SUSQUEHANNA INTERNATIONAL GROUP, LLP
Position in RYTM — Rhythm Pharmaceuticals, Inc.
CIK 1446194
BALA CYNWYD, PA
Position in RYTM
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$4,416,684
+$3,978,142 QoQ
Shares Held
50,784
+1139.5% QoQ
Ownership
0.074%
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 100.ToString("F0")%
Shared 0.ToString("F0")%
None 0.ToString("F0")%
Common Shares in RYTM Over Time
Shares Held
Position Value (USD)
Derivatives in RYTM
reported options exposure · as of Mar 31, 2026CallValue
$7,209,813
CallShares
82,900
PutValue
$1,174,095
PutShares
13,500
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, 2026SUSQUEHANNA INTERNATIONAL GROUP, LLP holds $1,159,899,084 across 353 Biotechnology names. RYTM ranks #58 (0.4% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | CYTK |
Cytokinetics Inc
|
898,951 | $59,249,860 | |
| 2 | ALNY |
Alnylam Pharmaceuticals, Inc.
|
174,268 | $57,660,053 | |
| 3 | AGIO |
Agios Pharmaceuticals, Inc.
|
1,344,953 | $45,499,759 | |
| 4 | ABVX |
Abivax S.A.
|
381,282 | $42,455,750 | |
| 5 | BBIO |
BridgeBio Pharma, Inc.
|
398,943 | $29,625,507 | |
| 6 | INSM |
INSMED Inc
|
173,630 | $28,391,977 | |
| 7 | CRSP |
CRISPR Therapeutics AG
|
593,406 | $28,228,323 | |
| 8 | TERN |
Terns Pharmaceuticals, Inc.
|
521,571 | $27,497,223 |
All Filings in RYTM
Export CSV
50 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $7,209,813 | 82,900 | Call | Other | 2026-05-15 | |
| 2026-03-31 | $1,174,095 | 13,500 | Put | Other | 2026-05-15 | |
| 2026-03-31 | $4,416,684 | 50,784 | Shares | Other | 2026-05-15 | |
| 2025-12-31 | $438,542 | 4,097 | Shares | Other | 2026-02-17 | |
| 2025-12-31 | $1,926,720 | 18,000 | Put | Other | 2026-02-17 | |
| 2025-12-31 | $22,778,112 | 212,800 | Call | Other | 2026-02-17 | |
| 2025-09-30 | $26,217,004 | 259,600 | Call | Other | 2025-11-14 | |
| 2025-09-30 | $313,472 | 3,104 | Shares | Other | 2025-11-14 | |
| 2025-09-30 | $11,078,603 | 109,700 | Put | Other | 2025-11-14 | |
| 2025-06-30 | $3,804,038 | 60,200 | Call | Other | 2025-08-14 | |
| 2025-06-30 | $4,882,185 | 77,262 | Shares | Other | 2025-08-14 | |
| 2025-06-30 | $8,435,865 | 133,500 | Put | Other | 2025-08-14 | |
| 2025-03-31 | $4,703,736 | 88,800 | Call | Other | 2025-05-14 | |
| 2025-03-31 | $4,395,450 | 82,980 | Shares | Other | 2025-05-14 | |
| 2025-03-31 | $1,181,231 | 22,300 | Put | Other | 2025-05-14 | |
| 2024-12-31 | $6,454,494 | 115,300 | Call | Other | 2025-02-14 | |
| 2024-12-31 | $2,836,170 | 50,664 | Shares | Other | 2025-02-14 | |
| 2024-12-31 | $895,680 | 16,000 | Put | Other | 2025-02-14 | |
| 2024-09-30 | $1,969,864 | 37,600 | Put | Defined | 2024-11-14 | |
| 2024-09-30 | $12,185,914 | 232,600 | Call | Defined | 2024-11-14 | |
| 2024-09-30 | $1,125,389 | 21,481 | Shares | Defined | 2024-11-14 | |
| 2024-06-30 | $3,839,110 | 93,500 | Call | Defined | 2024-08-15 | |
| 2024-06-30 | $990,572 | 24,125 | Shares | Defined | 2024-08-15 | |
| 2024-06-30 | $1,096,302 | 26,700 | Put | Defined | 2024-08-15 | |
| 2024-03-31 | $4,473,952 | 103,253 | Shares | Defined | 2024-05-07 | |
| 2024-03-31 | $1,884,855 | 43,500 | Put | Defined | 2024-05-07 | |
| 2024-03-31 | $11,382,791 | 262,700 | Call | Defined | 2024-05-07 | |
| 2023-12-31 | $12,457,870 | 271,000 | Call | Defined | 2024-02-14 | |
| 2023-12-31 | $1,481,705 | 32,232 | Shares | Defined | 2024-02-14 | |
| 2023-12-31 | $1,222,802 | 26,600 | Put | Defined | 2024-02-14 | |
| 2023-09-30 | $1,178,345 | 51,400 | Call | Defined | 2023-11-14 | |
| 2023-09-30 | $204,032 | 8,900 | Put | Defined | 2023-11-14 | |
| 2023-09-30 | $698,203 | 30,456 | Shares | Defined | 2023-11-14 | |
| 2023-06-30 | $268,754 | 16,298 | Shares | Defined | 2023-08-11 | |
| 2023-06-30 | $573,852 | 34,800 | Call | Defined | 2023-08-11 | |
| 2023-03-31 | $13,996,461 | 784,555 | Shares | Defined | 2023-05-16 | |
| 2023-03-31 | $1,874,984 | 105,100 | Call | Defined | 2023-05-16 | |
| 2023-03-31 | $865,240 | 48,500 | Put | Defined | 2023-05-16 | |
| 2022-12-31 | $20,210,503 | 694,042 | Shares | Defined | 2023-02-14 | |
| 2022-12-31 | $1,156,064 | 39,700 | Put | Defined | 2023-02-14 | |
| 2022-12-31 | $2,198,560 | 75,500 | Call | Defined | 2023-02-14 | |
| 2022-09-30 | $2,501,450 | 102,100 | Put | Defined | 2022-11-14 | |
| 2022-09-30 | $5,255,789 | 214,522 | Shares | Defined | 2022-11-14 | |
| 2022-09-30 | $6,815,900 | 278,200 | Call | Defined | 2022-11-14 | |
| 2022-06-30 | $455,255 | 109,700 | Call | Defined | 2022-08-15 | |
| 2022-06-30 | $266,683 | 64,261 | Shares | Defined | 2022-08-15 | |
| 2022-03-31 | $1,203,840 | 104,500 | Call | Defined | 2022-05-16 | |
| 2022-03-31 | $203,569 | 17,671 | Shares | Defined | 2022-05-16 | |
| 2022-03-31 | $180,864 | 15,700 | Put | Defined | 2022-05-16 | |
| 2021-12-31 | $643,390 | 64,468 | Shares | Defined | 2022-04-05 | |
| No filing history on record for this holder in this stock. | ||||||