Wellington Management Group’s Mammoth Energy Services TUSK Stock Holding History

Wellington Management Group’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	$154K	Sell	47,486 -20,929	-31%	-$61.2K	﹤0.01%	1911
2026 Q1	$168K	Buy	68,415 +12,017	+21%	+$27.4K	﹤0.01%	1849
2025 Q4	$104K	Hold	56,398	–	–	﹤0.01%	1903
2025 Q3	$129K	Sell	56,398 -58,814	-51%	-$145K	﹤0.01%	1960
2025 Q2	$323K	Buy	115,212 +53,413	+86%	+$137K	﹤0.01%	1868
2025 Q1	$126K	Buy	61,799 +12,238	+25%	+$32.6K	﹤0.01%	1914
2024 Q4	$149K	Buy	49,561 +1,490	+3%	+$5.49K	﹤0.01%	1909
2024 Q3	$197K	Buy	+48,071	New	+$176K	﹤0.01%	1894
2018 Q4	–	Sell	-8,755	Closed	-$255K	–	2203
2018 Q3	$255K	Sell	8,755 -59,677	-87%	-$1.97M	﹤0.01%	2153
2018 Q2	$2.32M	Buy	+68,432	New	+$2.4M	﹤0.01%	1685

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

Wellington Management Group's TUSK Position: Q2 2026 in Review

Wellington Management Group reduced its Mammoth Energy Services (TUSK) stake by 31% in Q2 2026, selling an estimated $61.2K and leaving 47,486 shares worth $154K. The position accounts for ﹤0.01% of the portfolio, ranked #1911.

Wellington Management Group first reported a position in TUSK in Q2 2018 and has held it in 10 quarters since. The position peaked at $2.32M in Q2 2018. 94 funds tracked by Wall St. Rank hold TUSK as of Q2 2026.

Wellington Management Group held 47,486 shares of Mammoth Energy Services worth $154K as of Q2 2026.
Wellington Management Group sold 20,929 Mammoth Energy Services shares in Q2 2026, an estimated $61.2K.
Mammoth Energy Services made up ﹤0.01% of Wellington Management Group's portfolio in Q2 2026, its #1911 holding.
Wellington Management Group first reported a position in Mammoth Energy Services in Q2 2018 and has held it in 10 quarters since.
Wellington Management Group's Mammoth Energy Services position peaked at $2.32M in Q2 2018.
94 funds tracked by Wall St. Rank held Mammoth Energy Services as of Q2 2026.

Based on Wellington Management Group's 13F filing for Q2 2026, filed 14 Aug 2026.