Mammoth Energy Services, Inc.

TUSK

Exchange: Nasdaq
Industry: Oil & Gas Field Services, NEC
SEC CIK: 0001679268

SEC filings (opens in a new tab)

In the last 90 days, Mammoth Energy Services, Inc. insiders filed 1 open-market purchase and 0 sales; 93 institutions reported holding it in 13F filings for Q2 2026, worth $84.7M in total; no superinvestor holds it.

Q3 2025 vs. Q2 2025

How the institutions holding Mammoth Energy Services, Inc. changed between Q2 2025 and Q3 2025.

All holders in Q3 2025 All holders in Q2 2025

13F holders of TUSK: Q2 2025 compared with Q3 2025
Measure	Q2 2025	Q3 2025	Change
Holders	66	77	+11
Shares	36.4M	36.1M	−340.2K (−0.9%)
Value	$101.9M	$82.6M	−$19.4M (−19.0%)

New holders (16)

Institutions that held Mammoth Energy Services, Inc. at the end of Q3 2025 but not at the end of Q2 2025.

Institutions new to TUSK in Q3 2025
Institution	Shares	Value	% of portfolio
Deutsche Bank AG	72,183	$165.3K	0.00%
GWM Advisors LLC	25,494	$58.4K	0.00%
Steinberganna Wealth Management	24,265	$55.6K	0.03%
Franklin Resources Inc	15,791	$36.2K	0.00%
HRT Financial LP	15,076	$34.0K	0.00%
Virtu Financial LLC	14,148	$32.0K	0.00%
AQR Capital Management LLC	11,299	$25.9K	0.00%
Invesco Ltd.	10,733	$24.6K	0.00%
Russell Investments Group, Ltd.	2,091	$4.79K	0.00%
Advisory Services Network, LLC	500	$1.15K	0.00%
Optiver Holding B.V.	328	$751	0.00%
Transamerica Financial Advisors, Inc.	156	$357	0.00%
SRS Capital Advisors, Inc.	70	$160	0.00%
IFP Advisors, Inc	30	$69	0.00%
Clearstead Advisors, LLC	11	$26	0.00%
Allworth Financial LP	1	$3	0.00%

Sold out (5)

Institutions that held Mammoth Energy Services, Inc. at the end of Q2 2025 and filed for Q3 2025 without it.

Institutions that sold out of TUSK in Q3 2025
Institution	Shares, Q2 2025	Value, Q2 2025
Millennium Management LLC	21,851	$61.2K
Penbrook Management LLC	13,000	$36.4K
Wealth Enhancement Advisory Services, LLC	12,121	$33.9K
Group One Trading, L.P.	8,164	$22.9K
Simplex Trading, LLC	2,419	$6.00K