Frazier Life Sciences Management, L.P.
Position in IRON — Disc Medicine, Inc.
CIK 1892134
PALO ALTO, CA
Position in IRON
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$99,093,875
+$12,464,639 QoQ
Shares Held
1,354,852
0.0% QoQ
Ownership
3.53%
of shares outstanding
% of Portfolio
2.16%
of 13F equity value
Holder Rank
#11
of 216 holders
Holding Since
Jun 2023
13 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in IRON Over Time
Shares Held
Position Value (USD)
Position in Biotechnology
Healthcare · as of Jun 30, 2026Frazier Life Sciences Management, L.P. holds $4,497,017,185 across 37 Biotechnology names. IRON ranks #12 (2.2% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | MIRM |
Mirum Pharmaceuticals, Inc.
|
7,679,684 | $899,060,605 | |
| 2 | NAMS |
NewAmsterdam Pharma Co N.V.
|
18,589,235 | $623,725,004 | |
| 3 | ERAS |
Erasca, Inc.
|
24,975,188 | $457,545,444 | |
| 4 | MBX |
MBX Biosciences, Inc.
|
6,652,013 | $367,191,117 | |
| 5 | ARQT |
Arcutis Biotherapeutics, Inc.
|
9,874,511 | $258,909,678 | |
| 6 | TRVI |
Trevi Therapeutics, Inc.
|
9,939,447 | $185,370,686 | |
| 7 | KRYS |
Krystal Biotech, Inc.
|
481,307 | $178,887,372 | |
| 8 | MAZE |
Maze Therapeutics, Inc.
|
5,032,915 | $150,182,183 |
All Filings in IRON
Export CSV
13 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $99,093,875 | 1,354,852 | Shares | Sole | 2026-08-14 | |
| 2026-03-31 | $86,629,236 | 1,354,852 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $100,056,600 | 1,260,000 | Shares | Sole | 2026-02-13 | |
| 2025-09-30 | $95,058,326 | 1,438,534 | Shares | Sole | 2025-11-14 | |
| 2025-06-30 | $87,640,008 | 1,654,834 | Shares | Sole | 2025-08-14 | |
| 2025-03-31 | $87,109,959 | 1,754,834 | Shares | Sole | 2025-05-15 | |
| 2024-12-31 | $111,256,475 | 1,754,834 | Shares | Sole | 2025-02-18 | |
| 2024-09-30 | $86,232,542 | 1,754,834 | Shares | Sole | 2024-11-15 | |
| 2024-06-30 | $79,090,368 | 1,754,834 | Shares | Sole | 2024-08-15 | |
| 2024-03-31 | $48,874,100 | 785,000 | Shares | Sole | 2024-05-15 | |
| 2023-12-31 | $45,341,600 | 785,000 | Shares | Sole | 2024-02-14 | |
| 2023-09-30 | $30,771,900 | 655,000 | Shares | Sole | 2023-11-14 | |
| 2023-06-30 | $29,082,000 | 655,000 | Shares | Sole | 2023-08-14 | |
| No filing history on record for this holder in this stock. | ||||||