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See how Context works →On the price, the facts of the public record■Insider buy□Insider sell●Results filed
With an account, also○dividends▲splits◌next earningswith an account
End-of-day prices provided by Twelve Data · One close per session; the series does not update during the trading day.
Latest on record
The most recent facts, as filed.
Up to three of the most recent, checkable facts already loaded on this page, each linked to its source.
- Sep 16, 2026Reported purchase · Form 4Mark Lawrence Plaumann · $15.0KOpen the filing ↗
- Aug 7, 2026Quarterly report · 10-QFiled by the company itself.Open the filing ↗
- Aug 7, 2026Material event · 8-KFiled by the company itself.Open the filing ↗
In numbers
What this profile holds, counted.
Closes · 1 year250
SEC filings on record3486 flagged findings
Reported transactions (Form 4)40since Dec 15, 2023
Corporate events (8-K)30since May 22, 2020
What the record says
Description, identity and filings, each with its source.
Every block cites its source. The colour of a finding marks its category — which document, who filed it — not how much it matters.
Regulatory history
Topics detected in its SEC reports, with the original excerpt.
Each topic is assigned by a classifier over the full filing; the excerpts show where it was detected and are not always enough to verify it. Open the filing to read it in full.
- 2026-05-11capital return (buybacks/dividends)recentOpen filing ↗“…equipment and other goods in our industries and other sectors; • our ability to comply with the applicable financial covenants and…”
+1 more passage from the same document
- “…that the fair value of its drilling rig assets exceeds the carrying value and, therefore, no impairment was recognized.…”
- 2026-03-06share offering or dilution eventrecentOpen filing ↗“…Down-hole motors are used to increase the speed and efficiency of the drill bit or can be used to steer the bit in directional…”
+1 more passage from the same document
- “…processes. Commonly, horizontal drilling coupled with multistage fracturing is used to access these difficult to produce…”
- 2026-03-06capital return (buybacks/dividends)recentOpen filing ↗“…equipment and other goods in our industries and other sectors; • our ability to comply with the applicable financial covenants and…”
+1 more passage from the same document
- “…for disputes with us or our directors, officers or other employees. 16 • The declaration of dividends on our common stock is…”
Original excerpts from SEC filings, untranslated. Not advice and not a prediction.
The 25 most recent filings (of 348)
Every SEC filing, newest first, with what it is. Below, each type with its own explanation.
- Sep 17, 26Form 4 ↗Insider transaction
- Aug 7, 2610-Q ↗Quarterly report
- Aug 7, 268-K ↗Current report · Results · Communication to the market
- Jul 1, 26Form 4 ↗Insider transaction
- Jun 26, 268-K ↗Current report · Shareholder vote results
- Jun 22, 26SCHEDULE 13G ↗Passive stake · Charles E. Davidson · 13.4% · event on Jun 17, 26
- Jun 22, 26SCHEDULE 13G/A ↗Passive stake · Wexford Capital LP · 25.1% · event on Jun 17, 26 · amendment
- May 15, 26DEFA14A ↗Shareholder meeting and votes
- May 15, 26DEF 14A ↗Shareholder meeting and votes
- May 15, 268-K ↗Current report · Auditor change filing (8-K Item 4.01)
- May 11, 2610-Q ↗Quarterly report
- May 11, 268-K ↗Current report · Results
- Mar 6, 2610-K ↗Annual report
- Mar 6, 268-K ↗Current report · Results
- Dec 15, 25Form 4 ↗Insider transaction
- Dec 4, 258-K ↗Current report · Entered a material agreement
- Nov 3, 2510-Q ↗Quarterly report
- Oct 31, 258-K ↗Current report · Results
- Aug 14, 25SCHEDULE 13G/A ↗Passive stake · VALUEWORKS LLC · 5.0% · event on Jun 30, 25 · amendment
348 filings on record, the oldest from Aug 11, 16.
Listing the 25 most recent filings of the 348 on record.
73215
- May 15, 26Auditor change filing (8-K Item 4.01)+1 more in the same filing8-K 4.01 ↗
- Dec 4, 25Entered a material agreement+3 more in the same filing8-K 1.01 ↗
- Jul 3, 25Entered a material agreement+2 more in the same filing8-K 1.01 ↗
- Jun 30, 25A senior executive left or was appointed8-K 5.02 ↗
- Jun 20, 25Write-down of assets+3 more in the same filing8-K 2.06 ↗
- Jun 5, 25A senior executive left or was appointed8-K 5.02 ↗
- Apr 17, 25Entered a material agreement+4 more in the same filing8-K 1.01 ↗
- Mar 12, 25Auditor change filing (8-K Item 4.01)+1 more in the same filing8-K 4.01 ↗
- Feb 13, 25A senior executive left or was appointed8-K 5.02 ↗
- Nov 7, 24A senior executive left or was appointed+2 more in the same filing8-K 5.02 ↗
- Oct 21, 24Entered a material agreement+3 more in the same filing8-K 1.01 ↗
- Oct 3, 24A debt obligation was accelerated+3 more in the same filing8-K 2.04 ↗
6 older filings not shown · The record reaches back to Oct 19, 16.
Stress disclosures older than the timeline above. They are individual events from the record, not a complete timeline: there may be more between them.
- Jul 23, 24A debt obligation was accelerated+2 more in the same filing8-K 2.04 ↗
- Sep 27, 21A debt obligation was accelerated+1 more in the same filing8-K 2.04 ↗
- May 22, 20Listing notice (8-K 3.01)8-K 3.01 ↗
- Apr 22, 20Listing notice (8-K 3.01)8-K 3.01 ↗
The full record holds 7 stress filings.
Corporate events are tracked from 2004-08-23, when the SEC renumbered 8-K items. Earlier filings use an incompatible numbering and are not classified here.
Schedule 13G: short-form filing
The short form, for holders who meet specific requirements: institutional investors, passive investors without a control purpose, or exempt investors. Asset managers and index funds usually file it.
- Wexford Capital LP25.1%Jun 17, 26SCHEDULE 13G/A ↗4 co-filers on this document — the figure is the largest single stake, not their sum.
- Charles E. Davidson13.4%Jun 17, 26SCHEDULE 13G ↗2 co-filers on this document — the figure is the largest single stake, not their sum.
- VALUEWORKS LLC5.0%Jun 30, 25SCHEDULE 13G/A ↗4 co-filers on this document — the figure is the largest single stake, not their sum.
Structured 13D/G data starts 2023-12, when the SEC moved these filings to a machine-readable format. Earlier filings exist but are not parsed here.
- Sep 16, 26Buy$15KMark Lawrence Plaumann↗
- Jun 17, 26Buy$10.5MWEXFORD CAPITAL LPChief Business Officer↗
- Jun 12, 26Buy$7KArthur H Amron↗
- Jun 11, 26Buy$8KArthur H Amron↗
- May 28, 26Buy$10KArthur H Amron↗
- May 26, 26Buy$8KArthur H Amron↗
- Dec 11, 25Buy$19KArthur H Amron↗
- May 22, 25Sell$50KARTHUR L SMITH↗
- May 20, 25Sell$125KARTHUR L SMITH↗
- May 19, 25Sell$37KARTHUR L SMITH↗
- Dec 12, 24Buy$3KArthur H Amron↗
- Nov 25, 24Sell$52KCorey J. Booker↗
There are 14 more transactions in this stretch.
Stock compensation, tax and giftsshow the 14 other transactionshide
Stock compensation, tax withholding, option exercises and gifts. They are listed separately and are not included in the purchase and sale totals. The type describes the transaction, not the filer's intent.
- Jun 26, 26Otheramount n/aPhillip Lancaster↗
- Jun 17, 26Otheramount n/aCHARLES E DAVIDSON↗
- Jun 17, 26Otheramount n/aCHARLES E DAVIDSON↗
- Jun 17, 26Otheramount n/aWEXFORD CAPITAL LPChief Business Officer↗
- Jun 17, 26Otheramount n/aWEXFORD CAPITAL LPChief Business Officer↗
- Jun 17, 26Otheramount n/aArthur H Amron↗
- Jun 17, 26Otheramount n/aArthur H Amron↗
- Jun 17, 26Otheramount n/aPaul M. JacobiChief Business Officer↗
- Jun 12, 24Compensationamount n/aArthur H Amron↗
- Jun 12, 24Compensationamount n/aPaul M. Jacobi↗
- Jun 12, 24Compensationamount n/aARTHUR L SMITH↗
- Jun 12, 24Compensationamount n/aJames D Palm↗
- Jun 12, 24Compensationamount n/aCorey J. Booker↗
- Mar 12, 24Otheramount n/aWEXFORD CAPITAL LP↗
The full record holds 49 transactions and goes back to Mar 3, 23.
Its sector and its market
Mammoth Energy Services Inc. among Industrials companies
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Coverage
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- End-of-day closes provided by Twelve Data. One close per session; not real time. Closes adjusted for splits.
- Series quality
- 250 clean closes in the period.
- SEC records
- 348 documents on file, from Aug 11, 2016 to Sep 17, 2026.
- Company description
- No description available.
- This page
- Generated on Oct 19, 2026; refreshed through the day.
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Which SEC documents appear here?
Those filed with the SEC by the company, its insiders and its major shareholders, within our coverage: periodic reports (10-K, 10-Q, 20-F), material events (8-K), proposed sale notices (Form 144), insider transactions (Form 4) and stakes above 5% (13D/13G). Each links to the original on EDGAR.
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It depends on the company: some European issuers file a 20-F or 6-K with the SEC and others don't. The profile shows whatever is on record; when there is nothing, it says so rather than guessing why. Europe does not yet have a common filing archive like EDGAR in the United States. The EU will open its own, ESAP, in July 2027 (managers' transactions arrive in January 2028), and we plan to add it once it is available.
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