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MAMMOTH ENERGY SVCS INC (TUSK)

Institutional ownership, SEC filings and insider activity

Sector: Energy · SEC CIK 0001679268 · EDGAR filings · Updated 2026-07-01

MAMMOTH ENERGY SVCS INC (TUSK) has reported institutional ownership of 72.5%, with 89 institutional managers holding positions valued at $86.0M per the latest 13F reporting period. SEC filings include an active material impairment disclosure (8-K Item 2.06), notice of delisting or failure to satisfy a continued listing rule (8-K Item 3.01), triggering event that accelerates or increases a direct financial obligation (8-K Item 2.04).

Institutional ownership
72.5%
Institutional managers
89
Reported 13F value
$86.0M
Insider activity
4 trans.
−$194.2K net selling
Data flags
3 active
from SEC filings

Latest updates

Institutional ownership overview

According to SEC 13F filings tracked by Sightfile, MAMMOTH ENERGY SVCS INC has 89 institutional holders and institutional ownership of 72.5%.

Insider activity

Insiders reported 4 transactions (1 buys, 3 sells) across 2 reporting insiders, with a net reported value of −$194.2K.

Data flags from SEC filings

Active material impairment disclosure (8-K Item 2.06), most recently filed 2025-06-20 (recurring since 2024-07-23) — source filing. The authoritative details are those stated in the filing itself.
Active triggering event that accelerates or increases a direct financial obligation (8-K Item 2.04), most recently filed 2024-10-03 (recurring since 2021-09-27) — source filing. The authoritative details are those stated in the filing itself.
Active notice of delisting or failure to satisfy a continued listing rule (8-K Item 3.01), most recently filed 2020-05-22 (recurring since 2020-04-22) — source filing. The authoritative details are those stated in the filing itself.

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See full history, cross-references and alerts on Sightfile
Sightfile provides information only — not investment advice, recommendations, or an assessment of any security. Data is derived from official public sources (SEC EDGAR and U.S. government agencies), may contain errors or delays, and should be verified against the source filing before relying on it.
Data sources: SEC EDGAR (filings, 13F, FTD), aggregated by Sightfile. Page updated 2026-07-01.