Senior insider sale
Chief Financial Officer at MBX BIOSCIENCES, INC. — senior position signals high conviction
$672.1K
21.48K shares
What this filing means
BARTRAM RICHARD plans to sell 21.48K shares of MBX BIOSCIENCES, INC. valued at approximately $672.1K. 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: 4/22/2026ACC: 0001959173-26-003033
Officer· Chief Financial Officer
Since Feb 2026
21.48K
Shares to sell
$672.1K
Approx. market value
10.42K
Acquired (3 months)
1
Planned
2 completed
Securities Acquired — Last 3 Months3
Option Granted 04/20/2022
Cash
4/22/2026
2.81KOption Granted 11/07/2022
Cash
4/22/2026
2.81KOption Granted 08/15/2023
Cash
4/22/2026
4.81KTotal acquired10.42K
| Acquisition Date | Type | Amount Acquired | Gift |
|---|---|---|---|
4/22/2026 | Option Granted 04/20/2022 Cash | 2.81K | — |
4/22/2026 | Option Granted 11/07/2022 Cash | 2.81K | — |
4/22/2026 | Option Granted 08/15/2023 Cash | 4.81K | — |
| Total | 10.42K | ||
Planned & Completed Dispositions3
Completed
—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
10.42K
Market value
$341.4K
4/22/2026
Total
Units
21.48K
Value
$672.1K
| Date | Units to Sell | Approx. Market Value | Exchange | Status |
|---|---|---|---|---|
| Completed | ||||
3/25/2026 | 1.06K | $30.2K | — | Completed |
3/16/2026 | 10K | $300.5K | — | Completed |
| Planned — Approximate Date | ||||
4/22/2026 | 10.42K | $341.4K | NASDAQ | Planned |
| Total | 21.48K | $672.1K | ||