Simplex Trading
OS

Simplex Trading’s OneStream Inc OS Stock Holding History

Simplex Trading’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 		$182K Sell
7,600
-35,500
-82% -$833K ﹤0.01% 4409
2025
Q4 		$792K Sell
43,100
-15,800
-27% -$301K ﹤0.01% 2852
2025
Q3 		$1.08M Buy
58,900
+47,200
+403% +$1.04M ﹤0.01% 2968
2025
Q2 		$331K Buy
11,700
+8,300
+244% +$207K ﹤0.01% 3957
2025
Q1 		$72K Buy
+3,400
New +$87.2K ﹤0.01% 5423

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 $1.91T AUM
Temasek Holdings
Temasek Holdings Singapore $30.5B AUM 13.98% 1-Year Est. Return
Fidelity International
Fidelity International Hamilton, Bermuda $129B AUM 30.83% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
AA
AQR Arbitrage Greenwich, Connecticut $6.09B AUM 27.01% 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 35.27% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return

Simplex Trading's OS Position: Q1 2026 in Review

Simplex Trading reduced its OneStream Inc (OS) stake by 85% in Q1 2026, selling an estimated $579K and leaving 4,363 shares worth $105K. The position accounts for ﹤0.01% of the portfolio, ranked #5031.

Simplex Trading first reported a position in OS in Q3 2024 and has held it in 5 quarters since. The position peaked at $711K in Q3 2025. 180 funds tracked by Wall St. Rank hold OS as of Q1 2026.

  • Simplex Trading held 4,363 shares of OneStream Inc worth $105K as of Q1 2026.
  • Simplex Trading sold 24,695 OneStream Inc shares in Q1 2026, an estimated $579K.
  • OneStream Inc made up ﹤0.01% of Simplex Trading's portfolio in Q1 2026, its #5031 holding.
  • Simplex Trading first reported a position in OneStream Inc in Q3 2024 and has held it in 5 quarters since.
  • Simplex Trading's OneStream Inc position peaked at $711K in Q3 2025.
  • 180 funds tracked by Wall St. Rank held OneStream Inc as of Q1 2026.

Based on Simplex Trading's 13F filing for Q1 2026, filed 14 May 2026.