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Equibles

MILLENNIUM MANAGEMENT LLC

Position in MBX — MBX Biosciences, Inc.

CIK 1273087 NEW YORK, NY
Back to MBX Full portfolio

Position in MBX

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$12,483,535
-$4,364,252 QoQ
Shares Held
226,151
-59.9% QoQ
Ownership
0.470%
of shares outstanding
% of Portfolio
0.01%
of 13F equity value
Holder Rank
#40
of 172 holders
Holding Since
Sep 2024
8 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 Sep 30, 2025
CallValue
$437,500
CallShares
25,000
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 Jun 30, 2026

MILLENNIUM MANAGEMENT LLC holds $4,631,421,099 across 322 Biotechnology names. MBX ranks #86 (0.3% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 VRTX
Vertex Pharmaceuticals Inc / Ma
 468,410 $232,673,299
2 INSM
INSMED Inc
 2,048,005 $218,358,293
3 APGE
Apogee Therapeutics, Inc.
 1,491,404 $197,954,052
4 JAZZ
Jazz Pharmaceuticals plc
 763,880 $184,072,163
5 ONC
BeOne Medicines Ltd.
 543,323 $154,830,755
6 AXSM
Axsome Therapeutics, Inc.
 556,088 $136,113,659
7 BMRN
Biomarin Pharmaceutical Inc
 2,071,816 $118,549,311
8 REGN
Regeneron Pharmaceuticals, Inc.
 165,120 $102,958,924

All Filings in MBX

Export CSV
10 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $12,483,535 226,151
2026-03-31 $16,847,787 564,415
2025-12-31 $14,573,025 462,049
2025-09-30 $437,500 25,000
2025-09-30 $11,469,780 655,416
2025-06-30 $585,333 51,300
2025-06-30 $8,749,644 766,840
2025-03-31 $1,257,847 170,440
2024-12-31 $6,149,022 333,642
2024-09-30 $11,441,877 440,411