Ken Griffin
RBRK icon

Ken Griffin’s Rubrik RBRK Stock Holding History

Ken Griffin’s Portfolio RBRK Stock Details RBRK Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$25M Sell
510,100
-1,406,100
-73% -$80.7M ﹤0.01% 2058
2025
Q4 		$147M Buy
1,916,200
+1,310,800
+217% +$101M 0.02% 640
2025
Q3 		$49.8M Buy
605,400
+219,800
+57% +$18.9M 0.01% 1379
2025
Q2 		$34.5M Buy
385,600
+160,900
+72% +$12.7M 0.01% 1542
2025
Q1 		$13.7M Buy
224,700
+93,600
+71% +$6.39M ﹤0.01% 2472
2024
Q4 		$8.57M Buy
131,100
+99,600
+316% +$4.92M ﹤0.01% 3185
2024
Q3 		$1.01M Sell
31,500
-32,100
-50% -$1.06M ﹤0.01% 6846
2024
Q2 		$1.95M Buy
+63,600
New +$2.09M ﹤0.01% 5367

Other funds holding RBRK

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
First Trust Advisors
First Trust Advisors Wheaton, Illinois $170B AUM 46.21% 1-Year Est. Return
VOYA Investment Management
VOYA Investment Management Atlanta, Georgia $116B AUM 61.47% 1-Year Est. Return
PC
PointState Capital New York $7.9B AUM 42.31% 1-Year Est. Return
Pictet Asset Management
Pictet Asset Management Carouge, Switzerland $105B AUM 38.07% 1-Year Est. Return
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

Ken Griffin's RBRK Position: Q1 2026 in Review

Ken Griffin increased its Rubrik (RBRK) stake by 27% in Q1 2026, buying an estimated $8.92M and bringing the position to 731,217 shares worth $35.8M. The position accounts for 0.01% of the portfolio, ranked #1676.

Ken Griffin first reported a position in RBRK in Q2 2024 and has held it in 8 quarters since. The position peaked at $220M in Q3 2025. 463 funds tracked by Wall St. Rank hold RBRK as of Q1 2026.

  • Ken Griffin held 731,217 shares of Rubrik worth $35.8M as of Q1 2026.
  • Ken Griffin bought 155,344 Rubrik shares in Q1 2026, an estimated $8.92M.
  • Rubrik made up 0.01% of Ken Griffin's portfolio in Q1 2026, its #1676 holding.
  • Ken Griffin first reported a position in Rubrik in Q2 2024 and has held it in 8 quarters since.
  • Ken Griffin's Rubrik position peaked at $220M in Q3 2025.
  • 463 funds tracked by Wall St. Rank held Rubrik as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.