Janus Henderson Group
OS

Janus Henderson Group’s OneStream Inc OS Stock Holding History

Janus Henderson 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
-29,294
Closed -$539K – 2476
2025
Q4 		$539K Hold
29,294
– – ﹤0.01% 1990
2025
Q3 		$540K Hold
29,294
– – ﹤0.01% 1967
2025
Q2 		$828K Buy
29,294
+14,294
+95% +$356K ﹤0.01% 1706
2025
Q1 		$329K Hold
15,000
– – ﹤0.01% 2167
2024
Q4 		$428K Buy
+15,000
New +$460K ﹤0.01% 2108

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

Janus Henderson Group's OS Position: Q1 2026 in Review

Janus Henderson Group sold out of OneStream Inc (OS) in Q1 2026, closing a stake of 29,294 shares — an estimated $539K sold.

Janus Henderson Group first reported a position in OS in Q4 2024 and held it in 5 quarters. The position peaked at $828K in Q2 2025. 180 funds tracked by Wall St. Rank hold OS as of Q1 2026.

  • Janus Henderson Group reported no remaining OneStream Inc position as of Q1 2026 after selling out during the quarter.
  • Janus Henderson Group sold 29,294 OneStream Inc shares in Q1 2026, an estimated $539K.
  • Janus Henderson Group first reported a position in OneStream Inc in Q4 2024 and held it in 5 quarters.
  • Janus Henderson Group's OneStream Inc position peaked at $828K in Q2 2025.
  • 180 funds tracked by Wall St. Rank held OneStream Inc as of Q1 2026.

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