Position in IRON
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$27,929,532
+$7,646,358 QoQ
Shares Held
381,864
+20.4% QoQ
Ownership
0.995%
of shares outstanding
% of Portfolio
0.04%
of 13F equity value
Holder Rank
#30
of 216 holders
Holding Since
Dec 2025
3 quarters on record
Voting authority
Sole 98%
Shared 0%
None 2%
Common Shares in IRON Over Time
Shares Held
Position Value (USD)
Position in Biotechnology
Healthcare · as of Jun 30, 2026LOOMIS SAYLES & CO L P holds $4,031,464,727 across 23 Biotechnology names. IRON ranks #16 (0.7% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | VRTX |
Vertex Pharmaceuticals Inc / Ma
|
3,920,953 | $1,947,654,982 | |
| 2 | REGN |
Regeneron Pharmaceuticals, Inc.
|
1,859,172 | $1,159,268,108 | |
| 3 | ALNY |
Alnylam Pharmaceuticals, Inc.
|
580,187 | $174,653,692 | |
| 4 | LGND |
Ligand Pharmaceuticals Inc
|
291,805 | $92,236,641 | |
| 5 | AXSM |
Axsome Therapeutics, Inc.
|
239,490 | $58,619,966 | |
| 6 | VCEL |
Vericel Corp
|
1,200,239 | $53,398,633 | |
| 7 | MIRM |
Mirum Pharmaceuticals, Inc.
|
443,636 | $51,936,466 | |
| 8 | RYTM |
Rhythm Pharmaceuticals, Inc.
|
434,102 | $48,198,345 |
All Filings in IRON
Export CSV
3 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $27,929,532 | 381,864 | Shares | Defined | 2026-08-14 | |
| 2026-03-31 | $20,283,174 | 317,222 | Shares | Defined | 2026-05-14 | |
| 2025-12-31 | $22,426,098 | 282,409 | Shares | Defined | 2026-02-12 | |
| No filing history on record for this holder in this stock. | ||||||