Balyasny Asset Management L.P.
Position in RARE — Ultragenyx Pharmaceutical Inc.
CIK 1218710
Chicago, IL
Position in RARE
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$8,052,425
-$3,908,817 QoQ
Shares Held
384,364
-26.1% QoQ
Ownership
0.390%
of shares outstanding
% of Portfolio
0.02%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Dec 2020
13 quarters on record
Voting authority
Sole 100.ToString("F0")%
Shared 0.ToString("F0")%
None 0.ToString("F0")%
Common Shares in RARE Over Time
Shares Held
Position Value (USD)
Derivatives in RARE
reported options exposure · as of Dec 31, 2025CallValue
$4,188,300
CallShares
182,100
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, 2026Balyasny Asset Management L.P. holds $2,162,672,955 across 176 Biotechnology names. RARE ranks #73 (0.4% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | TERN |
Terns Pharmaceuticals, Inc.
|
2,779,445 | $146,532,340 | |
| 2 | ERAS |
Erasca, Inc.
|
5,143,985 | $83,229,677 | |
| 3 | TNGX |
Tango Therapeutics, Inc.
|
3,826,659 | $80,053,706 | |
| 4 | APLS |
Apellis Pharmaceuticals, Inc.
|
1,917,501 | $77,141,065 | |
| 5 | BMRN |
Biomarin Pharmaceutical Inc
|
1,362,752 | $76,981,860 | |
| 6 | CYTK |
Cytokinetics Inc
|
992,545 | $65,418,640 | |
| 7 | DAWN |
Day One Biopharmaceuticals, Inc.
|
2,625,235 | $56,285,038 | |
| 8 | FOLD |
AMICUS THERAPEUTICS, INC.
|
3,827,513 | $55,345,837 |
All Filings in RARE
Export CSV
17 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $8,052,425 | 384,364 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $11,961,242 | 520,054 | Shares | Sole | 2026-02-17 | |
| 2025-12-31 | $4,188,300 | 182,100 | Call | Sole | 2026-02-17 | |
| 2025-09-30 | $9,324,800 | 310,000 | Call | Sole | 2025-11-14 | |
| 2025-06-30 | $2,563,198 | 70,495 | Shares | Sole | 2025-08-14 | |
| 2025-06-30 | $6,726,600 | 185,000 | Call | Sole | 2025-08-14 | |
| 2025-03-31 | $12,673,500 | 350,000 | Call | Sole | 2025-05-15 | |
| 2025-03-31 | $4,083,220 | 112,765 | Shares | Sole | 2025-05-15 | |
| 2024-12-31 | $4,207,000 | 100,000 | Call | Sole | 2025-02-14 | |
| 2024-12-31 | $4,623,493 | 109,900 | Shares | Sole | 2025-02-14 | |
| 2024-03-31 | $1,342,010 | 28,743 | Shares | Sole | 2024-05-13 | |
| 2023-12-31 | $3,965,856 | 82,933 | Shares | Sole | 2024-02-14 | |
| 2022-12-31 | $56,476 | 1,219 | Shares | Other | 2023-02-14 | |
| 2022-09-30 | $414,100 | 10,000 | Call | Sole | 2022-11-15 | |
| 2021-09-30 | $320,445 | 3,553 | Shares | Sole | 2021-12-01 | |
| 2021-03-31 | $525,122 | 4,612 | Shares | Sole | 2021-05-17 | |
| 2020-12-31 | $1,281,584 | 9,258 | Shares | Sole | 2021-02-16 | |
| No filing history on record for this holder in this stock. | ||||||