Disc Medicine IRON Insider Ownership

Updated Oct 10, 2026

In the last 12 months, insiders at Disc Medicine made open-market sales of $114.56 million (1.41Mn shares) and bought no shares on the open market.

• By number of insiders, Disc Medicine saw 8 insiders sell on the open market over the past 12 months and none buy.
• Ai Dmi LLC (10% owner) was the top open-market seller of Disc Medicine over the past 12 months, with $59.87 million sold (744.05K shares) and the latest sale on October 22, 2025.
• The latest open-market trade on record is a sale of 27.14K shares for $1.9 million by Kevin Bitterman (Director) on September 11, 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 4.24Mn shares across insiders' latest Form 4 filings, or 10.96% of the 38.69Mn shares outstanding; that total is down 0.47% from 4.26Mn shares at the end of Q2 2026.
• Of the 4.24Mn shares held by Disc Medicine insiders, 3.41Mn shares (80.39%) are held directly and 831.06K shares (19.61%) 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, 644.52K shares) and John D. Quisel (Chief Executive Officer, 262.06K shares), based on their latest Form 4 filings.
• Ai Dmi LLC alone accounts for 66.39% of the shares held by Disc Medicine insiders.
• In the past year, 14 insiders of Disc Medicine submitted 50 Form 4 filings reporting trades, awards or other transactions.
• The insider holdings and trades above for Disc Medicine reflect Form 4 filings through September 16, 2026.