such broker-dealer or other financial institution of shares offered by this prospectus, which shares such broker-dealer or other financial institution may resell pursuant to this prospectus (as supplemented or amended to reflect such transaction). Notwithstanding the foregoing, the

selling security holder has been advised that it may not use shares registered on the registration statement of which this prospectus forms a part to cover short sales of our common stock made prior to the date such registration statement has been declared effective by the SEC.

The selling security holder may, from time to time, pledge or grant a security interest in some or all of the shares of common stock owned by it and, if it defaults in the performance of its secured obligations, the pledgees

state securities or “blue sky” laws; provided, however, that the selling security holder will pay all underwriting discounts and selling commissions, if any. We will indemnify the selling security holder against certain liabilities, including some liabilities under the Securities Act, in accordance with the Topping UnitUSOR Registration Rights Agreement. We may be indemnified by the selling security holder against civil liabilities, including liabilities under the Securities Act that may arise from any written information furnished to us by the selling security holder specifically for use in this prospectus, in accordance with the Topping UnitUSOR Registration Rights Agreement.

DESCRIPTION OF CAPITAL STOCK

As of December 1,31, 2018, our authorized capital consisted of 500,000,000 shares of voting common stock, of which approximately 45.947.0 million shares were issued and outstanding, and 3,000,000 shares of undesignated preferred stock, none of which were outstanding.

In the discussion that follows, we have summarized selected provisions of our certificate of incorporation, bylaws and stockholders agreement, as well as the Warrant Issuance Agreement and Registration Rights Agreement (each as defined below) relating to our capital stock, as well as the registration rights agreement (the “Convertible Notes Registration Rights Agreement”) with respect to the issuance (the “Convertible Notes Offering”) of our 5.00% convertible senior notes due 2021 (the “Convertible Notes”), the registration rights agreement (the “Bridge Notes Registration Rights Agreement”) with respect to the issuance of the 2.50% convertible subordinated bridge notes on September 23, 2016 (the “Bridge Notes”) and, the registration rights agreement with respect to the Topping Unit Acquisition (the “Topping Unit Registration Rights Agreement”), and the registration rights agreement with respect to the USOR Acquisition (the “USOR Registration Rights Agreement”). You should read our certificate of incorporation, bylaws, stockholders agreement, Warrant Issuance Agreement, Registration Rights Agreement, Convertible Notes Registration Rights Agreement, Bridge Notes Registration Rights Agreement, and Topping Unit Registration Rights Agreement and USOR Registration Rights Agreement as currently in effect for more details regarding the provisions we describe below and for other provisions that may be important to you. We have filed copies of those documents with the SEC, and they are incorporated by reference herein. Please read “Where You Can Find More Information.”

Common Stock

Holders of our common stock are entitled to one vote per share in the election of directors and on all other matters submitted to a vote of stockholders. Such holders do not have the right to cumulate their votes in the election of directors. Holders of our common stock have no redemption or conversion rights, no preemptive or other rights to subscribe for our securities and are not entitled to the benefits of any sinking fund provisions. In the event of our liquidation, dissolution orwinding-up, holders of our common stock are entitled to share equally and ratably in all of the assets remaining, if any, after satisfaction of all our debts and liabilities, and of the preferential rights of any series of preferred stock then outstanding. Subject to preferences that may be applicable to any then outstanding preferred stock, holders of our common stock are entitled to receive dividends when, as and if declared by the Board out of funds legally available therefor.

Our certificate of incorporation contains restrictions on the transfer of the Company Securities (as defined therein, and which includes our common stock) by holders who are, or would become as a result of such transfer, a holder of at least 5% of our common stock (a “5% Shareholder”). Such restrictions were put in place in order to preserve our net operating loss carryovers, capital loss carryovers, general business credit carryovers, alternative minimum tax credit carryovers and foreign tax credit carryovers, as well as any “net unrealizedbuilt-in loss” within the meaning of Section 382 of the Internal Revenue Code of 1986, as amended.

On November 10, 2014, as permitted by the terms of Article 11 of our certificate of incorporation, we entered into the Allocation Agreement with ZCOF, ZCOF Par Petroleum Holdings, L.L.C. and Whitebox Multi-Strategy Partners, L.P. to reallocate the proportionate amount of our common stock that the 5% Shareholders are permitted to transfer among our remaining 5% Shareholders. In accordance with Article 11 of our certificate of incorporation, the Board has approved, on a prospective basis, one or more Transfers (as defined in our certificate of incorporation) of shares of our common stock by the remaining 5% Shareholders up to the new allocation amounts included on a schedule to the Allocation Agreement.

Warrants

On August 31, 2012, pursuant to the terms of a warrant issuance agreement (the “Warrant Issuance Agreement”), we issued warrants (the “Warrants”) to purchase up to an aggregate of 959,213 shares (the

“Warrant Shares”) of our common stock. The holders of the Warrants are entitled to purchase Warrant Shares at an exercise price of $0.09 per share, subject to certain adjustments from time to time. The Warrants expire on the earlier of August 31, 2022 or the occurrence of certain merger or consolidation transactions. At September 30,December 31, 2018, Warrants to purchase an aggregate of 354,350 Warrant Shares were outstanding.

The number of shares of our common stock issuable upon exercise of the Warrants and the exercise prices of the Warrants will be adjusted in connection with certain issuances or sales of shares of our common stock and convertible securities, or any subdivision, reclassification or combinations of common stock, as set forth in the Warrant Issuance Agreement. Additionally, in the case of any reclassification or capital reorganization of our capital stock, the holder of each Warrant outstanding immediately prior to the occurrence of such reclassification or reorganization shall have the right to receive upon exercise of the applicable Warrant, the kind and amount of stock, other securities, cash or other property that such holder would have received if such Warrant had been exercised.

Preferred Stock

The Board is authorized to establish one or more series of preferred stock and to determine, with respect to any series of preferred stock, the powers, designation, preferences and rights of each series and the qualifications, limitations or restrictions of each series, including:

The authorized shares of preferred stock, as well as shares of common stock, are available for issuance without further action by our stockholders, unless stockholder action is required by the rules of any stock exchange or automated quotation system on which our securities are listed or traded. If the approval of our stockholders is not required for the issuance of shares of preferred stock or common stock, the Board may determine not to seek stockholder approval.

Although the Board has no intention at the present time of doing so, it could issue a series of preferred stock that could, depending on the terms of that series, impede the completion of a merger, tender offer or other takeover attempt. The Board will make any determination to issue shares based on its judgment as to our best interests and the best interests of our stockholders. The Board, in so acting, could issue preferred stock having terms that could discourage an acquisition attempt, including a tender offer or other transaction that some, or a majority of, our stockholders might believe to be in their best interests or that might result in stockholders receiving a premium for their stock over the then current market price of the stock.

Anti-Takeover Provisions

As noted above, because our stockholders do not have cumulative voting rights, stockholders holding a majority of the shares of common stock outstanding will be able to elect all of our directors. Our certificate of incorporation and our bylaws provide that only the chairman of the Board, the chief executive officer, or any officer upon the written request of a majority of the Board, may call a special meeting of the stockholders.

Our certificate of incorporation requires a 66 2/3% stockholder vote for the amendment or repeal of certain provisions of the certificate of incorporation relating to the liability of directors, indemnification of officers and directors, and the transfer restrictions noted above. Our bylaws require a 66 2/3% stockholder vote for the amendment or repeal of certain provisions of the bylaws. The combination of the lack of cumulative voting and the 66 2/3% stockholder voting requirements will make it more difficult for existing stockholders to replace the Board as well as for another party to obtain control of us by replacing the Board. Because the Board has the power to retain and discharge our officers, these provisions could also make it more difficult for existing stockholders or another party to effect a change in management. In addition, the authorization of undesignated preferred stock makes it possible for the Board to issue preferred stock with voting or other rights or preferences that could impede the success of any attempt to change control of us.

These provisions may have the effect of deterring hostile takeovers or delaying changes in control or management of us. These provisions are intended to enhance the likelihood of continued stability in the composition of the Board and its policies and to discourage certain types of transactions that may involve an actual or threatened acquisition of us. These provisions are designed to reduce our vulnerability to an unsolicited acquisition proposal. The provisions also are intended to discourage certain tactics that may be used in proxy fights. However, such provisions could have the effect of discouraging others from making tender offers for our shares and, as a consequence, they also may inhibit fluctuations in the market price of our shares that could result from actual or rumored takeover attempts. Such provisions may also have the effect of preventing changes in our management.

As noted above, our certificate of incorporation contains restrictions on the transfer of Company Securities by holders who are, or would become as a result of such transfer, 5% Shareholders. These restrictions on transfer may have the effect of preserving effective control of us by our principal stockholders and preserving the tenure of the board of directors and management.

In addition, we are subject to Section 203 of the Delaware General Corporation Law (the “DGCL”) which prohibits a Delaware corporation from engaging in any business combination with any interested stockholder for a period of three years after the date that such stockholder became an interested stockholder, with the following exceptions:

In general, Section 203 of the DGCL defines business combination to include the following:

In general, Section 203 of the DGCL defines an “interested stockholder” as an entity or person who, together with the person’s affiliates and associates, beneficially owns, or is an affiliate or associate of the corporation and within three years prior to the time of determination of interested stockholder status did own, 15% or more of the outstanding voting stock of the corporation.

Stockholders Agreement

We entered into a stockholders agreement in April 2015 for the benefit of the holders of any of our securities entitled to vote for members of the Board providing that in the event that we are no longer required to file annual and quarterly reports with the SEC, we will provide, as soon as reasonably practicable, comparable audited reports on an annual basis, unaudited reports on a quarterly basis (which annual and quarterly reports shall contain substantially similar descriptions of business and management discussion and analysis provisions as are then required to be included in relevant filings with the SEC), and earnings releases on a quarterly basis, made available to such holders through a secure website and subject to a standard click-through access and confidentiality agreement.

Registration Rights Agreements

Registration Rights Agreement

The company and certain of our stockholders (the “Rights Holders”), including affiliates of ZCOF and Whitebox, are parties to a registration rights agreement (the “Registration Rights Agreement”) providing the Rights Holders with certain registration rights.

Pursuant to the Registration Rights Agreement, among other things, any Rights Holder or group of Rights Holders that, together with its or their affiliates, holds more than fifteen percent (15%) of the Registrable Shares (as defined in the Registration Rights Agreement), will have the right to require the Company to file with the SEC, a registration statement on FormS-1 orS-3, or any other appropriate form under the Securities Act or the Exchange Act for a public offering of all or part of its Registrable Shares (a “Demand Registration”) by delivery of written notice to the Company, or a demand request.

Within 90 days after receiving the demand request, we are required to file with the SEC the registration statement, on any form for which we then qualify and which is available for the sale of the Registrable Shares in accordance with the intended methods of distribution thereof, with respect to the demand registration. We are required to use commercially reasonable efforts to cause the registration statement to be declared effective as soon as practicable after such filing. We will not be obligated (i) to effect a demand registration within ninety (90) days after the effective date of a previous demand registration, other than for a shelf registration, or (ii) to effect a demand registration unless the demand request is for a number of Registrable Shares with an expected market value that is equal to at least (x) $15 million as of the date of such demand request or is for one hundred percent of the demanding holders of Registrable Shares with respect to any demand registration made onFormS-1 or (y) $5 million as of the date of such demand request with respect to any demand registration made onFormS-3.

Upon receipt of any demand request, we are required to give written notice, within ten (10) days of such demand request, to all other holders of Registrable Shares, who will have the right to elect to include in any subsequent demand registration such portion of their Registrable Shares as they may request, subject to certain exceptions.

In addition, subject to certain exceptions, if we propose to register any class of our common stock for sale to the public, we are required, subject to certain conditions, to include all Registrable Shares with respect to which the Company has received written requests for inclusion.

The rights of a holder of Registrable Shares may be transferred, assigned or otherwise conveyed to any transferee or assignee of such Registrable Shares, subject to applicable state and federal securities laws and regulations and our certificate of incorporation. We will be responsible for expenses relating to the registrations contemplated by the Registration Rights Agreement.

The registration rights granted in the Registration Rights Agreement are subject to customary indemnification and contribution provisions, as well as customary restrictions such as suspension periods and, if a registration is for an underwritten offering, limitations on the number of shares to be included in the underwritten offering imposed by the managing underwriter.

Pursuant to the Registration Rights Agreement, a registration statement relating to resales by affiliates of ZCOF and Whitebox of the shares received by them in connection with our emergence from bankruptcy on August 31, 2012 was declared effective by the SEC on June 23, 2015.

Convertible Notes Offering Registration Rights

In connection with the closing of the Convertible Notes Offering, we entered into a registration rights agreement with the initial purchasers under which we agreed for the benefit of the holders of the Convertible Notes and any shares of our common stock issuable upon conversion of the Convertible Notes or in respect of any make-whole premium that we will, at our cost:

The registration statement required by the terms of the Convertible Notes Registration Rights Agreement was declared effective by the SEC on November 30, 2016.

We may suspend the effectiveness of the shelf registration statement or the use of the prospectus that is part of the shelf registration statement during specified periods under certain circumstances relating to pending corporate developments, public filings with the SEC and similar events. We need not specify the nature of the event giving rise to a suspension in any suspension notice to holders of the Convertible Notes. Each holder, by its acceptance of the Convertible Notes, agrees to hold any such suspension notice in response to a notice of a

proposed sale in confidence. Except in the case of a suspension period as the result of the filing of a post-effective amendment solely to add additional selling security holders, any suspension period may not exceed an aggregate of:

However, if the disclosure relates to a proposed or pending material business transaction, the disclosure of which the Board determines in good faith would be reasonably likely to impede our ability to consummate such transaction, or would otherwise be seriously detrimental to us and our subsidiaries taken as a whole, we may extend the suspension period from 30 days to 45 days in any90-day period or from 60 days to 90 days in any360-day period.

Each of the following is a registration default:

If a registration default occurs, predetermined liquidated damages will accrue on the Convertible Notes, from, and including, the day following such registration default to, but excluding, the earlier of (1) the day on which such registration default has been cured and (2) the date the registration statement is no longer required to be kept effective for our common stock. The liquidated damages will be paid to those entitled to interest payments on such dates semiannually in arrears on each June 15 and December 15 and will accrue at a rate per year equal to:

We will not pay liquidated damages on any Convertible Note after it has been converted into shares of our common stock. If a Convertible Note ceases to be outstanding during a registration default (as a result of the holder exercising its conversion rights or otherwise), we will prorate the liquidated damages to be paid with respect to that Convertible Note.

In no event will liquidated damages exceed 0.50% per year. If a holder converts some or all of its Convertible Notes and we issue any shares of our common stock to satisfy all or any portion of our conversion

obligation or if we issue any shares of our common stock in respect of any make-whole premium, in each case, when there exists a registration default, such holder will not be entitled to receive liquidated damages on such common stock, and we will instead increase the conversion rate or the amount of such make-whole premium, as the case may be, by 3% for each $1,000 principal amount of Convertible Notes. If a registration default occurs after a holder has converted its Convertible Notes into shares of our common stock or after we have issued shares of our common stock in respect of any make-whole premium, such holder will not be entitled to any compensation with respect to such common stock. Other than our obligations to pay liquidated damages, we will not have any liability for damages with respect to a registration default on any registrable securities.

A holder who elects to sell securities under the shelf registration statement will:

Under the registration rights agreement, we will:

Bridge Notes Registration Rights

In connection with the issuance of the Bridge Notes, we entered into the Bridge Notes Registration Rights Agreement with the purchasers of the Bridge Notes (the “Bridge Notes Purchasers”). The Bridge Notes Registration Rights Agreement required us (i) to file, no later November 11, 2016, with the SEC a shelf registration statement covering resales of the shares of our common stock, if any, issuable upon (1) conversion of the Bridge Notes, (2) exercise of subscription rights by any Bridge Note Purchaser or its affiliates pursuant to our 2016 subscription rights offering, and (3) a stock dividend or stock split or in connection with any combination of shares, recapitalization, merger, consolidation or other reorganization, other than shares freely tradeable without any limitations or restrictions under the Securities Act, (ii) to use our commercially reasonable efforts to cause such shelf registration statement to be declared effective by the SEC no later than (A) January 6, 2017 or (B) if earlier, five business days after the date on which the SEC informs us that it will not review the shelf registration statement, and (iii) to use our commercially reasonable efforts to keep such shelf registration statement effective until the earlier of (A) the date on which all of such shares have been sold, (B) the date on which such shares may be sold without volume restrictions under Rule 144 of the Securities Act, or (C) the third anniversary of the effective date of such shelf registration statement.

If we do not fulfill our obligations under the Bridge Notes Registration Rights Agreement with respect to the filing deadline, effectiveness deadline or effectiveness period of a registration statement, we will be required to pay the holders of the Bridge Notes liquidated damages in an amount in cash equal to 1.00% of such holder’s “Allocated Purchase Price,” which is the amount effectively paid by such holder for the common stock acquired upon conversion of the Bridge Notes, per calendar month or portion thereof prior to the cure of such event of default. The maximum payment of liquidated damages to any such holder associated with all events of default will not exceed 5.00% of such holder’s Allocated Purchase Price.

The registration statement required by the terms of the Bridge Notes Registration Rights Agreement was declared effective by the SEC on December 21, 2016.

Topping Unit Registration Rights Agreement

In connection with the Topping Unit Acquisition, we entered into a registration rights agreement with IES (the “Toppingthe Topping Unit Registration Rights Agreement”).Agreement with IES. Under the Topping Unit Registration Rights Agreement, we agreed to file with the SEC within three (3) days after the closing date of the Topping Unit Acquisition and to use our commercially reasonable efforts to cause to become effective a registration statement relating to the Consideration Shares,resales of the common stock issued in connection with the Topping Unit Acquisition (the “Topping Unit Shares”), with an effectiveness deadline as promptly as practicable after filing of thisthe prospectus relating to the registration statement, but in no event later than (x) ninety (90) days after the closing of the Topping Unit Acquisition, or (y) if earlier, three (3) business days after the date on which the SEC informs us (I) that the SEC will not review thisthe registration statement or (II) that we may request acceleration of the effectiveness of thisthe registration statement. We also agreed to use our commercially reasonable efforts to keep the registration statement effective until the earliest to occur of (i) the disposition of all Considerationthe Topping Unit Shares, (ii) the availability under Rule 144 for each holder of Considerationthe Topping Unit Shares to immediately freely resell such ConsiderationTopping Unit Shares without notice, current information, manner of sale or volume restrictions or (iii) the fifth anniversary of the effective date of the registration statement.

The registration statement required by the Topping Unit Registration Rights Agreement was filed with the SEC on December 21, 2018.

USOR Registration Rights Agreement

In connection with the USOR Acquisition, we entered into the USOR Registration Rights Agreement with Trailstone Seller. Under the USOR Registration Rights Agreement, we agreed to file with the SEC within five (5) days after the closing date of the USOR Acquisition and to use our commercially reasonable efforts to cause to become effective a registration statement relating to the Consideration Shares, with an effectiveness deadline as promptly as practicable after filing of this prospectus relating to the registration statement, but in no event later than (x) sixty (60) days after the closing of the USOR Acquisition, or (y) if earlier, five (5) business days after the on which the SEC informs us (I) that the SEC will not review this registration statement or (II) that we may request the effectiveness of this registration statement and we make such request.

If we do not fulfill our obligations under the USOR Registration Rights Agreement with respect to the filing deadline, effectiveness deadline or effectiveness period of a registration statement that does not relate to an underwritten registration or a piggyback registration, we will be required to pay the holders of the Consideration Shares liquidated damages. In addition, the USOR Registration Rights Agreement provides the holders of the Consideration Shares with certain customary demand, shelf takedown and piggyback registration rights, subject to certain exceptions and to certain customary limitations (including with respect to minimum offering size and maximum number of demands and underwritten shelf takedowns).

The registration statement of which this prospectus forms a part is the registration statement required by the terms of the Topping UnitUSOR Purchase Agreement.

Listing

Our common stock is quoted on the NYSE under the symbol “PARR.”

Transfer Agent and Registrar

American Stock Transfer & Trust Company is the transfer agent and registrar for our common stock.

LEGAL MATTERS

The validity of our common stock will be passed upon for us by Porter Hedges LLP, Houston, Texas.

EXPERTS

The financial statements and the related financial statement schedule, incorporated in this prospectus by reference from Par Pacific Holdings, Inc.’s Annual Report on Form10-K for the year ended December 31, 2017, and the effectiveness of Par Pacific Holdings, Inc.’s internal control over financial reporting have been audited by Deloitte & Touche LLP, an independent registered public accounting firm, as stated in their reports, which are incorporated herein by reference. Such financial statements and financial statement schedule have been so incorporated in reliance upon the reports of such firm given upon their authority as experts in accounting and auditing.

The financial statements of Laramie Energy, LLC as of December 31, 2017 and 2016 and for the three years ended December 31, 2017, incorporated in this prospectus by reference from Par Pacific Holdings, Inc.’s Annual Report on Form10-K for the year ended December 31, 2017, have been audited by Deloitte & Touche LLP, independent auditors, as stated in their report, which is incorporated herein by reference. Such financial statements have been so incorporated in reliance upon the report of such firm given upon their authority as experts in accounting and auditing.

The consolidated financial statements of TrailStone NA Asset Finance I, LLC as of and for the years ended December 31, 2017 and 2016, included in our Current Report on Form8-K filed with the SEC on December 7, 2018, have been audited by Ernst & Young LLP, independent auditors, as set forth in their report thereon, included therein and incorporated herein by reference. Such consolidated financial statements have been incorporated herein by reference in reliance upon such report given on the authority of such firm as experts in accounting and auditing.

The information incorporated by reference into this prospectus regarding estimated quantities of our proved reserves, the future net revenues from those reserves and their present value is based, in part, on estimates of reserves and future net revenue as of December 31, 2017, that were prepared by Netherland, Sewell & Associates, Inc., an independent petroleum engineering firm. These estimates are aggregated and the sums incorporated by reference into this prospectus in reliance upon the authority of the firm as an expert in these matters.

WHERE YOU CAN FIND MORE INFORMATION

This prospectus forms a part of a registration statement on FormS-3 we filed with the SEC. This prospectus does not contain all of the information found in the registration statement. For further information regarding us and our common stock, you may desire to review the full registration statement, including its exhibits and schedules, filed under the Securities Act, as well as our proxy statement, annual, quarterly and other reports and other information we file with the SEC. Such reports and other information can be inspected and copied at the SEC’s Public Reference Room at 100 F Street, N.E., Washington, D.C. 20549. You may also obtain copies of these documents at prescribed rates from the Public Reference Section of the SEC at its Washington, D.C. address. Please call the SEC at1-800-SEC-0330 for further information. Our filings are also available to the public at the SEC’s website at www.sec.gov.www.sec.gov. In addition, documents filed by us can be inspected at the offices of the NYSE, 20 Broad Street, New York, New; York 10002. We maintain a website at www.parpacific.com. On the investors page of that site, we provide access to our SEC filings free of charge as soon as reasonably practicable after filing with the SEC. Our registration statement, of which this prospectus constitutes a part, can be downloaded from the SEC’s website or from our website. The information on our website or on any other website is not incorporated in this prospectus by reference and you should not consider it part of any offering.

INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

The SEC allows us to “incorporate by reference” into this prospectus the information we file with it, which means that we can disclose important information to you by referring you to the documents containing such information. Information incorporated by reference is considered to be part of this prospectus, and later information that we file with the SEC will automatically update and supersede that information. We incorporate by reference the documents listed below:

All documents filed by us pursuant to Section 13(a), 13(c), 14 or 15(d) of the Exchange Act (excluding any information furnished pursuant to Item 2.02 or Item 7.01, or any corresponding information furnished under Item 9.01, on any Current Report on Form8-K) after the date of this initial registration statement and prior to the effectiveness of the registration statement and after the date of this prospectus and prior to the termination of this offering shall be deemed to be incorporated into this prospectus by reference and to be a part hereof from the date of filing such document.

Any statement contained in this prospectus or in a document incorporated or deemed to be incorporated by reference in this prospectus shall be deemed to be modified or superseded for purposes of this prospectus to the extent that a statement contained herein or in any other subsequently filed document which also is or is deemed to be incorporated by reference modifies or supersedes the statement. Any statement so modified or superseded shall not be deemed, except as so modified or superseded, to constitute a part of this prospectus.

This prospectus incorporates documents by reference that are not delivered with this prospectus. Copies of these documents, other than the exhibits to the documents (unless such exhibits are specifically incorporated by reference in such documents), are available upon written or oral request, at no charge, from us. Requests for such copies should be directed to Par Pacific Holdings, Inc., 825 Town & Country Lane, Suite 1500, Houston, Texas 77024, Attention: Corporate Secretary, telephone number: (281)899-4800.

1,108,2022,363,776 Shares of Common Stock

PAR PACIFIC HOLDINGS, INC.

PROSPECTUS

                    , 20182019

PART II

INFORMATION NOT REQUIRED IN PROSPECTUS

The following table sets forth the various expenses, all of which will be borne by Par Pacific Holdings, Inc. (the “Company”), in connection with the sale and distribution of the securities being registered. All amounts shown are estimates except for the SEC registration fee.

Section 145 of the General Corporation Law of the State of Delaware (the “DGCL”) permits a corporation to indemnify any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action, suit or proceeding, whether civil, criminal, administrative or investigative, by reason of the fact that he is or was a director, officer, employee or agent of the corporation or is or was serving at the request of the corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise against expenses (including attorneys’ fees), judgments, fines and amounts paid in settlement actually and reasonably incurred by him in connection with such action.

In an action brought to obtain a judgment in the corporation’s favor, whether by the corporation itself or derivatively by a stockholder, the corporation may only indemnify for expenses, including attorneys’ fees, actually and reasonably incurred in connection with the defense or settlement of such action, and the corporation may not indemnify for amounts paid in satisfaction of a judgment or in settlement of the claim. In any such action, no indemnification may be paid in respect of any claim, issue or matter as to which such person shall have been adjudged liable to the corporation except as otherwise approved by the Delaware Court of Chancery or the court in which the claim was brought. In any other type of proceeding, the indemnification may extend to judgments, fines and amounts paid in settlement, actually and reasonably incurred in connection with such other proceeding, as well as to expenses (including attorneys’ fees).

The statute does not permit indemnification unless the person seeking indemnification has acted in good faith and in a manner he reasonably believed to be in, or not opposed to, the best interests of the corporation and, in the case of criminal actions or proceedings, the person had no reasonable cause to believe his conduct was unlawful. There are additional limitations applicable to criminal actions and to actions brought by or in the name of the corporation. The determination as to whether a person seeking indemnification has met the required standard of conduct is to be made (i) by a majority vote of a quorum of disinterested members of the board of directors, (ii) by independent legal counsel in a written opinion, if such a quorum does not exist or if the disinterested directors so direct, or (iii) by the stockholders.

As permitted by the DGCL, the Company’s bylaws provide that the Company will indemnify its directors, officers, employees and agents against certain liabilities that they may incur in their capacities as directors, officers, employees and agents. Furthermore, the Company’s certificate of incorporation indemnifies its directors, officers, employees, and agents, together referred to as the Authorized Representatives, against certain liabilities arising on or after August 31, 2012, the effective date of the Third Amended Joint Chapter 11 Plan of Reorganization of Delta Petroleum Corporation and Its Debtor Affiliates, dated August 16, 2012, to the extent

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such Authorized Representatives acted in good faith and in a manner such Authorized Representatives reasonably believed to be in or not opposed to the best interests of the Company, and, with respect to any criminal action or proceeding, had no reasonable cause to believe such Authorized Representatives’ conduct was unlawful. The Company has also entered into indemnification agreements with its officers and directors providing for indemnification to the maximum extent permitted under the DGCL. The Company has director and officer liability insurance policies that provide coverage of up to $10 million.

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(4) That, for the purpose of determining liability under the Securities Act to any purchaser:

(A) Each prospectus filed by the registrant pursuant to Rule 424(b)(3) shall be deemed to be part of the registration statement as of the date the filed prospectus was deemed part of and included in the registration statement; and

(B) Each prospectus required to be filed pursuant to Rule 424(b)(2), (b)(5), or (b)(7) as part of a registration statement in reliance on Rule 430B relating to an offering made pursuant to Rule 415(a)(1)(i), (vii) or (x) for the purpose of providing the information required by section 10(a) of the Securities Act shall be deemed to be part of and included in the registration statement as of the earlier of the date such form of prospectus is first used after effectiveness or the date of the first contract of sale of securities in the offering described in the prospectus. As provided in Rule 430B, for liability purposes of the issuer and any person that is at that date an underwriter, such date shall be deemed to be a new effective date of the registration statement relating to the securities in the registration statement to which that prospectus relates, and the offering of such

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SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, the registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on FormS-3 and has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the city of Houston, State of Texas, on December 20, 2018.January 16, 2019.

POWER OF ATTORNEY AND SIGNATURES

We the undersigned officers and directors of Par Pacific Holdings, Inc., hereby, severally constitute and appoint William Pate, William Monteleone and J. Matthew Vaughn, each of them singly, our true and lawful attorneys with full power to them and each of them singly, to sign for us and in our names in the capacities indicated below, the registration statement on FormS-3 filed herewith and any and allpre-effective and post-effective amendments to said registration statement and any subsequent registration statement for the same offering which may be filed under Rule 462(b) and generally to do all such things in our names and on our behalf in our capacities as officers and directors to enable Par Pacific Holdings, Inc. to comply with the provisions of the Securities Act of 1933, and all requirements of the SEC, hereby ratifying and confirming our signatures as they may be signed by our said attorneys, or any of them, to said registration statement and any and all amendments thereto or to any subsequent registration statement for the same offering which may be filed under Rule 462(b).

Pursuant to the requirements of the Securities Act of 1933, this registration statement has been signed by the following persons in the capacities and on the dates indicated.

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