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
Q2 		$28.5K Buy
4,502
+4,064
+928% +$28.9K ﹤0.01% 1367
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 $9.31B AUM 73.66% 1-Year Est. Return
CCPM
Cooper Creek Partners Management New York $4.21B AUM 44.81% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return
Charles Schwab
Charles Schwab San Francisco, California $751B AUM 38.74% 1-Year Est. Return
Northern Trust
Northern Trust Chicago, Illinois $860B AUM 41.15% 1-Year Est. Return

Optiver Holding's RUM Position: Q2 2026 in Review

Optiver Holding increased its RUM Group Inc (RUM) stake by 928% in Q2 2026, buying an estimated $28.9K and bringing the position to 4,502 shares worth $28.5K. The position accounts for ﹤0.01% of the portfolio, ranked #1367.

Optiver Holding first reported a position in RUM in Q3 2024 and has held it in 8 quarters since. 227 funds tracked by Wall St. Rank hold RUM as of Q2 2026.

  • Optiver Holding held 4,502 shares of RUM Group Inc worth $28.5K as of Q2 2026.
  • Optiver Holding bought 4,064 RUM Group Inc shares in Q2 2026, an estimated $28.9K.
  • RUM Group Inc made up ﹤0.01% of Optiver Holding's portfolio in Q2 2026, its #1367 holding.
  • Optiver Holding first reported a position in RUM Group Inc in Q3 2024 and has held it in 8 quarters since.
  • 227 funds tracked by Wall St. Rank held RUM Group Inc as of Q2 2026.

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