RBRK
Rubrik, Inc. · Technology · Software - Infrastructure
Momentum inputs (comparable managers):
holder breadth -6.2% ·
share flow +6.6% ·
net new positions -6.7%
· formula
Concentrated accumulation: rising shares among fewer holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q1 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 | Norges Bank ✦ (passive) | 3.09M | -27.2% | $188.53M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 2 | D. E. Shaw & Co. ✦ | 2.31M | +62.1% | $140.75M | 0.2% | ▲ Add | 2 | SEC ↗ ×2 |
| 3 | Renaissance Technologies ✦ | 1.38M | +39.9% | $84.24M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 4 | Millennium Management ✦ | 1.11M | +1.9% | $67.60M | 0.1% | ▲ Add | 4 | SEC ↗ |
| 5 | Citadel Advisors ✦ | 1.03M | +46.0% | $63.01M | 0.1% | ▲ Add | 4 | SEC ↗ ×2 |
| 6 | Arrowstreet Capital ✦ | 987.29K | +194.5% | $60.21M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 7 | Geode Capital Management ✦ (passive) | 939.44K | +30.6% | $57.32M | 0.0% | ▲ Add | 4 | SEC ↗ ×2 |
| 8 | Altimeter Capital ✦ | 832.00K | -49.3% | $50.74M | 1.0% | ▼ Trim | 4 | SEC ↗ |
| 9 | State Street Global Advisors ✦ (passive) | 738.98K | +38.7% | $45.06M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 10 | T. Rowe Price ✦ | 473.19K | +97.0% | $28.86M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 11 | Two Sigma Investments ✦ | 445.54K | -31.4% | $27.17M | 0.1% | ▼ Trim | 4 | SEC ↗ |
| 12 | ARK Investment Management ✦ | 394.28K | -5.2% | $24.04M | 0.2% | ▼ Trim | 4 | SEC ↗ |
| 13 | Marshall Wace ✦ | 343.62K | +1413.8% | $20.95M | 0.0% | ▲ Add | 4 | SEC ↗ ×3 |
| 14 | Point72 Asset Management ✦ | 321.92K | +26.9% | $19.63M | 0.1% | ▲ Add | 3 | SEC ↗ |
| 15 | Gotham Asset Management ✦ | 12.65K | +152.0% | $771,336 | 0.0% | ▲ Add | 2 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value: the conviction measure. ✦ = curated manager.
New buyers
| No new tracked buyers this quarter. |
Exited
| Tiger Global Management | $16.34M | was 0.1% |
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