Senior insider sale
Chief Financial Officer at MBX BIOSCIENCES, INC. — senior position signals high conviction
$831.1K
26.48K shares
What this filing means
BARTRAM RICHARD plans to sell 26.48K shares of MBX BIOSCIENCES, INC. valued at approximately $831.1K. 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: 5/1/2026ACC: 0001959173-26-003192
Officer· Chief Financial Officer
Since Feb 2026
26.48K
Shares to sell
$831.1K
Approx. market value
5K
Acquired (3 months)
1
Planned
3 completed
Securities Acquired — Last 3 Months2
Options Granted - 04/20/2022
Cash
5/1/2026
2.50KOptions Granted - 11/07/2022
Cash
5/1/2026
2.50KTotal acquired5K
| Acquisition Date | Type | Amount Acquired | Gift |
|---|---|---|---|
5/1/2026 | Options Granted - 04/20/2022 Cash | 2.50K | — |
5/1/2026 | Options Granted - 11/07/2022 Cash | 2.50K | — |
| Total | 5K | ||
Planned & Completed Dispositions4
Completed
—Completed
Units to sell
10.42K
Market value
$341.4K
4/22/2026
—Completed
Units to sell
1.06K
Market value
$30.2K
3/25/2026
—Completed
Units to sell
10K
Market value
$300.5K
3/16/2026
Planned — Approximate Date
NASDAQPlanned
Units to sell
5K
Market value
$159.0K
5/1/2026
Total
Units
26.48K
Value
$831.1K
| Date | Units to Sell | Approx. Market Value | Exchange | Status |
|---|---|---|---|---|
| Completed | ||||
4/22/2026 | 10.42K | $341.4K | — | Completed |
3/25/2026 | 1.06K | $30.2K | — | Completed |
3/16/2026 | 10K | $300.5K | — | Completed |
| Planned — Approximate Date | ||||
5/1/2026 | 5K | $159.0K | NASDAQ | Planned |
| Total | 26.48K | $831.1K | ||