No actionable signal from this cluster. The dollar amounts are immaterial relative to market cap, both sellers are directors (not C-suite), and the sales follow derivative exercises — a classic pattern for tax-covering sales. Monitor next earnings (2.02) for fundamental updates; insider activity alone does not warrant a trade here.
Price Chart
Executive Summary
Two Rubrik directors sold a combined ~$206K in open-market sales over a 3-day window, with Director Thompson executing the bulk (~$142K) across multiple trades at prices between $88.34 and $92.37. The sales follow derivative exercises (non-cash) and represent a trivial 0.001% of the $17.9B market cap — well below the 0.1% materiality threshold. This is routine portfolio diversification by directors, not an informed sell signal, especially given the strong 97% analyst buy rating and the historical calibration showing cluster sells are not predictive for this ticker.
Key Financial Metrics
Key Facts
- Director John Wendell Thompson sold 13,500 shares across 8 trades totaling ~$1.2M in open-market sales on 2026-09-01, but the net cash proceeds were ~$1.2M (all sales were open-market)
- Director Yvonne Wassenaar sold 721 shares at $89.52 for ~$65K on 2026-09-03
- Both directors also exercised/converted derivatives (non-cash transactions) on the same dates, indicating the sales were likely to cover tax obligations or diversify holdings
- Total open-market sale value of ~$1.27M represents ~0.007% of Rubrik's $17.9B market cap — trivial and routine
Financial Impact
~$1.27M in open-market sales by two directors, representing ~0.007% of market cap
Risk Factors
- Insider sales could accelerate if the stock continues to rally post-IPO lockup expirations
- No C-suite participation in this cluster — the absence of CEO/CFO selling is a mildly positive signal
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CLUSTER Data (Synthetic) | cluster-RBRK-1788484001260 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Sep 11, 2026 21d ago | Insider Cluster | $86.65 $106.71 | ▲ +23.15% | ▲ +23.37% | $118.58 (+36.85%) |
Sep 4, 2026 28d ago | Insider Cluster | $93.67 $100.20 | ▲ +6.97% | ▲ +8.18% | $118.58 (+26.59%) |
Aug 28, 2026 4w ago | 3 | $93.04 $91.44 | ▼ −1.72% | ▼ −1.58% | $118.58 (+27.45%) |
Aug 5, 2026 8w ago | Insider Cluster | $84.60 $105.09 | ▲ +24.22% | ▲ +23.01% | $118.58 (+40.17%) |
Aug 4, 2026 8w ago | Insider Cluster | $84.81 $96.73 | ▲ +14.05% | ▲ +13.70% | $118.58 (+39.82%) |
Jul 16, 2026 11w ago | Insider Cluster | $79.82 $72.63 | ▼ −9.01% | ▼ −7.34% | $118.58 (+48.56%) |
Jul 14, 2026 11w ago | Insider Cluster | $88.05 $78.18 | ▼ −11.21% | ▼ −9.91% | $118.58 (+34.67%) |
Jul 13, 2026 11w ago | 144 | $88.05 $78.18 | ▼ −11.21% | ▼ −9.91% | $118.58 (+34.67%) |
Jul 8, 2026 12w ago | Insider Cluster | $88.75 $79.82 | ▼ −10.06% | ▼ −9.93% | $118.58 (+33.61%) |
Jul 1, 2026 13w ago | Insider Cluster | $83.64 $88.75 | ▲ +6.11% | ▲ +5.18% | $118.58 (+41.77%) |
US Market Status
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