MBX
insider transactionsMBX Biosciences, Inc. — buys & sells by directors, officers and 10% owners A shareholder owning more than 10% of the company. Must report trades, but usually a weaker signal than an officer or director. (SEC Form 4).
Cluster buy signal: Multiple insiders at the same company buying around the same time — often a stronger signal than a single buy. 3 different insiders made open-market purchases in the last 365 days, totalling $13.1M.
Net shares · 365d
+654.3K
725.2K buy · 70.8K sell
Net value · 365d
$10.4M
$13.1M in · $2.7M out
Sentiment · 365d
Net buying
83% buying · 17% selling
Open-market trades · 365d
8
725.2K buy · 70.8K sell
Net buy / sell volume
Not enough data to chart yet.
Tap or hover the chart for daily net volume. Green = net buying, red = net selling.
All transactions
-
Grant·A
Director
$0
12.5K sh
Own New
-
Grant·A
Director
$0
12.5K sh
Own New
-
Grant·A
Director
$0
12.5K sh
Own New
-
Grant·A
Director
$0
12.5K sh
Own New
-
Grant·A
Director
$0
12.5K sh
Own New
-
Grant·A
Director, 10% Owner
$0
12.5K sh
Own New
-
Grant·A
Director
$0
12.5K sh
Own New
-
Exercise·M
Chief Medical Officer · 10b5-1
$0
15.0K sh
Own +100%
-
Exercise·M
Chief Medical Officer · 10b5-1
$0
55.0K sh
Own +39%
-
Sell·S
Chief Medical Officer · 10b5-1
$574.6K
15.0K sh · $38.30
Own -50%
-
Exercise·M
Chief Medical Officer · 10b5-1
$240.0K
15.0K sh · $16.00
Own +102%
-
Sell·S
Chief Medical Officer · 10b5-1
$2.1M
55.0K sh · $38.38
Own -79%
-
Exercise·M
Chief Medical Officer · 10b5-1
$575.3K
55.0K sh · $10.46
Own +372%
-
Sell·S
Hawryluk P. Kent KEY
President & CEO
$17.9K
607 sh · $29.54
Own -0%
-
Sell·S
Chief Medical Officer
$6.8K
231 sh · $29.54
Own -2%
-
Grant·A
Director
$0
74.2K sh
Own New
-
Grant·A
Director
$0
11.9K sh
Own New
-
Buy·P
Hawryluk P. Kent KEY
President & CEO
$525.6K
18.5K sh · $28.41
Own +4%
-
Exercise·M
Hawryluk P. Kent KEY
President & CEO
$0
28.8K sh
Own +46%
-
Exercise·M
Hawryluk P. Kent KEY
President & CEO
$460.3K
28.8K sh · $16.00
Own +4%
-
Grant·A
Chief Medical Officer
$0
70.0K sh
Own New
-
Grant·A
Chief Medical Officer
$0
15.0K sh
Own New
-
Grant·A
Hawryluk P. Kent KEY
President & CEO
$0
164.5K sh
Own New
-
Grant·A
Hawryluk P. Kent KEY
President & CEO
$0
35.2K sh
Own +5%
-
Grant·A
Bartram Richard KEY
Chief Financial Officer
$0
70.0K sh
Own New
-
Grant·A
Bartram Richard KEY
Chief Financial Officer
$0
15.0K sh
Own New
-
Grant·A
Director
$0
32.0K sh
Own New
-
Grant·A
Director
$0
0 sh
-
Grant·A
Director
$0
8.0K sh
Own New
-
Grant·A
Director
$0
33.8K sh
Own New
-
Grant·A
Director
$0
100.0K sh
Own New
-
Exercise·M
Hawryluk P. Kent KEY
President & CEO
$0
182.9K sh
Own New
-
Exercise·M
Hawryluk P. Kent KEY
President & CEO
$594.3K
182.9K sh · $3.25
Own +38%
-
Buy·P
Hawryluk P. Kent KEY
President & CEO
$272.8K
20.0K sh · $13.64
Own +4%
-
Buy·P
Director
$265.0K
20.0K sh · $13.25
Own New
-
Buy·P
TenPercentOwner
$12.0M
666.7K sh · $18.00
Own +15%
| Date▾ | Insider | Type | Shares | Value |
|---|---|---|---|---|
| Jun 4, 2026 | Mathers Edward T | Grant A | 12.5K | $0 |
| Jun 4, 2026 | Pescovitz Ora H. | Grant A | 12.5K | $0 |
| Jun 4, 2026 | Stelzer Laurie | Grant A | 12.5K | $0 |
| Jun 4, 2026 | Ryder Steven | Grant A | 12.5K | $0 |
| Jun 4, 2026 | Hoerter Steven L. | Grant A | 12.5K | $0 |
| Jun 4, 2026 | Heron Patrick J | Grant A | 12.5K | $0 |
| Jun 4, 2026 | Aynechi Tiba | Grant A | 12.5K | $0 |
| May 8, 2026 | Azoulay Salomon 10b5-1 | Exercise M | 15.0K | $0 |
| May 8, 2026 | Azoulay Salomon 10b5-1 | Exercise M | 55.0K | $0 |
| May 8, 2026 | Azoulay Salomon 10b5-1 | Sell S | 15.0K | $574.6K |
| May 8, 2026 | Azoulay Salomon 10b5-1 | Exercise M | 15.0K | $240.0K |
| May 8, 2026 | Azoulay Salomon 10b5-1 | Sell S | 55.0K | $2.1M |
| May 8, 2026 | Azoulay Salomon 10b5-1 | Exercise M | 55.0K | $575.3K |
| May 6, 2026 | Hawryluk P. Kent KEY | Sell S | 607 | $17.9K |
| May 6, 2026 | Azoulay Salomon | Sell S | 231 | $6.8K |
| May 1, 2026 | Hoerter Steven L. | Grant A | 74.2K | $0 |
| May 1, 2026 | Hoerter Steven L. | Grant A | 11.9K | $0 |
| Mar 13, 2026 | Hawryluk P. Kent KEY | Buy P | 18.5K | $525.6K |
| Feb 26, 2026 | Hawryluk P. Kent KEY | Exercise M | 28.8K | $0 |
| Feb 26, 2026 | Hawryluk P. Kent KEY | Exercise M | 28.8K | $460.3K |
| Feb 2, 2026 | Azoulay Salomon | Grant A | 70.0K | $0 |
| Feb 2, 2026 | Azoulay Salomon | Grant A | 15.0K | $0 |
| Feb 2, 2026 | Hawryluk P. Kent KEY | Grant A | 164.5K | $0 |
| Feb 2, 2026 | Hawryluk P. Kent KEY | Grant A | 35.2K | $0 |
| Feb 2, 2026 | Bartram Richard KEY | Grant A | 70.0K | $0 |
| Feb 2, 2026 | Bartram Richard KEY | Grant A | 15.0K | $0 |
| Jan 20, 2026 | Stelzer Laurie | Grant A | 32.0K | $0 |
| Nov 22, 2025 | Hoerter Steven L. | Grant A | 0 | $0 |
| Nov 22, 2025 | Hoerter Steven L. | Grant A | 8.0K | $0 |
| Nov 6, 2025 | Hoerter Steven L. | Grant A | 33.8K | $0 |
| Nov 6, 2025 | Hoerter Steven L. | Grant A | 100.0K | $0 |
| Oct 24, 2025 | Hawryluk P. Kent KEY | Exercise M | 182.9K | $0 |
| Oct 24, 2025 | Hawryluk P. Kent KEY | Exercise M | 182.9K | $594.3K |
| Oct 20, 2025 | Hawryluk P. Kent KEY | Buy P | 20.0K | $272.8K |
| Oct 17, 2025 | Hoerter Steven L. | Buy P | 20.0K | $265.0K |
| Sep 26, 2025 | FHMLS X, L.P. | Buy P | 666.7K | $12.0M |
About MBX insider trading
This page tracks insider transactions for MBX Biosciences, Inc. (MBX) reported to the U.S. Securities and Exchange Commission on Form 4. Corporate insiders — directors, executive officers and beneficial owners of more than 10% of the stock — must disclose their trades within two business days. Open-market purchases (code P) and sales (code S) made at the insider's discretion are the most-watched opportunistic signals, while awards (A), option exercises (M) and tax-withholding (F) reflect compensation rather than conviction. Trades marked 10b5-1 were made under a pre-arranged plan and are considered routine. A cluster buy — several insiders buying within a short window — is historically a stronger bullish indicator than any single trade.