Form 4 for MASS 908 Devices Inc.
Accepted 2025-06-27 00:00:00 ET · period of report 2025-06-25 · accession 0001562180-25-005098 · 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 | 2025-06-27 | 2025-06-25 | MASS | Leonhart Michele M. | Dir | M - OptEx | — | +6,485 | 6,485 | New | — |
| D | 2025-06-27 | 2025-06-25 | MASS | Leonhart Michele M. | Dir | M - OptEx | $0.00 | -6,485 | 13.0K | -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 | 2025-06-25 | M | A | 6,485 | — | 6,485 | D | — | — | (F1) Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of Common Stock, par value $0.001, when vested. This transaction represents the settlement of RSUs in shares of Common Stock on their scheduled vesting date. |
| 2 | Derivative | Restricted Stock Units | 2025-06-25 | M | D | 6,485 | $0.00 | 12,971 | D | — · — to — | 6,485 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. This transaction represents the settlement of RSUs in shares of Common Stock on their scheduled vesting date. (F2) The RSUs become vested in substantially equal annual installments over the 3 years following June 25, 2024, 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. |