Harler Mary Beth, CEO of IGM Biosciences ($IGMS), sold shares on the open market three times in the last year, totaling about $29,300. Her most recent sale occurred on July 23, 2025. These sales rank 10,836th among 11,678 insiders, far below the average of $8.6 million per seller and 6.4 transactions. She made no open market purchases 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. 14, 2025 | IGM Biosciences, Inc. | $IGMS | Harler Mary Beth | Chief Executive Officer | D | Common Stock | 323680 | $0.00 | 0.0000 | 61,816,099 | 100.00% | 0.52% |
| July 23, 2025 | IGM Biosciences, Inc. | $IGMS | Harler Mary Beth | Chief Executive Officer | S | Common Stock | 14501 | $1.27 | 323,680.0000 | 61,816,099 | 4.29% | 0.02% |
| June 16, 2025 | IGM Biosciences, Inc. | $IGMS | Harler Mary Beth | Chief Executive Officer | S | Common Stock | 1522 | $1.20 | 338,181.0000 | 60,514,546 | 0.45% | 0.00% |
| March 14, 2025 | IGM Biosciences, Inc. | $IGMS | Harler Mary Beth | Chief Executive Officer | S | Common Stock | 7329 | $1.23 | 339,703.0000 | 60,514,546 | 2.11% | 0.01% |
| Dec. 16, 2024 | IGM Biosciences, Inc. | $IGMS | Harler Mary Beth | Chief Executive Officer | S | Common Stock | 1708 | $7.48 | 347,032.0000 | 60,434,161 | 0.49% | 0.00% |
| Oct. 2, 2024 | IGM Biosciences, Inc. | $IGMS | Harler Mary Beth | Chief Executive Officer | A | Common Stock | 185000 | $0.00 | 348,740.0000 | 60,434,161 | 112.98% | 0.31% |
| Oct. 2, 2024 | IGM Biosciences, Inc. | $IGMS | Harler Mary Beth | Chief Executive Officer | A | Stock Option (right to buy) | 370000 | $0.00 | 370,000.0000 | 60,434,161 | 9999.99% | 0.61% |
| Sept. 13, 2024 | IGM Biosciences, Inc. | $IGMS | Harler Mary Beth | Head, Research & Autoimmunity | S | Common Stock | 1487 | $11.54 | 163,740.0000 | 60,434,161 | 0.90% | 0.00% |
| July 19, 2024 | IGM Biosciences, Inc. | $IGMS | Harler Mary Beth | Head, Research & Autoimmunity | A | Common Stock | 54999 | $0.00 | 140,226.0000 | 60,434,161 | 64.53% | 0.09% |
| July 19, 2024 | IGM Biosciences, Inc. | $IGMS | Harler Mary Beth | Head, Research & Autoimmunity | A | Common Stock | 25001 | $0.00 | 165,227.0000 | 60,434,161 | 17.83% | 0.04% |
| July 19, 2024 | IGM Biosciences, Inc. | $IGMS | Harler Mary Beth | Head, Research & Autoimmunity | D | Stock Option (right to buy) | 200000 | $0.00 | 0.0000 | 60,434,161 | 100.00% | 0.33% |
| June 14, 2024 | IGM Biosciences, Inc. | $IGMS | Harler Mary Beth | Head, Research & Autoimmunity | S | Common Stock | 1570 | $7.58 | 85,227.0000 | 52,311,958 | 1.81% | 0.00% |