908 Devices (MASS) stock: insider trades, news & valuation
Heavy selling
Close · Oct 9, 2026
$12.05
+4.3% on the day
+36.9% over 12 months
52-week range $5.09 – $12.80
Share price and insider trades
MASS closeInsider buyInsider sale
Bought, 12 months$0
Sold, 12 months$10.0M
Insiders buying0
Insiders selling6
908 Devices insider trading at a glance (Oct 9, 2026): in the past 12 months, 0 insiders bought $0 and 6 sold $10.0M of MASS stock on the open market.
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MASS insider buying and selling by quarter
Open-market purchases (green, above the line) and sales (red, below), by trade date.
| Quarter | Bought | Purchases | Sold | Sales |
|---|---|---|---|---|
| Q4 2026 | — | 0 | $422K | 2 |
| Q3 2026 | — | 0 | $4.3M | 22 |
| Q2 2026 | — | 0 | $4.9M | 31 |
| Q1 2026 | — | 0 | $358K | 4 |
| Q4 2025 | — | 0 | $45K | 2 |
Valuation, profit and volume
P/E (trailing)n/aSector median —
Market value—
Profit margin—Revenue growth —
Volume vs. 50-day0.9×Last 5 sessions
Insiders' paper profit—On all tracked purchases —
Summary
Over the past 12 months, 0 908 Devices Inc. insiders reported open-market purchases totaling $0, while 6 insiders reported sales totaling $10.0M. 39 of 61 recorded sales were made under pre-scheduled Rule 10b5-1 trading plans, which are usually less informative than discretionary sales.
Insider transactions
Open-market purchases and sales.
| Filed | Insider | Type | Shares | Price | Value | Since | Score |
|---|---|---|---|---|---|---|---|
| Oct 9 NewSEC | Christopher D. BrownDirector | Sell Plan | 30,000745,559 held (−4%) | $11.89 | $357K | +1.3% | — |
| Oct 8SEC | Joseph H. Griffith IVCFO | Sell Plan | 5,000116,497 held (−4%) | $13.03 | $65K | -7.5% | — |
| Oct 1SEC | Awm Investment Company, Inc.10% Owner | Sell | 18,0004,736,773 held (−0%) | $11.52 | $207K | +4.6% | — |
| Sep 25SEC | Awm Investment Company, Inc.10% Owner | Sell | 24,0004,754,773 held (−1%) | $11.36 | $273K | +6.1% | — |
| Sep 25SEC | Awm Investment Company, Inc.10% Owner | Sell | 1,0004,755,773 held (−0%) | $11.25 | $11K | +7.1% | — |
| Sep 17SEC | John KennewegSvp, Sales & Product Marketing | Sell Plan | 21,39957,784 held (−27%) | $10.11 | $216K | +19.2% | — |
| Sep 17SEC | John KennewegSvp, Sales & Product Marketing | Sell Plan | 5,25757,784 held (−8%) | $10.22 | $54K | +17.9% | — |
| Sep 17SEC | John KennewegSvp, Sales & Product Marketing | Sell Plan | 1,00057,784 held (−2%) | $10.00 | $10K | +20.5% | — |
| Sep 4SEC | Christopher D. BrownDirector | Sell Plan | 30,000775,559 held (−4%) | $10.58 | $317K | +13.9% | — |
| Aug 27SEC | Joseph H. Griffith IVCFO | Sell Plan | 11,459121,497 held (−9%) | $10.95 | $125K | +10.0% | — |
| Aug 24SEC | Awm Investment Company, Inc.10% Owner | Sell | 41,5784,779,773 held (−1%) | $10.61 | $441K | +13.6% | — |
| Aug 24SEC | Awm Investment Company, Inc.10% Owner | Sell | 8,4224,821,351 held (−0%) | $10.52 | $89K | +14.5% | — |
| Aug 17SEC | Kevin J. KnoppCEO, President | Sell Plan | 20,000555,968 held (−3%) | $10.35 | $207K | +16.4% | — |
| Aug 17SEC | Kevin J. KnoppCEO, President | Sell Plan | 7,622575,968 held (−1%) | $10.06 | $77K | +19.8% | — |
| Aug 12SEC | Kevin J. KnoppCEO, President | Sell Plan | 115,748616,507 held (−16%) | $9.83 | $1.1M | +22.6% | — |
| Aug 12SEC | Kevin J. KnoppCEO, President | Sell Plan | 30,170586,337 held (−5%) | $10.16 | $307K | +18.6% | — |
| Aug 12SEC | Christopher D. BrownDirector | Sell Plan | 9,442813,917 held (−1%) | $9.03 | $85K | +33.4% | — |
| Aug 12SEC | Christopher D. BrownDirector | Sell Plan | 8,358805,559 held (−1%) | $9.23 | $77K | +30.6% | — |
| Aug 12SEC | Kevin J. KnoppCEO, President | Sell Plan | 2,747583,590 held (−0%) | $10.07 | $28K | +19.7% | — |
| Aug 12SEC | Kevin J. KnoppCEO, President | Sell Plan | 348732,255 held (−0%) | $9.06 | $3K | +33.0% | — |
| Aug 7SEC | Christopher D. BrownDirector | Sell Plan | 20,000823,359 held (−2%) | $8.49 | $170K | +41.9% | — |
| Aug 6SEC | Awm Investment Company, Inc.10% Owner | Sell | 50,0004,829,773 held (−1%) | $8.36 | $418K | +44.1% | — |
| Jul 7SEC | Christopher D. BrownDirector | Sell Plan | 2,200843,359 held (−0%) | $9.02 | $20K | +33.6% | — |
| Jul 7SEC | Kevin J. KnoppCEO, President | Sell Plan | 222732,603 held (−0%) | $9.07 | $2K | +32.9% | — |
| Jul 2SEC | Christopher D. BrownDirector | Sell Plan | 20,000845,559 held (−2%) | $8.84 | $177K | +36.3% | — |
| Jun 30SEC | Kevin J. KnoppCEO, President | Sell Plan | 2,798732,825 held (−0%) | $9.09 | $25K | +32.6% | — |
| Jun 25SEC | Kevin J. KnoppCEO, President | Sell Plan | 40,535752,011 held (−5%) | $9.14 | $370K | +31.8% | — |
| Jun 25SEC | Kevin J. KnoppCEO, President | Sell Plan | 16,388735,623 held (−2%) | $9.10 | $149K | +32.4% | — |
| Jun 25SEC | Christopher D. BrownDirector | Sell Plan | 9,900865,559 held (−1%) | $9.04 | $89K | +33.3% | — |
| Jun 25SEC | Kevin J. KnoppCEO, President | Sell Plan | 3,422792,546 held (−0%) | $9.06 | $31K | +33.0% | — |
| Jun 24SEC | Awm Investment Company, Inc.10% Owner | Sell | 4,6684,882,823 held (−0%) | $8.99 | $42K | +34.0% | — |
| Jun 24SEC | Awm Investment Company, Inc.10% Owner | Sell | 3,0504,879,773 held (−0%) | $9.00 | $27K | +33.9% | — |
| Jun 5SEC | Christopher D. BrownDirector | Sell Plan | 100875,459 held (−0%) | $9.00 | $900 | +33.9% | — |
| Jun 4SEC | Awm Investment Company, Inc.10% Owner | Sell | 39,7824,887,491 held (−1%) | $8.97 | $357K | +34.3% | — |
| Jun 4SEC | Christopher D. BrownDirector | Sell Plan | 20,000875,559 held (−2%) | $8.73 | $175K | +38.0% | — |
| Jun 4SEC | Awm Investment Company, Inc.10% Owner | Sell | 2,5004,927,273 held (−0%) | $8.95 | $22K | +34.6% | — |
| May 29SEC | Awm Investment Company, Inc.10% Owner | Sell | 170,4424,929,773 held (−3%) | $8.66 | $1.5M | +39.1% | — |
| May 29SEC | Christopher D. BrownDirector | Sell Plan | 30,000895,559 held (−3%) | $9.00 | $270K | +33.9% | — |
| May 29SEC | Awm Investment Company, Inc.10% Owner | Sell | 15,0005,100,215 held (−0%) | $8.25 | $124K | +46.1% | — |
| May 29SEC | Joseph H. Griffith IVCFO | Sell Plan | 6,940132,956 held (−5%) | $9.03 | $63K | +33.4% | — |
| May 29SEC | Awm Investment Company, Inc.10% Owner | Sell | 1,5005,115,215 held (−0%) | $8.25 | $12K | +46.1% | — |
| May 13SEC | Awm Investment Company, Inc.10% Owner | Sell | 5,0005,116,715 held (−0%) | $8.25 | $41K | +46.1% | — |
| May 11SEC | John KennewegSvp, Sales & Product Marketing | Sell | 18,25557,784 held (−24%) | $8.11 | $148K | +48.6% | — |
| May 8SEC | Awm Investment Company, Inc.10% Owner | Sell | 57,3655,137,559 held (−1%) | $8.06 | $462K | +49.5% | — |
| May 8SEC | Awm Investment Company, Inc.10% Owner | Sell | 12,8195,124,740 held (−0%) | $8.20 | $105K | +47.0% | — |
| May 8SEC | Awm Investment Company, Inc.10% Owner | Sell | 5,0005,194,924 held (−0%) | $8.00 | $40K | +50.6% | — |
| May 8SEC | Awm Investment Company, Inc.10% Owner | Sell | 3,0255,121,715 held (−0%) | $8.20 | $25K | +47.0% | — |
| May 7SEC | Christopher D. BrownDirector | Sell Plan | 20,000925,559 held (−2%) | $7.23 | $145K | +66.7% | — |
| May 4SEC | John KennewegSvp, Sales & Product Marketing | Sell | 7,78776,039 held (−9%) | $6.83 | $53K | +76.4% | — |
| Apr 14SEC | Kevin J. MccallionSvp, Products And Production | Sell Plan | 2,69344,925 held (−6%) | $7.01 | $19K | +71.9% | — |
| Apr 10SEC | Kevin J. MccallionSvp, Products And Production | Sell Plan | 18,58044,925 held (−29%) | $7.05 | $131K | +70.9% | — |
| Apr 10SEC | Christopher D. BrownDirector | Sell Plan | 17,578945,559 held (−2%) | $7.07 | $124K | +70.4% | — |
| Apr 10SEC | Christopher D. BrownDirector | Sell Plan | 15,030970,529 held (−2%) | $7.05 | $106K | +70.9% | — |
| Apr 10SEC | Christopher D. BrownDirector | Sell Plan | 7,392963,137 held (−1%) | $7.04 | $52K | +71.2% | — |
| Apr 10SEC | Kevin J. MccallionSvp, Products And Production | Sell Plan | 5,42044,925 held (−11%) | $7.03 | $38K | +71.4% | — |
| Mar 5SEC | Kevin J. MccallionSvp, Products And Production | Sell Plan | 744,925 held (−0%) | $7.00 | $49 | +72.1% | — |
| Mar 4SEC | Kevin J. MccallionSvp, Products And Production | Sell Plan | 744,918 held (−0%) | $7.00 | $49 | +72.1% | — |
| Feb 3SEC | Kevin J. KnoppCEO, President | Sell | 34,764795,968 held (−4%) | $6.18 | $215K | +95.0% | — |
| Feb 3SEC | Joseph H. Griffith IVCFO | Sell | 23,175139,896 held (−14%) | $6.18 | $143K | +95.0% | — |
| Oct 6SEC | Joseph H. Griffith IVCFO | Sell Plan | 4,29292,930 held (−4%) | $9.05 | $39K | +33.1% | — |
| Oct 6SEC | Joseph H. Griffith IVCFO | Sell Plan | 70897,222 held (−1%) | $9.04 | $6K | +33.3% | — |
Insiders at 908 Devices Inc.
| Insider | Bought | Sold | Last filing | Score |
|---|---|---|---|---|
| Awm Investment Company, Inc.10% Owner | — | $4.2M | Oct 1, 2026 | — |
| Kevin J. KnoppCEO, President | — | $2.6M | Aug 17, 2026 | — |
| Christopher D. BrownDirector | — | $2.2M | Oct 9, 2026 | — |
| John KennewegSvp, Sales & Product Marketing | — | $481K | Sep 17, 2026 | — |
| Joseph H. Griffith IVCFO | — | $442K | Oct 8, 2026 | — |
| Kevin J. MccallionSvp, Products And Production | — | $188K | Apr 14, 2026 | — |
MASS stock: common questions
Are 908 Devices Inc. insiders buying MASS stock?
In the past 12 months, 0 insiders reported open-market purchases of MASS worth $0.
Are 908 Devices Inc. insiders selling MASS stock?
6 insiders reported sales worth $10.0M over the same period.
Where does this data come from?
Every transaction comes from Form 4 filings that insiders must submit to the SEC within two business days of a trade. We pull them from SEC EDGAR every night.
What is MASS's 52-week range?
Over the past year MASS has traded between $5.09 and $12.80. It last closed at $12.05 on Oct 9, 2026.