Position in MIRM
as of Mar 31, 2026
· filed May 14, 2026
Position Value
$43,910,430
+$3,232,081 QoQ
Shares Held
475,324
-7.7% QoQ
Ownership
0.779%
of shares outstanding
% of Portfolio
0.06%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Sep 2024
7 quarters on record
Voting authority
Sole 98.17577063224243.ToString("F0")%
Shared 0.ToString("F0")%
None 1.8242293677575718.ToString("F0")%
Common Shares in MIRM Over Time
Shares Held
Position Value (USD)
Position in Biotechnology
Healthcare · as of Mar 31, 2026LOOMIS SAYLES & CO L P holds $4,075,180,510 across 25 Biotechnology names. MIRM ranks #6 (1.1% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | VRTX |
Vertex Pharmaceuticals Inc / Ma
|
4,003,821 | $1,787,866,229 | |
| 2 | REGN |
Regeneron Pharmaceuticals, Inc.
|
1,912,310 | $1,477,527,197 | |
| 3 | ALNY |
Alnylam Pharmaceuticals, Inc.
|
512,097 | $169,437,533 | |
| 4 | LGND |
Ligand Pharmaceuticals Inc
|
353,209 | $70,518,176 | |
| 5 | CRSP |
CRISPR Therapeutics AG
|
968,135 | $46,054,181 | |
| 6 | MIRM |
Mirum Pharmaceuticals, Inc.
This page
|
475,324 | $43,910,430 | |
| 7 | AXSM |
Axsome Therapeutics, Inc.
|
256,625 | $43,374,756 | |
| 8 | RYTM |
Rhythm Pharmaceuticals, Inc.
|
465,102 | $40,449,920 |
All Filings in MIRM
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7 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $43,910,430 | 475,324 | Shares | Defined | 2026-05-14 | |
| 2025-12-31 | $40,678,349 | 514,981 | Shares | Defined | 2026-02-12 | |
| 2025-09-30 | $39,517,021 | 539,040 | Shares | Defined | 2025-11-13 | |
| 2025-06-30 | $28,139,981 | 552,957 | Shares | Defined | 2025-08-13 | |
| 2025-03-31 | $25,505,282 | 566,155 | Shares | Defined | 2025-05-14 | |
| 2024-12-31 | $23,901,291 | 578,024 | Shares | Defined | 2025-02-12 | |
| 2024-09-30 | $19,473,324 | 499,316 | Shares | Defined | 2024-11-13 | |
| No filing history on record for this holder in this stock. | ||||||