Ken Griffin
OS

Ken Griffin’s OneStream Inc OS Stock Holding History

Ken Griffin’s Portfolio OS Stock Details OS Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$45.4M Sell
1,890,118
-382,193
-17% -$8.96M 0.01% 1448
2025
Q4 		$41.8M Buy
2,272,311
+1,871,452
+467% +$35.7M 0.01% 1586
2025
Q3 		$7.39M Sell
400,859
-809,254
-67% -$17.8M ﹤0.01% 3709
2025
Q2 		$34.2M Buy
1,210,113
+457,843
+61% +$11.4M 0.01% 1553
2025
Q1 		$16.1M Buy
752,270
+23,820
+3% +$611K ﹤0.01% 2284
2024
Q4 		$20.8M Buy
728,450
+197,175
+37% +$6.05M ﹤0.01% 2126
2024
Q3 		$18M Buy
+531,275
New +$15.7M ﹤0.01% 2154

Other funds holding OS

GCL
Glazer Capital LLC New York $4.71B AUM 81.93% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Temasek Holdings
Temasek Holdings Singapore $37.3B AUM 12.6% 1-Year Est. Return
Fidelity International
Fidelity International Hamilton, Bermuda $139B AUM 29.06% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
AA
AQR Arbitrage Greenwich, Connecticut $6.09B AUM 26.7% 1-Year Est. Return
NAM
Nexpoint Asset Management Dallas, Texas $1.49B AUM 61.08% 1-Year Est. Return
OCAI
O'Connor Alternative Investments New York $1.17B AUM
PAMP
Polar Asset Management Partners Toronto, Ontario, Canada $5.01B AUM 35.02% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return

Ken Griffin's OS Position: Q1 2026 in Review

Ken Griffin reduced its OneStream Inc (OS) stake by 17% in Q1 2026, selling an estimated $8.96M and leaving 1,890,118 shares worth $45.4M. The position accounts for 0.01% of the portfolio, ranked #1448.

Ken Griffin first reported a position in OS in Q3 2024 and has held it in 7 quarters since. 180 funds tracked by Wall St. Rank hold OS as of Q1 2026.

  • Ken Griffin held 1,890,118 shares of OneStream Inc worth $45.4M as of Q1 2026.
  • Ken Griffin sold 382,193 OneStream Inc shares in Q1 2026, an estimated $8.96M.
  • OneStream Inc made up 0.01% of Ken Griffin's portfolio in Q1 2026, its #1448 holding.
  • Ken Griffin first reported a position in OneStream Inc in Q3 2024 and has held it in 7 quarters since.
  • 180 funds tracked by Wall St. Rank held OneStream Inc as of Q1 2026.

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