Transaction · 0001836523-26-000013
MASS908 Devices Inc.
Knopp Kevin J.
Knopp Kevin J., PRES, reported an open-market or private sale at 908 Devices Inc. involving 7622.000000 shares for an estimated $76677.32. Reported holdings after the transaction were 575968.000000 shares. The stored filing text includes a detected 10b5-1 reference.
Open-market sellSEC transaction code SPRES
- Trade date
- Aug 13, 2026
- Filing date
- Aug 17, 2026
How reported position traded is calculated
Shares sold ÷ (holdings after + shares sold). Estimated position before: 583,590 shares.
Row-level estimate for this security and ownership context, not the insider’s complete portfolio. Joint ownership, other transactions in the filing, amendments and footnotes can affect interpretation.
MASS price since this filing
Daily closing prices, with the filing date and available return windowsMASS · Daily closing priceLoading daily prices…
Filing dateReturn windows appear as prices become available.
Pre-filing1mo ago -19.9%1w ago -18.5%1d ago -1.7%
Returns since7d +7.2%30d -2.6%90d180d1y
Transaction facts
Stored Form 4 columns with their raw values
- Type
- Sell Code S
- Identifier
- 0001836523-26-000013 Common Stock
- Transaction date
- Aug 13, 2026 Filed Aug 17, 2026, 09:30 PM · 4d delay
- Shares
- 7,622 sh $10.06 per share
- Estimated value
- -$76.6k Computed from shares × price
- Holdings after
- 575,968 sh Direct
Filing signal explanations
Badges describe filing facts only — not predictions.
Cluster 14dRepeat 30dPattern $100kLarge $1.00M
Direct Ownership 10b5-1 Detected
Filing-only score
-4 points
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.
How this score is calculated
- direct_ownership+6 points
direct_or_indirect_ownership = D
Direct ownership reports the insider's personal stake. - tenb5_1_detected-10 points
is_10b5_1 = true
Stored filing content includes detected 10b5-1 language.
Signed filing-only points, not a probability or expected return. Version v1.
Reported relationships & other filings
Form 4 relationship flags and nearby filing context
Reported roles
President and CEO
Officer YesDirector Yes10% NoOther No
Footnotes & amended
- F1
This transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 20, 2025.
- 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…
- 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…
- 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…
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