Position in RARE
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$26,418,326
+$18,488,777 QoQ
Shares Held
1,261,018
+265.8% QoQ
Ownership
1.28%
of shares outstanding
% of Portfolio
0.02%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2020
23 quarters on record
Voting authority
Sole 99.23078021090896.ToString("F0")%
Shared 0.ToString("F0")%
None 0.7692197890910359.ToString("F0")%
Common Shares in RARE Over Time
Shares Held
Position Value (USD)
Derivatives in RARE
reported options exposure · as of Jun 30, 2021CallValue
$2,307,470
CallShares
24,200
PutValue
$0
PutShares
0
Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.
Position in Biotechnology
Healthcare · as of Mar 31, 2026D. E. Shaw & Co., Inc. holds $4,371,472,260 across 180 Biotechnology names. RARE ranks #33 (0.6% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | INSM |
INSMED Inc
|
5,625,825 | $919,934,903 | |
| 2 | ALNY |
Alnylam Pharmaceuticals, Inc.
|
1,059,062 | $350,411,843 | |
| 3 | BBIO |
BridgeBio Pharma, Inc.
|
2,545,486 | $189,027,789 | |
| 4 | PCVX |
Vaxcyte, Inc.
|
2,865,318 | $166,503,628 | |
| 5 | EXEL |
Exelixis, Inc.
|
3,603,063 | $154,535,371 | |
| 6 | HALO |
Halozyme Therapeutics, Inc.
|
1,868,708 | $120,774,597 | |
| 7 | PTCT |
Ptc Therapeutics, Inc.
|
1,640,381 | $111,759,157 | |
| 8 | VRTX |
Vertex Pharmaceuticals Inc / Ma
|
248,960 | $111,170,598 |
All Filings in RARE
Export CSV
26 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $26,418,326 | 1,261,018 | Shares | Defined | 2026-05-15 | |
| 2025-12-31 | $7,929,549 | 344,763 | Shares | Defined | 2026-02-17 | |
| 2025-09-30 | $7,148,211 | 237,640 | Shares | Defined | 2025-11-14 | |
| 2025-06-30 | $19,663,523 | 540,801 | Shares | Defined | 2025-08-14 | |
| 2025-03-31 | $20,147,859 | 556,417 | Shares | Defined | 2025-05-15 | |
| 2024-12-31 | $12,035,343 | 286,079 | Shares | Defined | 2025-02-14 | |
| 2024-09-30 | $14,531,546 | 261,594 | Shares | Defined | 2024-11-14 | |
| 2024-06-30 | $8,361,466 | 203,442 | Shares | Defined | 2024-08-14 | |
| 2023-09-30 | $219,318 | 6,152 | Shares | Defined | 2023-11-14 | |
| 2023-06-30 | $4,379,074 | 94,929 | Shares | Defined | 2023-08-14 | |
| 2023-03-31 | $4,847,608 | 120,888 | Shares | Defined | 2023-05-15 | |
| 2022-12-31 | $13,435,468 | 289,995 | Shares | Defined | 2023-02-14 | |
| 2022-09-30 | $19,560,179 | 472,354 | Shares | Defined | 2022-11-14 | |
| 2022-06-30 | $21,448,784 | 359,517 | Shares | Defined | 2022-08-15 | |
| 2022-03-31 | $35,172,625 | 484,338 | Shares | Defined | 2022-05-16 | |
| 2021-12-31 | $45,962,836 | 546,591 | Shares | Defined | 2022-02-14 | |
| 2021-09-30 | $42,904,013 | 475,707 | Shares | Defined | 2021-11-15 | |
| 2021-06-30 | $2,307,470 | 24,200 | Call | Defined | 2021-08-16 | |
| 2021-06-30 | $73,047,348 | 766,097 | Shares | Defined | 2021-08-16 | |
| 2021-03-31 | $85,527,987 | 751,168 | Shares | Defined | 2021-05-17 | |
| 2021-03-31 | $2,755,412 | 24,200 | Call | Defined | 2021-05-17 | |
| 2020-12-31 | $99,017,178 | 715,287 | Shares | Defined | 2021-02-16 | |
| 2020-12-31 | $3,350,006 | 24,200 | Call | Defined | 2021-02-16 | |
| 2020-09-30 | $35,415,012 | 430,892 | Shares | Defined | 2020-11-16 | |
| 2020-06-30 | $26,372,967 | 337,164 | Shares | Defined | 2020-08-14 | |
| 2020-03-31 | $17,704,198 | 398,474 | Shares | Defined | 2020-05-15 | |
| No filing history on record for this holder in this stock. | ||||||