Form 4 for MASS 908 Devices Inc.
Accepted 2026-08-03 16:15:06 ET · period of report 2026-08-01 · accession 0002081945-26-000005 · 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 | 2026-08-03 16:15 | 2026-08-01 | MASS | Vann Brandi C | Dir | M - OptEx | — | +5,192 | 5,192 | New | — |
| D | 2026-08-03 16:15 | 2026-08-01 | MASS | Vann Brandi C | Dir | M - OptEx | $0.00 | -5,192 | 10.4K | -33% | $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 | 2026-08-01 | M | A | 5,192 | — | 5,192 | D | — | — | (F1) Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of Common Stock, par value $0.001, when vested. |
| 2 | Derivative | Restricted Stock Unit | 2026-08-01 | M | D | 5,192 | $0.00 | 10,385 | D | — · — to — | 5,192 Common Stock | (F1) Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of Common Stock, par value $0.001, when vested. (F2) The RSUs become vested in substantially equal annual installments over the 3 years following August 1, 2025, subject to the reporting person's continued service through the applicable vesting date, provided that, if the reporting person terminates their service for any reason, then a prorated number of RSUs will vest. The RSUs have no expiration date. (F3) The RSUs become vested in substantially equal annual installments over the 3 years following August 1, 2025, subject to the reporting person's continued service through the applicable vesting date, provided that, if the reporting person terminates their service for any reason, then a prorated number of RSUs will vest. The RSUs have no expiration date. |