The cluster is led by high-conviction moves from a sovereign wealth fund and a quant manager, suggesting potential upside re-rating. Monitor for follow-on analyst upgrades or short interest reduction as confirmation of shifting sentiment.
Executive Summary
Three major institutions — Fidelity, Norges Bank, and Two Sigma — significantly increased their stakes in Rubrik during Q4 2025, collectively adding $583.6M in new positions. This buying was partially offset by a $43.3M trim from Morgan Stanley. The cluster shows strong institutional conviction, led by a sovereign wealth fund and a quant fund establishing or doubling meaningful positions.
Key Financial Metrics
Institutional Positions
Net institutional flow: $540.3M
▲ Buyers (3)
| Institution | Action | Change | Position Value | Value Δ |
|---|---|---|---|---|
| Fidelity | DOUBLED | +101.3% | $403.2M | $187.7M |
| Norges Bank | NEW | +0% | $345.9M | $345.9M |
| Two Sigma | DOUBLED | +1114% | $54.8M | $49.9M |
▼ Sellers (1)
| Institution | Action | Change | Prev Value | Value Δ |
|---|---|---|---|---|
| Morgan Stanley | TRIM | -26.1% | $138.4M | -$43.3M |
Key Facts
- Fidelity doubled its stake in RBRK, increasing holdings by 101.3% (2.62M → 5.27M shares), adding $187.7M in value.
- Norges Bank initiated a new $345.9M position with 4.52M shares, the largest single new position in the cluster.
- Two Sigma, a quant fund, more than 11x its stake (from 59K to 716.3K shares), adding $49.9M in value.
- Morgan Stanley trimmed its position by 26.1%, reducing holdings by 439,549 shares and $43.3M in value.
Financial Impact
Net institutional inflow of $540.3M ($583.6M bought, $43.3M sold), representing a significant vote of confidence in Rubrik's growth trajectory.
Risk Factors
- Morgan Stanley's trim may indicate caution among some large-cap passive managers.
- Concentration risk if future sentiment shifts — current buying is driven by just three institutions.
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 1 institutional 13F filing from SEC EDGAR.
| Document | Accession Number |
|---|---|
| INST-CLUSTER Data (Synthetic) | inst-cluster-RBRK-2025-Q4 |
Track record builds as more directional reports settle.
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Sep 11, 2026 21d ago | Insider Cluster | $86.65 $106.71 | ▲ +23.15% | ▲ +23.37% | — |
Sep 4, 2026 28d ago | Insider Cluster | $93.67 $100.20 | ▲ +6.97% | ▲ +8.18% | — |
Aug 28, 2026 4w ago | 3 | $93.04 $91.44 | ▼ −1.72% | ▼ −1.58% | — |
Aug 5, 2026 8w ago | Insider Cluster | $84.60 $105.09 | ▲ +24.22% | ▲ +23.01% | — |
Aug 4, 2026 8w ago | Insider Cluster | $84.81 $96.73 | ▲ +14.05% | ▲ +13.70% | — |
Jul 16, 2026 11w ago | Insider Cluster | $79.82 $72.63 | ▼ −9.01% | ▼ −7.34% | — |
Jul 14, 2026 11w ago | Insider Cluster | $88.05 $78.18 | ▼ −11.21% | ▼ −9.91% | — |
Jul 13, 2026 11w ago | 144 | $88.05 $78.18 | ▼ −11.21% | ▼ −9.91% | — |
Jul 8, 2026 12w ago | Insider Cluster | $88.75 $79.82 | ▼ −10.06% | ▼ −9.93% | — |
Jul 1, 2026 13w ago | Insider Cluster | $83.64 $88.75 | ▲ +6.11% | ▲ +5.18% | — |
US Market Status
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