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908 Devices Inc.·4

Jun 12, 4:46 PM ET

CRANDELL KEITH 4

Research Summary

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908 Devices (MASS) Director Crandell Keith Exercises Options, Receives RSUs

What Happened
Crandell Keith (director; managing director of ARCH VII LLC) reported exercising/converting 14,083 derivative shares on June 10, 2026 and a simultaneous disposition of 14,083 derivative shares reported at $0. On June 11, 2026 he reported awards of 13,656 RSUs and 6,209 RSUs (total 19,865 RSUs), each reported at $0. No cash proceeds or dollar values are shown in the reported transactions.

Key Details

  • Transaction dates and types:
    • 2026-06-10: Exercise/conversion of derivative (M) — 14,083 shares acquired; same day disposition of 14,083 shares at $0 (reported as derivative).
    • 2026-06-11: Grants/awards (A) — 13,656 RSUs and 6,209 RSUs acquired; reported at $0.
  • Shares owned after the transactions: Not disclosed in the provided excerpt.
  • Footnotes of note:
    • F1: Each RSU = contingent right to receive one common share when vested.
    • F2: Securities are held by ARCH Venture Fund VII, L.P.; Keith is a managing director of the general partner and disclaims beneficial ownership except for pecuniary interest.
    • F3: Some RSUs became fully vested on June 10, 2026.
    • F4: Other RSUs vest June 11, 2027 (or the day before the 2027 annual meeting), subject to continued service; prorated vesting if service terminates.
    • F5: The shares underlying the option vest monthly over the 12 months following June 11, 2026 (per filing).
  • Filing timeliness: Form 4 filed 2026-06-12 for transactions dated 6/10–6/11/2026 — appears to be filed within the usual two-business-day window.

Context

  • The June 10 exercise and same-day $0 disposition are reported as derivative transactions; Form 4s often show such dispositions when shares are surrendered or net-settled to satisfy exercise costs or tax withholding (the filing here reports $0 proceeds).
  • The June 11 entries are RSU awards—these are equity grants that convert to shares upon vesting (per F1–F4).
  • Note this reporting involves institutional ownership via ARCH Venture Fund VII; the reporting person is affiliated with that fund and disclaims direct beneficial ownership except to the extent of any pecuniary interest.