John D. Quisel

Companies

• Gossamer Bio, Inc.Board member Nov 29, 2023 to now¹
• Disc Medicine, Inc.Board member Jan 3, 2023 to now²
• Disc Medicine, Inc.Chief executive officer Jan 3, 2023 to now²
• Acceleron PharmaSVP Gen. Counsel & Secretary Jul 2, 2014 to Jan 3, 2020³
• Acceleron PharmaGeneral counsel Sep 18, 2013 to Jun 17, 2014⁴

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

• DMDisc Medicine, Inc. IRON262,064 shares⁵$14.8M at $56.65Sep 15, 2026

As of each latest filing. The line shows shares held over time.

Recent filings

• Sep 15, 2026Exercised options 36,000 shares at $1.01 of Disc Medicine, Inc.⁵
• Aug 17, 2026Sold 11,888 shares at $79.84 of Disc Medicine, Inc.⁶
• Aug 17, 2026Sold 12,712 shares at $79.20 of Disc Medicine, Inc.⁶
• Aug 17, 2026Sold 8,400 shares at $78.11 of Disc Medicine, Inc.⁶
• Aug 17, 2026Exercised options 33,000 shares at $13.50 of Disc Medicine, Inc.⁶
• Jul 13, 2026Sold 6,400 shares at $76.05 of Disc Medicine, Inc.⁷
• Jul 13, 2026Sold 16,896 shares at $74.95 of Disc Medicine, Inc.⁷
• Jul 13, 2026Sold 9,704 shares at $74.27 of Disc Medicine, Inc.⁷
• Jul 13, 2026Exercised options 7,416 shares at $13.50 of Disc Medicine, Inc.⁷
• Jul 13, 2026Exercised options 25,584 shares at $9.86 of Disc Medicine, Inc.⁷
• Jun 18, 2026Sold 1,551 shares at $71.61 of Disc Medicine, Inc.⁸
• Jun 18, 2026Sold 9,522 shares at $70.70 of Disc Medicine, Inc.⁸
• Jun 18, 2026Sold 22,927 shares at $69.92 of Disc Medicine, Inc.⁸
• Jun 18, 2026Exercised options 34,000 shares at $9.86 of Disc Medicine, Inc.⁸
• Feb 17, 2026Sold 13,264 shares at $62.86 of Disc Medicine, Inc.⁹
• Feb 10, 2026Granted 55,200 shares of Disc Medicine, Inc.¹⁰
• Dec 19, 2025Exercised options 12,300 shares at $1.01 of Disc Medicine, Inc.¹¹
• Dec 11, 2025Sold 16,888 shares at $93.65 of Disc Medicine, Inc.¹²
• Dec 11, 2025Sold 16,356 shares at $92.96 of Disc Medicine, Inc.¹²
• Dec 11, 2025Sold 4,337 shares at $92.21 of Disc Medicine, Inc.¹²
• Dec 11, 2025Sold 2,419 shares at $90.97 of Disc Medicine, Inc.¹²
• Dec 11, 2025Exercised options 40,000 shares at $9.86 of Disc Medicine, Inc.¹²
• Sep 9, 2025Exercised options 10,000 shares at $1.01 of Disc Medicine, Inc.¹³
• Jul 9, 2025Sold 3,593 shares at $56.20 of Disc Medicine, Inc.¹⁴
• Jul 9, 2025Sold 31,207 shares at $55.23 of Disc Medicine, Inc.¹⁴