Security record · archived quarter
IRON
Disc Medicine, Inc. · Healthcare · Biotechnology
83Tracked holders
+7Δ holders
22.99MShares held
$1.68BReported value
+9New positions
−2Exits
Momentum inputs (comparable managers):
holder breadth +9.2% ·
share flow +3.0% ·
net new positions +8.4%
— formula
Broad accumulation — rising shares across more holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q2 2026
Ownership over time
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 83 | +7 | 22.99M | $1.68B | +9 | −2 |
| Q1 2026 | 79 | +1 | 22.38M | $1.43B | +7 | −6 |
| Q4 2025 | 77 | -1 | 22.10M | $1.75B | +1 | −2 |
| Q3 2025 | 17 | +3 | 15.61M | $1.03B | +3 | — |
| Q2 2025 | 11 | -1 | 11.75M | $622.02M | +1 | −2 |
| Q1 2025 | 9 | -1 | 6.07M | $301.51M | — | −1 |
| Q4 2024 | 10 | +3 | 5.16M | $327.26M | +3 | — |
| Q3 2024 | 6 | -1 | 5.16M | $253.75M | — | −1 |
| Q2 2024 | 7 | — | 5.00M | $225.18M | — | — |
Who holds it · Q2 2026
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Fidelity (FMR) ✦ | 4.89M | -12.4% | $357.98M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 2 | Fidelity (FMR) ✦ | 4.89M | -12.4% | $357.98M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 3 | Fidelity (FMR) ✦ | 4.89M | -12.4% | $357.98M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 4 | Fidelity (FMR) ✦ | 4.89M | -12.4% | $357.98M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 5 | Fidelity (FMR) ✦ | 4.89M | -12.4% | $357.98M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 6 | BlackRock ✦ (passive) | 2.47M | +8.5% | $180.50M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 7 | BlackRock ✦ (passive) | 2.47M | +8.5% | $180.50M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 8 | BlackRock ✦ (passive) | 2.47M | +8.5% | $180.50M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 9 | BlackRock ✦ (passive) | 2.47M | +8.5% | $180.50M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 10 | BlackRock ✦ (passive) | 2.47M | +8.5% | $180.50M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 11 | BlackRock ✦ (passive) | 2.47M | +8.5% | $180.50M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 12 | BlackRock ✦ (passive) | 2.47M | +8.5% | $180.50M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 13 | BlackRock ✦ (passive) | 2.47M | +8.5% | $180.50M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 14 | BlackRock ✦ (passive) | 2.47M | +8.5% | $180.50M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 15 | BlackRock ✦ (passive) | 2.47M | +8.5% | $180.50M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 16 | BlackRock ✦ (passive) | 2.47M | +8.5% | $180.50M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 17 | BlackRock ✦ (passive) | 2.47M | +8.5% | $180.50M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 18 | JPMorgan Chase ✦ | 1.88M | +36.8% | $139.87M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 19 | JPMorgan Chase ✦ | 1.88M | +36.8% | $139.87M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 20 | JPMorgan Chase ✦ | 1.88M | +36.8% | $139.87M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 21 | JPMorgan Chase ✦ | 1.88M | +36.8% | $139.87M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 22 | JPMorgan Chase ✦ | 1.88M | +36.8% | $139.87M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 23 | T. Rowe Price ✦ | 1.88M | +21.0% | $137.17M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 24 | T. Rowe Price ✦ | 1.88M | +21.0% | $137.17M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 25 | Wellington Management ✦ | 1.74M | +0.3% | $127.36M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 26 | Wellington Management ✦ | 1.74M | +0.3% | $127.36M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 27 | Wellington Management ✦ | 1.74M | +0.3% | $127.36M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 28 | Wellington Management ✦ | 1.74M | +0.3% | $127.36M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 29 | Wellington Management ✦ | 1.74M | +0.3% | $127.36M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 30 | Wellington Management ✦ | 1.74M | +0.3% | $127.36M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 31 | Wellington Management ✦ | 1.74M | +0.3% | $127.36M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 32 | State Street Global Advisors ✦ (passive) | 1.65M | -2.9% | $120.60M | 0.0% | ▼ Trim | 7 | SEC ↗ |
| 33 | Vanguard Capital Management Llc | 1.37M | -0.5% | $100.13M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 34 | Geode Capital Management ✦ (passive) | 789.72K | +6.1% | $57.77M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 35 | Geode Capital Management ✦ (passive) | 789.72K | +6.1% | $57.77M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 36 | Assenagon Asset Management S.A. | 768.32K | +40.6% | $56.19M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 37 | Assenagon Asset Management S.A. | 768.32K | +40.6% | $56.19M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 38 | Dimensional Fund Advisors Lp | 569.02K | +44.3% | $41.62M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 39 | Dimensional Fund Advisors Lp | 569.02K | +44.3% | $41.62M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 40 | Dimensional Fund Advisors Lp | 569.02K | +44.3% | $41.62M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 41 | Dimensional Fund Advisors Lp | 569.02K | +44.3% | $41.62M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 42 | Dimensional Fund Advisors Lp | 569.02K | +44.3% | $41.62M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 43 | Jennison Associates Llc | 439.52K | -28.0% | $32.15M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 44 | Aberdeen Group plc | 438.17K | +16.7% | $32.05M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 45 | Pictet Asset Management Holding SA | 385.38K | -0.4% | $28.19M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 46 | Loomis Sayles & Co L P | 381.86K | +20.4% | $27.93M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 47 | Loomis Sayles & Co L P | 381.86K | +20.4% | $27.93M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 48 | Northern Trust Corp | 264.99K | +7.2% | $19.38M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 49 | Northern Trust Corp | 264.99K | +7.2% | $19.38M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 50 | Northern Trust Corp | 264.99K | +7.2% | $19.38M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 51 | Northern Trust Corp | 264.99K | +7.2% | $19.38M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 52 | Northern Trust Corp | 264.99K | +7.2% | $19.38M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 53 | Charles Schwab Investment… | 257.38K | +2.5% | $18.82M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 54 | Citadel Advisors ✦ | 209.31K | +113.7% | $15.31M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 55 | Citadel Advisors ✦ | 209.31K | +113.7% | $15.31M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 56 | Bank of New York Mellon Corp | 204.73K | -0.1% | $14.97M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 57 | Bank of New York Mellon Corp | 204.73K | -0.1% | $14.97M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 58 | Bank of New York Mellon Corp | 204.73K | -0.1% | $14.97M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 59 | Bank of New York Mellon Corp | 204.73K | -0.1% | $14.97M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 60 | Bank of New York Mellon Corp | 204.73K | -0.1% | $14.97M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 61 | Bank of New York Mellon Corp | 204.73K | -0.1% | $14.97M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 62 | Bank of New York Mellon Corp | 204.73K | -0.1% | $14.97M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 63 | Bank of New York Mellon Corp | 204.73K | -0.1% | $14.97M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 64 | Bank of New York Mellon Corp | 204.73K | -0.1% | $14.97M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 65 | Bank of New York Mellon Corp | 204.73K | -0.1% | $14.97M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 66 | Bank of New York Mellon Corp | 204.73K | -0.1% | $14.97M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 67 | Bnp Paribas Financial Markets | 184.69K | +44.6% | $13.51M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 68 | Two Sigma Investments ✦ | 136.75K | New | $10.00M | 0.0% | New | 1 | SEC ↗ |
| 69 | Bank Of America Corp /De/ | 135.11K | -19.0% | $9.88M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 70 | Bank Of America Corp /De/ | 135.11K | -19.0% | $9.88M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 71 | Bank Of America Corp /De/ | 135.11K | -19.0% | $9.88M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 72 | Bank Of America Corp /De/ | 135.11K | -19.0% | $9.88M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 73 | Alyeska Investment Group, L.P. | 125.00K | 0.0% | $9.14M | 0.0% | Held | 3 | SEC ↗ |
| 74 | Ensign Peak Advisors, Inc | 122.11K | -36.2% | $8.93M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 75 | UBS AM, a distinct business unit of… | 114.11K | +2.9% | $8.35M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 76 | UBS AM, a distinct business unit of… | 114.11K | +2.9% | $8.35M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 77 | UBS AM, a distinct business unit of… | 114.11K | +2.9% | $8.35M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 78 | UBS AM, a distinct business unit of… | 114.11K | +2.9% | $8.35M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 79 | UBS AM, a distinct business unit of… | 114.11K | +2.9% | $8.35M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 80 | UBS AM, a distinct business unit of… | 114.11K | +2.9% | $8.35M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 81 | UBS Group AG | 110.97K | +12.5% | $8.12M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 82 | UBS Group AG | 110.97K | +12.5% | $8.12M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 83 | UBS Group AG | 110.97K | +12.5% | $8.12M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 84 | Millennium Management ✦ | 106.25K | +27.6% | $7.77M | 0.0% | ▲ Add | 7 | SEC ↗ |
| 85 | Goldman Sachs Group ✦ | 97.38K | -84.8% | $7.12M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 86 | Goldman Sachs Group ✦ | 97.38K | -84.8% | $7.12M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 87 | Morgan Stanley ✦ | 91.59K | -2.8% | $6.70M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 88 | Morgan Stanley ✦ | 91.59K | -2.8% | $6.70M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 89 | Morgan Stanley ✦ | 91.59K | -2.8% | $6.70M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 90 | Morgan Stanley ✦ | 91.59K | -2.8% | $6.70M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 91 | Morgan Stanley ✦ | 91.59K | -2.8% | $6.70M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 92 | Morgan Stanley ✦ | 91.59K | -2.8% | $6.70M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 93 | Hrt Financial Lp | 90.82K | New | $6.64M | 0.0% | New | 1 | SEC ↗ |
| 94 | Raymond James Financial Inc | 77.98K | +74.5% | $5.70M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 95 | Raymond James Financial Inc | 77.98K | +74.5% | $5.70M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 96 | Raymond James Financial Inc | 77.98K | +74.5% | $5.70M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 97 | Raymond James Financial Inc | 77.98K | +74.5% | $5.70M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 98 | Squarepoint Ops LLC | 75.87K | +139.3% | $5.55M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 99 | Nuveen, LLC | 60.36K | +17.5% | $4.41M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 100 | Nuveen, LLC | 60.36K | +17.5% | $4.41M | 0.0% | ▲ Add | 3 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Two Sigma Investments | $10.00M | 0.0% |
| Hrt Financial Lp | $6.64M | 0.0% |
Exited
| Renaissance Technologies | $2.03M | was 0.0% |
| Group One Trading Llc | $703 | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 203 holders, 40.63M shares, $2.48B reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
Frequently co-owned
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.
Open-market purchases (P)
No open-market insider purchases in our coverage window.
Open-market sales (S)
Aug 17
Quisel John D
Officer, Director · 8.40K sh · $656,091
Aug 17
Quisel John D
Officer, Director · 12.71K sh · $1.01M
Aug 17
Quisel John D
Officer, Director · 11.89K sh · $949,162
Aug 12
Yu Jonathan Yen-Wen
Officer · 804 sh · $66,445
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology
Aug 06
SC 13G/A — FMR LLC
Provenance: Ownership from parsed 13F common-stock positions (tracked universe, comparable sets for changes); insider rows from Forms 3/4/5; stakes from Schedules 13D/13G; every filing links to its original on SEC EDGAR.
Reporting period: Q2 2026 ·
Methodology ·
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