Kevin J Knopp

CEO · 908 Devices Inc.

Rank #5,807 SEC EDGAR (United States) ↗ Files from United States

Details

Officer and board memberIndustrial Machinery & EquipmentMASSSEC CIK 0001836523

Computed from SEC EDGAR filings and closing prices — not copied from any wealth ranking. Dataset . How we calculate this.

Disclosed holdings
$13.4M
1-day change
▲ 0.10%
Positions on file
1
issuers disclosed in Forms 3/4/5 and Schedules 13D/G

Disclosed holdings over time 53 weekly points

What the 1 currently disclosed position would have been worth at each week’s closing price. A rising line means the shares got more valuable, not that this person bought more.

How the line is built

Share counts are as last reported to the SEC and held constant; only prices move.

2025-09-05$6.8M – $14.3M2026-09-04

Insider activity Apr 16, 2024 – Feb 2, 2026

Kevin J Knopp is recorded in filings to the U.S. SEC via EDGAR as officer and board member, and reported 21 transactions between Apr 16, 2024 and Feb 2, 2026. The buy and sell totals below count only codes P, S.

Why the other codes are excluded

Share awards (A), shares withheld to pay tax (F), option exercises (M) and gifts (G) also appear in the table, but they are consequences of a pay package or a private transfer, not a decision to buy or sell on the open market. Counting them would turn this into a compensation ranking.

Open-market buys (code P)
$424.8K
7 purchases on file priced rows only
Open-market sales (code S)
$252.0K
4 sales on file priced rows only
All reported transactions
21
every code, including awards and exercises
Pattern
Net seller in the final 12 months of the window
last 12 months of the window

Events from filings

Detected automatically in the filings linked below. Each headline is built from the numbers in those filings, not written by a model. Newest first; events older than 45 days stay listed and are marked as older.

Kevin J Knopp sold 115,748 908 Devices Inc. (MASS) shares for $1,137,803 on Aug 11, 2026

Large trade for this person

Flagged because this trade was large compared with this person’s own earlier open-market trades in the same currency — not because it is large in absolute terms. A trade that is routine for one insider can be flagged for another.

Kevin J Knopp sold 115,748 908 Devices Inc. (MASS) shares for $1,137,803 on Aug 11, 2026
Date Insider Transaction Shares Price Value Filing
Aug 11, 2026 Kevin J Knopp S Open-market sale 115,748 held after: 616,507 $9.83 $1,137,803 SEC filing ↗

Source: SEC EDGAR (United States); every row links to where it was published. Event computed Sep 14, 2026.

Kevin J Knopp sold 40,535 908 Devices Inc. (MASS) shares for $370,490 on Jun 24, 2026

Large trade for this person

Flagged because this trade was large compared with this person’s own earlier open-market trades in the same currency — not because it is large in absolute terms. A trade that is routine for one insider can be flagged for another.

Kevin J Knopp sold 40,535 908 Devices Inc. (MASS) shares for $370,490 on Jun 24, 2026
Date Insider Transaction Shares Price Value Filing
Jun 24, 2026 Kevin J Knopp S Open-market sale 40,535 held after: 752,011 $9.14 $370,490 SEC filing ↗

Source: SEC EDGAR (United States); every row links to where it was published. Event computed Sep 14, 2026.

Reported transactions

Price 0.00 is a real reported figure on gifts (G) and share awards (A) — not a missing number. The 25 most recent rows are grouped into 17 lines by date, company and transaction type — open a line to see every lot with its own source link. We hold 32 on file in total. See the full history on EDGAR ↗

How to read this list

Every row is one line of one Form 4 or Form 5, with the filing it came from. Where the record carries no price at all we leave the cell empty instead of guessing one.

The shares and money on a grouped line add up only the lots listed inside that line, and only when every one of them carries the figure. Where a group mixes more than one reporting currency we leave the money blank rather than convert — no source publishes the rate that conversion would need.

  1. 908 Devices Inc. MASS S Open-market sale 20,000 shares $207.0K at $10.35 SEC filing ↗
  2. 908 Devices Inc. MASS S Open-market sale 7,622 shares $76.7K at $10.06 SEC filing ↗
  3. 908 Devices Inc. MASS S Open-market sale 2,747 shares $27.7K at $10.07 SEC filing ↗
  4. 908 Devices Inc. MASS S Open-market sale × 2 145,918 shares $1.44M
    The 2 lots that make up this line, each with the source behind it.
    Shares Price Value Filing
    30,170 $10.16 $306.5K SEC filing ↗
    115,748 $9.83 $1.14M SEC filing ↗
  5. 908 Devices Inc. MASS S Open-market sale 348 shares $3.2K at $9.06 SEC filing ↗
  6. 908 Devices Inc. MASS S Open-market sale 222 shares $2.0K at $9.07 SEC filing ↗
  7. 908 Devices Inc. MASS S Open-market sale 2,798 shares $25.4K at $9.09 SEC filing ↗
  8. 908 Devices Inc. MASS S Open-market sale 16,388 shares $149.1K at $9.10 SEC filing ↗
  9. 908 Devices Inc. MASS S Open-market sale 40,535 shares $370.5K at $9.14 SEC filing ↗
  10. 908 Devices Inc. MASS S Open-market sale 3,422 shares $31.0K at $9.06 SEC filing ↗
  11. 908 Devices Inc. MASS S Open-market sale 34,764 shares $214.8K at $6.18 SEC filing ↗
  12. 908 Devices Inc. MASS M Option exercise or conversion × 4not a buy/sell decisionreported at zero 107,999 shares $0
    The 4 lots that make up this line, each with the source behind it.
    Shares Price Value Filing
    11,255 $0.00reported at zero $0 SEC filing ↗
    13,449 $0.00reported at zero $0 SEC filing ↗
    17,007 $0.00reported at zero $0 SEC filing ↗
    66,288 $0.00reported at zero $0 SEC filing ↗
  13. 908 Devices Inc. MASS P Open-market purchase 15,000 shares $66.6K at $4.44 SEC filing ↗
  14. 908 Devices Inc. MASS P Open-market purchase 15,000 shares $64.8K at $4.32 SEC filing ↗
  15. 908 Devices Inc. MASS S Open-market sale × 3 16,001 shares $37.1K
    The 3 lots that make up this line, each with the source behind it.
    Shares Price Value Filing
    4,318 $2.33 $10.1K SEC filing ↗
    5,159 $2.31 $11.9K SEC filing ↗
    6,524 $2.32 $15.1K SEC filing ↗
  16. 908 Devices Inc. MASS M Option exercise or conversion × 3not a buy/sell decisionreported at zero 41,709 shares $0
    The 3 lots that make up this line, each with the source behind it.
    Shares Price Value Filing
    17,007 $0.00reported at zero $0 SEC filing ↗
    11,254 $0.00reported at zero $0 SEC filing ↗
    13,448 $0.00reported at zero $0 SEC filing ↗
  17. 908 Devices Inc. MASS M Option exercise or conversionnot a buy/sell decision 110,626 shares $174.8K at $1.58 SEC filing ↗

Disclosed holdings

Shares is the amount on the form; value is that amount times the closing price shown. Rows with no closing price are left blank, so they may add up to less than the headline figure.

What is not counted here

Each row is one filing you can open. Private companies, real estate, bonds and crypto are not in SEC insider filings and are therefore not counted here.

Equity positions disclosed to the SEC, with the source filing behind each row.
Issuer Ticker Security Shares Close Value Form Reported Filing
908 Devices Inc. MASS Common Stock 1,337,191 $10.05 $13.4M 4 EDGAR ↗

Other insiders at the same companies

People who also file with the SEC at a company where Kevin J Knopp reports shares.

Sharing a filing does not mean they work together day to day — it means both names appear on the same issuer’s insider record.

Sources

The filings linked in the tables above are the sources for every figure on this page.

Think a number here is wrong? Open the linked filing and compare — how to report it.

Profile record last refreshed Sep 8, 2026.