Transaction · 0001836988-26-000013

Brown Christopher D.

Brown Christopher D., DIR, reported an open-market or private sale at 908 Devices Inc. involving 100.000000 shares for an estimated $900.00. Reported holdings after the transaction were 875459.000000 shares. The stored filing text includes a detected 10b5-1 reference.

Open-market sellSEC transaction code SDIR
MASS908 Devices Inc.
Filing timeJun 05
Trade dateJun 04, 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
$7.93
Pre-filing
1mo ago -10.6%1w ago +12.6%1d ago +9.2%
Returns since
7d +4.3%30d +9.6%90d +38.1%180d +38.1%1y +38.1%

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 2026-06-05Filed 92 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

Non-derivative
Type
Sell
Code S
Identifier
0001836988-26-000013
Common Stock
Transaction date
Jun 04, 2026
Filed Jun 05, 2026, 10:49 PM · 1d delay
Shares
100 sh
$900 per share
Estimated value
-$90.0k
Computed from shares × price
Holdings after
875k sh
Direct

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $10.0MLarge $100M
Cluster Selling Direct Ownership Repeat Seller 10b5-1 Detected
0score
Filing-only score

0

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

Neutral filing signal

This filing is broadly neutral on the filing-only scale. The Form 4 facts do not strongly tilt positive or negative.

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

    This transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 24, 2025.

Original filing · 0001836988-26-000013
Related transactions

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Same reporting owner
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