Arrowstreet Capital’s Mammoth Energy Services TUSK Stock Holding History

Arrowstreet Capital’s Portfolio TUSK Stock Details TUSK Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$943K	Buy	+290,096	New	+$849K	﹤0.01%	1652
2019 Q2	–	Sell	-68,467	Closed	-$1.14M	–	1707
2019 Q1	$1.14M	Buy	+68,467	New	+$1.46M	﹤0.01%	1287
2017 Q3	–	Sell	-79,697	Closed	-$1.48M	–	1242
2017 Q2	$1.48M	Buy	79,697 +10,876	+16%	+$203K	﹤0.01%	701
2017 Q1	$1.48M	Buy	+68,821	New	+$1.31M	0.01%	882

Other funds holding TUSK

Wexford Capital West Palm Beach, Florida $782M AUM 62.56% 1-Year Est. Return

Adage Capital Partners Boston, Massachusetts $71.3B AUM 56.8% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

PLC

Peapod Lane Capital Bedford Hills, New York $148M AUM 89.92% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

Jane Street New York $1.21T AUM 78.12% 1-Year Est. Return

Citadel Advisors Miami, Florida $875B AUM 40.89% 1-Year Est. Return

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Marshall Wace London, United Kingdom $127B AUM 46.06% 1-Year Est. Return

JHU

Johns Hopkins University Baltimore, Maryland $1.5B AUM 13.39% 1-Year Est. Return

Arrowstreet Capital's TUSK Position: Q2 2026 in Review

Arrowstreet Capital opened a new position in Mammoth Energy Services (TUSK) in Q2 2026: 290,096 shares worth $943K. The stake represents ﹤0.01% of the portfolio and ranks #1652 among its holdings. This is a return to the name: Arrowstreet Capital previously reported a position in TUSK as recently as Q1 2019.

Arrowstreet Capital first reported a position in TUSK in Q1 2017 and has held it in 4 quarters since. The position peaked at $1.48M in Q2 2017. 94 funds tracked by Wall St. Rank hold TUSK as of Q2 2026.

Arrowstreet Capital held 290,096 shares of Mammoth Energy Services worth $943K as of Q2 2026.
Mammoth Energy Services was a new Arrowstreet Capital position in Q2 2026.
Mammoth Energy Services made up ﹤0.01% of Arrowstreet Capital's portfolio in Q2 2026, its #1652 holding.
Arrowstreet Capital first reported a position in Mammoth Energy Services in Q1 2017 and has held it in 4 quarters since.
Arrowstreet Capital's Mammoth Energy Services position peaked at $1.48M in Q2 2017.
94 funds tracked by Wall St. Rank held Mammoth Energy Services as of Q2 2026.

Based on Arrowstreet Capital's 13F filing for Q2 2026, filed 13 Aug 2026.