Position in IRON
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$127,362,408
+$16,402,471 QoQ
Shares Held
1,741,351
+0.3% QoQ
Ownership
4.54%
of shares outstanding
% of Portfolio
0.02%
of 13F equity value
Holder Rank
#6
of 216 holders
Holding Since
Sep 2020
17 quarters on record
Voting authority
Sole 0%
Shared 69%
None 31%
Common Shares in IRON Over Time
Shares Held
Position Value (USD)
Position in Biotechnology
Healthcare · as of Jun 30, 2026WELLINGTON MANAGEMENT GROUP LLP holds $14,994,233,945 across 206 Biotechnology names. IRON ranks #31 (0.8% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | VRTX |
Vertex Pharmaceuticals Inc / Ma
|
3,247,658 | $1,613,209,155 | |
| 2 | ARGX |
Argenx SE
|
930,548 | $863,334,513 | |
| 3 | REGN |
Regeneron Pharmaceuticals, Inc.
|
1,270,087 | $791,950,042 | |
| 4 | RVMD |
Revolution Medicines, Inc.
|
3,843,415 | $719,794,757 | |
| 5 | ALNY |
Alnylam Pharmaceuticals, Inc.
|
2,110,407 | $635,295,816 | |
| 6 | IONS |
Ionis Pharmaceuticals Inc
|
7,651,415 | $606,680,693 | |
| 7 | CYTK |
Cytokinetics Inc
|
6,931,770 | $590,517,483 | |
| 8 | MDGL |
Madrigal Pharmaceuticals, Inc.
|
825,714 | $443,367,129 |
All Filings in IRON
Export CSV
17 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $127,362,408 | 1,741,351 | Shares | Defined | 2026-08-14 | |
| 2026-03-31 | $110,959,937 | 1,735,376 | Shares | Defined | 2026-05-15 | |
| 2025-12-31 | $120,566,135 | 1,518,274 | Shares | Defined | 2026-02-17 | |
| 2025-09-30 | $93,177,884 | 1,410,077 | Shares | Defined | 2025-11-14 | |
| 2025-06-30 | $75,843,483 | 1,432,090 | Shares | Defined | 2025-08-14 | |
| 2025-03-31 | $116,331,287 | 2,343,499 | Shares | Defined | 2025-05-13 | |
| 2024-12-31 | $88,468,675 | 1,395,405 | Shares | Defined | 2025-02-12 | |
| 2024-09-30 | $90,428,703 | 1,840,226 | Shares | Defined | 2024-11-14 | |
| 2024-06-30 | $79,165,226 | 1,756,495 | Shares | Defined | 2024-08-14 | |
| 2024-03-31 | $41,744,206 | 670,482 | Shares | Defined | 2024-05-15 | |
| 2023-12-31 | $10,265,451 | 177,726 | Shares | Defined | 2024-02-12 | |
| 2023-09-30 | $2,571,919 | 54,745 | Shares | Defined | 2023-11-14 | |
| 2023-06-30 | $1,921,187 | 43,270 | Shares | Defined | 2023-08-14 | |
| 2021-06-30 GMTX | — | 700,000 | Shares | Defined | 2021-08-16 | |
| 2021-03-31 GMTX | — | 1,479,954 | Shares | Defined | 2021-05-17 | |
| 2020-12-31 FSDC | — | 990,000 | Shares | Defined | 2021-02-12 | |
| 2020-09-30 FSDC | — | 990,000 | Shares | Defined | 2020-11-16 | |
| No filing history on record for this holder in this stock. | ||||||