MBX Biosciences, Inc. Insider Trading

MBX

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Last 12 months

Insiders bought 526K and sold $2.73M on the open market.

98% of the selling was scheduled in advance under 10b5-1 plans.

Net open-market

−$2.21M

1 buy · 4 sales

Under a 10b5-1 plan

98%

of the value sold

Insiders who bought / sold

1 / 2

executives and directors

Last open-market buy

Mar 2026

Mar 13, 2026

Get an email when MBX's executives or directors buy, or make a large sale outside a plan.

Trades · last 2 years

Date	Insider	Trade	Shares	Price	Value	Of their stake	Filing
Aug 4	Salomon Azoulay Chief Medical Officer	SoldNo plan	370	$65.77	24K	2.5%	Form 4
May 8	Salomon Azoulay Chief Medical Officer	Sold10b5-1 plan 2 parts	70,003	$38.36 average	$2.69M	83%	Form 4
May 6	Salomon Azoulay Chief Medical Officer	SoldNo plan	231	$29.54	7K	1.5%	Form 4
May 6	P. Kent Hawryluk President & CEO	SoldNo plan	607	$29.54	18K	<0.1%	Form 4
Mar 13	P. Kent Hawryluk President & CEO	Bought	18,500	$28.41	526K	1.5%	Form 4
Oct 20, 2025	P. Kent Hawryluk President & CEO	Bought	20,000	$13.64	273K	2.2%	Form 4
Oct 17, 2025	Steven L. Hoerter Director	Bought	20,000	$13.25	265K	New	Form 4
Sep 26, 2025	Fhmls X, L.p. Large holder	Bought	666,666	$18.00	$12M	15%	Form 4
Apr 8, 2025	Ora H. Pescovitz Director	Bought	7,693	$5.89	45K	46%	Form 4
Feb 14, 2025 – Feb 18, 2025	Carl L Gordon Director	Bought 4 parts	190,672	$10.60 average	$2.02M	34%	Form 4
Feb 14, 2025 – Feb 18, 2025	Orbimed Genesis GP LLC Large holder	Bought 4 parts	190,672	$10.60 average	$2.02M	34%	Form 4
Feb 4, 2025	P. Kent Hawryluk President & CEO	Bought	50,000	$10.69	535K	5.7%	Form 4

Aug 4No plan
Salomon Azoulay
Chief Medical Officer · sold 370 at $65.77
24K
2.5% of stake
May 810b5-1 plan
Salomon Azoulay
Chief Medical Officer · sold 70,003 at avg $38.36
$2.69M
83% of stake
May 6No plan
Salomon Azoulay
Chief Medical Officer · sold 231 at $29.54
7K
1.5% of stake
May 6No plan
P. Kent Hawryluk
President & CEO · sold 607 at $29.54
18K
<0.1% of stake
Mar 13
P. Kent Hawryluk
President & CEO · bought 18,500 at $28.41
526K
1.5% of stake
Oct 20, 2025
P. Kent Hawryluk
President & CEO · bought 20,000 at $13.64
273K
2.2% of stake
Oct 17, 2025
Steven L. Hoerter
Director · bought 20,000 at $13.25
265K
New position
Sep 26, 2025
Fhmls X, L.p.
Large holder · bought 666,666 at $18.00
$12M
15% of stake
Apr 8, 2025
Ora H. Pescovitz
Director · bought 7,693 at $5.89
45K
46% of stake
Feb 14, 2025 – Feb 18, 2025
Carl L Gordon
Director · bought 190,672 at avg $10.60
$2.02M
34% of stake
Feb 14, 2025 – Feb 18, 2025
Orbimed Genesis GP LLC
Large holder · bought 190,672 at avg $10.60
$2.02M
34% of stake
Feb 4, 2025
P. Kent Hawryluk
President & CEO · bought 50,000 at $10.69
535K
5.7% of stake

How to read this. Insiders sell for many reasons: taxes, diversifying, a house. Open-market buys are rarer and say more. A 10b5-1 plan is a trading schedule set up months in advance, so those sales were not timed on news. Large holders (funds and 10% owners) are listed under Everything but not counted as insiders. If you own or watch MBX, we send a push when an executive buys or makes a large sale outside a plan.

Source: SEC Form 4 filings, filed within two business days of each trade and checked for new ones every hour.

Peers

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Held by ETFs

MBX is in 44 US ETFs. The largest of them, with MBX's weight in each:

Spot a number that looks wrong? Check it in MBX's SEC filings or

Download this analysis as a PDF (Pro)

Data sourced from SEC EDGAR filings and third-party price providers. Scores, valuations, and metrics are algorithmic estimates. This is not investment advice. See our Terms and Methodology.

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