InsiderTape plots every Form 4 on the price chart and flags cluster buys, CEO conviction, and first buys in years the moment they file. Start a free 7-day trial, cancel anytime.
START FREE TRIAL →William K Heiden, Director, is a corporate insider tracked by InsiderTape across 2 companies. The public record shows 3 open-market SEC Form 4 transactions: 3 purchases worth $176K and 0 sales worth $0, reported from Nov 10, 23 to Aug 20, 25. Over this period they have been a net buyer.
| Date | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|
| Aug 20, 25 | MGNXMACROGENICS INC | BUY | 49.5K | $1.49 | $74K |
| Aug 19, 25 | MGNXMACROGENICS INC | BUY | 50.5K | $1.52 | $77K |
| Nov 10, 23 | ATRAAtara Biotherapeutics, Inc. | BUY | 100.0K | $0.25 | $25K |