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Companies / Health Care / MBX Biosciences, Inc.
MBX

MBX Biosciences, Inc.

Health CarePharmaceutical Preparations
Ticker MBXCARMEL, INFiscal year ends DecemberBook value per share $8.69Diluted shares 47.1M

Metsera, Inc. (Nasdaq: MBX) is a clinical-stage biopharmaceutical company discovering and developing precision peptide therapies for endocrine and metabolic disorders. Its proprietary Precision Endocrine Peptide platform combines peptide design, programmable prodrug technologies and fatty acylation to develop… From the company’s description.

In fiscal 2025, MBX Biosciences, Inc. reported a net loss of $86.97M. Operations used $79.95M in cash.

Fiscal year 2025 · ends 12-31Changes are against fiscal 2024The amber dot is the latest twelve months, to 2026-06-30
Sales & profitability
—
0.00%FY2025
$-86.97MFY2025
−40.5% year over year
Last 12 mo $-104.29M
-23.56%FY2025
+0.5 percentage points
Last 12 mo -25.47%
Cash & financing
$-79.95MFY2025
−46.2% year over year
Last 12 mo $-82.67M
$-81.88MFY2025
−47.4% year over year
Last 12 mo $-85.20M
—
36.5MFY2025
+243.0% year over year
Last 12 mo 47.1M

Margins and return on equity change in ; everything else in percent. Fewer shares and less debt are shown plainly, not as bad news — it depends what you make of buybacks. Dotted labels explain each measure. is shown separately from the annual figures.

What MBX Biosciences, Inc. does

In the company’s own words

Metsera, Inc. (Nasdaq: MBX) is a clinical-stage biopharmaceutical company discovering and developing precision peptide therapies for endocrine and metabolic disorders. Its proprietary Precision Endocrine Peptide platform combines peptide design, programmable prodrug technologies and fatty acylation to develop candidates with extended action and less frequent dosing. The pipeline includes canvuparatide, a potential once-weekly parathyroid hormone replacement therapy for chronic hypoparathyroidism; MBX 4291, a GLP-1/GIP co-agonist prodrug being evaluated for obesity; and imapextide, a GLP-1 receptor antagonist in development for post-bariatric hypoglycemia. The company also has multiple discovery programs in lead optimization. Its candidates are in clinical development, and the company has not generated revenue from product sales. The company was founded around peptide research and chemical technologies originating at Indiana University. Its website is https://www.metsera.com/.

Company details
Sector
Health Care
Industry (SIC)
Pharmaceutical Preparations
Headquarters
CARMEL, IN
Fiscal year end
December
CIK
1776111
SIC
2834

Financial performance, year by year

Fiscal 2024–2025 · USD
$-108.53M$-95.82M$-83.11M$-70.40M$-57.68M20242025Last 12 moLast 12 months

The full income statement, balance sheet and cash flow for each of these years — every figure traceable to its filing — is on the Financials tab with a free account.

Ownership

Who owns MBX Biosciences, Inc. — and what changed

Funds as of 2026Q2 · superinvestors as of 2026-06-30

186
funds hold it
0 of 35
superinvestors hold it
$517.46M
held by funds, at market
23.7%
of shares held by funds

Largest fund holders · MBX Biosciences, Inc.’s weight in each

VANGUARD TOTAL STOCK MARKET INDEX FUND
VTI · VANGUARD INDEX FUNDS
0.00%of fund net assets
Eventide Healthcare & Life Sciences Fund
ETAHX · MUTUAL FUND SERIES TRUST
2.70%of fund net assets
iShares Russell 2000 ETF
IWM · iShares Trust
0.05%of fund net assets
T. Rowe Price Health Sciences Fund, Inc.
PRHSX · T. ROWE PRICE HEALTH SCIENCES FUND, INC.
0.27%of fund net assets
Select Health Care Portfolio
FSPHX · Fidelity Select Portfolios
—of fund net assets

Fund ownership is a floor, not a census — pensions, insurers and people holding shares directly are not visible here.

Fund ownership counts N-PORT filers only, so it is a floor rather than a census — pensions, insurers and direct holders are not visible here, and the remainder is not “held by individuals”.

Could not be determined for this company: bond issues.

Every fund and institutional holder, quarter by quarter, is on the Ownership tab with a free account.

Connected research

Put this business in context.

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