Senior insider sale
Chief Financial Officer at MBX BIOSCIENCES, INC. — senior position signals high conviction
$300.5K
10K shares
What this filing means
BARTRAM RICHARD plans to sell 10K shares of MBX BIOSCIENCES, INC. valued at approximately $300.5K. Form 144 is a notice of intent to sell restricted or control securities — not a mandatory transaction. This filing provides advance warning of potential selling pressure.
Filed: 3/16/2026ACC: 0001959173-26-002351
Officer· Chief Financial Officer
Since Feb 2026
10K
Shares to sell
$300.5K
Approx. market value
10K
Acquired (3 months)
1
Planned
Securities Acquired — Last 3 Months2
Option Granted - 04/20/2022
Cash
3/16/2026
7.50KOption Granted - 11/07/2022
Cash
3/16/2026
2.50KTotal acquired10K
| Acquisition Date | Type | Amount Acquired | Gift |
|---|---|---|---|
3/16/2026 | Option Granted - 04/20/2022 Cash | 7.50K | — |
3/16/2026 | Option Granted - 11/07/2022 Cash | 2.50K | — |
| Total | 10K | ||
Planned & Completed Dispositions1
NASDAQPlanned
Units to sell
10K
Market value
$300.5K
3/16/2026
Total
Units
10K
Value
$300.5K
| Date | Units to Sell | Approx. Market Value | Exchange | Status |
|---|---|---|---|---|
3/16/2026 | 10K | $300.5K | NASDAQ | Planned |
| Total | 10K | $300.5K | ||