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
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 $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 $148M AUM 89.92% 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

Optiver Holding's TUSK Position: Q1 2026 in Review

Optiver Holding reduced its Mammoth Energy Services (TUSK) stake by 39% in Q1 2026, selling an estimated $291 and leaving 200 shares worth $490. The position accounts for ﹤0.01% of the portfolio, ranked #2167.

Optiver Holding first reported a position in TUSK in Q3 2025 and has held it in 3 quarters since. The position peaked at $751 in Q3 2025. 90 funds tracked by Wall St. Rank hold TUSK as of Q1 2026.

  • Optiver Holding held 200 shares of Mammoth Energy Services worth $490 as of Q1 2026.
  • Optiver Holding sold 128 Mammoth Energy Services shares in Q1 2026, an estimated $291.
  • Mammoth Energy Services made up ﹤0.01% of Optiver Holding's portfolio in Q1 2026, its #2167 holding.
  • Optiver Holding first reported a position in Mammoth Energy Services in Q3 2025 and has held it in 3 quarters since.
  • Optiver Holding's Mammoth Energy Services position peaked at $751 in Q3 2025.
  • 90 funds tracked by Wall St. Rank held Mammoth Energy Services as of Q1 2026.

Based on Optiver Holding's 13F filing for Q1 2026, filed 15 May 2026.