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Nasdaq · CIK 0001555279

MASS 908 Devices Inc.

Insider trading from SEC Form 4. Last filing 3 d ago. Close $12.05 on Oct 9, 2026, +137% from the 52-week low and -6% from the high.

Last 90 days

Net insider value
-$1.5M
more sold than bought
Buys
0
$0 by 0 insiders
Sells
6
$1.5M by 4 insiders
Insiders on file
15
with a Form 4 at this company

Price and insider trades, last year

MASSOct 9, 2026 · close 12.05

Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™

Signals

Open-market buys and sells at 908 Devices Inc., scored.

ScoreInsiderValueHoldingsPrice contextFiled
10WeakChristopher D. Brown
Chief Product Officer
sell
$357k
30,000 shares
-4%+131% from low-8% from high
25WeakJoseph H. Griffith IV
Chief Financial Officer
sell
$65k
5,000 shares
-4%+142% from low-4% from high
39WeakAWM Investment Company, Inc.
owner
sell
$207k
18,000 shares
-0%+133% from low0% from high
41ModerateAWM Investment Company, Inc.
owner
sell
$284k
25,000 shares
-1%+115% from low-2% from high
19WeakJohn Kenneweg
SVP, Sales & Product Marketing
sell
$280k
27,656 shares
-47%+96% from low-10% from high
17WeakChristopher D. Brown
Chief Product Officer
sell
$317k
30,000 shares
-4%-
8WeakJoseph H. Griffith IV
Chief Financial Officer
sell
$35k
5,000 shares
-5%+288% from low-8% from high
35WeakMichael S. Turner
Chief Legal & Admin Officer
sell
$185k
24,603 shares
-100%+282% from low-2% from high
17WeakJoseph H. Griffith IV
Chief Financial Officer
sell
$49k
6,940 shares
-6%+267% from low0% from high
50ModerateKevin J. Knopp
President and CEO
buy
$67k
15,000 shares
+2%+140% from low-22% from high
36WeakMark Spoto
director
buy
$43k
10,000 shares
+19%+130% from low-25% from high
45ModerateKevin J. Knopp
President and CEO
buy
$65k
15,000 shares
+2%+130% from low-25% from high
15WeakChristopher D. Brown
Chief Product Officer
sell
$18k
7,767 shares
-1%-
31WeakKevin J. Knopp
President and CEO
sell
$37k
16,001 shares
-2%-
25WeakMichael S. Turner
Chief Legal & Admin Officer
sell
$22k
9,672 shares
-28%-
22WeakJoseph H. Griffith IV
Chief Financial Officer
sell
$24k
10,236 shares
-9%-

Transactions

The last 100 rows filed, every code.

DateInsiderTransactionSharesPriceValueHoldings afterFiled
Oct 7, 2026Christopher D. Brown
Chief Product Officer
SOpen-market sale
Common Stock10b5-1
-30,000$11.89$357k745,5593 d ago
Oct 7, 2026Christopher D. Brown
Chief Product Officer
MOption exercise
Common Stock10b5-1
+60,000$1.75$105k805,5593 d ago
Oct 7, 2026Christopher D. Brown
Chief Product Officer
MOption exercise
Stock Option (option to buy)derivative10b5-1
-60,000$0.00$054,3183 d ago
Oct 6, 2026Joseph H. Griffith IV
Chief Financial Officer
SOpen-market sale
Common Stock10b5-1
-5,000$13.03$65k116,4974 d ago
Sep 29, 2026AWM Investment Company, Inc.
owner
SOpen-market sale
Common Stockindirect: By Limited Partnership
-18,000$11.52$207k4,736,77311 d ago
Sep 23, 2026AWM Investment Company, Inc.
owner
SOpen-market sale
Common Stockindirect: By Limited Partnershp
-1,000$11.25$11k4,755,77317 d ago
Sep 24, 2026AWM Investment Company, Inc.
owner
SOpen-market sale
Common Stockindirect: By Limited Partnership
-24,000$11.36$273k4,754,77317 d ago
Sep 15, 2026John Kenneweg
SVP, Sales & Product Marketing
MOption exercise
Common Stock10b5-1
+1,000$0.96$96058,78425 d ago
Sep 15, 2026John Kenneweg
SVP, Sales & Product Marketing
SOpen-market sale
Common Stock10b5-1
-1,000$10.00$10k57,78425 d ago
Sep 16, 2026John Kenneweg
SVP, Sales & Product Marketing
MOption exercise
Common Stock10b5-1
+21,399$0.96$21k79,18325 d ago
Sep 16, 2026John Kenneweg
SVP, Sales & Product Marketing
SOpen-market sale
Common Stock10b5-1
-21,399$10.11$216k57,78425 d ago
Sep 17, 2026John Kenneweg
SVP, Sales & Product Marketing
MOption exercise
Common Stock10b5-1
+5,257$0.96$5,04763,04125 d ago
Sep 17, 2026John Kenneweg
SVP, Sales & Product Marketing
SOpen-market sale
Common Stock10b5-1
-5,257$10.22$54k57,78425 d ago
Sep 15, 2026John Kenneweg
SVP, Sales & Product Marketing
MOption exercise
Stock Option (right to buy)derivative10b5-1
-1,000$0.00$026,65625 d ago
Sep 16, 2026John Kenneweg
SVP, Sales & Product Marketing
MOption exercise
Stock Option (right to buy)derivative10b5-1
-21,399$0.00$05,25725 d ago
Sep 17, 2026John Kenneweg
SVP, Sales & Product Marketing
MOption exercise
Stock Option (right to buy)derivative10b5-1
-5,257$0.00$0025 d ago
Sep 2, 2026Christopher D. Brown
Chief Product Officer
SOpen-market sale
Common Stock10b5-1
-30,000$10.58$317k775,55938 d ago
Sep 19, 2025Joseph H. Griffith IV
Chief Financial Officer
SOpen-market sale
Common Stock10b5-1
-5,000$7.07$35k97,930Sep 23, 2025
Aug 1, 2025Brandi C Vann
director
AGrant or award
Restricted Stock Unitderivative
+15,577$0.00$015,577Aug 18, 2025
Aug 1, 2025Brandi C Vann
director
AGrant or award
Stock Option (option to buy)derivative
+20,409$0.00$020,409Aug 18, 2025
Jun 25, 2025Michele M. Leonhart
director
MOption exercise
Common Stock
+6,485--6,485Jun 27, 2025
Jun 25, 2025Michele M. Leonhart
director
MOption exercise
Restricted Stock Unitsderivative
-6,485$0.00$012,971Jun 27, 2025
Jun 16, 2025Michael S. Turner
Chief Legal & Admin Officer
SOpen-market sale
Common Stock10b5-1
-16,082$7.51$121k8,521Jun 18, 2025
Jun 17, 2025Michael S. Turner
Chief Legal & Admin Officer
SOpen-market sale
Common Stock10b5-1
-7,148$7.51$54k1,373Jun 18, 2025
Jun 18, 2025Michael S. Turner
Chief Legal & Admin Officer
SOpen-market sale
Common Stock10b5-1
-1,373$7.50$10k0Jun 18, 2025
Jun 11, 2025Jeffrey P. George
director
MOption exercise
Common Stock
+11,364--26,814Jun 13, 2025
Jun 11, 2025Mark Spoto
director
MOption exercise
Common Stock
+11,364--74,335Jun 13, 2025
Jun 12, 2025Michele M. Leonhart
director
AGrant or award
Restricted Stock Unitsderivative
+14,083$0.00$014,083Jun 13, 2025
Jun 11, 2025Keith Crandell
director, owner
MOption exercise
Common Stock
+11,364--25,291Jun 13, 2025
Jun 11, 2025Fenel M Eloi
director
MOption exercise
Common Stock
+11,364--26,814Jun 13, 2025
Jun 11, 2025Marcia Eisenberg
director
MOption exercise
Common Stock
+11,364--25,957Jun 13, 2025
Jun 11, 2025E Kevin Hrusovsky
director
MOption exercise
Common Stock
+11,364--151,307Jun 13, 2025
Jun 11, 2025Anthony Hunt
director
MOption exercise
Common Stock
+11,364--30,085Jun 13, 2025
Jun 12, 2025Michele M. Leonhart
director
AGrant or award
Stock Option (option to buy)derivative
+6,516$0.00$06,516Jun 13, 2025
Jun 11, 2025Marcia Eisenberg
director
MOption exercise
Restricted Stock Unitsderivative
-11,364$0.00$00Jun 13, 2025
Jun 11, 2025Fenel M Eloi
director
MOption exercise
Restricted Stock Unitsderivative
-11,364$0.00$00Jun 13, 2025
Jun 11, 2025Jeffrey P. George
director
MOption exercise
Restricted Stock Unitsderivative
-11,364$0.00$00Jun 13, 2025
Jun 11, 2025Anthony Hunt
director
MOption exercise
Restricted Stock Unitsderivative
-11,364$0.00$00Jun 13, 2025
Jun 12, 2025Jeffrey P. George
director
AGrant or award
Restricted Stock Unitsderivative
+14,083$0.00$014,083Jun 13, 2025
Jun 12, 2025Anthony Hunt
director
AGrant or award
Restricted Stock Unitsderivative
+14,083$0.00$014,083Jun 13, 2025
Jun 11, 2025Mark Spoto
director
MOption exercise
Restricted Stock Unitsderivative
-11,364$0.00$00Jun 13, 2025
Jun 11, 2025Keith Crandell
director, owner
MOption exercise
Restricted Stock Unitsderivative
-11,364$0.00$00Jun 13, 2025
Jun 11, 2025E Kevin Hrusovsky
director
MOption exercise
Restricted Stock Unitsderivative
-11,364$0.00$00Jun 13, 2025
Jun 12, 2025Fenel M Eloi
director
AGrant or award
Restricted Stock Unitsderivative
+14,083$0.00$014,083Jun 13, 2025
Jun 12, 2025Jeffrey P. George
director
AGrant or award
Stock Option (option to buy)derivative
+6,516$0.00$06,516Jun 13, 2025
Jun 12, 2025Anthony Hunt
director
AGrant or award
Stock Option (option to buy)derivative
+6,516$0.00$06,516Jun 13, 2025
Jun 12, 2025E Kevin Hrusovsky
director
AGrant or award
Restricted Stock Unitsderivative
+14,083$0.00$014,083Jun 13, 2025
Jun 12, 2025Mark Spoto
director
AGrant or award
Restricted Stock Unitsderivative
+14,083$0.00$014,083Jun 13, 2025
Jun 12, 2025Keith Crandell
director, owner
AGrant or award
Restricted Stock Unitsderivative
+14,083$0.00$014,083Jun 13, 2025
Jun 12, 2025Fenel M Eloi
director
AGrant or award
Stock Option (option to buy)derivative
+6,516$0.00$06,516Jun 13, 2025
Jun 12, 2025E Kevin Hrusovsky
director
AGrant or award
Stock Option (option to buy)derivative
+6,516$0.00$06,516Jun 13, 2025
Jun 12, 2025Mark Spoto
director
AGrant or award
Stock Option (option to buy)derivative
+6,516$0.00$06,516Jun 13, 2025
Jun 12, 2025Keith Crandell
director, owner
AGrant or award
Stock Option (option to buy)derivative
+6,516$0.00$06,516Jun 13, 2025
Jun 4, 2025Joseph H. Griffith IV
Chief Financial Officer
SOpen-market sale
Common Stock10b5-1
-6,940$7.08$49k102,930Jun 6, 2025
May 15, 2025Kevin J. Knopp
President and CEO
POpen-market purchase
Common Stock
+15,000$4.44$67k722,733May 19, 2025
May 14, 2025Mark Spoto
director
POpen-market purchase
Common Stock
+7,000$4.30$30k59,971May 15, 2025
May 14, 2025Mark Spoto
director
POpen-market purchase
Common Stock
+3,000$4.25$13k62,971May 15, 2025
May 14, 2025Kevin J. Knopp
President and CEO
POpen-market purchase
Common Stock
+15,000$4.32$65k707,733May 14, 2025
Mar 3, 2025Michael S. Turner
Chief Legal & Admin Officer
AGrant or award
Stock Option (option to buy)derivative
+57,111$0.00$057,111Mar 5, 2025
Mar 3, 2025Joseph H. Griffith IV
Chief Financial Officer
AGrant or award
Stock Option (option to buy)derivative
+59,362$0.00$059,362Mar 5, 2025
Mar 3, 2025Kevin J. Knopp
President and CEO
AGrant or award
Stock Option (option to buy)derivative
+90,518$0.00$090,518Mar 5, 2025
Mar 3, 2025Kevin J. Knopp
President and CEO
AGrant or award
Restricted Stock Unitsderivative
+198,864$0.00$0198,864Mar 5, 2025
Mar 3, 2025Michael S. Turner
Chief Legal & Admin Officer
AGrant or award
Restricted Stock Unitsderivative
+125,470$0.00$0125,470Mar 5, 2025
Mar 3, 2025Joseph H. Griffith IV
Chief Financial Officer
AGrant or award
Restricted Stock Unitsderivative
+130,418$0.00$0130,418Mar 5, 2025
Mar 2, 2025Anthony Hunt
director
MOption exercise
Common Stock
+2,058--18,721Mar 4, 2025
Mar 2, 2025Anthony Hunt
director
MOption exercise
Restricted Stock Unitsderivative
-2,058$0.00$00Mar 4, 2025
Feb 1, 2025Christopher D. Brown
Chief Product Officer
MOption exercise
Common Stock
+5,027--951,480Feb 4, 2025
Feb 1, 2025Kevin J. Knopp
President and CEO
MOption exercise
Common Stock
+11,254--678,279Feb 4, 2025
Feb 1, 2025Michael S. Turner
Chief Legal & Admin Officer
MOption exercise
Common Stock
+4,427--13,532Feb 4, 2025
Feb 1, 2025Joseph H. Griffith IV
Chief Financial Officer
MOption exercise
Common Stock
+5,102--98,539Feb 4, 2025
Feb 1, 2025Christopher D. Brown
Chief Product Officer
MOption exercise
Common Stock
+7,418--958,898Feb 4, 2025
Feb 1, 2025Kevin J. Knopp
President and CEO
MOption exercise
Common Stock
+13,448--691,727Feb 4, 2025
Feb 1, 2025Michael S. Turner
Chief Legal & Admin Officer
MOption exercise
Common Stock
+9,909--23,441Feb 4, 2025
Feb 1, 2025Joseph H. Griffith IV
Chief Financial Officer
MOption exercise
Common Stock
+10,306--108,845Feb 4, 2025
Feb 1, 2025Christopher D. Brown
Chief Product Officer
MOption exercise
Common Stock
+10,991--969,889Feb 4, 2025
Feb 1, 2025Kevin J. Knopp
President and CEO
MOption exercise
Common Stock
+17,007--708,734Feb 4, 2025
Feb 1, 2025Michael S. Turner
Chief Legal & Admin Officer
MOption exercise
Common Stock
+10,834--34,275Feb 4, 2025
Feb 1, 2025Joseph H. Griffith IV
Chief Financial Officer
MOption exercise
Common Stock
+11,261--120,106Feb 4, 2025
Feb 3, 2025Christopher D. Brown
Chief Product Officer
SOpen-market sale
Common Stock
-1,667$2.36$3,926968,222Feb 4, 2025
Feb 3, 2025Kevin J. Knopp
President and CEO
SOpen-market sale
Common Stock
-4,318$2.33$10k704,416Feb 4, 2025
Feb 3, 2025Michael S. Turner
Chief Legal & Admin Officer
SOpen-market sale
Common Stock
-1,703$2.36$4,01432,572Feb 4, 2025
Feb 3, 2025Joseph H. Griffith IV
Chief Financial Officer
SOpen-market sale
Common Stock
-1,960$2.34$4,582118,146Feb 4, 2025
Feb 3, 2025Christopher D. Brown
Chief Product Officer
SOpen-market sale
Common Stock
-2,459$2.34$5,763965,763Feb 4, 2025
Feb 3, 2025Kevin J. Knopp
President and CEO
SOpen-market sale
Common Stock
-5,159$2.31$12k699,257Feb 4, 2025
Feb 3, 2025Michael S. Turner
Chief Legal & Admin Officer
SOpen-market sale
Common Stock
-3,807$2.32$8,83128,765Feb 4, 2025
Feb 3, 2025Joseph H. Griffith IV
Chief Financial Officer
SOpen-market sale
Common Stock
-3,955$2.34$9,235114,191Feb 4, 2025
Feb 3, 2025Christopher D. Brown
Chief Product Officer
SOpen-market sale
Common Stock
-3,641$2.33$8,501962,122Feb 4, 2025
Feb 3, 2025Kevin J. Knopp
President and CEO
SOpen-market sale
Common Stock
-6,524$2.32$15k692,733Feb 4, 2025
Feb 3, 2025Michael S. Turner
Chief Legal & Admin Officer
SOpen-market sale
Common Stock
-4,162$2.32$9,65424,603Feb 4, 2025
Feb 3, 2025Joseph H. Griffith IV
Chief Financial Officer
SOpen-market sale
Common Stock
-4,321$2.35$10k109,870Feb 4, 2025
Feb 1, 2025Christopher D. Brown
Chief Product Officer
MOption exercise
Restricted Stock Unitsderivative
-5,027$0.00$05,027Feb 4, 2025
Feb 1, 2025Michael S. Turner
Chief Legal & Admin Officer
MOption exercise
Restricted Stock Unitsderivative
-4,427$0.00$04,427Feb 4, 2025
Feb 1, 2025Joseph H. Griffith IV
Chief Financial Officer
MOption exercise
Restricted Stock Unitsderivative
-5,102$0.00$05,102Feb 4, 2025
Feb 1, 2025Christopher D. Brown
Chief Product Officer
MOption exercise
Restricted Stock Unitsderivative
-7,418$0.00$014,836Feb 4, 2025
Feb 1, 2025Kevin J. Knopp
President and CEO
MOption exercise
Restricted Stock Unitsderivative
-11,254$0.00$011,255Feb 4, 2025
Feb 1, 2025Michael S. Turner
Chief Legal & Admin Officer
MOption exercise
Restricted Stock Unitsderivative
-9,909$0.00$019,819Feb 4, 2025
Feb 1, 2025Joseph H. Griffith IV
Chief Financial Officer
MOption exercise
Restricted Stock Unitsderivative
-10,306$0.00$020,612Feb 4, 2025
Feb 1, 2025Christopher D. Brown
Chief Product Officer
MOption exercise
Restricted Stock Unitsderivative
-10,991$0.00$032,974Feb 4, 2025
Feb 1, 2025Kevin J. Knopp
President and CEO
MOption exercise
Restricted Stock Unitsderivative
-13,448$0.00$026,897Feb 4, 2025
Feb 1, 2025Michael S. Turner
Chief Legal & Admin Officer
MOption exercise
Restricted Stock Unitsderivative
-10,834$0.00$032,500Feb 4, 2025

Insiders

Everyone who has filed a Form 4 here.

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.

MASS insider trading: 908 Devices Inc. | InsiderTell