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MBX Biosciences, Inc. (MBX)

MBX Biosciences, Inc. (MBX) Insider Trading

Directors, officers and holders of more than 10% of MBX report their trades in its stock on SEC Form 4, within two business days. Each row below is one Form 4 transaction line. The one-letter code says what kind of transaction it was: only P (purchase) and S (sale) are open-market or private trades; awards, option exercises, tax withholding and gifts carry other codes.

Recent Form 4 transactions

The 50 most recent of 162 transactions on file: 5 with code P, 5 with code S and 40 with other codes.

DateInsiderCodeShares
Oct 20, 2026Radovich PeterA Award18,200
Aug 4, 2026Azoulay SalomonS Sale370
Aug 3, 2026Smither John WA Award28,000
Aug 3, 2026Smither John WA Award130,000
Aug 3, 2026Hoerter Steven L.A Award71,000
Aug 3, 2026Hoerter Steven L.A Award331,000
Jun 4, 2026Ryder StevenA Award12,500
Jun 4, 2026Heron Patrick JA Award12,500
Jun 4, 2026Hoerter Steven L.A Award12,500
Jun 4, 2026Pescovitz Ora H.A Award12,500
Jun 4, 2026Stelzer LaurieA Award12,500
Jun 4, 2026Aynechi TibaA Award12,500
Jun 4, 2026Mathers Edward TA Award12,500
May 8, 2026Azoulay SalomonM Exercise15,003
May 8, 2026Azoulay SalomonM Exercise55,000
May 8, 2026Azoulay SalomonM Exercise55,000
May 8, 2026Azoulay SalomonM Exercise15,003
May 8, 2026Azoulay SalomonS Sale15,003
May 8, 2026Azoulay SalomonS Sale55,000
May 6, 2026Hawryluk P. KentS Sale607
May 6, 2026Azoulay SalomonS Sale231
May 1, 2026Hoerter Steven L.A Award74,249
May 1, 2026Hoerter Steven L.A Award11,938
Mar 13, 2026Hawryluk P. KentP Purchase18,500
Feb 26, 2026Hawryluk P. KentM Exercise28,768
Feb 26, 2026Hawryluk P. KentM Exercise28,768
Feb 2, 2026Bartram RichardA Award70,000
Feb 2, 2026Azoulay SalomonA Award70,000
Feb 2, 2026Hawryluk P. KentA Award164,500
Feb 2, 2026Hawryluk P. KentA Award35,250
Feb 2, 2026Bartram RichardA Award15,000
Feb 2, 2026Azoulay SalomonA Award15,000
Jan 20, 2026Stelzer LaurieA Award32,000
Nov 22, 2025Hoerter Steven L.A Award8,000
Nov 22, 2025Hoerter Steven L.A Award0
Nov 6, 2025Hoerter Steven L.A Award33,751
Nov 6, 2025Hoerter Steven L.A Award100,000
Oct 24, 2025Hawryluk P. KentM Exercise182,859
Oct 24, 2025Hawryluk P. KentM Exercise182,859
Oct 20, 2025Hawryluk P. KentP Purchase20,000
Oct 17, 2025Hoerter Steven L.P Purchase20,000
Sep 26, 2025Heron Patrick JP Purchase666,666
Jun 5, 2025CORNELIUS JAMES MA Award16,000
Jun 5, 2025Ryder StevenA Award16,000
Jun 5, 2025Pescovitz Ora H.A Award16,000
Jun 5, 2025Aynechi TibaA Award16,000
Jun 5, 2025Heron Patrick JA Award16,000
Jun 5, 2025Mathers Edward TA Award16,000
Jun 5, 2025Hoerter Steven L.A Award16,000
Apr 8, 2025Pescovitz Ora H.P Purchase7,693

The full Form 4 history is on the MBX company page (Insider Trades card, View all).

Questions about this data

Which insider transactions are open-market trades?

Code P (open market or private purchase) and code S (open market or private sale). Code F is shares withheld to pay tax on vesting stock, A is an award from the company, M and X are option exercises and G is a gift. None of those is the insider choosing to buy or sell in the market.

How quickly are insider trades reported?

A Form 4 is due before the end of the second business day after the trade. The date shown is the transaction date from the form.

Who has to file Form 4?

Officers, directors and beneficial owners of more than 10% of a class of the company’s registered equity, under Section 16 of the Securities Exchange Act.

Look up any code in the Form 4 transaction code reference, or read Form 4 codes explained.