SEI Investments’s Mammoth Energy Services TUSK Stock Holding History

SEI Investments’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	–	Sell	-13,579	Closed	-$33.3K	–	3408
2026 Q1	$33.3K	Buy	+13,579	New	+$30.9K	﹤0.01%	3199
2019 Q4	–	Sell	-70,000	Closed	-$174K	–	2448
2019 Q3	$174K	Buy	70,000 +9,668	+16%	+$45.9K	﹤0.01%	2262
2019 Q2	$415K	Buy	60,332 +45,532	+308%	+$579K	﹤0.01%	1989
2019 Q1	$246K	Buy	+14,800	New	+$316K	﹤0.01%	2201
2018 Q4	–	Sell	-229	Closed	-$6K	–	2669
2018 Q3	$6K	Sell	229 -8,268	-97%	-$272K	﹤0.01%	2443
2018 Q2	$288K	Buy	+8,497	New	+$299K	﹤0.01%	1946
2018 Q1	–	Sell	-4,943	Closed	-$97K	–	3671
2017 Q4	$97K	Sell	4,943 -31,932	-87%	-$582K	﹤0.01%	2152
2017 Q3	$622K	Buy	36,875 +5,355	+17%	+$78.2K	﹤0.01%	1582
2017 Q2	$586K	Buy	31,520 +10,825	+52%	+$202K	﹤0.01%	1582
2017 Q1	$445K	Sell	20,695 -12,000	-37%	-$229K	﹤0.01%	1603
2016 Q4	$497K	Buy	+32,695	New	+$484K	﹤0.01%	1578

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

SEI Investments's TUSK Position: Q2 2026 in Review

SEI Investments sold out of Mammoth Energy Services (TUSK) in Q2 2026, closing a stake of 13,579 shares — an estimated $33.3K sold.

SEI Investments first reported a position in TUSK in Q4 2016 and held it in 11 quarters. The position peaked at $622K in Q3 2017. 94 funds tracked by Wall St. Rank hold TUSK as of Q2 2026.

SEI Investments reported no remaining Mammoth Energy Services position as of Q2 2026 after selling out during the quarter.
SEI Investments sold 13,579 Mammoth Energy Services shares in Q2 2026, an estimated $33.3K.
SEI Investments first reported a position in Mammoth Energy Services in Q4 2016 and held it in 11 quarters.
SEI Investments's Mammoth Energy Services position peaked at $622K in Q3 2017.
94 funds tracked by Wall St. Rank held Mammoth Energy Services as of Q2 2026.

Based on SEI Investments's 13F filing for Q2 2026, filed 14 Aug 2026.