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 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 $690M AUM 57.92% 1-Year Est. Return

Adage Capital Partners Boston, Massachusetts $64.8B AUM 42.7% 1-Year Est. Return

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return

PLC

Peapod Lane Capital Bedford Hills, New York $122M AUM 67.29% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

BCM

Bridgeway Capital Management Houston, Texas $4.97B AUM 44.96% 1-Year Est. Return

Citadel Advisors Miami, Florida $618B AUM 30.34% 1-Year Est. Return

SEI Investments's TUSK Position: Q1 2026 in Review

SEI Investments opened a new position in Mammoth Energy Services (TUSK) in Q1 2026: 13,579 shares worth $33.3K. The stake represents ﹤0.01% of the portfolio and ranks #3199 among its holdings. This is a return to the name: SEI Investments previously reported a position in TUSK as recently as Q3 2019.

SEI Investments first reported a position in TUSK in Q4 2016 and has held it in 11 quarters since. The position peaked at $622K in Q3 2017. 90 funds tracked by Wall St. Rank hold TUSK as of Q1 2026.

SEI Investments held 13,579 shares of Mammoth Energy Services worth $33.3K as of Q1 2026.
Mammoth Energy Services was a new SEI Investments position in Q1 2026.
Mammoth Energy Services made up ﹤0.01% of SEI Investments's portfolio in Q1 2026, its #3199 holding.
SEI Investments first reported a position in Mammoth Energy Services in Q4 2016 and has held it in 11 quarters since.
SEI Investments's Mammoth Energy Services position peaked at $622K in Q3 2017.
90 funds tracked by Wall St. Rank held Mammoth Energy Services as of Q1 2026.

Based on SEI Investments's 13F filing for Q1 2026, filed 13 May 2026.