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sellWeak cluster of 4

Christopher D. Brown sold $18k of MASS

Chief Product Officer at 908 Devices Inc.. 7,767 shares at an average of $2.34, traded Feb 3, 2025, filed Feb 4, 2025.

Warning score
15
Value
$18k
7,767 shares
Holdings after
962,122
-1% from before
From 52-week low
-
no price yet
From 52-week high
-
no price yet

Score components

  • Role
    Officer
    +15
  • Trade size
    $18k at market
    0
  • Share of holdings sold
    Sold 0.8% of holdings
    0
  • Cluster
    4 insiders selling within 14 days
    +15
  • Exercise and sell
    Shares came from an option exercise in the same filing
    -15

What happened after comparable sells

Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.

This signal so far: 1m +27.0%, 3m +124.1%, 6m +167.5%.

Price around the trade, and since

From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.

MASSOct 9, 2026 · close 12.05
Since filing Feb 4, 2025: +408.4%SPY +31.9% · excess +376.5%

Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™

Rows in this filing

Every transaction in Form 4 0001562180-25-000891, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Feb 1, 2025MOption exercise
Common Stock
+5,027--951,480Feb 4, 2025
Feb 1, 2025MOption exercise
Common Stock
+7,418--958,898Feb 4, 2025
Feb 1, 2025MOption exercise
Common Stock
+10,991--969,889Feb 4, 2025
Feb 3, 2025SOpen-market sale
Common Stock
-1,667$2.36$3,926968,222Feb 4, 2025
Feb 3, 2025SOpen-market sale
Common Stock
-2,459$2.34$5,763965,763Feb 4, 2025
Feb 3, 2025SOpen-market sale
Common Stock
-3,641$2.33$8,501962,122Feb 4, 2025
Feb 1, 2025MOption exercise
Restricted Stock Unitsderivative
-5,027$0.00$05,027Feb 4, 2025
Feb 1, 2025MOption exercise
Restricted Stock Unitsderivative
-7,418$0.00$014,836Feb 4, 2025
Feb 1, 2025MOption exercise
Restricted Stock Unitsderivative
-10,991$0.00$032,974Feb 4, 2025

Related signals

Other insiders at 908 Devices Inc. and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
10Weak
MASSsell 310b5-1
908 Devices Inc.
Christopher D. Brown
Chief Product Officer
$357k
30,000 shares
-4%
25Weak
MASSsell 310b5-1
908 Devices Inc.
Joseph H. Griffith IV
Chief Financial Officer
$65k
5,000 shares
-4%
39Weak
MASSsell 4
908 Devices Inc.
AWM Investment Company, Inc.
owner
$207k
18,000 shares
-0%
41Moderate
MASSsell 4
908 Devices Inc.
AWM Investment Company, Inc.
owner
$284k
25,000 shares
-1%
19Weak
MASSsell 310b5-1
908 Devices Inc.
John Kenneweg
SVP, Sales & Product Marketing
$280k
27,656 shares
-47%
24Weak
MASSsell 410b5-1
908 Devices Inc.
Christopher D. Brown
Chief Product Officer
$317k
30,000 shares
-4%
28Weak
MASSsell 410b5-1
908 Devices Inc.
Joseph H. Griffith IV
Chief Financial Officer
$125k
11,459 shares
-9%
45Moderate
MASSsell 4
908 Devices Inc.
AWM Investment Company, Inc.
owner
$530k
50,000 shares
-1%
34Weak
MASSsell 410b5-1
908 Devices Inc.
Kevin J. Knopp
President and CEO
$284k
27,622 shares
-5%
50Moderate
MASSsell 310b5-1
908 Devices Inc.
Kevin J. Knopp
President and CEO
$1.5M
149,013 shares
-20%

Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.

Christopher D. Brown sold $18k of MASS | InsiderTell