IRON · Insider trading · 13F holders · Congress trades
Disc Medicine, Inc. (IRON)
Who is buying and selling IRON: company insiders on SEC Form 4, hedge funds and superinvestors on Form 13F, and members of Congress under the STOCK Act. Every figure links to the filing or page it comes from.
- 13F filers holding
- 28
- Insider buys, 90 days
- $0
- Insider sales, 90 days
- $13.6M
- Congress trades, 12 months
- 0
IRON at a glance
- Between Aug 1, 2026 and Oct 29, 2026, 4 IRON insiders filed 8 sales worth $13.6M on SEC Form 4, and no open-market purchases; 7 of the sales were pre-planned under Rule 10b5-1.
- 28 13F filers hold IRON among their 50 largest positions, worth $1.2B combined, including Peter Kolchinsky, James Flynn and Julian and Felix Baker. The biggest bets by portfolio weight are Opaleye Management Inc. (5.7%), Saturn V Capital Management LP (5.5%) and Palo Alto Investors LP (4.2%). In their latest 13Fs, 1 manager opened a new position and 7 added to one.
- No member of Congress has disclosed a trade in IRON.
- IRON last closed at $82.84 on Oct 29, 2026.
IRON insider trading
Between Aug 1, 2026 and Oct 29, 2026, 4 IRON insiders filed 8 sales worth $13.6M on SEC Form 4, and no open-market purchases; 7 of the sales were pre-planned under Rule 10b5-1.
| Filed | Insider | Role | Trade | Shares | Price | Value | Form 4 |
|---|---|---|---|---|---|---|---|
| Oct 21, 2026 | Bitterman Kevin | Director | Sale10b5-1 | 41,825 | $80.13 | $3.4M | SEC |
| Sep 15, 2026 | Bitterman Kevin | Director | Sale | 27,136 | $70.11 | $1.9M | SEC |
| Sep 9, 2026 | Bitterman Kevin | Director | Sale10b5-1 | 1,689 | $79.96 | $135K | SEC |
| Sep 3, 2026 | Bitterman Kevin | Director | Sale10b5-1 | 54,496 | $80.15 | $4.4M | SEC |
| Aug 26, 2026 | Yu Jonathan Yen-Wen | Chief Operating Officer | Sale10b5-1 | 9,096 | $83.10 | $756K | SEC |
| Aug 18, 2026 | Quisel John D | Chief Executive Officer, Director | Sale10b5-1 | 33,000 | $79.15 | $2.6M | SEC |
| Aug 14, 2026 | Yu Jonathan Yen-Wen | Chief Operating Officer | Sale10b5-1 | 804 | $82.64 | $66K | SEC |
| Aug 7, 2026 | Khara Rahul | Chief Legal Officer | Sale10b5-1 | 5,000 | $80.00 | $400K | SEC |
Who owns IRON? Hedge funds and superinvestors
28 13F filers hold IRON among their 50 largest positions, worth $1.2B combined, including Peter Kolchinsky, James Flynn and Julian and Felix Baker. The biggest bets by portfolio weight are Opaleye Management Inc. (5.7%), Saturn V Capital Management LP (5.5%) and Palo Alto Investors LP (4.2%). In their latest 13Fs, 1 manager opened a new position and 7 added to one.
Superinvestors holding IRON: Peter Kolchinsky 1.6% · James Flynn 0.6% · Julian and Felix Baker 0.1%
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| Peter KolchinskyHedge fund | 1.6% | $179.2M | 2,450,221 | +0.0% shares | Q2 2026 |
| Vestal Point Capital, LPHedge fund | 2.6% | $113.4M | 1,550,000 | +121.4% shares | Q2 2026 |
| Atlas Venture Life Science Advisors, LLCVenture capital | 12.6% | $110.7M | 1,513,875 | +0.0% shares | Q2 2026 |
| Frazier Life Sciences Management, L.P.Hedge fund | 2.2% | $99.1M | 1,354,852 | +0.0% shares | Q2 2026 |
| TCG Crossover Management, LLCHedge fund | 2.4% | $98.1M | 1,341,862 | +0.0% shares | Q2 2026 |
| Bvf Inc/ilInvestment manager | 2.2% | $84.4M | 1,153,612 | -9.3% shares | Q2 2026 |
| Siren, L.L.C.Investment manager | 1.3% | $65.0M | 888,401 | -10.1% shares | Q2 2026 |
| Logos Global Management LPHedge fund | 2.8% | $64.0M | 875,000 | +56.3% shares | Q2 2026 |
| Opaleye Management Inc.Hedge fund | 5.7% | $62.5M | 855,000 | +103.1% shares | Q2 2026 |
| James FlynnHedge fund | 0.6% | $48.1M | 657,000 | +0.0% shares | Q2 2026 |
| Bellevue Group AGInvestment manager | 0.9% | $41.0M | 560,000 | +21.9% shares | Q2 2026 |
| Saturn V Capital Management LPHedge fund | 5.5% | $38.4M | 524,730 | +16.6% shares | Q2 2026 |
| Armistice Capital, LLCHedge fund | 0.9% | $33.6M | 460,000 | -14.2% shares | Q2 2026 |
| Palo Alto Investors LPHedge fund | 4.2% | $30.5M | 416,646 | +3.7% shares | Q2 2026 |
| Foresite Capital Management V, LLCHedge fund | 7.6% | $27.4M | 374,069 | +0.0% shares | Q2 2026 |
| Julian and Felix BakerHedge fund | 0.1% | $25.6M | 349,657 | +0.0% shares | Q2 2026 |
| Octagon Capital Advisors LPHedge fund | 1.8% | $19.7M | 270,000 | +0.0% shares | Q2 2026 |
| Checkpoint Capital L.P.Hedge fund | 4.5% | $17.6M | 240,125 | -16.2% shares | Q2 2026 |
| Catalio Capital Management, LPHedge fund | 2.2% | $11.7M | 159,384 | +29.6% shares | Q2 2026 |
| Sofinnova Investments, Inc.Hedge fund | 0.6% | $10.7M | 146,239 | +86.7% shares | Q2 2026 |
| Bain Capital Life Sciences Investors, LLCAsset manager | 0.6% | $10.3M | 141,234 | +0.0% shares | Q2 2026 |
| Silverarc Capital Management, LLCHedge fund | 0.7% | $6.1M | 82,800 | -57.8% shares | Q2 2026 |
| Casdin Capital, LLCHedge fund | 0.2% | $4.8M | 65,000 | +0.0% shares | Q2 2026 |
| KVP Capital Advisors, LPHedge fund | 3.1% | $4.3M | 58,250 | +0.0% shares | Q2 2026 |
| NEXTBio Capital Management LPHedge fund | 1.8% | $3.9M | 52,655 | +0.0% shares | Q2 2026 |
| Atle Fund Management ABAsset manager | 0.9% | $3.2M | 43,682 | -59.3% shares | Q2 2026 |
| Lion Point Capital, LPHedge fund | 2.8% | $592K | 8,100 | +0.0% shares | Q2 2026 |
| Foresite Capital Management VI LLCHedge fund | 0.0% | $71K | 970 | New | Q2 2026 |
Each manager counts with its latest 13F (Q2 2026: 28). Screen IRON in the grand portfolio →
IRON stock trades by members of Congress
No member of Congress has disclosed a trade in IRON.
Analysis mentioning IRON
Posts from the blog that cover Disc Medicine, Inc., newest first.
IRON questions and answers
Are insiders buying IRON stock?
Between Aug 1, 2026 and Oct 29, 2026, 4 IRON insiders filed 8 sales worth $13.6M on SEC Form 4, and no open-market purchases; 7 of the sales were pre-planned under Rule 10b5-1.
Which hedge funds own IRON?
28 13F filers hold IRON among their 50 largest positions, worth $1.2B combined, including Peter Kolchinsky, James Flynn and Julian and Felix Baker. The biggest bets by portfolio weight are Opaleye Management Inc. (5.7%), Saturn V Capital Management LP (5.5%) and Palo Alto Investors LP (4.2%). In their latest 13Fs, 1 manager opened a new position and 7 added to one.
Has Congress traded IRON?
No member of Congress has disclosed a trade in IRON.
Who is the largest holder of IRON?
Among 13F filers, Peter Kolchinsky reports the largest IRON position, $179.2M (2,450,221 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is Opaleye Management Inc.'s: 5.7% of its portfolio.
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