MBX Biosciences, Inc.

MBXNASDAQ

$58.51+1.96 (+3.47%)as of Oct 2, 2026

Legend

Insider buy

Insider sell

Congress buy

Congress sell

Hedge Funds
bought vs soldGreener markers show more buyers; redder markers show more sellers.

Company share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size.

Insider buy
Insider sell
Congress buy
Congress sell
Hedge Funds bought vs sold

Share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size. Greener fund markers mean more buyers.

Insider Buy
Insider Sell
Congress Buy
Congress Sell
Hedge funds bought vs sold
BuybackNo changeNet dilution

MBX Biosciences, Inc. price and activity chart data

Showing the 1Y range: Oct 2, 2025 to Oct 2, 2026. Price (+249.3%). 0 insider or congressional trades plotted in this window as 0 markers; nearby trades of the same kind are grouped.

Transactions plotted on the price chart
Date	Category	Person	Role	Action	Amount	Change in holding

Largest institutional holders

13F · Q2 2026

Fund	% of company held	Value	% of portfolio	Quarterly activity
Frazier Life Sciences Management, L.P.	13.87%	$367M	8.00%	Not reported
FMR LLC	11.10%	$294M	0.01%	Not reported
Wellington Management Group LLP	10.38%	$275M	0.05%	Add 55.95%
NEA Management Company, LLC	7.54%	$200M	12.56%	Not reported
Orbimed Advisors LLC	7.15%	$189M	3.51%	Not reported
BlackRock, Inc.	6.93%	$183M	0.00%	Not reported
Paradigm Biocapital Advisors LP	5.23%	$138M	2.59%	New Not reported
NVP Associates, LLC	4.46%	$118M	35.93%	Not reported
Deep Track Capital, LP	3.61%	$95.6M	1.39%	Reduce 37.17%
Polar Capital Holdings Plc	3.35%	$88.8M	0.21%	Reduce 0.84%
Vanguard Capital Management LLC	3.08%	$81.6M	0.00%	Not reported
Aaron Wealth Advisors LLC	2.44%	$64.5M	3.27%	Reduce 0.03%
Driehaus Capital Management LLC	2.20%	$58.3M	0.34%	Add 3.77%
Kynam Capital Management, LP	1.95%	$51.6M	2.85%	Not reported
Woodline Partners LP	1.88%	$49.7M	0.15%	Not reported
Eventide Asset Management, LLC	1.82%	$48.2M	0.64%	Reduce 1.85%
State Street Corp	1.80%	$47.7M	0.00%	Not reported
Parkman Healthcare Partners LLC	1.67%	$44.2M	4.52%	Add 0.02%
Geode Capital Management, LLC	1.61%	$42.7M	0.00%	Not reported
Braidwell LP	1.48%	$39.2M	1.45%	Reduce 52.37%
TCG Crossover Management, LLC	1.36%	$35.9M	0.86%	Not reported
Cormorant Asset Management, LP	1.15%	$30.4M	1.56%	Reduce 50.89%
Soleus Capital Management, L.P.	1.07%	$28.4M	0.98%	Not reported
Goldman Sachs Group Inc	0.96%	$25.3M	0.00%	Not reported
Marshall Wace, LLP	0.84%	$22.2M	0.02%	Not reported
EcoR1 Capital, LLC	0.81%	$21.4M	1.04%	Reduce 50.00%
Vanguard Portfolio Management LLC	0.72%	$19.1M	0.00%	Not reported
Bank of America Corp	0.62%	$16.5M	0.00%	Not reported
Rock Springs Capital Management LP	0.62%	$16.5M	0.80%	Add 3.56%
UBS Group AG	0.57%	$15.1M	0.00%	Not reported
Opaleye Management Inc.	0.54%	$14.4M	1.30%	Not reported
Schonfeld Strategic Advisors LLC	0.52%	$13.7M	0.05%	Not reported
Morgan Stanley	0.52%	$13.7M	0.00%	Not reported
Northern Trust Corp	0.51%	$13.6M	0.00%	Not reported
Dimensional Fund Advisors LP	0.49%	$12.9M	0.00%	Not reported
Charles Schwab Investment Management Inc	0.49%	$12.9M	0.00%	Not reported
Millennium Management LLC	0.47%	$12.5M	0.00%	Not reported
Tetragon Partners GP Ltd	0.42%	$11.2M	1.77%	Add 39.91%
Vanguard Fiduciary Trust Co	0.42%	$11.1M	0.00%	Not reported
Caligan Partners LP	0.42%	$11M	0.52%	Reduce 76.43%
D. E. Shaw & Co., Inc.	0.38%	$10.1M	0.00%	Not reported
JPMorgan Chase & Co	0.29%	$7.52M	0.00%	Not reported
KVP Capital Advisors, LP	0.25%	$6.71M	4.92%	Not reported
Two Sigma Investments, LP	0.24%	$6.26M	0.00%	Not reported
Burkehill Global Management, LP	0.21%	$5.52M	0.20%	Not reported
Nuveen, LLC	0.21%	$5.45M	0.00%	Not reported
Elmind Capital, LP	0.19%	$5.02M	1.26%	Reduce 56.87%
Bank of New York Mellon Corp	0.19%	$4.91M	0.00%	Not reported
Prudential Financial Inc	0.18%	$4.86M	0.01%	Not reported
Barclays PLC	0.18%	$4.85M	0.00%	Not reported

50 of 161 holders

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