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908 Devices Inc.·4

Jun 12, 4:46 PM ET

CRANDELL KEITH 4

4 · 908 Devices Inc. · Filed Jun 12, 2026

Research Summary

AI-generated summary of this filing

Updated

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.

Insider Transaction Report

Form 4
Period: 2026-06-10
908 Devices Inc.MASS
CRANDELL KEITH
Director
Transactions
  • Exercise/Conversion

    Common Stock

    [F1]
    2026-06-10+14,083→ 39,374 total
  • Exercise/Conversion

    Restricted Stock Units

    [F1][F3]
    2026-06-10−14,083→ 0 total
    → Common Stock (14,083 underlying)
  • Award

    Restricted Stock Units

    [F1][F4]
    2026-06-11+13,656→ 13,656 total
    → Common Stock (13,656 underlying)
  • Award

    Stock Option (option to buy)

    [F5]
    2026-06-11+6,209→ 6,209 total
    Exercise: $8.22Exp: 2036-06-10→ Common Stock (6,209 underlying)
Holdings

  • Common Stock

    [F2]
    (indirect: See footnote)
    5,725,045
Footnotes (5)
  • [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 securities are owned directly by ARCH Venture Fund VII, L.P. ("ARCH Fund VII"). The sole general partner of ARCH Fund VII is ARCH Venture Partners VII, L.P. ("ARCH Partners VII"), which may be deemed to be the beneficial owner of the securities held by ARCH Fund VII. The sole general partner of ARCH Partners VII is ARCH Venture Partners VII, LLC ("ARCH VII LLC"), which may be deemed to be the beneficial owner of the securities held by ARCH Fund VII. The reporting person is a managing director of ARCH VII LLC, and may be deemed to beneficially own the securities held by ARCH Fund VII. The reporting person disclaims beneficial ownership of such securities, except to the extent of his pecuniary interest therein.
  • [F3]The RSUs became fully vested on June 10, 2026, the day prior to the 2026 Annual Meeting of the Stockholders of 908 Devices Inc. The RSUs have no expiration date.
  • [F4]The RSUs become fully vested on June 11, 2027 or the day prior to the 2027 Annual Meeting of the Stockholders of 908 Devices Inc., whichever occurs first, 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.
  • [F5]The shares underlying the option become vested and exercisable in substantially equal monthly installments over the 12 months following June 11, 2026, subject to the reporting person's continued service through the applicable vesting date.
Signature
/s/ Mark S. Levine, Attorney-in-Fact|2026-06-12

Documents

2 files