Transaction · 0001431531-26-000005

Griffith Joseph H. IV

Griffith Joseph H. IV, CFO, reported an open-market or private sale at 908 Devices Inc. involving 6940.000000 shares for an estimated $62668.20. Reported holdings after the transaction were 132956.000000 shares. The stored filing text includes a detected 10b5-1 reference.

Open-market sellSEC transaction code SCFO
MASS908 Devices Inc.
Filing timeMay 29
Trade dateMay 28, 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
$8.41
Pre-filing
1mo ago -19.9%1w ago -15.3%1d ago -3.0%
Returns since
7d -5.7%30d +4.3%90d +30.2%180d +30.2%1y +30.2%

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 2026-05-29Filed 99 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
0001431531-26-000005
Common Stock
Transaction date
May 28, 2026
Filed May 29, 2026, 08:15 PM · 1d delay
Shares
6.94k sh
$903 per share
Estimated value
-$6.26M
Computed from shares × price
Holdings after
132k sh
Direct

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $10.0MLarge $100M
Cluster Selling Direct Ownership Large Sale 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

Chief Financial Officer

Officer YesDirector No10% NoOther No
Footnotes & amended
  1. F1

    This transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 2, 2025.

Original filing · 0001431531-26-000005
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Same reporting owner
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