Optiver Holding
TUSK icon

Optiver Holding’s Mammoth Energy Services TUSK Stock Holding History

Optiver Holding’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 		– Sell
-200
Closed -$490 – 3091
2026
Q1 		$490 Sell
200
-128
-39% -$291 ﹤0.01% 2167
2025
Q4 		$607 Hold
328
– – ﹤0.01% 2276
2025
Q3 		$751 Buy
+328
New +$808 ﹤0.01% 2531

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
Jane Street
Jane Street New York $1.21T AUM 78.12% 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

Optiver Holding's TUSK Position: Q2 2026 in Review

Optiver Holding sold out of Mammoth Energy Services (TUSK) in Q2 2026, closing a stake of 200 shares — an estimated $490 sold.

Optiver Holding first reported a position in TUSK in Q3 2025 and held it in 3 quarters. The position peaked at $751 in Q3 2025. 93 funds tracked by Wall St. Rank hold TUSK as of Q2 2026.

  • Optiver Holding reported no remaining Mammoth Energy Services position as of Q2 2026 after selling out during the quarter.
  • Optiver Holding sold 200 Mammoth Energy Services shares in Q2 2026, an estimated $490.
  • Optiver Holding first reported a position in Mammoth Energy Services in Q3 2025 and held it in 3 quarters.
  • Optiver Holding's Mammoth Energy Services position peaked at $751 in Q3 2025.
  • 93 funds tracked by Wall St. Rank held Mammoth Energy Services as of Q2 2026.

Based on Optiver Holding's 13F filing for Q2 2026, filed 12 Aug 2026.