Harlan S Robins Insider Trading Activity
Harlan S Robins has been net-selling over the last 12 months with 0 purchases and 11 sales across 1 company.
ADPT is the most-traded position with 11 trades. The largest single transaction was a sale of ADPT for $4.3M on Mar 11, 2026.
Performance Scorecard
Forward stock performance after each transaction by Harlan S Robins. 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 | — | +6.4% | 82% | 11 |
| 90 days | — | -3.2% | 55% | 11 |
| 120 days | — | -12.3% | 60% | 10 |
Performance based on stock price movement after each transaction date. Past results do not predict future returns. Not financial advice.
Price & Trades
Pro: Trade MarkersADPT · Adaptive Biotechnologies Corp
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| DATE | TICKER | TYPE | SHARES | PRICE | VALUE | Δ OWNED | ROLE | FILING |
|---|---|---|---|---|---|---|---|---|
Apr 8, 2026 | ADPT | Sell | 10,000 | $14.85 | $149K | −0.7% | Chief Scientific Officer | |
Mar 11, 2026 | ADPT | Sell | 140,666 | $13.17 | $1.9M | −7.1% | Chief Scientific Officer | |
Mar 11, 2026 | ADPT | Sell | 329,600 | $13.17 | $4.3M | −17.8% | Chief Scientific Officer | |
Mar 3, 2026 | ADPT | Sell | 14,233 | $16.52 | $235K | −1.2% | Chief Scientific Officer | |
Mar 2, 2026 | ADPT | Sell | 10,000 | $15.72 | $157K | −0.8% | Chief Scientific Officer | |
Feb 3, 2026 | ADPT | Sell | 8,120 | $19.00 | $154K | −0.7% | Chief Scientific Officer | |
Feb 2, 2026 | ADPT | Sell | 34,668 | $18.60 | $645K | −2.8% | Chief Scientific Officer | |
Jan 6, 2026 | ADPT | Sell | 10,000 | $16.44 | $164K | −0.8% | Chief Scientific Officer | |
Dec 4, 2025 | ADPT | Sell | 10,000 | $16.61 | $166K | −0.8% | Chief Scientific Officer | |
Dec 3, 2025 | ADPT | Sell | 27,212 | $18.61 | $506K | −2.1% | Chief Scientific Officer | |
Nov 10, 2025 | ADPT | Sell | 10,000 | $14.82 | $148K | −0.8% | Chief Scientific Officer |
Top Companies Traded
| TICKER | COMPANY | TRADES | TOTAL VOLUME |
|---|---|---|---|
| ADPT | Adaptive Biotechnologies Corp | 11 | $8.5M |
Other insiders at Adaptive Biotechnologies Corp
5 other tracked filers at ADPT.