ARM ARM HOLDINGS PLC /UK
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
Actionable Insight
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.
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
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 | ||||
|---|---|---|---|---|---|
|
Jun 4, 2026
5d ago
|
Insider Cluster
| $390.51 awaiting T+5 | awaiting T+5 | — | $346.39 (−11.30%) |
|
May 26, 2026
14d ago
|
Insider Cluster
| $302.71 $402.71 | ▲ +33.03% | ▲ +31.83% | $346.39 (+14.43%) |
|
May 26, 2026
14d ago
|
20-F
| $302.71 $402.71 | ▲ +33.03% | ▲ +31.83% | $346.39 (+14.43%) |
|
May 22, 2026
18d ago
|
Insider Cluster
| $321.22 $408.85 | ▲ +27.28% | ▲ +26.20% | $346.39 (+7.84%) |
|
May 21, 2026
19d ago
|
Insider Cluster
| $306.51 $408.85 | ▲ +33.39% | ▲ +31.71% | $346.39 (+13.01%) |
|
May 20, 2026
20d ago
|
144
| $256.73 $302.71 | ▲ +17.91% | ▲ +16.67% | $346.39 (+34.92%) |
|
May 19, 2026
21d ago
|
Insider Cluster
| $256.73 $335.27 | ▲ +30.59% | ▲ +28.79% | $346.39 (+34.92%) |
|
Apr 22, 2026
6w ago
|
144
| $196.57 $197.52 | ▲ +0.48% | ▲ +0.43% | $346.39 (+76.22%) |
|
Apr 21, 2026
7w ago
|
6-K
| $175.49 $198.65 | ▲ +13.20% | ▲ +12.11% | $346.39 (+97.38%) |
US Market Status
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