This cluster is routine and non-informative. The dollar amount is negligible relative to ARM's massive market cap, and the sales are likely driven by scheduled vesting/blackout-window openings rather than shared bearish conviction. No action warranted. Monitor next earnings (likely late July/early August) for fundamental updates.
Price Chart
Executive Summary
Five C-suite insiders at ARM sold a total of $23.24M in open-market sales over a 4-day window (May 18-21, 2026). The CFO, Chief Legal Officer, Chief Architect, Chief Commercial Officer, and Chief People Officer all sold, with the CFO alone selling $7.23M and the CLO selling $8.80M. At a $315.9B market cap, the total represents ~0.007% — a trivial fraction — making this a routine liquidity/vesting-driven cluster with no material directional signal.
Key Financial Metrics
Key Facts
- 5 C-suite insiders sold $23.24M total in open-market sales over 4 days (May 18-21, 2026)
- Total sales represent ~0.007% of ARM's $315.9B market cap — well below the 0.1% materiality threshold
- CFO Jason Child sold $7.23M (31,920 shares at $226.54) on May 20
- CLO Spencer Collins sold $8.80M (40,941 shares at $215.00) on May 19
- Chief Architect Richard Grisenthwaite sold $5.09M (24,339 shares at $209.15) on May 18
- No open-market purchases in the cluster — all trades are sales
- Per academic literature, cluster sales are not more informative than non-cluster sales; common vesting/blackout windows drive clustering
Financial Impact
Total insider sales of $23.24M represent ~0.007% of ARM's $315.9B market cap — trivial and routine
Risk Factors
- No material risk from this cluster — sales are trivial relative to market cap
- If a future 8-K reveals unexpected negative news, these sales could be viewed as opportunistic in hindsight, but current data does not support that inference
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CLUSTER Data (Synthetic) | cluster-ARM-1779485028978 |
Track record builds as more directional reports settle.
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Aug 27, 2026 5w ago | 144 | $255.21 $321.31 | ▲ +25.90% | ▲ +26.00% | $306.00 (+19.90%) |
Aug 10, 2026 7w ago | 6-K | $268.93 $264.23 | ▼ −1.75% | ▼ −0.69% | $306.00 (+13.78%) |
Jun 12, 2026 16w ago | Institutional Cluster | $380.81 $323.39 | ▼ −15.08% | ▼ −16.86% | $306.00 (−19.64%) |
Jun 4, 2026 17w ago | Insider Cluster | $342.93 $322.24 | ▼ −6.03% | ▼ −7.89% | $306.00 (−10.77%) |
May 26, 2026 18w ago | Insider Cluster | $302.71 $347.71 | ▲ +14.87% | ▲ +16.77% | $306.00 (+1.09%) |
May 26, 2026 18w ago | 20-F | $302.71 $347.71 | ▲ +14.87% | ▲ +16.77% | $306.00 (+1.09%) |
May 22, 2026 18w ago | Insider Cluster | $321.22 $351.95 | ▲ +9.57% | ▲ +11.51% | $306.00 (−4.74%) |
May 21, 2026 19w ago | Insider Cluster | $306.51 $377.90 | ▲ +23.29% | ▲ +24.71% | $306.00 (−0.17%) |
May 20, 2026 19w ago | 144 | $256.73 $439.46 | ▲ +71.18% | ▲ +70.44% | $306.00 (+19.19%) |
May 19, 2026 19w ago | Insider Cluster | $256.73 $439.46 | ▲ +71.18% | ▲ +70.44% | $306.00 (+19.19%) |
US Market Status
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