Jacquelyn L Sumer Insider Trading Activity
Jacquelyn L Sumer has been net-selling over the last 12 months with 0 purchases and 3 sales across 1 company.
CGEM is the most-traded position with 3 trades. The largest single transaction was a sale of CGEM for $52K on Feb 24, 2026.
Performance Scorecard
Forward stock performance after each transaction by Jacquelyn L Sumer. 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 | — | -0.4% | 67% | 3 |
| 90 days | — | -15.1% | 0% | 3 |
| 120 days | — | -55.7% | 0% | 1 |
Performance based on stock price movement after each transaction date. Past results do not predict future returns. Not financial advice.
Price & Trades
Pro: Trade MarkersCGEM · Cullinan Therapeutics, Inc.
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Top Companies Traded
| TICKER | COMPANY | TRADES | TOTAL VOLUME |
|---|---|---|---|
| CGEM | Cullinan Therapeutics, Inc. | 3 | $137K |
Other insiders at Cullinan Therapeutics, Inc.
4 other tracked filers at CGEM.