Disc Medicine IRON Insider Ownership

Updated Oct 27, 2026

In the last 12 months, insiders at Disc Medicine made open-market sales of $49.99 million (613.64K shares) and bought no shares on the open market.

• By number of insiders, Disc Medicine saw 7 insiders sell on the open market over the past 12 months and none buy.
• Kevin Bitterman (Director) was the top open-market seller of Disc Medicine over the past 12 months, with $26.68 million sold (310.02K shares) and the latest sale on October 21, 2026.
• Apart from open-market trades, IRON insiders received 91.2K shares in stock awards and acquired 316.69K shares through option exercises and conversions in the past 12 months.
• Business Quant data puts insider holdings in IRON at 4.2Mn shares across insiders' latest Form 4 filings, or 10.85% of the 38.69Mn shares outstanding; that total is down 1.45% from 4.26Mn shares at the end of Q2 2026.
• Of the 4.2Mn shares held by Disc Medicine insiders, 3.41Mn shares (81.20%) are held directly and 789.24K shares (18.80%) indirectly, through trusts, partnerships, family members and other entities.
• Holdings in Disc Medicine stock are reported by 9 insiders, the officers, directors and 10% owners who have filed a Form 4 in the past two years.
• Disc Medicine's three biggest insider holders are Ai Dmi LLC (10% owner, 2.81Mn shares), Kevin Bitterman (Director, 602.7K shares) and John D. Quisel (Chief Executive Officer, 262.06K shares), based on their latest Form 4 filings.
• Ai Dmi LLC alone accounts for 67.05% of the shares held by Disc Medicine insiders.
• In the past year, 13 insiders of Disc Medicine submitted 49 Form 4 filings reporting trades, awards or other transactions.
• The insider holdings and trades above for Disc Medicine reflect Form 4 filings through October 21, 2026.