Home / Auditor changes / MAMMOTH ENERGY SERVICES, INC.
Filed 2026-05-15 路 Form 8-K 路 Accession 0001628280-26-035328 micro
Price before filing: $3.27 (2026-05-14 close, split/dividend-adjusted)
Market cap at flag: $154.7M (2026-05-15) 路 Latest: $130.5M (2026-10-16)
| Window | TUSK | SPY | vs SPY | |
|---|---|---|---|---|
| 30 days | -5.5% | +0.9% | -6.4% | 2026-06-15 |
| 90 days | -1.8% | +4.2% | -6.1% | 2026-08-13 |
| 180 days | pending | pending | until 2026-11-11 |
Return from the last close before the filing date to the first close on/after the window end. Pending windows have not fully elapsed. Past performance says nothing certain about the future.
90 days before the flag: no open-market insider sales or purchases reported.
30 days after: 1 insider bought $32K (4 purchases)
| Date | Insider | Type | Shares | Price | Value | 10b5-1 plan | Source |
|---|---|---|---|---|---|---|---|
| 2026-05-15: red flag filed | |||||||
| 2026-05-26 | Amron Arthur H Director | Purchase | 2,500 | $3.24 | $8K | no | Form 4 |
| 2026-05-28 | Amron Arthur H Director | Purchase | 3,000 | $3.25 | $10K | no | Form 4 |
| 2026-06-11 | Amron Arthur H Director | Purchase | 2,500 | $3.22 | $8K | no | Form 4 |
| 2026-06-12 | Amron Arthur H Director | Purchase | 2,000 | $3.28 | $7K | no | Form 4 |
Open-market purchases and sales (Form 4 codes P and S) by officers, directors and 10% owners, by transaction date, from 2026-02-14 to 2026-06-14. Excludes option exercises, grants, gifts and tax withholding. Amended filings replace the originals; joint filings count once. Foreign private issuers do not file Form 4. Many insider sales are pre-scheduled (10b5-1 plans) and are not by themselves a sign of wrongdoing.
"(the "Company") approved the dismissal of Deloitte & Touche LLP ("Deloitte") as the Company's independent registered public accounting firm."
Quoted from the filing. Source
The company changed its outside auditor (8-K Item 4.01). A dismissal or resignation, especially near an annual report or with reported disagreements, is a warning sign. Changes caused by audit firms merging are usually routine.
Type: dismissed
Disagreements reported: no
Former auditor: Deloitte & Touche LLP · New auditor: Carr, Riggs & Ingram, L.L.C.
Read the original filing on SEC.gov →
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