Collins Spencer Insider Trading Activity
Collins Spencer has been net-selling over the last 12 months with 0 purchases and 9 sales across 1 company.
ARM is the most-traded position with 9 trades. The largest single transaction was a sale of ARM for $8.8M on May 19, 2026.
Performance Scorecard
Forward stock performance after each transaction by Collins Spencer. Buy returns measure price movement after open-market purchases; sell-avoided measures the loss avoided after open-market sales. Success rate counts trades where the insider's direction was right.
| PERIOD | AVG BUY RETURN | AVG SELL AVOIDED | SUCCESS RATE | TRADES |
|---|---|---|---|---|
| 30 days | — | -52.2% | 0% | 9 |
| 90 days | — | — | — | — |
| 120 days | — | — | — | — |
Performance based on stock price movement after each transaction date. Past results do not predict future returns. Not financial advice.
Price & Trades
Pro: Trade MarkersARM · ARM HOLDINGS PLC /UK
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| DATE | TICKER | TYPE | SHARES | PRICE | VALUE | Δ OWNED | ROLE | FILING |
|---|---|---|---|---|---|---|---|---|
May 19, 2026 | ARM | Sell | 40,941 | $215.00 | $8.8M | −100.0% | Chief Legal Officer | |
May 11, 2026 | ARM | Sell | 836 | $207.77 | $174K | −1.6% | Chief Legal Officer | |
May 11, 2026 | ARM | Sell | 1,849 | $208.68 | $386K | −3.6% | Chief Legal Officer | |
May 11, 2026 | ARM | Sell | 5,353 | $209.52 | $1.1M | −10.9% | Chief Legal Officer | |
May 11, 2026 | ARM | Sell | 9,815 | $210.53 | $2.1M | −22.3% | Chief Legal Officer | |
May 11, 2026 | ARM | Sell | 10,674 | $211.46 | $2.3M | −31.3% | Chief Legal Officer | |
May 11, 2026 | ARM | Sell | 11,197 | $212.51 | $2.4M | −47.8% | Chief Legal Officer | |
May 11, 2026 | ARM | Sell | 7,371 | $213.59 | $1.6M | −60.2% | Chief Legal Officer | |
May 11, 2026 | ARM | Sell | 4,866 | $214.41 | $1.0M | −100.0% | Chief Legal Officer |
Top Companies Traded
| TICKER | COMPANY | TRADES | TOTAL VOLUME |
|---|---|---|---|
| ARM | ARM HOLDINGS PLC /UK | 9 | $19.8M |
Other insiders at ARM HOLDINGS PLC /UK
4 other tracked filers at ARM.