SUSQUEHANNA INTERNATIONAL GROUP, LLP
Position in MBX — MBX Biosciences, Inc.
CIK 1446194
BALA CYNWYD, PA
Position in MBX
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$1,472,956
+$1,189,770 QoQ
Shares Held
26,684
+181.3% QoQ
Ownership
0.055%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#73
of 172 holders
Holding Since
Mar 2025
6 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in MBX Over Time
Shares Held
Position Value (USD)
Derivatives in MBX
reported options exposure · as of Jun 30, 2026CallValue
$5,210,880
CallShares
94,400
PutValue
$1,711,200
PutShares
31,000
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 $1,653,301,875 across 349 Biotechnology names. MBX ranks #104 (0.1% 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 MBX
Export CSV
14 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $1,711,200 | 31,000 | Put | Other | 2026-08-14 | |
| 2026-06-30 | $1,472,956 | 26,684 | Shares | Other | 2026-08-14 | |
| 2026-06-30 | $5,210,880 | 94,400 | Call | Other | 2026-08-14 | |
| 2026-03-31 | $283,186 | 9,487 | Shares | Other | 2026-05-15 | |
| 2026-03-31 | $2,773,065 | 92,900 | Call | Other | 2026-05-15 | |
| 2025-12-31 | $7,191,120 | 228,000 | Put | Other | 2026-02-17 | |
| 2025-12-31 | $2,413,693 | 76,528 | Shares | Other | 2026-02-17 | |
| 2025-12-31 | $1,573,846 | 49,900 | Call | Other | 2026-02-17 | |
| 2025-09-30 | $3,556,000 | 203,200 | Call | Other | 2025-11-14 | |
| 2025-09-30 | $8,519,000 | 486,800 | Put | Other | 2025-11-14 | |
| 2025-06-30 | $257,866 | 22,600 | Call | Other | 2025-08-14 | |
| 2025-06-30 | $315,281 | 27,632 | Shares | Other | 2025-08-14 | |
| 2025-06-30 | $645,806 | 56,600 | Put | Other | 2025-08-14 | |
| 2025-03-31 | $100,810 | 13,660 | Shares | Other | 2025-05-14 | |
| No filing history on record for this holder in this stock. | ||||||