Insider filing · MBX

Patrick J Heron bought $12.0M of MBX Biosciences (MBX)

Executed Sep 26 2025, disclosed Sep 30 2025, 4 days later.

Over the 21 trading sessions from the disclosed entry session (Sep 30 2025), the stock returned +0.1% (delay-adjusted); from the execution session (Sep 26 2025), -0.3%. Derived: entry at the session's open, exit at the close 20 sessions later.

PH Patrick J Heron Director profile →

Patrick J Heron (Director) filed 2 Form 4 reports in the trailing twelve months (2 purchases, 0 sales), most often in MBX. Across 2 priced purchase filings, the average 21-session return was +4.9% from execution and +6.1% from disclosure (delay-adjusted; derived). The largest single filing was $12.0M of MBX (666,666 sh × $18.00, as filed), executed Sep 26 2025.

MBX MBX MBX · 8 filings in 24 months ticker → Insider filings, newest first→ View the original filing at www.sec.gov→