Boston Partners

Position in TUSK — Mammoth Energy Services, Inc.

CIK 1386060 BOSTON, MA

Position in TUSK

as of Jun 30, 2026 · filed Aug 4, 2026 Compact

Position Value

$224,038

-$154,212 QoQ

Shares Held

68,935

-55.3% QoQ

Ownership

0.143%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

#32

of 94 holders

Holding Since

Jun 2021

12 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Industrials · as of Jun 30, 2026

Boston Partners holds $553,815,644 across 5 Conglomerates names. TUSK ranks #5 (0.0% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	HON	Honeywell International Inc	1,710,314	$382,939,304
2	MMM	3M Co	1,050,026	$170,009,708
3	MATW	Matthews International Corp	12,870	$346,460
4	CODI	Compass Diversified Holdings	27,780	$296,134
5	TUSK	Mammoth Energy Services, Inc. This page	68,935	$224,038

12 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$224,038	68,935	-55.3%	Shares	Defined	2026-08-04
2026-03-31	$378,250	154,388	+339.9%	Shares	Defined	2026-05-11
2023-09-30	$162,831	35,093	-43.6%	Shares	Defined	2023-11-08
2023-06-30	$300,358	62,186	+53.8%	Shares	Defined	2023-08-10
2023-03-31	$170,606	40,428	-10.3%	Shares	Defined	2023-05-09
2022-12-31	$389,881	45,073	0.0%	Shares	Defined	2023-02-08
2022-09-30	$153,698	45,073	-37.5%	Shares	Defined	2022-11-09
2022-06-30	$158,734	72,152	-49.3%	Shares	Defined	2022-08-10
2022-03-31	$303,018	142,262	+126.9%	Shares	Defined	2022-05-10
2021-12-31	$114,115	62,701	-17.9%	Shares	Defined	2022-02-04
2021-09-30	$222,259	76,378	+60.0%	Shares	Defined	2021-11-05
2021-06-30	$219,057	47,725	—	Shares	Defined	2021-08-12
No filing history on record for this holder in this stock.