Optiver Holding
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Optiver Holding’s REX American Resources REX Stock Holding History

Optiver Holding’s Portfolio REX Stock Details REX Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q4 		– Sell
-388
Closed -$11.9K – 2900
2025
Q3 		$11.9K Buy
+388
New +$11.1K ﹤0.01% 1189

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Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
Renaissance Technologies
Renaissance Technologies New York $63.9B AUM 45.56% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
SFM
Systematic Financial Management Teaneck, New Jersey $4.36B AUM 40.56% 1-Year Est. Return
MP
Mangrove Partners Greenwich, Connecticut $1.24B AUM 41.74% 1-Year Est. Return
Brown Advisory
Brown Advisory Baltimore, Maryland $60.9B AUM 15.24% 1-Year Est. Return
American Century Companies
American Century Companies Kansas City, Missouri $194B AUM 35% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Optiver Holding's REX Position: Q4 2025 in Review

Optiver Holding sold out of REX American Resources (REX) in Q4 2025, closing a stake of 388 shares — an estimated $11.9K sold.

Optiver Holding first reported a position in REX in Q3 2025 and held it in 1 quarter. The position peaked at $11.9K in Q3 2025. 202 funds tracked by Wall St. Rank hold REX as of Q4 2025.

  • Optiver Holding reported no remaining REX American Resources position as of Q4 2025 after selling out during the quarter.
  • Optiver Holding sold 388 REX American Resources shares in Q4 2025, an estimated $11.9K.
  • Optiver Holding first reported a position in REX American Resources in Q3 2025 and held it in 1 quarter.
  • Optiver Holding's REX American Resources position peaked at $11.9K in Q3 2025.
  • 202 funds tracked by Wall St. Rank held REX American Resources as of Q4 2025.

Based on Optiver Holding's 13F filing for Q4 2025, filed 17 Feb 2026.