SUSQUEHANNA INTERNATIONAL GROUP, LLP
Position in MCRB — Seres Therapeutics, Inc.
CIK 1446194
BALA CYNWYD, PA
Position in MCRB
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$460,207
-$474,149 QoQ
Shares Held
58,328
-44.6% QoQ
Ownership
0.587%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#7
of 36 holders
Holding Since
Mar 2020
26 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in MCRB Over Time
Shares Held
Position Value (USD)
Derivatives in MCRB
reported options exposure · as of Jun 30, 2026CallValue
$87,579
CallShares
11,100
PutValue
$503,382
PutShares
63,800
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 Jun 30, 2026SUSQUEHANNA INTERNATIONAL GROUP, LLP holds $1,649,997,309 across 349 Biotechnology names. MCRB ranks #165 (0.0% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | ABVX |
Abivax S.A.
|
1,053,896 | $140,442,180 | |
| 2 | CYTK |
Cytokinetics Inc
|
1,549,458 | $131,998,327 | |
| 3 | REGN |
Regeneron Pharmaceuticals, Inc.
|
180,219 | $112,373,755 | |
| 4 | ALNY |
Alnylam Pharmaceuticals, Inc.
|
294,460 | $88,641,293 | |
| 5 | MDGL |
Madrigal Pharmaceuticals, Inc.
|
148,610 | $79,796,139 | |
| 6 | INSM |
INSMED Inc
|
729,354 | $77,763,723 | |
| 7 | VRTX |
Vertex Pharmaceuticals Inc / Ma
|
144,174 | $71,615,550 | |
| 8 | AGIO |
Agios Pharmaceuticals, Inc.
|
1,375,558 | $51,046,957 |
All Filings in MCRB
Export CSV
50 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $460,207 | 58,328 | Shares | Other | 2026-08-14 | |
| 2026-06-30 | $503,382 | 63,800 | Put | Other | 2026-08-14 | |
| 2026-06-30 | $87,579 | 11,100 | Call | Other | 2026-08-14 | |
| 2026-03-31 | $934,356 | 105,339 | Shares | Other | 2026-05-15 | |
| 2026-03-31 | $502,929 | 56,700 | Call | Other | 2026-05-15 | |
| 2026-03-31 | $575,663 | 64,900 | Put | Other | 2026-05-15 | |
| 2025-12-31 | $2,677,343 | 179,929 | Shares | Other | 2026-02-17 | |
| 2025-12-31 | $1,252,896 | 84,200 | Put | Other | 2026-02-17 | |
| 2025-12-31 | $1,022,256 | 68,700 | Call | Other | 2026-02-17 | |
| 2025-09-30 | $1,473,784 | 76,600 | Put | Other | 2025-11-14 | |
| 2025-09-30 | $6,085,612 | 316,300 | Call | Other | 2025-11-14 | |
| 2025-06-30 | $192,203 | 17,300 | Put | Other | 2025-08-14 | |
| 2025-06-30 | $129,809 | 11,684 | Shares | Other | 2025-08-14 | |
| 2025-06-30 | $924,352 | 83,200 | Call | Other | 2025-08-14 | |
| 2025-03-31 | $17,430 | 24,900 | Put | Other | 2025-05-14 | |
| 2025-03-31 | $502,002 | 717,146 | Shares | Other | 2025-05-14 | |
| 2025-03-31 | $55,160 | 78,800 | Call | Other | 2025-05-14 | |
| 2024-12-31 | $108,196 | 130,200 | Put | Other | 2025-02-14 | |
| 2024-12-31 | $272,408 | 327,808 | Shares | Other | 2025-02-14 | |
| 2024-12-31 | $2,221,927 | 2,673,800 | Call | Other | 2025-02-14 | |
| 2024-09-30 | $73,031 | 77,200 | Call | Defined | 2024-11-14 | |
| 2024-09-30 | $1,128,340 | 1,192,749 | Shares | Defined | 2024-11-14 | |
| 2024-09-30 | $295,625 | 312,500 | Put | Defined | 2024-11-14 | |
| 2024-06-30 | $242,395 | 334,800 | Put | Defined | 2024-08-15 | |
| 2024-06-30 | $1,033,654 | 1,427,700 | Shares | Defined | 2024-08-15 | |
| 2024-03-31 | $217,494 | 281,000 | Put | Defined | 2024-05-07 | |
| 2024-03-31 | $491,182 | 634,603 | Shares | Defined | 2024-05-07 | |
| 2023-12-31 | $37,100 | 26,500 | Call | Defined | 2024-02-14 | |
| 2023-12-31 | $59,500 | 42,500 | Put | Defined | 2024-02-14 | |
| 2023-12-31 | $1,975,470 | 1,411,050 | Shares | Defined | 2024-02-14 | |
| 2023-09-30 | $506,702 | 212,900 | Call | Defined | 2023-11-14 | |
| 2023-09-30 | $594,554 | 249,813 | Shares | Defined | 2023-11-14 | |
| 2023-09-30 | $71,162 | 29,900 | Put | Defined | 2023-11-14 | |
| 2023-06-30 | $1,205,164 | 251,600 | Call | Defined | 2023-08-11 | |
| 2023-06-30 | $1,073,918 | 224,200 | Put | Defined | 2023-08-11 | |
| 2023-06-30 | $1,218,283 | 254,339 | Shares | Defined | 2023-08-11 | |
| 2023-03-31 | $1,669,508 | 294,446 | Shares | Defined | 2023-05-16 | |
| 2023-03-31 | $254,016 | 44,800 | Call | Defined | 2023-05-16 | |
| 2023-03-31 | $251,181 | 44,300 | Put | Defined | 2023-05-16 | |
| 2022-12-31 | $190,400 | 34,000 | Put | Defined | 2023-02-14 | |
| 2022-12-31 | $745,214 | 133,074 | Shares | Defined | 2023-02-14 | |
| 2022-12-31 | $138,320 | 24,700 | Call | Defined | 2023-02-14 | |
| 2022-09-30 | $581,652 | 90,600 | Call | Defined | 2022-11-14 | |
| 2022-09-30 | $1,016,638 | 158,355 | Shares | Defined | 2022-11-14 | |
| 2022-09-30 | $740,868 | 115,400 | Put | Defined | 2022-11-14 | |
| 2022-06-30 | $509,108 | 148,428 | Shares | Defined | 2022-08-15 | |
| 2022-06-30 | $396,165 | 115,500 | Put | Defined | 2022-08-15 | |
| 2022-06-30 | $151,606 | 44,200 | Call | Defined | 2022-08-15 | |
| 2022-03-31 | $1,379,934 | 193,811 | Shares | Defined | 2022-05-16 | |
| 2022-03-31 | $365,256 | 51,300 | Put | Defined | 2022-05-16 | |
| No filing history on record for this holder in this stock. | ||||||