OneStream Inc
OS was delisted on the 31st of March, 2026.
180 hedge funds and large institutions have $2.23B invested in OneStream Inc in 2026 Q1 according to their latest regulatory filings, with 85 funds opening new positions, 48 increasing their positions, 34 reducing their positions, and 82 closing their positions.
48% more capital invested
Capital invested by funds: $1.51B → $2.23B (+$726M)
41% more repeat investments, than reductions
Existing positions increased: 48 | Existing positions reduced: 34
9.73% more ownership
Funds ownership: 83.86% → 93.59% (+9.7%)
4% more first-time investments, than exits
New positions opened: 85 | Existing positions closed: 82
1% less funds holding
Funds holding: 182 → 180 (-2)
15% less call options, than puts
Call options by funds: $2.46M | Put options by funds: $2.89M
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
GCL
Glazer Capital LLC
New York
|
+$177M |
| 2 |
Fidelity International
Hamilton,
Bermuda
|
+$93.6M |
| 3 |
AA
AQR Arbitrage
Greenwich,
Connecticut
|
+$79.6M |
| 4 |
NAM
Nexpoint Asset Management
Dallas,
Texas
|
+$78.8M |
| 5 |
PAMP
Polar Asset Management Partners
Toronto,
Ontario, Canada
|
+$69.1M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
T. Rowe Price Investment Management
Baltimore,
Maryland
|
-$143M |
| 2 |
Kayne Anderson Rudnick Investment Management
Los Angeles,
California
|
-$114M |
| 3 |
DPCM
Darlington Partners Capital Management
Greenbrae,
California
|
-$70.6M |
| 4 |
Brown Advisory
Baltimore,
Maryland
|
-$62.1M |
| 5 |
TCM
TimesSquare Capital Management
New York
|
-$49M |
OS Hedge Fund Activity: Q1 2026 in Review
180 of the 8,126 institutional investors tracked by Wall St. Rank reported a position in OneStream Inc (OS) for Q1 2026, worth a combined $2.23B — up 48% from $1.51B a quarter earlier.
Buyers outnumbered sellers: 85 funds opened new OS positions and 82 closed out — a net gain of 3 holders — while 48 added to existing stakes and 34 trimmed.
The largest buyer was Glazer Capital LLC, opening a new position worth an estimated $177M. The largest seller was T. Rowe Price Investment Management, exiting entirely with an estimated $143M sold.
- 180 institutional investors held OneStream Inc (OS) as of Q1 2026, down from 182 in Q4 2025.
- Funds reported $2.23B of OneStream Inc stock for Q1 2026, up 48% quarter-over-quarter.
- 85 funds opened new OneStream Inc positions in Q1 2026 and 82 closed out, a net change of +3 holders.
- The largest OneStream Inc buyer in Q1 2026 was Glazer Capital LLC, an estimated $177M added.
- The largest OneStream Inc seller in Q1 2026 was T. Rowe Price Investment Management, an estimated $143M sold.
Based on aggregated 13F filings for Q1 2026.