Wellington Management Group
OS

Wellington Management Group’s OneStream Inc OS Stock Holding History

Wellington Management Group’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 		– Sell
-1,342,754
Closed -$24.7M – 2030
2025
Q4 		$24.7M Buy
1,342,754
+81,202
+6% +$1.55M ﹤0.01% 963
2025
Q3 		$23.3M Buy
+1,261,552
New +$27.7M ﹤0.01% 966

Other funds holding OS

GCL
Glazer Capital LLC New York $4.71B AUM 81.93% 1-Year Est. Return
Vanguard Portfolio Management
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
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
AA
AQR Arbitrage Greenwich, Connecticut $7.02B AUM 31.58% 1-Year Est. Return
NAM
Nexpoint Asset Management Dallas, Texas $1.5B AUM 83.46% 1-Year Est. Return
OCAI
O'Connor Alternative Investments New York $1.37B AUM
PAMP
Polar Asset Management Partners Toronto, Ontario, Canada $6.07B AUM 34.81% 1-Year Est. Return
Millennium Management
Millennium Management New York $276B AUM 44.8% 1-Year Est. Return

Wellington Management Group's OS Position: Q1 2026 in Review

Wellington Management Group sold out of OneStream Inc (OS) in Q1 2026, closing a stake of 1,342,754 shares — an estimated $24.7M sold.

Wellington Management Group first reported a position in OS in Q3 2025 and held it in 2 quarters. The position peaked at $24.7M in Q4 2025. 180 funds tracked by Wall St. Rank hold OS as of Q1 2026.

  • Wellington Management Group reported no remaining OneStream Inc position as of Q1 2026 after selling out during the quarter.
  • Wellington Management Group sold 1,342,754 OneStream Inc shares in Q1 2026, an estimated $24.7M.
  • Wellington Management Group first reported a position in OneStream Inc in Q3 2025 and held it in 2 quarters.
  • Wellington Management Group's OneStream Inc position peaked at $24.7M in Q4 2025.
  • 180 funds tracked by Wall St. Rank held OneStream Inc as of Q1 2026.

Based on Wellington Management Group's 13F filing for Q1 2026, filed 15 May 2026.