$TUSK

$2.83 +$0.05 (1.62%) Close

$TUSK Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 48.1M shares outstanding

Who owns TUSK?

By type of holder

Institutions 54.1% Insiders 39.8% Everyone else 6.1%

Concentration Top 10 holders own 44.2%

Wexford Capital LP 25.1% · Adage Capital Partners GP, L.L.C. 9.5%

Institutional ownership

54.1%

-18.8 pts vs last qtr

Institutional holders

+2 vs last qtr

Net shares bought

−9.0M

by institutions in Q2 2026

New / sold out

27 / 25

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Jane Street Group, LLC +483.8K
Marshall Wace, LLP NEW +395.6K

Biggest sellers in Q2 2026

Wexford Capital LP −10.0M
BlackRock, Inc. −1.0M

Who is planning to sell?

No insider has filed a notice of proposed sale (Form 144) for Mammoth Energy Services Inc in the last 12 months.

Is your stake being diluted?

Diluted share count, FY2016–FY2025

+53.3%

+4.86% a year

Each share's claim on the business

−34.7%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

— vs $20.5M

over 10 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years15% 3–5 years65% 1–3 years4% Under 1 year15%

Quarterly turnover

24.3%

of institutional shares changed hands

Top 10 managers, median time held

4 years

Super Investors

Investment managers reporting TUSK on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
WC Wexford Capital LP	12.1M	25.08%	−10.0M (−45.3%)	2021	5.0%
Shares held by quarter Peak holding22.1M (Q2'25) Change over 8 quarters−10.0M Share of the company25.080% Wexford Capital LP's full portfolio →
AC Adage Capital Partners GP, L.L.C.	4.6M	9.51%	Unchanged	2022	0.0%
Shares held by quarter Peak holding4.6M (Q2'25) Change over 8 quarters+521.3K Share of the company9.510% Adage Capital Partners GP, L.L.C.'s full portfolio →

Wexford Capital LP

12.1M

% of company

25.08%

Change vs last qtr

−10.0M (−45.3%)

Held since

2021

Adage Capital Partners GP, L.L.C.

4.6M

% of company

9.51%

Change vs last qtr

Unchanged

Held since

2022

28 more super investors behind a free account

See every manager holding Mammoth Energy Services Inc, how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting TUSK on Form N-PORT; together they hold 8.6% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$2.5M	767.9K	1.60%	0.00%	June 30, 2026
IR iShares Russell 2000 ETF iShares Trust	$1.27M	516.5K	1.07%	0.00%	March 31, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$2.5M

% of company

1.60%

% of the fund

0.00%

As of

June 30, 2026

iShares Russell 2000 ETF

iShares Trust

Position value

$1.27M

% of company

1.07%

% of the fund

0.00%

As of

March 31, 2026

23 more funds behind a free account

See every fund holding Mammoth Energy Services Inc and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
LP Lancaster Phillip Insider	159.4K	0.33%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.330% Lancaster Phillip's insider activity →
SA Smith Arthur L Insider	130.0K	0.27%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.270% Smith Arthur L's insider activity →

Lancaster Phillip

Insider

159.4K

% of company

0.33%

Change vs last qtr

—

Held since

—

Smith Arthur L

Insider

130.0K

% of company

0.27%

Change vs last qtr

—

Held since

—

4 more holders behind a free account

See every insider and 5%+ holder of Mammoth Energy Services Inc.

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