Transaction · 0001836523-26-000013

Knopp Kevin J.

Knopp Kevin J., PRES, reported an open-market or private sale at 908 Devices Inc. involving 20000.000000 shares for an estimated $207000.00. Reported holdings after the transaction were 555968.000000 shares. The stored filing text includes a detected 10b5-1 reference.

Open-market sellSEC transaction code SPRES
MASS908 Devices Inc.
Filing timeAug 17
Trade dateAug 17, 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
$10.19
Pre-filing
1mo ago -27.9%1w ago -13.6%1d ago -1.8%
Returns since
7d +7.2%30d +4.5%90d +4.5%180d +4.5%1y +4.5%

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 2026-08-17Filed 19 days ago · 30 days of pre-filing context shaded
Loading…
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
0001836523-26-000013
Common Stock
Transaction date
Aug 17, 2026
Filed Aug 17, 2026, 09:30 PM · 0d delay
Shares
20.0k sh
$1.03k per share
Estimated value
-$20.7M
Computed from shares × price
Holdings after
555k sh
Direct

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $10.0MLarge $100M
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

President and CEO

Officer YesDirector 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 May 20, 2025.

  2. F2

    The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $10.05 to $10.12 inclusive. The Reporting Person undertakes to provide to the Iss…

  3. F3

    The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $10.08 to $10.45 inclusive. The Reporting Person undertakes to provide to the Iss…

  4. F4

    The shares are owned directly by The Kevin J. Knopp Irrevocable Trust of 2018. The reporting person's brother-in-law is the trustee of The Kevin J. Knopp Irrevocable Trust of 2018 and has sole voting…

Original filing · 0001836523-26-000013
Related transactions

0 other filings

Same reporting owner
Recent company activity

0 recent txs

MASS