Kenneweg John 4

4 · 908 Devices Inc. · Filed May 4, 2026

AI-generated summary of this filing

Updated May 4, 2026

908 Devices SVP John Kenneweg Sells 7,787 Shares After PSU Vest

What Happened

John Kenneweg, SVP, Sales & Product Marketing at 908 Devices (MASS), had 26,042 performance stock units (PSUs) vest and convert into 26,042 shares on May 1, 2026. As part of the settlement, 7,787 of those shares were sold in an open-market "sell-to-cover" transaction at $6.83 per share for proceeds of $53,185. The PSUs converted at no exercise price.

Key Details

Transaction date: May 1, 2026; Form 4 filed May 4, 2026.
Acquired (conversion of PSUs): 26,042 shares (derivative conversion, no purchase price).
Sold (open market / sell-to-cover): 7,787 shares at $6.83 each, total proceeds $53,185.
Net shares retained from this vesting event: 26,042 − 7,787 = 18,255 shares.
Shares owned after transaction: not reported in the provided filing excerpt.
Footnotes: F1 — each PSU converts to one common share when vested; F2 — the sale was a mandatory sell-to-cover to satisfy tax withholding (not a discretionary trade by the insider); F3 — PSUs vested on May 1, 2026 and had no expiration.
No indication in the provided data that this filing was late.

Context

This was a routine vesting-and-tax-withholding transaction: PSUs vested and converted to shares, and some of those shares were sold solely to cover tax obligations. Such sell-to-cover sales are common and do not necessarily signal the insider’s view on the company’s outlook.
The derivative entries reflect the conversion/settlement of PSUs (not an options purchase).

Form 4

Period: 2026-05-01

SVP, Sales & Product Marketing

Transactions

Exercise/Conversion
Common Stock
[F1]
2026-05-01+26,042→ 83,826 total
Sale
Common Stock
[F2]
2026-05-01$6.83/sh−7,787$53,185→ 76,039 total
Exercise/Conversion
Performance Stock Units
[F1][F3]
2026-05-01−26,042→ 0 total
→ Common Stock (26,042 underlying)

Footnotes (3)

[F1]Each performance stock unit ("PSU") represents a contingent right to receive one share of Common Stock, par value $0.001, when vested.
[F2]The sale reported on this Form 4 represents shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting and settlement of PSUs. The sale is mandated by the Issuer's election to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary transaction by the Reporting Person.
[F3]The PSUs vested, in accordance with their terms, on May 1, 2026. The PSUs had no expiration date.

Signature

/s/ Mark S. Levine, Attorney-in-Fact|2026-05-04

1 file