AWM Investment Company, Inc. 4

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

AI-generated summary of this filing

Updated Jun 4, 2026

908 Devices (MASS) 10% Owner AWM Investment Sells 42,282 Shares

What Happened

AWM Investment Company, Inc. (the investment adviser and 10% owner) disposed of 42,282 shares of 908 Devices common stock in two open-market sales. On 2026-06-02 it sold 2,500 shares at $8.95 ($22,375) and on 2026-06-04 it sold 39,782 shares at $8.97 ($356,856), for total proceeds of about $379,231. These were sales (dispositions), which are often routine portfolio/investment-manager transactions rather than a signal of insider bullishness.

Key Details

Transaction dates and prices:
- 2026-06-02: 2,500 shares @ $8.95 = $22,375
- 2026-06-04: 39,782 shares @ $8.97 = $356,856
- Footnote notes the prices are weighted-average prices.
Shares owned after transaction: According to the filing footnote, AWM reported sole voting and investment power over 4,887,491 shares across its managed funds; after these dispositions that holding is approximately 4,845,209 shares (4,887,491 − 42,282).
Notable footnotes:
- F2: AWM is the adviser to multiple funds (SSFQP, CAY, SSPE, TECH, TECH II) that collectively hold the shares.
- F3: David M. Greenhouse and Adam C. Stettner are AWM’s controlling principals; AWM disclaims beneficial ownership except to the extent of its pecuniary interest.
Filing timeliness: Report filed 2026-06-04 for transactions on 2026-06-02 and 2026-06-04 — no late-filing indication.

Context

This is institutional selling by an investment adviser of a 10% owner (not direct executive insider trading). Such dispositions commonly reflect fund rebalancing or other portfolio management activity rather than personal trading by company executives.

Form 4

Period: 2026-06-02

10% Owner

Transactions

Sale
908 DEVICES, INC.
[F1]
2026-06-02$8.95/sh−2,500$22,375→ 4,927,273 total(indirect: By Partnership)
Sale
908 DEVICES, INC.
[F1][F2][F3]
2026-06-04$8.97/sh−39,782$356,856→ 4,887,491 total(indirect: By Partnership)

Footnotes (3)

[F1]This is a weighted average price.
[F2]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 Private Equity Fund, L.P. (SSPE), Special Situations Technology Fund, L.P. (TECH) and Special Situations Technology Fund II, L.P. (TECH II and together with SSFQP, CAY, SSPE and TECH, the Funds). As the investment adviser to the Funds, AWM holds sole voting and investment power over 2,025,616 shares of Common Stock of the Issuer (the Shares) held by SSFQP, 578,813 Shares held by CAY, 267,602 Shares held by SSPE, 338,137 Shares held by TECH and 1,677,323 Shares held by TECH II.
[F3]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 pecuniary interest therein. This report shall not be deemed an admission that the reporting person is the beneficial owner of the securities reported herein for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose.

Signature

Adam Stettner|2026-06-04

1 file