Financial reports
10-K/A
2020 FY
Annual report (amended)
15 Apr 20
10-K
2019 FY
Annual report
5 Mar 20
10-Q
2019 Q3
Quarterly report
12 Nov 19
10-Q
2019 Q2
Quarterly report
1 Oct 19
10-Q
2019 Q1
Quarterly report
20 Sep 19
10-K
2018 FY
Annual report
26 Aug 19
NT 10-Q
Notice of late quarterly filing
12 Aug 19
NT 10-Q
Notice of late quarterly filing
13 May 19
NT 10-K
Notice of late annual filing
4 Mar 19
10-Q
2018 Q3
Quarterly report
14 Nov 18
Current reports
8-K
Triggering Events That Accelerate or Increase a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement
16 Jan 20
8-K
Entry into a Material Definitive Agreement
6 Jan 20
8-K
Submission of Matters to a Vote of Security Holders
31 Oct 19
8-K
Bankruptcy or Receivership
17 Sep 19
8-K
Bankruptcy or Receivership
12 Sep 19
8-K
Alta Mesa Resources Receives Nasdaq Notice Regarding
21 Aug 19
8-K
Triggering Events That Accelerate or Increase a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement
15 Aug 19
8-K
Shareholder Nominations Pursuant to Exchange Act Rule 14a-11
6 Aug 19
8-K
Entry into a Material Definitive Agreement
8 Jul 19
8-K
Results of Operations and Financial Condition
17 May 19
Registration and prospectus
15-12B
Securities registration termination
19 Feb 20
15-12B
Securities registration termination
13 Feb 20
S-8 POS
Registration of securities for employees (post-effective amendment)
11 Feb 20
POS AM
Prospectus update (post-effective amendment)
11 Feb 20
25-NSE
Exchange delisting
11 Oct 19
424B3
Prospectus supplement
7 Jan 19
424B3
Prospectus supplement
4 Jan 19
424B3
Prospectus supplement
27 Dec 18
424B3
Prospectus supplement
14 Nov 18
424B3
Prospectus supplement
15 Aug 18
Proxies
DEF 14A
Definitive proxy
10 Sep 19
DEF 14A
Definitive proxy
16 May 18
DEFA14A
Additional proxy soliciting materials
5 Feb 18
DEFA14A
Additional proxy soliciting materials
22 Jan 18
DEFM14A
Proxy related to merger
19 Jan 18
DEFA14A
Additional proxy soliciting materials
12 Jan 18
DEFA14A
Additional proxy soliciting materials
12 Jan 18
DEFA14A
Additional proxy soliciting materials
12 Jan 18
PRER14A
Preliminary revised proxy
12 Jan 18
DEFA14A
Additional proxy soliciting materials
9 Jan 18
Other
EFFECT
Notice of effectiveness
18 Feb 20
EFFECT
Notice of effectiveness
13 Apr 18
CORRESP
Correspondence with SEC
11 Apr 18
UPLOAD
Letter from SEC
22 Jan 18
CORRESP
Correspondence with SEC
22 Nov 17
UPLOAD
Letter from SEC
16 Nov 17
CORRESP
Correspondence with SEC
31 Oct 17
UPLOAD
Letter from SEC
23 Oct 17
CORRESP
Correspondence with SEC
23 Mar 17
EFFECT
Notice of effectiveness
23 Mar 17
Ownership
3
Curtis M. Emerson
24 Oct 19
SC 13G/A
Alta Mesa Resources, Inc. /DE
10 Oct 19
4
Change in insider ownership
13 Aug 19
SC 13D/A
Alta Mesa Resources, Inc. /DE
13 Aug 19
4
Kimberly O. Warnica
10 Apr 19
4
Michael Anthony McCabe
19 Feb 19
4
Ronald Jay Smith
19 Feb 19
SC 13G/A
Alta Mesa Resources, Inc. /DE
14 Feb 19
SC 13G/A
Alta Mesa Resources, Inc. /DE
14 Feb 19
SC 13G/A
Alta Mesa Resources, Inc. /DE
14 Feb 19