MBX Biosciences, Inc. (MBX)

Latest Insider Confidence Score

2026Q1

52.5
Bullish

Company insider confidence (by quarter)

2024Q3 2026Q1

Largest shareholders

Insider Role (last 12 mo) Shares held Filed at
Heron Patrick J Director 5,219,440 Sep 30, 2025
Topper James N 10% Owner 5,219,440 Sep 30, 2025
Frazier Life Sciences X, L.P. 10% Owner 5,219,440 Sep 30, 2025
Fhmls X, L.P. 10% Owner 5,219,440 Sep 30, 2025
Fhmls X, L.L.C. 10% Owner 5,219,440 Sep 30, 2025

Recent buy/sell transactions

Exec date Filing date Insider Role Signal Confidence Shares % of shares Under plan? Amount (USD)
Feb 26, 2026 Feb 27, 2026 Hawryluk P. Kent CEO Neutral 52.5 - 0.00% ✗ -
Feb 2, 2026 Feb 3, 2026 Azoulay Salomon Chief Medical Officer Neutral 90.0 +15,000 100.00% ✗ -
Feb 2, 2026 Feb 3, 2026 Bartram Richard CFO Neutral 90.0 +15,000 100.00% ✗ -
Feb 2, 2026 Feb 3, 2026 Hawryluk P. Kent CEO Neutral 82.5 +35,250 3.11% ✗ -
Jan 20, 2026 Jan 22, 2026 Stelzer Laurie Director Neutral 52.5 - 0.00% ✗ -
Jan 22, 2026 Stelzer Laurie Director Neutral 52.5 - 0.00% ✗ -
Nov 22, 2025 Nov 25, 2025 Hoerter Steven L. Director Neutral 52.5 - 0.00% ✗ -
Nov 6, 2025 Nov 7, 2025 Hoerter Steven L. Director Neutral 52.5 - 0.00% ✗ -
Oct 24, 2025 Oct 28, 2025 Hawryluk P. Kent CEO Neutral 52.5 - 0.00% ✗ -
Oct 20, 2025 Oct 21, 2025 Hawryluk P. Kent CEO Buy 85.0 +20,000 2.15% ✗ $272.8K
Oct 17, 2025 Oct 20, 2025 Hoerter Steven L. Director Buy 97.5 +20,000 100.00% ✗ $265K
Sep 26, 2025 Sep 30, 2025 Heron Patrick J Director Buy 100.0 +666,666 14.64% ✗ $12M
Jun 5, 2025 Jun 6, 2025 Mathers Edward T Director Neutral 52.5 - 0.00% ✗ -
Jun 5, 2025 Jun 6, 2025 Hoerter Steven L. Director Neutral 52.5 - 0.00% ✗ -
Jun 5, 2025 Jun 6, 2025 Aynechi Tiba Director Neutral 52.5 - 0.00% ✗ -
Jun 5, 2025 Jun 6, 2025 CORNELIUS JAMES M Director Neutral 52.5 - 0.00% ✗ -
Jun 5, 2025 Jun 6, 2025 Ryder Steven Director Neutral 52.5 - 0.00% ✗ -
Jun 5, 2025 Jun 6, 2025 Heron Patrick J Director Neutral 52.5 - 0.00% ✗ -
Jun 5, 2025 Jun 6, 2025 Pescovitz Ora H. Director Neutral 52.5 - 0.00% ✗ -
Apr 8, 2025 Apr 10, 2025 Pescovitz Ora H. Director Buy 91.3 +7,693 46.24% ✗ $45.3K
Apr 7, 2025 Apr 9, 2025 Hoerter Steven L. Director Neutral 52.5 - 0.00% ✗ -
Apr 7, 2025 Hoerter Steven L. Director Neutral 52.5 - 0.00% ✗ -
Feb 14, 2025 Feb 19, 2025 GORDON CARL L Director Buy 87.5 +190,672 1.87% ✗ $2M
Feb 14, 2025 Feb 19, 2025 ORBIMED ADVISORS LLC Director Buy 87.5 +190,672 1.87% ✗ $2M
Feb 3, 2025 Feb 5, 2025 Azoulay Salomon Chief Medical Officer Neutral 52.5 - 0.00% ✗ -
Feb 3, 2025 Feb 5, 2025 Bartram Richard CFO Neutral 52.5 - 0.00% ✗ -
Feb 4, 2025 Feb 5, 2025 Hawryluk P. Kent CEO Buy 92.5 +50,000 5.68% ✗ $534.5K
Sep 16, 2024 Sep 17, 2024 Mathers Edward T Director Buy 100.0 +500,000 16.05% ✗ $8M
Sep 16, 2024 Sep 17, 2024 BASKETT FOREST 10% Owner Buy 100.0 +500,000 16.05% ✗ $8M
Sep 16, 2024 Sep 17, 2024 Behbahani Ali 10% Owner Buy 100.0 +500,000 16.05% ✗ $8M
Sep 16, 2024 Sep 17, 2024 Chang Carmen 10% Owner Buy 100.0 +500,000 16.05% ✗ $8M
Sep 16, 2024 Sep 17, 2024 Florence Anthony A. Jr. 10% Owner Buy 100.0 +500,000 16.05% ✗ $8M
Sep 16, 2024 Sep 17, 2024 Makhzoumi Mohamad 10% Owner Buy 100.0 +500,000 16.05% ✗ $8M
Sep 16, 2024 Sep 17, 2024 Walker Paul Edward 10% Owner Buy 100.0 +500,000 16.05% ✗ $8M
Sep 16, 2024 Sep 17, 2024 Yang Rick 10% Owner Buy 100.0 +500,000 16.05% ✗ $8M
Sep 16, 2024 Sep 17, 2024 SANDELL SCOTT D 10% Owner Buy 100.0 +500,000 16.05% ✗ $8M
Sep 16, 2024 Sep 17, 2024 ORBIMED ADVISORS LLC Director Buy 100.0 +750,000 24.49% ✗ $12M
Sep 16, 2024 Sep 17, 2024 New Enterprise Associates 17, L.P. 10% Owner Buy 100.0 +500,000 16.05% ✗ $8M
Sep 16, 2024 Sep 17, 2024 Frazier Life Sciences X, L.P. 10% Owner Buy 100.0 +625,000 15.91% ✗ $10M
Sep 16, 2024 Sep 17, 2024 CORNELIUS JAMES M Director Neutral 52.5 - 0.00% ✗ -
Sep 16, 2024 Sep 17, 2024 Heron Patrick J Director Buy 100.0 +625,000 15.91% ✗ $10M
Sep 16, 2024 Sep 17, 2024 Hawryluk P. Kent CEO Neutral 52.5 - 0.00% ✗ -
Sep 16, 2024 Sep 17, 2024 Aynechi Tiba Director Buy 100.0 +750,000 54.10% ✗ $12M
Sep 16, 2024 Sep 17, 2024 GORDON CARL L Director Buy 100.0 +750,000 24.49% ✗ $12M
Sep 16, 2024 Sep 17, 2024 Wellington Biomedical Innovation Master Investors (Cayman) II L.P. 10% Owner Neutral 52.5 - 0.00% ✗ -
Sep 12, 2024 Sep 13, 2024 GORDON CARL L Director Neutral 52.5 - 0.00% ✗ -
Sep 12, 2024 Sep 13, 2024 Ryder Steven Director Neutral 52.5 - 0.00% ✗ -
Sep 12, 2024 Sep 13, 2024 Bartram Richard CFO Neutral 52.5 - 0.00% ✗ -
Sep 12, 2024 Sep 13, 2024 Azoulay Salomon Chief Medical Officer Neutral 52.5 - 0.00% ✗ -
Sep 12, 2024 Sep 13, 2024 Mathers Edward T Director Neutral 52.5 - 0.00% ✗ -
Sep 12, 2024 Sep 13, 2024 Hawryluk P. Kent CEO Neutral 52.5 - 0.00% ✗ -
Sep 12, 2024 Sep 13, 2024 Aynechi Tiba Director Neutral 52.5 - 0.00% ✗ -
Sep 12, 2024 Sep 13, 2024 Heron Patrick J Director Neutral 52.5 - 0.00% ✗ -
Sep 12, 2024 Sep 13, 2024 CORNELIUS JAMES M Director Neutral 52.5 - 0.00% ✗ -
Sep 12, 2024 Sep 13, 2024 Pescovitz Ora H. Director Neutral 52.5 - 0.00% ✗ -
Sep 12, 2024 Wellington Biomedical Innovation Master Investors (Cayman) II L.P. 10% Owner Neutral 52.5 - 0.00% ✗ -
Sep 12, 2024 Yang Rick 10% Owner Neutral 52.5 - 0.00% ✗ -
Sep 12, 2024 Walker Paul Edward 10% Owner Neutral 52.5 - 0.00% ✗ -
Sep 12, 2024 Hawryluk P. Kent CEO Neutral 52.5 - 0.00% ✗ -
Sep 12, 2024 SANDELL SCOTT D 10% Owner Neutral 52.5 - 0.00% ✗ -
Sep 12, 2024 Mathers Edward T Director Neutral 52.5 - 0.00% ✗ -
Sep 12, 2024 Makhzoumi Mohamad 10% Owner Neutral 52.5 - 0.00% ✗ -
Sep 12, 2024 Florence Anthony A. Jr. 10% Owner Neutral 52.5 - 0.00% ✗ -
Sep 12, 2024 Chang Carmen 10% Owner Neutral 52.5 - 0.00% ✗ -
Sep 12, 2024 Behbahani Ali 10% Owner Neutral 52.5 - 0.00% ✗ -
Sep 12, 2024 CORNELIUS JAMES M Director Neutral 52.5 - 0.00% ✗ -
Sep 12, 2024 BASKETT FOREST 10% Owner Neutral 52.5 - 0.00% ✗ -
Sep 12, 2024 Heron Patrick J Director Neutral 52.5 - 0.00% ✗ -
Sep 12, 2024 New Enterprise Associates 17, L.P. 10% Owner Neutral 52.5 - 0.00% ✗ -
Sep 12, 2024 Pescovitz Ora H. Director Neutral 52.5 - 0.00% ✗ -
Sep 12, 2024 Aynechi Tiba Director Neutral 52.5 - 0.00% ✗ -
Sep 12, 2024 Ryder Steven Director Neutral 52.5 - 0.00% ✗ -
Sep 12, 2024 GORDON CARL L Director Neutral 52.5 - 0.00% ✗ -
Sep 12, 2024 Frazier Life Sciences X, L.P. 10% Owner Neutral 52.5 - 0.00% ✗ -
Sep 12, 2024 ORBIMED ADVISORS LLC Director Neutral 52.5 - 0.00% ✗ -
Sep 12, 2024 Azoulay Salomon Chief Medical Officer Neutral 52.5 - 0.00% ✗ -
Sep 12, 2024 Bartram Richard CFO Neutral 52.5 - 0.00% ✗ -