Position in RARE
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$44,319,536
-$9,181,339 QoQ
Shares Held
2,115,491
-9.1% QoQ
Ownership
2.15%
of shares outstanding
% of Portfolio
0.03%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2020
25 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 Mar 31, 2026CallValue
$2,683,695
CallShares
128,100
PutValue
$2,677,410
PutShares
127,800
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, 2026CITADEL ADVISORS LLC holds $5,783,571,443 across 373 Biotechnology names. RARE ranks #31 (0.8% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | INSM |
INSMED Inc
|
2,182,571 | $356,894,009 | |
| 2 | ONC |
BeOne Medicines Ltd.
|
1,032,298 | $306,561,536 | |
| 3 | BMRN |
Biomarin Pharmaceutical Inc
|
4,512,634 | $254,918,694 | |
| 4 | JAZZ |
Jazz Pharmaceuticals plc
|
1,259,444 | $238,097,887 | |
| 5 | MDGL |
Madrigal Pharmaceuticals, Inc.
|
453,843 | $237,573,195 | |
| 6 | BBIO |
BridgeBio Pharma, Inc.
|
3,173,940 | $235,696,783 | |
| 7 | TERN |
Terns Pharmaceuticals, Inc.
|
3,218,810 | $169,695,662 | |
| 8 | PTGX |
Protagonist Therapeutics, Inc
|
1,551,900 | $163,570,260 |
All Filings in RARE
Export CSV
50 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $2,677,410 | 127,800 | Put | Defined | 2026-05-15 | |
| 2026-03-31 | $2,683,695 | 128,100 | Call | Defined | 2026-05-15 | |
| 2026-03-31 | $44,319,536 | 2,115,491 | Shares | Defined | 2026-05-15 | |
| 2025-12-31 | $6,854,000 | 298,000 | Put | Defined | 2026-02-17 | |
| 2025-12-31 | $864,800 | 37,600 | Call | Defined | 2026-02-17 | |
| 2025-12-31 | $53,500,875 | 2,326,125 | Shares | Defined | 2026-02-17 | |
| 2025-09-30 | $5,107,584 | 169,800 | Call | Defined | 2025-11-14 | |
| 2025-09-30 | $9,955,065 | 330,953 | Shares | Defined | 2025-11-14 | |
| 2025-09-30 | $2,731,264 | 90,800 | Put | Defined | 2025-11-14 | |
| 2025-06-30 | $1,368,117 | 37,627 | Shares | Defined | 2025-08-14 | |
| 2025-06-30 | $2,468,844 | 67,900 | Put | Defined | 2025-08-14 | |
| 2025-06-30 | $552,672 | 15,200 | Call | Defined | 2025-08-14 | |
| 2025-03-31 | $2,556,426 | 70,600 | Put | Defined | 2025-05-15 | |
| 2025-03-31 | $644,538 | 17,800 | Call | Defined | 2025-05-15 | |
| 2025-03-31 | $9,289,639 | 256,549 | Shares | Defined | 2025-05-15 | |
| 2024-12-31 | $2,515,786 | 59,800 | Put | Defined | 2025-02-14 | |
| 2024-12-31 | $1,220,030 | 29,000 | Call | Defined | 2025-02-14 | |
| 2024-12-31 | $12,039,549 | 286,179 | Shares | Defined | 2025-02-14 | |
| 2024-09-30 | $1,933,140 | 34,800 | Call | Defined | 2024-11-14 | |
| 2024-09-30 | $1,249,875 | 22,500 | Put | Defined | 2024-11-14 | |
| 2024-09-30 | $2,663,789 | 47,953 | Shares | Defined | 2024-11-14 | |
| 2024-06-30 | $961,740 | 23,400 | Call | Defined | 2024-08-14 | |
| 2024-06-30 | $1,306,980 | 31,800 | Put | Defined | 2024-08-14 | |
| 2024-06-30 | $7,149,261 | 173,948 | Shares | Defined | 2024-08-14 | |
| 2024-03-31 | $13,694,409 | 293,305 | Shares | Defined | 2024-05-15 | |
| 2024-03-31 | $1,806,903 | 38,700 | Put | Defined | 2024-05-15 | |
| 2024-03-31 | $1,438,052 | 30,800 | Call | Defined | 2024-05-15 | |
| 2023-12-31 | $1,200,282 | 25,100 | Call | Defined | 2024-02-14 | |
| 2023-12-31 | $9,566,582 | 200,054 | Shares | Defined | 2024-02-14 | |
| 2023-12-31 | $1,286,358 | 26,900 | Put | Defined | 2024-02-14 | |
| 2023-09-30 | $670,220 | 18,800 | Put | Defined | 2023-11-14 | |
| 2023-09-30 | $49,945 | 1,401 | Shares | Defined | 2023-11-14 | |
| 2023-09-30 | $937,595 | 26,300 | Call | Defined | 2023-11-14 | |
| 2023-06-30 | $216,811 | 4,700 | Call | Defined | 2023-08-14 | |
| 2023-06-30 | $396,718 | 8,600 | Put | Defined | 2023-08-14 | |
| 2023-06-30 | $12,763,386 | 276,683 | Shares | Defined | 2023-08-14 | |
| 2023-03-31 | $22,368,421 | 557,816 | Shares | Defined | 2023-05-15 | |
| 2023-03-31 | $376,940 | 9,400 | Put | Defined | 2023-05-15 | |
| 2023-03-31 | $144,360 | 3,600 | Call | Defined | 2023-05-15 | |
| 2022-12-31 | $2,636,177 | 56,900 | Call | Defined | 2023-02-14 | |
| 2022-12-31 | $796,876 | 17,200 | Put | Defined | 2023-02-14 | |
| 2022-12-31 | $10,191,487 | 219,976 | Shares | Defined | 2023-02-14 | |
| 2022-09-30 | $1,614,990 | 39,000 | Put | Defined | 2022-11-14 | |
| 2022-09-30 | $3,863,553 | 93,300 | Call | Defined | 2022-11-14 | |
| 2022-09-30 | $7,578,278 | 183,006 | Shares | Defined | 2022-11-14 | |
| 2022-06-30 | $1,211,098 | 20,300 | Put | Defined | 2022-08-15 | |
| 2022-06-30 | $1,181,268 | 19,800 | Call | Defined | 2022-08-15 | |
| 2022-06-30 | $60,692,296 | 1,017,303 | Shares | Defined | 2022-08-15 | |
| 2022-03-31 | $646,318 | 8,900 | Put | Defined | 2022-05-16 | |
| 2022-03-31 | $95,497,623 | 1,315,032 | Shares | Defined | 2022-05-16 | |
| No filing history on record for this holder in this stock. | ||||||