Disc Medicine (IRON) Director Kevin Bitterman Sells 54,496 Shares

What Happened

• Kevin Bitterman, a director of Disc Medicine (ticker: IRON), disposed of 54,496 shares in multiple open-market sales between September 1 and September 3, 2026, for total proceeds of about $4.37 million. Major blocks on September 2 included sales of 26,542 and 22,090 shares at roughly $80.17 per share (together ≈ $3.90M). Smaller lots were sold on Sept 1 and Sept 3 at prices in the ~$79.95–$81.01 range.

Key Details

• Transaction dates: Sept 1–3, 2026; Form 4 filed Sept 3, 2026.
• Shares sold: 54,496 total; approximate proceeds $4,367,945 (rounded ≈ $4.37M).
• Price range: roughly $79.95 to $81.01 (several weighted-average prices reported; specific ranges disclosed in footnotes).
• Shares owned after the transactions: not provided in the data supplied here.
• Notable footnotes:
  • F1: Many of the sales were made pursuant to a Rule 10b5-1 trading plan adopted July 30, 2026.
  • F2–F4: Some shares are held by Atlas venture funds; Bitterman is a member of related general partner entities and disclaims beneficial ownership of those fund-held shares except to the extent of any pecuniary interest.
  • F5–F7: Several reported prices are weighted averages covering multiple execution prices; the filer offers to provide per-price breakdowns on request.
• Filing timeliness: Form filed on Sept 3, 2026; transactions occurred Sept 1–3. (No late-filing flag was provided here.)

Context

• These were sales, not purchases — sales are often routine (especially when executed under 10b5-1 plans) and do not by themselves indicate the director’s private view of the company’s prospects.
• The presence of Atlas-managed fund holdings and the reporting-person’s disclaimer means some shares are institutional fund holdings, not directly beneficially owned by the director for voting or dispositive power, except for any pecuniary interest.
• If you track insider signals, purchases generally carry more weight than pre-scheduled sales; note the 10b5-1 plan disclosure when assessing whether these trades were prearranged.