OS
OneStream, Inc. Class A Common Stock · Technology · Software - Application
Momentum inputs (comparable managers):
holder breadth -16.7% ·
share flow +5.8% ·
net new positions -20.0%
— formula
Concentrated accumulation — rising shares among fewer holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q3 2025
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | The Vanguard Group ✦ (passive) | 8.61M | +10.1% | $158.61M | 0.0% | ▲ Add | 2 | SEC ↗ ×5 |
| 2 | Marshall Wace ✦ | 2.48M | +24.8% | $45.74M | 0.1% | ▲ Add | 5 | SEC ↗ ×3 |
| 3 | BlackRock ✦ (passive) | 2.10M | +2.6% | $38.75M | 0.0% | ▲ Add | 2 | SEC ↗ ×9 |
| 4 | Wellington Management ✦ | 1.26M | New | $23.25M | 0.0% | New | 1 | SEC ↗ ×3 |
| 5 | Morgan Stanley ✦ | 1.15M | — | $21.13M | 0.0% | n/c | 1 | SEC ↗ ×7 |
| 6 | Geode Capital Management ✦ (passive) | 1.03M | +8.4% | $18.92M | 0.0% | ▲ Add | 5 | SEC ↗ ×2 |
| 7 | State Street Global Advisors ✦ (passive) | 720.05K | +7.6% | $13.27M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 8 | Millennium Management ✦ | 703.78K | -10.6% | $12.97M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 9 | Goldman Sachs Group ✦ | 662.89K | — | $12.22M | 0.0% | n/c | 1 | SEC ↗ ×3 |
| 10 | Citadel Advisors ✦ | 400.86K | -66.9% | $7.39M | 0.0% | ▼ Trim | 5 | SEC ↗ ×2 |
| 11 | Soros Fund Management ✦ | 322.60K | -48.5% | $5.95M | 0.1% | ▼ Trim | 5 | SEC ↗ |
| 12 | JPMorgan Chase ✦ | 219.69K | — | $4.05M | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 13 | PRIMECAP Management ✦ | 102.90K | -2.8% | $1.90M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 14 | Fidelity (FMR) ✦ | 46.14K | +1.1% | $850,327 | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 15 | T. Rowe Price ✦ | 17.16K | +70.6% | $317,000 | 0.0% | ▲ Add | 5 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Wellington Management | $23.25M | 0.0% |
Exited
| Norges Bank | $179.52M | was 0.0% |
| D. E. Shaw & Co. | $10.51M | was 0.0% |
| Two Sigma Investments | $1.61M | was 0.0% |
| Arrowstreet Capital | $370,277 | was 0.0% |
| Renaissance Technologies | $260,360 | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 178 holders, 91.55M shares, $1.97B reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.