Form 4 for MBX MBX Biosciences, Inc.
Accepted 2026-05-04 08:01:56 ET · period of report 2026-05-01 · accession 0001193125-26-202615 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| D | 2026-05-04 08:01 | 2026-05-01 | MBX | Hoerter Steven L. | Dir | A - Grant | $0.00 | +11.9K | 11.9K | New | $0 |
| D | 2026-05-04 08:01 | 2026-05-01 | MBX | Hoerter Steven L. | Dir | A - Grant | $0.00 | +74.2K | 74.2K | New | $0 |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Common Stock | 2026-05-01 | A | A | 11,938 | $0.00 | 11,938 | D | — | — | (F1) Represents the grant of restricted stock units (RSUs). The RSUs will vest in full on November 6, 2026, subject to the Reporting Person's continued service on such vesting date. |
| 2 | Derivative | Stock option (right to buy) | 2026-05-01 | A | A | 74,249 | $0.00 | 74,249 | D | $29.78 · — to 2036-05-01 | 74,249 Common Stock | (F3) The grant will vest 50% upon grant date and the remaining 50% in equal monthly installments over a six-month period from the grant date, subject to the Reporting Person's continued services to the Company. |