Position in PTCT
as of Mar 31, 2026
· filed May 14, 2026
Position Value
$33,629,171
-$9,537,885 QoQ
Shares Held
493,603
-53.5% QoQ
Ownership
0.595%
of shares outstanding
% of Portfolio
0.05%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2020
15 quarters on record
Voting authority
Sole 91.84790205894211.ToString("F0")%
Shared 0.ToString("F0")%
None 8.152097941057896.ToString("F0")%
Common Shares in PTCT 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. PTCT ranks #11 (0.8% 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.
|
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 PTCT
Export CSV
15 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $33,629,171 | 493,603 | Shares | Defined | 2026-05-14 | |
| 2023-06-30 | $43,167,056 | 1,061,398 | Shares | Defined | 2023-08-11 | |
| 2023-03-31 | $59,633,611 | 1,231,082 | Shares | Defined | 2023-05-15 | |
| 2022-12-31 | $46,806,534 | 1,226,265 | Shares | Defined | 2023-02-10 | |
| 2022-09-30 | $81,268,478 | 1,618,894 | Shares | Defined | 2022-11-14 | |
| 2022-06-30 | $65,571,609 | 1,636,835 | Shares | Defined | 2022-08-05 | |
| 2022-03-31 | $61,441,510 | 1,646,784 | Shares | Defined | 2022-05-13 | |
| 2021-12-31 | $61,187,761 | 1,536,223 | Shares | Defined | 2022-02-14 | |
| 2021-09-30 | $47,935,967 | 1,288,255 | Shares | Defined | 2021-11-12 | |
| 2021-06-30 | $38,250,840 | 904,917 | Shares | Defined | 2021-08-13 | |
| 2021-03-31 | $42,755,439 | 902,966 | Shares | Defined | 2021-05-17 | |
| 2020-12-31 | $52,819,023 | 865,460 | Shares | Defined | 2021-02-12 | |
| 2020-09-30 | $37,297,944 | 797,817 | Shares | Defined | 2020-11-12 | |
| 2020-06-30 | $33,819,732 | 666,530 | Shares | Defined | 2020-08-14 | |
| 2020-03-31 | $19,590,526 | 439,151 | Shares | Defined | 2020-05-15 | |
| No filing history on record for this holder in this stock. | ||||||