The insider selling is routine in both dollar amount and pattern — CTO sales follow derivative conversions and are spread across days, consistent with a 10b5-1 plan. No actionable signal for traders. Monitor next 10-Q for any change in insider selling patterns or a material increase in volume.
Price Chart
Executive Summary
A cluster of insider selling at Rubrik (RBRK) over the past week, led by CTO Arvind Nithrakashyap selling ~$3.5M in open-market transactions alongside two directors selling $207K. The CTO's sales follow derivative conversions and are spread across multiple days, consistent with a pre-arranged 10b5-1 plan or tax-related selling rather than a single bearish conviction. At $18.4B market cap, the total open-market sales of ~$3.7M represent ~0.02% of market cap — well below the 0.1% materiality threshold — making this a routine, non-informative cluster.
Key Financial Metrics
Key Facts
- CTO Arvind Nithrakashyap sold ~$3.5M in open-market sales across Sep 8-10, 2026, following derivative conversions of 12,820 shares each day
- Two directors sold a combined $207K on Sep 1 and Sep 3, 2026
- Total open-market sales of ~$3.7M represent ~0.02% of RBRK's $18.4B market cap
- No insider buying in the cluster — all transactions are sells or non-cash derivative conversions
- The CTO's sales are spread across multiple days and follow derivative exercises, consistent with a 10b5-1 plan or tax-withholding pattern
Financial Impact
Total insider sales of ~$3.7M, or ~0.02% of market cap — immaterial relative to company size
Risk Factors
- If the CTO's selling pattern accelerates or other C-suite executives join the selling, it could signal reduced confidence
- No insider buying to offset the selling — a one-sided sell cluster, though immaterial in size
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-1789087653607 |
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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