| Insider | Role | Shares | Value | Buys | Sells |
|---|---|---|---|---|---|
| Date | Ticker | Insider | Role | Type | Shares | Price | Value | Chg% | SEC |
|---|---|---|---|---|---|---|---|---|---|
| Insider | Role | Shares | Value | Buys | Sells |
|---|---|---|---|---|---|
| Date | Ticker | Insider | Role | Type | Shares | Price | Value | Chg% | SEC |
|---|---|---|---|---|---|---|---|---|---|
Chief Executive Officer
1 company
John D Quisel is Chief Executive Officer at IRON. John D Quisel's net worth is not public. Form 4 filings only show shares in the companies where this person is an insider; those holdings are worth an estimated $21.3M at current prices.
Historically, John D Quisel's trades have earned a below-average insider score of 48/100 across 10 rated trades. Over a 12-month horizon, none of those trades were profitable, with an average 12-month return of -29.1%.
The IRON filings lean toward selling, a net 244,461 shares.
John D Quisel has 26 Form 4 filings on record from December 2022 to September 2026, across 2 companies: Director at Gossamer Bio (GOSS), 2023–2026; Chief Executive Officer at Disc Medicine (IRON), 2022–2026.
The 56 reported transactions were 27 open-market sales, 17 option exercises, 9 option or other derivative awards and 3 stock awards.
Counted by filing, the open-market trades come to no purchases and 11 sales worth about $17.4M.
The largest open-market sale was 40,000 shares of IRON at an average $93.05 on December 11, 2025, about $3.7M.
9 of the 11 sales since April 2023 were made under a Rule 10b5-1 trading plan; the other 2 were not.
| Date | Ticker | Role | Type | Shares | Price | Value | Chg% | 3M | 12M | SEC |
|---|---|---|---|---|---|---|---|---|---|---|
| Aug 17, 2026 | IRON Disc Medicine, Inc. | Chief Executive Officer | Sale+OE10b5-1 | 33,000 | $79.15 | $2,611,982.32 | -12.7% | - | - | |
| Jul 13, 2026 | IRON Disc Medicine, Inc. | Chief Executive Officer | Sale+OE10b5-1 | 33,000 | $74.96 | $2,473,779.84 | -12.7% | -20.4% | - | |
| Jun 18, 2026 | IRON Disc Medicine, Inc. | Chief Executive Officer | Sale+OE10b5-1 | 34,000 | $70.21 | $2,387,295.70 | -13.1% | -3.1% | - | |
| Feb 17, 2026 | IRON Disc Medicine, Inc. | Chief Executive Officer | Sell | 13,264 | $62.86 | $833,775.04 | -5.5% | +2.0% | - | |
| Dec 11, 2025 | IRON Disc Medicine, Inc. | Chief Executive Officer | Sale+OE10b5-1 | 40,000 | $93.05 | $3,721,931.19 | -18.9% | -31.8% | - | |
| Jul 9, 2025 | IRON Disc Medicine, Inc. | Chief Executive Officer | Sale+OE10b5-1 | 34,800 | $55.33 | $1,925,524.86 | -17.7% | +21.5% | - | |
| Jul 3, 2025 | IRON Disc Medicine, Inc. | Chief Executive Officer | Sale+OE10b5-1 | 5,200 | $55.09 | $286,454.48 | -3.1% | +22.4% | +39.3% | |
| Feb 18, 2025 | IRON Disc Medicine, Inc. | Chief Executive Officer | Sell | 5,574 | $54.58 | $304,228.92 | -3.5% | -9.1% | +18.0% | |
| Dec 30, 2024 | IRON Disc Medicine, Inc. | Chief Executive Officer | Sale+OE10b5-1 | 13,012 | $61.95 | $806,057.55 | -15.3% | -19.4% | +24.8% | |
| Dec 23, 2024 | IRON Disc Medicine, Inc. | Chief Executive Officer | Sale+OE10b5-1 | 19,820 | $63.14 | $1,251,357.22 | -21.6% | -15.8% | +25.1% |