Transaction · 0001535264-26-000033

AWM Investment Company, Inc.

AWM Investment Company, Inc., 10%, reported an open-market or private sale at 908 Devices Inc. involving 170442.000000 shares for an estimated $1475925.45. Reported holdings after the transaction were 4929773.000000 shares. A 10b5-1 reference was not detected in the stored filing text.

Open-market sellSEC transaction code S10%
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
0001535264-26-000033
908 DEVICES, INC.
Transaction date
May 28, 2026
Filed May 29, 2026, 08:48 PM · 1d delay
Shares
170k sh
$866 per share
Estimated value
-$147M
Computed from shares × price
Holdings after
4.92M sh
Indirect · By Limited Partnership

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $10.0MLarge $100M
Cluster Selling Large Sale Repeat Seller
+4score
Filing-only score

+4

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 No10% YesOther No
Footnotes & amended
  1. F1

    This is a weighted average price

  2. F2

    David M. Greenhouse (Greenhouse) and Adam C. Stettner (Stettner) are the controlling principals of AWM. The reporting person disclaims beneficial ownership of the Shares, except to the extent of its p…

  3. F3

    AWM Investment Company, Inc., a Delaware Corporation (AWM), is the investment adviser to Special Situations Fund III QP, L.P. (SSFQP), Special Situations Cayman Fund, L.P. (CAY), Special Situations Pr…

Original filing · 0001535264-26-000033
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Same reporting owner
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