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RBRK · NYSE
$114.59+$1.18 (+1.04%)TodayMarket closed ·
Prev close $113.41
Who owns RBRK
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 30.1% of RBRK’s shares.
- AQR Capital Management, LLC4.8%
- Fidelity Management & Research Company LLC4.3%
- BlackRock Institutional Trust Company, N.A.4.1%
- Vanguard Portfolio Management, LLC4.0%
- Next 6 largest institutions13.0%
- All other shareholders69.9%
| Holder | Shares | % of shares |
|---|---|---|
| AQR Capital Management, LLC | 9.95M | 4.83% |
| Fidelity Management & Research Company LLC | 8.77M | 4.26% |
| BlackRock Institutional Trust Company, N.A. | 8.34M | 4.05% |
| Vanguard Portfolio Management, LLC | 8.30M | 4.03% |
| Vanguard Capital Management, LLC | 6.89M | 3.35% |
| First Trust Advisors L.P. | 5.98M | 2.91% |
| Norges Bank Investment Management (NBIM) | 4.07M | 1.98% |
| Voya Investment Management LLC | 4.00M | 1.95% |
| Geode Capital Management, L.L.C. | 2.88M | 1.40% |
| State Street Investment Management (US) | 2.86M | 1.39% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| First Trust Nasdaq Cybersecurity ETF | 4.81M | 2.34% |
| Vanguard Total Stock Market Index Fund | 4.76M | 2.31% |
| Statens Pensjonsfond Utland | 3.84M | 1.87% |
| Vanguard Small-Cap Index Fund | 3.44M | 1.67% |
| Pictet-Security | 3.34M | 1.62% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders sold $45.81M (141 trades) of RBRK on the open market, with no buys.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Nithrakashyap Arvind | Other | 12.82K | — |
| Nithrakashyap Arvind | Sale | 13 | $1.63K |
| Nithrakashyap Arvind | Sale | 3.06K | $381.23K |
| Nithrakashyap Arvind | Sale | 8.27K | $1.03M |
| Nithrakashyap Arvind | Sale | 1.48K | $182.27K |
| Nithrakashyap Arvind | Other | 12.82K | — |
| Nithrakashyap Arvind | Other | 12.82K | — |
| Nithrakashyap Arvind | Sale | 68 | $8.68K |
| Nithrakashyap Arvind | Sale | 1.07K | $135.62K |
| Nithrakashyap Arvind | Sale | 11.10K | $1.40M |
Short interest
Settled Sep 30, 2026
- Shares short
- 13.10M
- Days to cover
- 4.21
- % of shares outstanding
- 6.36%
- Average daily volume
- 3.11M
- Change since last report
- −4.5%
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