WELLINGTON MANAGEMENT GROUP LLP
Position in RARE — Ultragenyx Pharmaceutical Inc.
CIK 902219
Boston, MA
Position in RARE
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$55,325,009
-$1,298,921 QoQ
Shares Held
2,640,812
+7.3% QoQ
Ownership
2.68%
of shares outstanding
% of Portfolio
0.01%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2020
25 quarters on record
Voting authority
Sole 0.ToString("F0")%
Shared 85.66141777604767.ToString("F0")%
None 14.33858222395233.ToString("F0")%
Common Shares in RARE Over Time
Shares Held
Position Value (USD)
Position in Biotechnology
Healthcare · as of Mar 31, 2026WELLINGTON MANAGEMENT GROUP LLP holds $14,418,547,095 across 180 Biotechnology names. RARE ranks #46 (0.4% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | VRTX |
Vertex Pharmaceuticals Inc / Ma
|
3,212,589 | $1,434,549,489 | |
| 2 | REGN |
Regeneron Pharmaceuticals, Inc.
|
1,837,459 | $1,419,694,318 | |
| 3 | ARGX |
Argenx SE
|
1,021,457 | $745,918,971 | |
| 4 | ALNY |
Alnylam Pharmaceuticals, Inc.
|
1,935,925 | $640,539,501 | |
| 5 | RVMD |
Revolution Medicines, Inc.
|
6,027,819 | $586,205,394 | |
| 6 | CYTK |
Cytokinetics Inc
|
8,009,489 | $527,905,416 | |
| 7 | IONS |
Ionis Pharmaceuticals Inc
|
6,391,816 | $479,961,458 | |
| 8 | ASND |
Ascendis Pharma A/S
|
1,757,633 | $402,023,391 |
All Filings in RARE
Export CSV
25 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $55,325,009 | 2,640,812 | Shares | Defined | 2026-05-15 | |
| 2025-12-31 | $56,623,930 | 2,461,910 | Shares | Defined | 2026-02-17 | |
| 2025-09-30 | $58,509,478 | 1,945,129 | Shares | Defined | 2025-11-14 | |
| 2025-06-30 | $68,059,373 | 1,871,820 | Shares | Defined | 2025-08-14 | |
| 2025-03-31 | $88,696,320 | 2,449,498 | Shares | Defined | 2025-05-13 | |
| 2024-12-31 | $103,388,831 | 2,457,543 | Shares | Defined | 2025-02-12 | |
| 2024-09-30 | $231,389,301 | 4,165,424 | Shares | Defined | 2024-11-14 | |
| 2024-06-30 | $187,258,462 | 4,556,167 | Shares | Defined | 2024-08-14 | |
| 2024-03-31 | $191,334,449 | 4,097,975 | Shares | Defined | 2024-05-15 | |
| 2023-12-31 | $211,126,685 | 4,415,029 | Shares | Defined | 2024-02-12 | |
| 2023-09-30 | $185,233,119 | 5,195,880 | Shares | Defined | 2023-11-14 | |
| 2023-06-30 | $238,839,042 | 5,177,521 | Shares | Defined | 2023-08-14 | |
| 2023-03-31 | $204,555,993 | 5,101,147 | Shares | Defined | 2023-05-12 | |
| 2022-12-31 | $241,040,346 | 5,202,684 | Shares | Defined | 2023-02-13 | |
| 2022-09-30 | $250,366,431 | 6,046,038 | Shares | Defined | 2022-11-14 | |
| 2022-06-30 | $263,365,488 | 4,414,440 | Shares | Defined | 2022-08-15 | |
| 2022-03-31 | $244,747,189 | 3,370,245 | Shares | Defined | 2022-05-16 | |
| 2021-12-31 | $241,960,815 | 2,877,403 | Shares | Defined | 2022-02-11 | |
| 2021-09-30 | $226,221,320 | 2,508,275 | Shares | Defined | 2021-11-15 | |
| 2021-06-30 | $38,099,094 | 399,571 | Shares | Defined | 2021-08-16 | |
| 2021-03-31 | $72,786,369 | 639,262 | Shares | Defined | 2021-05-17 | |
| 2020-12-31 | $92,358,695 | 667,187 | Shares | Defined | 2021-02-12 | |
| 2020-09-30 | $61,940,354 | 753,624 | Shares | Defined | 2020-11-16 | |
| 2020-06-30 | $47,994,695 | 613,586 | Shares | Defined | 2020-08-14 | |
| 2020-03-31 | $37,168,226 | 836,557 | Shares | Defined | 2020-05-14 | |
| No filing history on record for this holder in this stock. | ||||||