MF
OS

Magnetar Financial’s OneStream Inc OS Stock Holding History

Magnetar Financial’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
2025
Q4 		– Sell
-10,920
Closed -$201K – 1266
2025
Q3 		$201K Buy
10,920
+1,220
+13% +$26.8K ﹤0.01% 772
2025
Q2 		$275K Sell
9,700
-3,455
-26% -$86K ﹤0.01% 726
2025
Q1 		$281K Buy
+13,155
New +$337K ﹤0.01% 586

Other funds holding OS

Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $153B AUM 38.14% 1-Year Est. Return
Norges Bank
Norges Bank Oslo, Norway $1T AUM
Kayne Anderson Rudnick Investment Management
Kayne Anderson Rudnick Investment Management Los Angeles, California $32.2B AUM 10.98% 1-Year Est. Return
Temasek Holdings
Temasek Holdings Singapore $37.3B AUM 12.6% 1-Year Est. Return
DPCM
Darlington Partners Capital Management Greenbrae, California $2.27B AUM 18.22% 1-Year Est. Return
Brown Advisory
Brown Advisory Baltimore, Maryland $64.6B AUM 18.98% 1-Year Est. Return
Marshall Wace
Marshall Wace London, United Kingdom $127B AUM 46.06% 1-Year Est. Return
TCM
TimesSquare Capital Management New York $6.8B AUM 45.85% 1-Year Est. Return
Fuller & Thaler Asset Management
Fuller & Thaler Asset Management San Mateo, California $36.7B AUM 74.15% 1-Year Est. Return

Magnetar Financial's OS Position: Q4 2025 in Review

Magnetar Financial sold out of OneStream Inc (OS) in Q4 2025, closing a stake of 10,920 shares — an estimated $201K sold.

Magnetar Financial first reported a position in OS in Q1 2025 and held it in 3 quarters. The position peaked at $281K in Q1 2025. 183 funds tracked by Wall St. Rank hold OS as of Q4 2025.

  • Magnetar Financial reported no remaining OneStream Inc position as of Q4 2025 after selling out during the quarter.
  • Magnetar Financial sold 10,920 OneStream Inc shares in Q4 2025, an estimated $201K.
  • Magnetar Financial first reported a position in OneStream Inc in Q1 2025 and held it in 3 quarters.
  • Magnetar Financial's OneStream Inc position peaked at $281K in Q1 2025.
  • 183 funds tracked by Wall St. Rank held OneStream Inc as of Q4 2025.

Based on Magnetar Financial's 13F filing for Q4 2025, filed 17 Feb 2026.