RBRK
Rubrik, Inc. · Technology · Software - Infrastructure
Momentum inputs (comparable managers):
holder breadth +5.6% ·
share flow +8.6% ·
net new positions +5.3%
· formula
Broad accumulation: rising shares across more holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q2 2025
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q3 2026 | 3 | -1 | 205.23K | $22.72M | n/a | −1 |
| Q2 2026 | 132 | -4 | 98.66M | $7.86B | +10 | −13 |
| Q1 2026 | 138 | -3 | 83.54M | $4.10B | +8 | −12 |
| Q4 2025 | 141 | 0 | 93.71M | $7.16B | +2 | −1 |
| Q3 2025 | 21 | 0 | 43.62M | $3.59B | +3 | −4 |
| Q2 2025 | 19 | +1 | 41.01M | $3.67B | +2 | −1 |
| Q1 2025 | 15 | -1 | 14.41M | $878.86M | n/a | −1 |
| Q4 2024 | 16 | +3 | 13.52M | $883.53M | +3 | n/a |
| Q3 2024 | 12 | +1 | 9.15M | $294.28M | +3 | −2 |
| Q2 2024 | 11 | n/a | 6.38M | $195.52M | n/a | n/a |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | The Vanguard Group ✦ (passive) | 12.02M | n/a | $1.08B | 0.0% | n/c | 1 | SEC ↗ ×5 |
| 2 | BlackRock ✦ (passive) | 8.35M | n/a | $748.46M | 0.0% | n/c | 1 | SEC ↗ ×18 |
| 3 | D. E. Shaw & Co. ✦ | 4.32M | +87.3% | $387.29M | 0.4% | ▲ Add | 3 | SEC ↗ ×2 |
| 4 | Fidelity (FMR) ✦ | 2.97M | n/a | $266.06M | 0.0% | n/c | 1 | SEC ↗ ×4 |
| 5 | Norges Bank ✦ (passive) | 2.45M | -20.9% | $219.13M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 6 | Geode Capital Management ✦ (passive) | 1.95M | +107.5% | $175.05M | 0.0% | ▲ Add | 5 | SEC ↗ ×2 |
| 7 | State Street Global Advisors ✦ (passive) | 1.77M | +139.7% | $158.71M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 8 | Citadel Advisors ✦ | 1.67M | +62.1% | $150.05M | 0.1% | ▲ Add | 5 | SEC ↗ ×2 |
| 9 | Renaissance Technologies ✦ | 1.22M | -11.8% | $109.12M | 0.1% | ▼ Trim | 3 | SEC ↗ |
| 10 | Two Sigma Investments ✦ | 1.13M | +154.7% | $101.65M | 0.2% | ▲ Add | 5 | SEC ↗ |
| 11 | Arrowstreet Capital ✦ | 955.60K | -3.2% | $85.61M | 0.1% | ▼ Trim | 4 | SEC ↗ |
| 12 | Millennium Management ✦ | 903.50K | -18.5% | $80.94M | 0.1% | ▼ Trim | 5 | SEC ↗ |
| 13 | T. Rowe Price ✦ | 608.56K | +28.6% | $54.52M | 0.0% | ▲ Add | 4 | SEC ↗ ×2 |
| 14 | Marshall Wace ✦ | 310.20K | -9.7% | $27.79M | 0.0% | ▼ Trim | 5 | SEC ↗ ×2 |
| 15 | ARK Investment Management ✦ | 263.61K | -33.1% | $23.62M | 0.2% | ▼ Trim | 5 | SEC ↗ |
| 16 | Adage Capital Partners ✦ | 65.00K | New | $5.82M | 0.0% | New | 1 | SEC ↗ |
| 17 | Point72 Asset Management ✦ | 29.91K | -90.7% | $2.68M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 18 | Gotham Asset Management ✦ | 7.41K | -41.4% | $663,772 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 19 | Soros Fund Management ✦ | 6.67K | New | $597,744 | 0.0% | New | 1 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value: the conviction measure. ✦ = curated manager.
New buyers
| Adage Capital Partners | $5.82M | 0.0% |
| Soros Fund Management | $597,744 | 0.0% |
Exited
| Altimeter Capital | $50.74M | was 1.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 459 holders, 113.97M shares, $5.39B 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.
Open-market purchases (P)
No open-market insider purchases in our coverage window.
Open-market sales (S)
Officer, Director · 3.06K sh · $381,233
Officer, Director · 13 sh · $1,632
Officer, Director · 1.48K sh · $182,267
Officer, Director · 8.27K sh · $1.03M
Officer, Director · 68 sh · $8,684
Officer, Director · 1.07K sh · $135,624
Officer, Director · 11.10K sh · $1.40M
Officer, Director · 582 sh · $72,954
Officer, Director · 2.91K sh · $360,629
Officer, Director · 5.60K sh · $688,744
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology