Marshall Wace’s Mammoth Energy Services TUSK Stock Holding History

Marshall Wace’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	$1.29M	Buy	+395,583	New	+$1.16M	﹤0.01%	2079
2026 Q1	–	Sell	-30,801	Closed	-$57K	–	3690
2025 Q4	$57K	Sell	30,801 -13,716	-31%	-$27.7K	﹤0.01%	2768
2025 Q3	$102K	Sell	44,517 -12,919	-22%	-$31.8K	﹤0.01%	2658
2025 Q2	$161K	Buy	+57,436	New	+$147K	﹤0.01%	2491
2025 Q1	–	Sell	-14,163	Closed	-$42.5K	–	3107
2024 Q4	$42.5K	Buy	+14,163	New	+$52.2K	﹤0.01%	2492
2023 Q2	–	Sell	-86,135	Closed	-$363K	–	2975
2023 Q1	$363K	Sell	86,135 -76,593	-47%	-$456K	﹤0.01%	2230
2022 Q4	$1.41M	Buy	162,728 +7,829	+5%	+$44.6K	﹤0.01%	1922
2022 Q3	$528K	Sell	154,899 -54,333	-26%	-$189K	﹤0.01%	2698
2022 Q2	$460K	Buy	209,232 +166,737	+392%	+$374K	﹤0.01%	2827
2022 Q1	$91K	Buy	+42,495	New	+$77.1K	﹤0.01%	3207
2019 Q2	–	Sell	-182,530	Closed	-$3.04M	–	1851
2019 Q1	$3.04M	Buy	182,530 +166,409	+1,032%	+$3.55M	0.03%	625
2018 Q4	$290K	Buy	+16,121	New	+$396K	﹤0.01%	1227

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

JHU

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

BCM

Bridgeway Capital Management Houston, Texas $5.69B AUM 60.64% 1-Year Est. Return

Marshall Wace's TUSK Position: Q2 2026 in Review

Marshall Wace opened a new position in Mammoth Energy Services (TUSK) in Q2 2026: 395,583 shares worth $1.29M. The stake represents ﹤0.01% of the portfolio and ranks #2079 among its holdings. This is a return to the name: Marshall Wace previously reported a position in TUSK as recently as Q4 2025.

Marshall Wace first reported a position in TUSK in Q4 2018 and has held it in 12 quarters since. The position peaked at $3.04M in Q1 2019. 93 funds tracked by Wall St. Rank hold TUSK as of Q2 2026.

Marshall Wace held 395,583 shares of Mammoth Energy Services worth $1.29M as of Q2 2026.
Mammoth Energy Services was a new Marshall Wace position in Q2 2026.
Mammoth Energy Services made up ﹤0.01% of Marshall Wace's portfolio in Q2 2026, its #2079 holding.
Marshall Wace first reported a position in Mammoth Energy Services in Q4 2018 and has held it in 12 quarters since.
Marshall Wace's Mammoth Energy Services position peaked at $3.04M in Q1 2019.
93 funds tracked by Wall St. Rank held Mammoth Energy Services as of Q2 2026.

Based on Marshall Wace's 13F filing for Q2 2026, filed 13 Aug 2026.