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$MBX All transactions

MBX Biosciences, Inc.

▲ BUY
9 / 10

Conviction

$ Value

$12.0M

Shares

666,666

Price

$18

Filed

Sep 30

Why this score? (9/10)
  • Open market buy (+3)
  • Trade value >= $5.0M (+3)
  • Director (+1)
  • 10%+ owner (+1)
  • Not a 10b5-1 plan (+1)

Insider

Name

Heron Patrick J

Title

CIK

0001365617

Roles

Director 10% Owner

Transaction Details

Transaction Date

2025-09-26

Code

P

Table

Non-Derivative

Ownership

Indirect

Equity Swap

No

Shares After

5,219,440

Footnotes

The shares reported herein are held of record by Frazier Life Sciences X, L.P. FHMLS X, L.P. is the general partner of Frazier Life Sciences X, L.P. and FHMLS X, L.L.C. is the general partner of FHMLS X, L.P. James N. Topper and Patrick J. Heron are the sole managing members of FHMLS X, L.L.C. and share voting and investment power over the shares held by Frazier Life Sciences X, L.P. Dr. Topper and Mr. Heron disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein.

Filing Info

Accession No.

0001231919-25-000267

Form Type

4

Issuer CIK

0001776111

Heron Patrick J's History

Date Ticker Type Value
2026-01-23 MIRM J
2026-01-23 MIRM $9.0M
2025-09-26 MBX $12.0M
2025-06-23 HLVX A $0
2025-06-13 ARQT $35K
2025-06-12 ARQT A $0
2025-06-12 ARQT A $0
2025-06-05 ARQT $5K
2025-06-05 MBX A $0
2025-06-04 ARQT $25K

Other Insiders at MBX (90d)

Insider Bought Sold Last
Hawryluk P. Kent
President & CEO
$526K 2026-03-13
Hoerter Steven L. 2025-11-22
Bartram Richard
Chief Financial Officer
2026-02-02
Azoulay Salomon
Chief Medical Officer
2026-02-02