---
schema_version: "secwatch.filing_event.v1"
accession: "0001679268-25-000012"
form_type: "8-K"
ticker: "TUSK"
cik: "0001679268"
company_name: "MAMMOTH ENERGY SERVICES, INC."
filed_at: "2025-03-12T23:59:59+00:00"
generated_at: "2026-05-24T22:36:31.024171+00:00"
event_type: "other"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Mammoth Energy dismisses Grant Thornton as auditor, appoints Deloitte & Touche

## Summary
- Audit committee dismissed Grant Thornton LLP on March 7, 2025, effective immediately.
- Deloitte & Touche LLP engaged as new independent auditor for fiscal year ending December 31, 2025.
- No disagreements or reportable events existed with Grant Thornton during fiscal years 2024, 2023, or through March 7, 2025.
- Grant Thornton's audit reports for 2024 and 2023 were unqualified; Grant Thornton filed a letter agreeing with the statements as Exhibit 16.1.

## SEC filing metadata
- accession: 0001679268-25-000012
- form_type: 8-K
- ticker: TUSK
- cik: 0001679268
- company_name: MAMMOTH ENERGY SERVICES, INC.
- filed_at: 2025-03-12T23:59:59+00:00
- event_type: other
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 4.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1679268/000167926825000012/0001679268-25-000012-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1679268/000167926825000012/tusk-20250307.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001679268-25-000012
- JSON: https://secwatch.observer/filing/0001679268-25-000012.json
- Plain text: https://secwatch.observer/filing/0001679268-25-000012.txt

## Key facts
- Auditor Changes
  MAMMOTH ENERGY SERVICES, INC. engaged Deloitte & Touche LLP as its auditor.
  - Action: engagement
  - Auditor: Deloitte & Touche LLP
  source text: Also on March 7, 2025, the Audit Committee approved the engagement of Deloitte & Touche LLP (“Deloitte”) as its new independent registered public accounting firm. Deloitte’s appointment will be for the Company’s fiscal year ending December 31, 2025, and related interim periods.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1679268/000167926825000012/0001679268-25-000012-index.htm
- Auditor Changes
  MAMMOTH ENERGY SERVICES, INC. dismissed Grant Thornton LLP as its auditor.
  - Action: dismissal
  - Auditor: Grant Thornton LLP
  - Successor: Deloitte & Touche LLP
  source text: (the “Company”) approved the dismissal of Grant Thornton LLP (“Grant Thornton”) as the Company’s independent registered public accounting firm.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1679268/000167926825000012/0001679268-25-000012-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.