Security record
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 ↗ ×5 |
| 2 | BlackRock ✦ (passive) | 2.47M | +8.5% | $180.50M | 0.0% | ▲ Add | 5 | SEC ↗ ×12 |
| 3 | JPMorgan Chase ✦ | 1.88M | +36.8% | $139.87M | 0.0% | ▲ Add | 4 | SEC ↗ ×5 |
| 4 | T. Rowe Price ✦ | 1.88M | +21.0% | $137.17M | 0.0% | ▲ Add | 9 | SEC ↗ ×2 |
| 5 | Wellington Management ✦ | 1.74M | +0.3% | $127.36M | 0.0% | ▲ Add | 9 | SEC ↗ ×7 |
| 6 | State Street Global Advisors ✦ (passive) | 1.65M | -2.9% | $120.60M | 0.0% | ▼ Trim | 7 | SEC ↗ |
| 7 | Vanguard Capital Management Llc | 1.37M | -0.5% | $100.13M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 8 | Geode Capital Management ✦ (passive) | 789.72K | +6.1% | $57.77M | 0.0% | ▲ Add | 9 | SEC ↗ ×2 |
| 9 | Assenagon Asset Management S.A. | 768.32K | +40.6% | $56.19M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 10 | Dimensional Fund Advisors Lp | 569.02K | +44.3% | $41.62M | 0.0% | ▲ Add | 3 | SEC ↗ ×5 |
| 11 | Jennison Associates Llc | 439.52K | -28.0% | $32.15M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 12 | Aberdeen Group plc | 438.17K | +16.7% | $32.05M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 13 | Pictet Asset Management Holding SA | 385.38K | -0.4% | $28.19M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 14 | Loomis Sayles & Co L P | 381.86K | +20.4% | $27.93M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 15 | Northern Trust Corp | 264.99K | +7.2% | $19.38M | 0.0% | ▲ Add | 3 | SEC ↗ ×5 |
| 16 | Charles Schwab Investment… | 257.38K | +2.5% | $18.82M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 17 | Citadel Advisors ✦ | 209.31K | +113.7% | $15.31M | 0.0% | ▲ Add | 4 | SEC ↗ ×2 |
| 18 | Bank of New York Mellon Corp | 204.73K | -0.1% | $14.97M | 0.0% | ▼ Trim | 3 | SEC ↗ ×11 |
| 19 | Bnp Paribas Financial Markets | 184.69K | +44.6% | $13.51M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 20 | Two Sigma Investments ✦ | 136.75K | New | $10.00M | 0.0% | New | 1 | SEC ↗ |
| 21 | Bank Of America Corp /De/ | 135.11K | -19.0% | $9.88M | 0.0% | ▼ Trim | 3 | SEC ↗ ×4 |
| 22 | Alyeska Investment Group, L.P. | 125.00K | 0.0% | $9.14M | 0.0% | Held | 3 | SEC ↗ |
| 23 | Ensign Peak Advisors, Inc | 122.11K | -36.2% | $8.93M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 24 | UBS AM, a distinct business unit of… | 114.11K | +2.9% | $8.35M | 0.0% | ▲ Add | 3 | SEC ↗ ×6 |
| 25 | UBS Group AG | 110.97K | +12.5% | $8.12M | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 26 | Millennium Management ✦ | 106.25K | +27.6% | $7.77M | 0.0% | ▲ Add | 7 | SEC ↗ |
| 27 | Goldman Sachs Group ✦ | 97.38K | -84.8% | $7.12M | 0.0% | ▼ Trim | 4 | SEC ↗ ×2 |
| 28 | Morgan Stanley ✦ | 91.59K | -2.8% | $6.70M | 0.0% | ▼ Trim | 4 | SEC ↗ ×6 |
| 29 | Hrt Financial Lp | 90.82K | New | $6.64M | 0.0% | New | 1 | SEC ↗ |
| 30 | Raymond James Financial Inc | 77.98K | +74.5% | $5.70M | 0.0% | ▲ Add | 3 | SEC ↗ ×4 |
| 31 | Squarepoint Ops LLC | 75.87K | +139.3% | $5.55M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 32 | Nuveen, LLC | 60.36K | +17.5% | $4.41M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 33 | Schroder Investment Management Group | 50.00K | -1.9% | $3.73M | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 34 | Swiss National Bank | 49.80K | +3.8% | $3.64M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 35 | Ameriprise Financial Inc | 45.87K | +0.1% | $3.36M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 36 | Invesco Ltd. | 42.06K | +37.3% | $3.08M | 0.0% | ▲ Add | 3 | SEC ↗ ×5 |
| 37 | Citigroup Inc | 38.32K | +394.9% | $2.80M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 38 | BNP Paribas Asset Management… | 38.26K | -4.1% | $2.80M | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 39 | Universal- Beteiligungs- und… | 36.63K | -3.6% | $2.68M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 40 | Rhumbline Advisers | 35.84K | +8.4% | $2.62M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 41 | Lazard Asset Management Llc | 35.03K | -11.1% | $2.56M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 42 | Marshall Wace ✦ | 34.39K | New | $2.52M | 0.0% | New | 1 | SEC ↗ |
| 43 | Bank Of Montreal /Can/ | 32.31K | +12.3% | $2.36M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 44 | Deutsche Bank Ag\ | 30.64K | +25.6% | $2.24M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 45 | Alliancebernstein L.P. | 34.67K | +41.3% | $2.22M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 46 | Victory Capital Management Inc | 29.12K | -0.3% | $2.13M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 47 | Wells Fargo & Company/Mn | 28.92K | +96.9% | $2.12M | 0.0% | ▲ Add | 3 | SEC ↗ ×4 |
| 48 | Tudor Investment Corp Et Al | 28.66K | -7.5% | $2.10M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 49 | Manufacturers Life Insurance… | 27.77K | -14.5% | $2.03M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 50 | Pnc Financial Services Group, Inc. | 22.33K | -11.7% | $1.63M | 0.0% | ▼ Trim | 3 | SEC ↗ ×3 |
| 51 | Td Asset Management Inc | 21.60K | -29.1% | $1.58M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 52 | Barclays Plc | 18.71K | -43.8% | $1.37M | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 53 | Legal & General Group Plc | 18.46K | -4.7% | $1.35M | 0.0% | ▼ Trim | 3 | SEC ↗ ×3 |
| 54 | MIRAE ASSET GLOBAL ETFS HOLDINGS… | 16.11K | -3.5% | $1.18M | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 55 | Jane Street Group, Llc | 16.01K | New | $1.17M | 0.0% | New | 1 | SEC ↗ ×2 |
| 56 | State Of Wisconsin Investment Board | 15.43K | +8.0% | $1.13M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 57 | Man Group plc | 14.93K | +49.2% | $1.09M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 58 | State Board Of Administration Of… | 12.97K | +49.0% | $948,699 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 59 | Qube Research & Technologies Ltd | 12.76K | New | $933,120 | 0.0% | New | 1 | SEC ↗ |
| 60 | Sei Investments Co | 12.65K | -18.5% | $925,008 | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 61 | New York State Common Retirement… | 10.08K | +17.5% | $736,959 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 62 | AQR Capital Management ✦ | 9.87K | -30.3% | $721,745 | 0.0% | ▼ Trim | 5 | SEC ↗ ×9 |
| 63 | Russell Investments Group, Ltd. | 8.08K | +206.9% | $591,190 | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 64 | Quantinno Capital Management LP | 7.30K | New | $533,703 | 0.0% | New | 1 | SEC ↗ |
| 65 | Creative Planning | 6.25K | +65.9% | $457,418 | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 66 | D. E. Shaw & Co. ✦ | 6.03K | New | $440,815 | 0.0% | New | 1 | SEC ↗ |
| 67 | Zurcher Kantonalbank (Zurich… | 5.64K | 0.0% | $412,510 | 0.0% | Held | 3 | SEC ↗ |
| 68 | Voya Investment Management Llc | 5.43K | +22.9% | $397,150 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 69 | ProShare Advisors LLC | 4.96K | -12.8% | $362,701 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 70 | Jones Financial Companies Lllp | 4.62K | +183.7% | $345,184 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 71 | Prudential Financial Inc | 4.63K | +8.6% | $338,638 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 72 | Capstone Investment Advisors, Llc | 3.35K | -46.5% | $245,385 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 73 | Susquehanna International Group, Llp | 2.91K | -81.1% | $213,130 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 74 | Mirae Asset Global Investments Co.… | 1.71K | -14.2% | $124,923 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 75 | Us Bancorp \De\ | 1.23K | +3.7% | $89,889 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 76 | Royal Bank Of Canada | 989 | +4020.8% | $73,000 | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 77 | Pacer Advisors, Inc. | 444 | New | $32,000 | 0.0% | New | 1 | SEC ↗ |
| 78 | Osaic Holdings, Inc. | 268 | -2.5% | $19,602 | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 79 | Toronto Dominion Bank | 198 | New | $14,482 | 0.0% | New | 1 | SEC ↗ |
| 80 | Optiver Holding B.V. | 65 | -20.7% | $4,754 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 81 | Fifth Third Bancorp | 25 | -13.8% | $1,844 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 82 | Assetmark, Inc | 12 | 0.0% | $878 | 0.0% | Held | 3 | SEC ↗ |
| 83 | Nomura Asset Management Co Ltd | 0 | — | $0 | 0.0% | Held | 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% |
| Marshall Wace | $2.52M | 0.0% |
| Jane Street Group, Llc | $1.17M | 0.0% |
| Qube Research & Technologies… | $933,120 | 0.0% |
| Quantinno Capital Management… | $533,703 | 0.0% |
| D. E. Shaw & Co. | $440,815 | 0.0% |
| Pacer Advisors, Inc. | $32,000 | 0.0% |
| Toronto Dominion Bank | $14,482 | 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)
Sep 11
Bitterman Kevin
Director · 27.14K sh · $1.90M
Sep 04
Bitterman Kevin
Director · 759 sh · $60,690
Sep 04
Bitterman Kevin
Director · 18 sh · $1,439
Sep 04
Bitterman Kevin
Director · 912 sh · $72,924
Sep 03
Bitterman Kevin
Director · 2.34K sh · $187,073
Sep 03
Bitterman Kevin
Director · 54 sh · $4,319
Sep 03
Bitterman Kevin
Director · 2.81K sh · $224,744
Sep 02
Bitterman Kevin
Director · 511 sh · $40,967
Sep 02
Bitterman Kevin
Director · 26.54K sh · $2.13M
Sep 02
Bitterman Kevin
Director · 22.09K sh · $1.77M
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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