Transaction · 0001836988-26-000002

Brown Christopher D.

Brown Christopher D., DIR, reported a transaction classified as exercise at 908 Devices Inc. involving 7418.000000 shares for an estimated $0.00. Reported holdings after the transaction were 7418.000000 shares. A 10b5-1 reference was not detected in the stored filing text.

exerciseSEC transaction code MDIR
MASS908 Devices Inc.
Filing timeFeb 04
Trade dateFeb 01, 2026
Filing · SECView on SEC
InsiderProfile

Price performance since filing

Close on the filing date, the pre-filing context, and the forward return at standard windows
Price at filing
$6.19
Pre-filing
1mo ago -17.8%1w ago -17.8%1d ago -17.8%
Returns since
7d +0.0%30d +6.8%90d +10.0%180d +36.0%1y +73.3%

MASS price since this filing

30 days of pre-filing context and vertical markers at the filing date plus 7d / 30d / 90d / 180d / 1y afterwards
MASS since 2026-02-04Filed 213 days ago · 30 days of pre-filing context shaded
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Filing datePost-filing windows (7d, 30d, 90d, 180d, 1y)30 days of pre-filing context

Transaction facts

Stored Form 4 columns with their raw values

Derivative
Type
exercise
Code M
Identifier
0001836988-26-000002
Restricted Stock Units
Transaction date
Feb 01, 2026
Filed Feb 04, 2026, 01:45 AM · 3d delay
Shares
7.41k sh
$0 per share
Estimated value
$0
Computed from shares × price
Holdings after
7.41k sh
Direct

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $10.0MLarge $100M
Derivative Transaction Direct Ownership Large Holdings Reduction
-10score
Filing-only score

-10

Compact filing score computed from stored Form 4 facts. Version v1.

Mixed or weak signal

This filing has a negative filing-only score. It may be less informative as an insider-activity signal and needs extra context.

Reported relationships & other filings

Form 4 relationship flags and nearby filing context

Reported roles

No officer title

Officer NoDirector Yes10% NoOther No
Footnotes & amended
  1. F1

    Each Restricted Stock Unit ("RSU") represents a contingent right to receive, at settlement, one share of Common Stock. This transaction represents the settlement of RSUs in shares of Common Stock on t…

  2. F2

    These RSUs vest in four substantially equal annual installments at the four anniversary dates following February 1, 2022, subject to the reporting person's continued service through the applicable ves…

  3. F3

    These RSUs vest in four substantially equal annual installments at the four anniversary dates following February 1, 2023, subject to the reporting person's continued service through the applicable ves…

  4. F4

    These RSUs vest in four substantially equal annual installments at the four anniversary dates following February 1, 2024, subject to the reporting person's continued service through the applicable ves…

Original filing · 0001836988-26-000002
Related transactions

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Same reporting owner
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