Jane Street
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Jane Street’s Mammoth Energy Services TUSK Stock Holding History

Jane Street’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 		$1.65M Buy
506,662
+483,808
+2,117% +$1.42M ﹤0.01% 5527
2026
Q1 		$56K Sell
22,854
-16,798
-42% -$38.2K ﹤0.01% 10929
2025
Q4 		$73.4K Sell
39,652
-12,151
-23% -$24.5K ﹤0.01% 10345
2025
Q3 		$119K Buy
51,803
+34,535
+200% +$85K ﹤0.01% 10048
2025
Q2 		$48.4K Buy
17,268
+5,621
+48% +$14.4K ﹤0.01% 9182
2025
Q1 		$23.8K Sell
11,647
-3,903
-25% -$10.4K ﹤0.01% 9128
2024
Q4 		$46.6K Sell
15,550
-2,994
-16% -$11K ﹤0.01% 8991
2024
Q3 		$75.8K Sell
18,544
-18,554
-50% -$67.9K ﹤0.01% 9084
2024
Q2 		$122K Buy
37,098
+16,433
+80% +$56.4K ﹤0.01% 8657
2024
Q1 		$75.2K Sell
20,665
-4,253
-17% -$16K ﹤0.01% 8641
2023
Q4 		$111K Buy
+24,918
New +$111K ﹤0.01% 8536
2023
Q2 		– Sell
-113,551
Closed -$479K – 9585
2023
Q1 		$479K Buy
113,551
+78,170
+221% +$465K ﹤0.01% 6391
2022
Q4 		$306K Sell
35,381
-3,593
-9% -$20.5K ﹤0.01% 6983
2022
Q3 		$133K Buy
+38,974
New +$136K ﹤0.01% 8482
2022
Q2 		– Sell
-55,535
Closed -$118K – 10913
2022
Q1 		$118K Buy
+55,535
New +$101K ﹤0.01% 9376
2020
Q4 		– Sell
-18,570
Closed -$30K – 8120
2020
Q3 		$30K Sell
18,570
-51,418
-73% -$75.8K ﹤0.01% 6993
2020
Q2 		$83K Buy
+69,988
New +$81.2K ﹤0.01% 6766
2019
Q4 		– Sell
-18,511
Closed -$46K – 5765
2019
Q3 		$46K Buy
+18,511
New +$87.9K ﹤0.01% 4899
2019
Q1 		– Sell
-43,143
Closed -$776K – 5652
2018
Q4 		$776K Buy
43,143
+18,345
+74% +$451K ﹤0.01% 2910
2018
Q3 		$722K Sell
24,798
-21,448
-46% -$707K ﹤0.01% 3162
2018
Q2 		$1.57M Buy
46,246
+39,703
+607% +$1.39M ﹤0.01% 2215
2018
Q1 		$210K Buy
+6,543
New +$164K ﹤0.01% 4413

Other funds holding TUSK

WC
Wexford Capital West Palm Beach, Florida $782M AUM 62.56% 1-Year Est. Return
Adage Capital Partners
Adage Capital Partners Boston, Massachusetts $71.3B AUM 56.8% 1-Year Est. Return
Vanguard Capital Management
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
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
Citadel Advisors
Citadel Advisors Miami, Florida $875B AUM 40.89% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Marshall Wace
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
BCM
Bridgeway Capital Management Houston, Texas $5.69B AUM 60.64% 1-Year Est. Return

Jane Street's TUSK Position: Q2 2026 in Review

Jane Street increased its Mammoth Energy Services (TUSK) stake by 2,117% in Q2 2026, buying an estimated $1.42M and bringing the position to 506,662 shares worth $1.65M. The position accounts for ﹤0.01% of the portfolio, ranked #5527.

Jane Street first reported a position in TUSK in Q1 2018 and has held it in 22 quarters since. 94 funds tracked by Wall St. Rank hold TUSK as of Q2 2026.

  • Jane Street held 506,662 shares of Mammoth Energy Services worth $1.65M as of Q2 2026.
  • Jane Street bought 483,808 Mammoth Energy Services shares in Q2 2026, an estimated $1.42M.
  • Mammoth Energy Services made up ﹤0.01% of Jane Street's portfolio in Q2 2026, its #5527 holding.
  • Jane Street first reported a position in Mammoth Energy Services in Q1 2018 and has held it in 22 quarters since.
  • 94 funds tracked by Wall St. Rank held Mammoth Energy Services as of Q2 2026.

Based on Jane Street's 13F filing for Q2 2026, filed 14 Aug 2026.