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
2019
Q1 		– Sell
-45,000
Closed -$809K – 5653
2018
Q4 		$809K Hold
45,000
– – ﹤0.01% 2863
2018
Q3 		$1.31M Buy
+45,000
New +$1.48M ﹤0.01% 2417

Other funds holding TUSK

WC
Wexford Capital West Palm Beach, Florida $690M AUM 57.92% 1-Year Est. Return
Adage Capital Partners
Adage Capital Partners Boston, Massachusetts $64.8B AUM 42.7% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Dimensional Fund Advisors
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
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
State Street
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
Citadel Advisors Miami, Florida $618B AUM 30.34% 1-Year Est. Return

Jane Street's TUSK Position: Q1 2026 in Review

Jane Street reduced its Mammoth Energy Services (TUSK) stake by 42% in Q1 2026, selling an estimated $38.2K and leaving 22,854 shares worth $56K. The position accounts for ﹤0.01% of the portfolio, ranked #10929.

Jane Street first reported a position in TUSK in Q1 2018 and has held it in 21 quarters since. The position peaked at $1.57M in Q2 2018. 90 funds tracked by Wall St. Rank hold TUSK as of Q1 2026.

  • Jane Street held 22,854 shares of Mammoth Energy Services worth $56K as of Q1 2026.
  • Jane Street sold 16,798 Mammoth Energy Services shares in Q1 2026, an estimated $38.2K.
  • Mammoth Energy Services made up ﹤0.01% of Jane Street's portfolio in Q1 2026, its #10929 holding.
  • Jane Street first reported a position in Mammoth Energy Services in Q1 2018 and has held it in 21 quarters since.
  • Jane Street's Mammoth Energy Services position peaked at $1.57M in Q2 2018.
  • 90 funds tracked by Wall St. Rank held Mammoth Energy Services as of Q1 2026.

Based on Jane Street's 13F filing for Q1 2026, filed 12 May 2026.