Optiver Holding
RUM icon

Optiver Holding’s RUM Group Inc RUM Stock Holding History

Optiver Holding’s Portfolio RUM Stock Details RUM Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$2.23K Buy
438
+134
+44% +$770 ﹤0.01% 1797
2025
Q4 		$1.92K Sell
304
-259
-46% -$1.78K ﹤0.01% 2041
2025
Q3 		$4.08K Buy
563
+550
+4,231% +$4.5K ﹤0.01% 1929
2025
Q2 		$117 Hold
13
– – ﹤0.01% 1423
2025
Q1 		$92 Hold
13
– – ﹤0.01% 1317
2024
Q4 		$169 Hold
13
– – ﹤0.01% 1024
2024
Q3 		$70 Buy
+13
New +$77 ﹤0.01% 929

Other funds holding RUM

CF
Cantor Fitzgerald New York $6.78B AUM 29.01% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
CCPM
Cooper Creek Partners Management New York $2.92B AUM 30.49% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $871B AUM 31.28% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

Optiver Holding's RUM Position: Q1 2026 in Review

Optiver Holding increased its RUM Group Inc (RUM) stake by 44% in Q1 2026, buying an estimated $770 and bringing the position to 438 shares worth $2.23K. The position accounts for ﹤0.01% of the portfolio, ranked #1797.

Optiver Holding first reported a position in RUM in Q3 2024 and has held it in 7 quarters since. The position peaked at $4.08K in Q3 2025. 204 funds tracked by Wall St. Rank hold RUM as of Q1 2026.

  • Optiver Holding held 438 shares of RUM Group Inc worth $2.23K as of Q1 2026.
  • Optiver Holding bought 134 RUM Group Inc shares in Q1 2026, an estimated $770.
  • RUM Group Inc made up ﹤0.01% of Optiver Holding's portfolio in Q1 2026, its #1797 holding.
  • Optiver Holding first reported a position in RUM Group Inc in Q3 2024 and has held it in 7 quarters since.
  • Optiver Holding's RUM Group Inc position peaked at $4.08K in Q3 2025.
  • 204 funds tracked by Wall St. Rank held RUM Group Inc as of Q1 2026.

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