Monitor for any future Vanguard entity filings to confirm whether aggregate Vanguard ownership in Rubrik is stable. The slight reduction in shares reported by this entity appears to be an internal reallocation, not a net sell-down.
Price Chart
Executive Summary
Vanguard Portfolio Management LLC filed an amendment to its Schedule 13G, disclosing a passive stake of 8,019,927 shares (4.79%) in Rubrik, Inc. as of September 30, 2026. This is a decrease from the prior filing by Vanguard Capital Management LLC (8,226,616 shares, 4.91%), reflecting an internal reallocation within the Vanguard group rather than a change in aggregate Vanguard ownership. The filing is routine and carries no directional signal.
Key Financial Metrics
Key Facts
- Vanguard Portfolio Management LLC reported beneficial ownership of 8,019,927 shares of Rubrik common stock as of September 30, 2026.
- The stake represents 4.79% of shares outstanding.
- This is an amendment to a prior Schedule 13G; the prior filing by Vanguard Capital Management LLC reported 8,226,616 shares (4.91%) as of September 30, 2026.
- The change reflects a reallocation within the Vanguard group, not a net change in aggregate Vanguard ownership.
- Vanguard Portfolio Management LLC is a passive investor filing under Rule 13d-1(b).
Financial Impact
Stake decreased by approximately 206,689 shares (from 8,226,616 to 8,019,927), a reduction of about 2.5% of the prior position. At the snapshot market cap of $28.2B, the stake value is approximately $1.35B.
Risk Factors
- Internal reallocation between Vanguard entities may obscure the true aggregate ownership trend; investors should track total Vanguard group filings.
- No material risk to Rubrik from this passive stake adjustment.
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 3 SEC documents filed with EDGAR.
| Document | Accession Number |
|---|---|
| SC 13G/A Filing (Primary) | 0002100121-26-001091 |
| Document: 0002100121-26-001091-index.html | 0002100121-26-001091 |
| Document: 0002100121-26-001091.txt | 0002100121-26-001091 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Oct 30, 2026 2d ago | SC 13G/A | $120.91 | awaiting T+60 | awaiting T+60 | $124.15 (+2.68%) |
Oct 30, 2026 2d ago | SC 13G/A | $119.64 | awaiting T+60 | awaiting T+60 | $124.15 (+3.77%) |
Oct 23, 2026 9d ago | Institutional Cluster | $128.74 | awaiting T+60 | awaiting T+60 | $124.15 (−3.57%) |
Oct 12, 2026 20d ago | Institutional Cluster | $120.01 | awaiting T+60 | awaiting T+60 | $124.15 (+3.45%) |
Sep 25, 2026 5w ago | 144 | $113.09 | awaiting T+60 | awaiting T+60 | $124.15 (−9.78%) |
Sep 17, 2026 6w ago | Insider Cluster | $106.71 | awaiting T+60 | awaiting T+60 | $124.15 (+16.34%) |
Sep 10, 2026 7w ago | Insider Cluster | $86.65 | awaiting T+60 | awaiting T+60 | $124.15 (+43.28%) |
Sep 3, 2026 8w ago | Insider Cluster | $93.67 | awaiting T+60 | awaiting T+60 | $124.15 (+32.54%) |
Aug 28, 2026 9w ago | 3 | $93.04 | awaiting T+60 | awaiting T+60 | $124.15 (+33.44%) |
Aug 5, 2026 12w ago | Insider Cluster | $84.60 $124.15 | ▲ +46.75% | ▲ +48.42% | $124.15 (+46.75%) |
US Market Status
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