John D. Quisel, CEO of Disc Medicine, Inc. ($IRON), sold common shares on the open market eight times in the last year for a total of $6.77 million. His most recent sale occurred on February 17, 2026. These transactions rank 1539th by value among 11,678 insiders, compared to an average of $8.59 million per seller across about 6.4 trades. Quisel 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feb. 17, 2026 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | S | Common Stock | 13264 | $62.86 | 226,064.0000 | 37,750,162 | 5.54% | 0.04% |
| Feb. 10, 2026 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | A | Stock Option (Right to Buy) | 82800 | $0.00 | 82,800.0000 | 37,750,162 | 9999.99% | 0.22% |
| Feb. 10, 2026 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | A | Common Stock | 55200 | $0.00 | 239,328.0000 | 37,750,162 | 29.98% | 0.15% |
| Dec. 19, 2025 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | M | Stock Option (Right to Buy) | 12300 | $0.00 | 186,120.0000 | 37,750,162 | 6.20% | 0.03% |
| Dec. 19, 2025 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | M | Common Stock | 12300 | $1.01 | 184,128.0000 | 37,750,162 | 7.16% | 0.03% |
| Dec. 11, 2025 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | S | Common Stock | 16356 | $92.96 | 188,716.0000 | 37,750,162 | 7.98% | 0.04% |
| Dec. 11, 2025 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | S | Common Stock | 16888 | $93.65 | 171,828.0000 | 37,750,162 | 8.95% | 0.04% |
| Dec. 11, 2025 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | M | Stock Option (Right to Buy) | 40000 | $0.00 | 75,375.0000 | 37,750,162 | 34.67% | 0.11% |
| Dec. 11, 2025 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | M | Common Stock | 40000 | $9.86 | 211,828.0000 | 37,750,162 | 23.28% | 0.11% |
| Dec. 11, 2025 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | S | Common Stock | 2419 | $90.97 | 209,409.0000 | 37,750,162 | 1.14% | 0.01% |
| Dec. 11, 2025 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | S | Common Stock | 4337 | $92.21 | 205,072.0000 | 37,750,162 | 2.07% | 0.01% |
| Sept. 9, 2025 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | M | Stock Option (Right to Buy) | 10000 | $0.00 | 198,420.0000 | 34,569,042 | 4.80% | 0.03% |
| Sept. 9, 2025 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | M | Common Stock | 10000 | $1.01 | 171,828.0000 | 34,569,042 | 6.18% | 0.03% |
| July 9, 2025 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | S | Common Stock | 3593 | $56.20 | 161,828.0000 | 34,569,042 | 2.17% | 0.01% |
| July 9, 2025 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | M | Stock Option (Right to Buy) | 34800 | $0.00 | 115,375.0000 | 34,569,042 | 23.17% | 0.10% |
| July 9, 2025 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | S | Common Stock | 31207 | $55.23 | 165,421.0000 | 34,569,042 | 15.87% | 0.09% |
| July 9, 2025 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | M | Common Stock | 34800 | $9.86 | 196,628.0000 | 34,569,042 | 21.50% | 0.10% |
| July 3, 2025 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | M | Common Stock | 5200 | $9.86 | 167,028.0000 | 34,569,042 | 3.21% | 0.02% |
| July 3, 2025 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | M | Stock Option (Right to Buy) | 5200 | $0.00 | 150,175.0000 | 34,569,042 | 3.35% | 0.02% |
| July 3, 2025 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | S | Common Stock | 5200 | $55.09 | 161,828.0000 | 34,569,042 | 3.11% | 0.02% |
| June 25, 2025 | Gossamer Bio, Inc. | $GOSS | Quisel John D | Director | A | Stock Option (Right to Buy) | 115000 | $0.00 | 115,000.0000 | 227,221,261 | 9999.99% | 0.05% |
| April 7, 2025 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | M | Common Stock | 7000 | $1.01 | 161,828.0000 | 34,569,042 | 4.52% | 0.02% |
| April 7, 2025 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | M | Stock Option (Right to Buy) | 7000 | $0.00 | 208,420.0000 | 34,569,042 | 3.25% | 0.02% |
| Feb. 18, 2025 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | S | Common Stock | 5574 | $54.58 | 154,828.0000 | 0 | 3.48% | 0.00% |
| Feb. 10, 2025 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | A | Stock Option (Right to Buy) | 117505 | $0.00 | 117,505.0000 | 0 | 9999.99% | 0.00% |
| Feb. 10, 2025 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | A | Common Stock | 78337 | $0.00 | 160,402.0000 | 0 | 95.46% | 0.00% |
| Dec. 30, 2024 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | M | Common Stock | 13012 | $9.86 | 85,077.0000 | 0 | 18.06% | 0.00% |
| Dec. 31, 2024 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | M | Stock Option (Right to Buy) | 10000 | $0.00 | 215,420.0000 | 0 | 4.44% | 0.00% |
| Dec. 30, 2024 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | M | Stock Option (Right to Buy) | 13012 | $0.00 | 155,375.0000 | 0 | 7.73% | 0.00% |
| Dec. 31, 2024 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | M | Common Stock | 10000 | $1.01 | 82,065.0000 | 0 | 13.88% | 0.00% |
| Dec. 30, 2024 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | S | Common Stock | 1900 | $62.41 | 72,065.0000 | 0 | 2.57% | 0.00% |
| Dec. 30, 2024 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | S | Common Stock | 11112 | $61.87 | 73,965.0000 | 0 | 13.06% | 0.00% |
| Dec. 23, 2024 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | S | Common Stock | 12194 | $63.12 | 76,277.0000 | 0 | 13.78% | 0.00% |
| Dec. 23, 2024 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | S | Common Stock | 4212 | $63.80 | 72,065.0000 | 0 | 5.52% | 0.00% |
| Dec. 23, 2024 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | S | Common Stock | 3414 | $62.38 | 88,471.0000 | 0 | 3.72% | 0.00% |
| Dec. 23, 2024 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | M | Stock Option (Right to Buy) | 19820 | $0.00 | 41,830.0000 | 0 | 32.15% | 0.00% |
| Dec. 23, 2024 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | M | Common Stock | 19820 | $2.65 | 91,885.0000 | 0 | 27.50% | 0.00% |
| Dec. 16, 2024 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | M | Stock Option (Right to Buy) | 12791 | $0.00 | 225,420.0000 | 0 | 5.37% | 0.00% |
| Dec. 16, 2024 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | S | Common Stock | 500 | $67.20 | 72,065.0000 | 0 | 0.69% | 0.00% |
| Dec. 16, 2024 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | S | Common Stock | 219 | $64.66 | 84,637.0000 | 0 | 0.26% | 0.00% |
| Dec. 16, 2024 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | M | Common Stock | 12791 | $1.01 | 84,856.0000 | 0 | 17.75% | 0.00% |
| Dec. 16, 2024 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | S | Common Stock | 5767 | $65.58 | 78,870.0000 | 0 | 6.81% | 0.00% |
| Dec. 16, 2024 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | S | Common Stock | 6305 | $66.35 | 72,565.0000 | 0 | 7.99% | 0.00% |
| July 8, 2024 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | M | Common Stock | 3000 | $1.01 | 72,065.0000 | 0 | 4.34% | 0.00% |
| July 8, 2024 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | M | Stock Option (Right to Buy) | 3000 | $0.00 | 238,211.0000 | 0 | 1.24% | 0.00% |
| June 6, 2024 | Gossamer Bio, Inc. | $GOSS | Quisel John D | Director | A | Non-qualified stock option (Right to Buy) | 115000 | $0.00 | 115,000.0000 | 0 | 9999.99% | 0.00% |
| Jan. 10, 2024 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | A | Stock Option (Right to Buy) | 99550 | $0.00 | 99,550.0000 | 0 | 9999.99% | 0.00% |
| Jan. 10, 2024 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | A | Common Stock | 66365 | $0.00 | 69,065.0000 | 0 | 2457.96% | 0.00% |
| Dec. 29, 2023 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | M | Stock Option (Right to Buy) | 2700 | $0.00 | 241,211.0000 | 0 | 1.11% | 0.00% |
| Dec. 29, 2023 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | M | Common Stock | 2700 | $1.01 | 2,700.0000 | 0 | 9999.99% | 0.00% |
| Nov. 28, 2023 | Gossamer Bio, Inc. | $GOSS | Quisel John D | Director | A | Stock Option (Right to Buy) | 230000 | $0.00 | 230,000.0000 | 0 | 9999.99% | 0.00% |
| Dec. 29, 2022 | Disc Medicine, Inc. | $IRON | Quisel John D | Chief Executive Officer | A | Stock Option (Right to Buy) | 132002 | $0.00 | 132,002.0000 | 0 | 9999.99% | 0.00% |