William K. Heiden, a director at MacroGenics Inc. ($MGNX), made two open market purchases of company shares in the last 365 days, totaling about $151,000. His most recent buy occurred on August 20, 2025. These purchases rank him 1809th among nearly 5,000 individual insiders by purchase value, below the average of $1.46 million across about 3.3 transactions per insider. Heiden reported no open market sales during this period.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Aug. 20, 2025 | MACROGENICS INC | $MGNX | HEIDEN WILLIAM K | Director | P | Common Stock | 49500 | $1.49 | 111,000.0000 | 62,621,185 | 80.49% | 0.08% |
| Aug. 19, 2025 | MACROGENICS INC | $MGNX | HEIDEN WILLIAM K | Director | P | Common Stock | 50500 | $1.52 | 61,500.0000 | 62,621,185 | 459.09% | 0.08% |
| June 10, 2025 | Atara Biotherapeutics, Inc. | $ATRA | HEIDEN WILLIAM K | Not found | A | Common Stock | 7828 | $0.00 | 22,188.0000 | 7,488,000 | 54.51% | 0.10% |
| May 21, 2025 | MACROGENICS INC | $MGNX | HEIDEN WILLIAM K | Director | A | Restricted Stock Unit | 3750 | $0.00 | 3,750.0000 | 62,621,185 | 9999.99% | 0.01% |
| May 21, 2025 | MACROGENICS INC | $MGNX | HEIDEN WILLIAM K | Director | A | Stock Option (right to buy) | 22000 | $0.00 | 22,000.0000 | 62,621,185 | 9999.99% | 0.04% |
| May 20, 2025 | MACROGENICS INC | $MGNX | HEIDEN WILLIAM K | Director | M | Common Stock | 6500 | $0.00 | 11,000.0000 | 62,621,185 | 144.44% | 0.01% |
| May 20, 2025 | MACROGENICS INC | $MGNX | HEIDEN WILLIAM K | Director | M | Restricted Stock Unit | 6500 | $0.00 | 0.0000 | 62,621,185 | 100.00% | 0.01% |
| May 21, 2024 | MACROGENICS INC | $MGNX | HEIDEN WILLIAM K | Director | A | Restricted Stock Unit | 6500 | $0.00 | 6,500.0000 | 61,929,198 | 9999.99% | 0.01% |
| May 21, 2024 | MACROGENICS INC | $MGNX | HEIDEN WILLIAM K | Director | A | Stock Option (right to buy) | 16500 | $0.00 | 16,500.0000 | 61,929,198 | 9999.99% | 0.03% |
| May 20, 2024 | MACROGENICS INC | $MGNX | HEIDEN WILLIAM K | Director | M | Common Stock | 4500 | $0.00 | 4,500.0000 | 61,929,198 | 9999.99% | 0.01% |
| May 20, 2024 | MACROGENICS INC | $MGNX | HEIDEN WILLIAM K | Director | M | Restricted Stock Unit | 4500 | $0.00 | 0.0000 | 61,929,198 | 100.00% | 0.01% |
| March 31, 2024 | Atara Biotherapeutics, Inc. | $ATRA | HEIDEN WILLIAM K | Not found | A | Common Stock | 150000 | $0.00 | 359,000.0000 | 4,236,000 | 71.77% | 3.54% |
| Nov. 10, 2023 | Atara Biotherapeutics, Inc. | $ATRA | HEIDEN WILLIAM K | Not found | P | Common Stock | 100000 | $0.25 | 209,000.0000 | 0 | 91.74% | 0.00% |
| May 31, 2023 | Atara Biotherapeutics, Inc. | $ATRA | HEIDEN WILLIAM K | Not found | A | Common Stock | 57000 | $0.00 | 109,000.0000 | 0 | 109.62% | 0.00% |
| May 31, 2023 | MACROGENICS INC | $MGNX | HEIDEN WILLIAM K | Director | A | Restricted Stock Unit | 4500 | $0.00 | 4,500.0000 | 61,433,124 | 9999.99% | 0.01% |
| May 31, 2023 | Atara Biotherapeutics, Inc. | $ATRA | HEIDEN WILLIAM K | Not found | A | Non-Qualified Stock Option (Right to Buy) | 79500 | $0.00 | 79,500.0000 | 0 | 9999.99% | 0.00% |
| May 31, 2023 | MACROGENICS INC | $MGNX | HEIDEN WILLIAM K | Director | A | Stock Option (right to buy) | 19000 | $0.00 | 19,000.0000 | 61,433,124 | 9999.99% | 0.03% |