Skip to main content
Equibles

FMR LLC

Position in MBX — MBX Biosciences, Inc.

CIK 315066 BOSTON, MA
Back to MBX Full portfolio

Position in MBX

as of Jun 30, 2026 · filed Aug 13, 2026
Position Value
$293,823,250
+$206,163,233 QoQ
Shares Held
5,322,885
+81.3% QoQ
Ownership
11.1%
of shares outstanding
% of Portfolio
0.01%
of 13F equity value
Holder Rank
#2
of 172 holders
Holding Since
Dec 2024
7 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in MBX Over Time

Shares Held

Position Value (USD)

Position in Biotechnology

Healthcare · as of Jun 30, 2026

FMR LLC holds $61,908,415,112 across 370 Biotechnology names. MBX ranks #54 (0.5% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 ARGX
Argenx SE
 5,231,452 $4,853,584,218
2 ALNY
Alnylam Pharmaceuticals, Inc.
 15,023,962 $4,522,663,276
3 MRNA
Moderna, Inc.
 51,859,891 $3,631,748,165
4 ROIV
Roivant Sciences Ltd.
 81,020,390 $2,867,311,601
5 RVMD
Revolution Medicines, Inc.
 12,200,422 $2,284,895,029
6 IONS
Ionis Pharmaceuticals Inc
 24,631,956 $1,953,067,789
7 INSM
INSMED Inc
 16,143,583 $1,721,228,815
8 KRYS
Krystal Biotech, Inc.
 4,418,197 $1,642,111,277

All Filings in MBX

Export CSV
7 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $293,823,250 5,322,885
2026-03-31 $87,660,017 2,936,684
2025-12-31 $496,628 15,746
2025-09-30 $1,207,080 68,976
2025-06-30 $699,809 61,333
2025-03-31 $326,491 44,240
2024-12-31 $452,880 24,573