MASS
908 Devices Inc
NASDAQ: MASS · HEALTHCARE · MEDICAL DEVICES
$12.87
+4.13% today
Updated 2026-10-28
Market cap
$474.92M
P/E ratio
—
P/S ratio
7.81x
EPS (TTM)
$-0.94
Dividend yield
—
52W range
$5 – $13
Volume
0.4M
908 Devices Inc (MASS) Insider transactions
Net insider activity
Net selling (126,923 shares)
Buy transactions
35
Sell transactions
65
All transactions
| Date | Insider | Title | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-09-24 | AWM, INVESTMENT COMPANY, INC. | 10% Owner | Sale | 24,000 | $11.36 | $272625.60 |
| 2026-09-23 | AWM, INVESTMENT COMPANY, INC. | 10% Owner | Sale | 1,000 | $11.25 | $11250.00 |
| 2026-09-17 | KENNEWEG, JOHN | SVP, Sales & Product Marketing | Sale | 5,257 | — | — |
| 2026-09-17 | KENNEWEG, JOHN | SVP, Sales & Product Marketing | Buy | 5,257 | $0.96 | $5046.72 |
| 2026-09-16 | KENNEWEG, JOHN | SVP, Sales & Product Marketing | Sale | 21,399 | — | — |
| 2026-09-16 | KENNEWEG, JOHN | SVP, Sales & Product Marketing | Sale | 21,399 | $10.11 | $216343.89 |
| 2026-09-15 | KENNEWEG, JOHN | SVP, Sales & Product Marketing | Sale | 1,000 | — | — |
| 2026-09-15 | KENNEWEG, JOHN | SVP, Sales & Product Marketing | Sale | 1,000 | $10.00 | $10000.00 |
| 2026-09-02 | BROWN, CHRISTOPHER D. | Director | Sale | 30,000 | $10.58 | $317400.00 |
| 2026-08-25 | GRIFFITH, JOSEPH H. IV | Chief Financial Officer | Sale | 11,459 | $10.95 | $125476.05 |
| 2026-08-21 | AWM, INVESTMENT COMPANY, INC. | 10% Owner | Sale | 41,578 | $10.61 | $441159.21 |
| 2026-08-20 | AWM, INVESTMENT COMPANY, INC. | 10% Owner | Sale | 8,422 | $10.52 | $88638.18 |
| 2026-08-17 | KNOPP, KEVIN J. | Director, President and CEO | Sale | 20,000 | $10.35 | $207000.00 |
| 2026-08-13 | KNOPP, KEVIN J. | Director, President and CEO | Sale | 7,622 | $10.06 | $76677.32 |
| 2026-08-12 | KNOPP, KEVIN J. | Director, President and CEO | Sale | 2,747 | $10.07 | $27662.29 |
| 2026-08-11 | KNOPP, KEVIN J. | Director, President and CEO | Sale | 115,748 | $9.83 | $1.14M |
| 2026-08-11 | KNOPP, KEVIN J. | Director, President and CEO | Sale | 30,170 | $10.16 | $306527.20 |
| 2026-08-11 | BROWN, CHRISTOPHER D. | Director | Sale | 8,358 | $9.23 | $77144.34 |
| 2026-08-10 | KNOPP, KEVIN J. | Director, President and CEO | Sale | 348 | $9.06 | $3152.88 |
| 2026-08-10 | BROWN, CHRISTOPHER D. | Director | Sale | 9,442 | $9.03 | $85261.26 |
| 2026-08-05 | BROWN, CHRISTOPHER D. | Director | Sale | 20,000 | $8.49 | $169800.00 |
| 2026-08-04 | AWM, INVESTMENT COMPANY, INC. | 10% Owner | Sale | 50,000 | $8.36 | $417765.00 |
| 2026-08-01 | VANN, BRANDI C | Director | Sale | 5,192 | — | — |
| 2026-08-01 | VANN, BRANDI C | Director | Buy | 5,192 | — | — |
| 2026-07-02 | KNOPP, KEVIN J. | Director, President and CEO | Sale | 222 | $9.07 | $2013.54 |
| 2026-07-02 | BROWN, CHRISTOPHER D. | Director | Sale | 2,200 | $9.02 | $19844.00 |
| 2026-06-30 | BROWN, CHRISTOPHER D. | Director | Sale | 20,000 | $8.84 | $176800.00 |
| 2026-06-26 | KNOPP, KEVIN J. | Director, President and CEO | Sale | 2,798 | $9.09 | $25433.82 |
| 2026-06-25 | LEONHART, MICHELE M. | Director | Sale | 6,486 | — | — |
| 2026-06-25 | LEONHART, MICHELE M. | Director | Buy | 6,486 | — | — |
| 2026-06-25 | KNOPP, KEVIN J. | Director, President and CEO | Sale | 16,388 | $9.10 | $149130.80 |
| 2026-06-24 | KNOPP, KEVIN J. | Director, President and CEO | Sale | 40,535 | $9.14 | $370489.90 |
| 2026-06-23 | KNOPP, KEVIN J. | Director, President and CEO | Sale | 3,422 | $9.06 | $31003.32 |
| 2026-06-23 | BROWN, CHRISTOPHER D. | Director | Sale | 9,900 | $9.04 | $89496.00 |
| 2026-06-23 | AWM, INVESTMENT COMPANY, INC. | 10% Owner | Sale | 3,050 | $9.00 | $27462.50 |
| 2026-06-22 | AWM, INVESTMENT COMPANY, INC. | 10% Owner | Sale | 4,668 | $8.99 | $41965.32 |
| 2026-06-11 | VANN, BRANDI C | Director | Buy | 6,209 | — | — |
| 2026-06-11 | VANN, BRANDI C | Director | Buy | 13,656 | — | — |
| 2026-06-11 | SPOTO, MARK | Director | Buy | 6,209 | — | — |
| 2026-06-11 | SPOTO, MARK | Director | Buy | 13,656 | — | — |
| 2026-06-11 | LEONHART, MICHELE M. | Director | Buy | 6,209 | — | — |
| 2026-06-11 | LEONHART, MICHELE M. | Director | Buy | 13,656 | — | — |
| 2026-06-11 | HUNT, ANTHONY | Director | Buy | 6,209 | — | — |
| 2026-06-11 | HUNT, ANTHONY | Director | Buy | 13,656 | — | — |
| 2026-06-11 | HRUSOVSKY, E KEVIN | Director | Buy | 6,209 | — | — |
| 2026-06-11 | HRUSOVSKY, E KEVIN | Director | Buy | 13,656 | — | — |
| 2026-06-11 | ELOI, FENEL M | Director | Buy | 6,209 | — | — |
| 2026-06-11 | ELOI, FENEL M | Director | Buy | 13,656 | — | — |
| 2026-06-11 | CRANDELL, KEITH | Director | Buy | 6,209 | — | — |
| 2026-06-11 | CRANDELL, KEITH | Director | Buy | 13,656 | — | — |
| 2026-06-10 | SPOTO, MARK | Director | Sale | 14,083 | — | — |
| 2026-06-10 | SPOTO, MARK | Director | Buy | 14,083 | — | — |
| 2026-06-10 | LEONHART, MICHELE M. | Director | Sale | 14,083 | — | — |
| 2026-06-10 | LEONHART, MICHELE M. | Director | Buy | 14,083 | — | — |
| 2026-06-10 | HUNT, ANTHONY | Director | Sale | 14,083 | — | — |
| 2026-06-10 | HUNT, ANTHONY | Director | Buy | 14,083 | — | — |
| 2026-06-10 | HRUSOVSKY, E KEVIN | Director | Sale | 14,083 | — | — |
| 2026-06-10 | HRUSOVSKY, E KEVIN | Director | Buy | 14,083 | — | — |
| 2026-06-10 | ELOI, FENEL M | Director | Sale | 14,083 | — | — |
| 2026-06-10 | ELOI, FENEL M | Director | Buy | 14,083 | — | — |
| 2026-06-10 | CRANDELL, KEITH | Director | Sale | 14,083 | — | — |
| 2026-06-10 | CRANDELL, KEITH | Director | Buy | 14,083 | — | — |
| 2026-06-04 | BROWN, CHRISTOPHER D. | Director | Sale | 100 | $9.00 | $900.00 |
| 2026-06-04 | AWM, INVESTMENT COMPANY, INC. | 10% Owner | Sale | 39,782 | $8.97 | $356856.47 |
| 2026-06-03 | BROWN, CHRISTOPHER D. | Director | Sale | 20,000 | $8.73 | $174600.00 |
| 2026-06-02 | AWM, INVESTMENT COMPANY, INC. | 10% Owner | Sale | 2,500 | $8.95 | $22375.00 |
| 2026-05-28 | GRIFFITH, JOSEPH H. IV | Chief Financial Officer | Sale | 6,940 | $9.03 | $62668.20 |
| 2026-05-28 | BROWN, CHRISTOPHER D. | Director | Sale | 30,000 | $9.00 | $270000.00 |
| 2026-05-28 | AWM, INVESTMENT COMPANY, INC. | 10% Owner | Sale | 170,442 | $8.66 | $1.48M |
| 2026-05-27 | AWM, INVESTMENT COMPANY, INC. | 10% Owner | Sale | 15,000 | $8.25 | $123790.50 |
| 2026-05-27 | AWM, INVESTMENT COMPANY, INC. | 10% Owner | Sale | 1,500 | $8.25 | $12375.00 |
| 2026-05-11 | AWM, INVESTMENT COMPANY, INC. | 10% Owner | Sale | 5,000 | $8.25 | $41257.00 |
| 2026-05-08 | KENNEWEG, JOHN | SVP, Sales & Product Marketing | Sale | 18,255 | $8.11 | $148048.05 |
| 2026-05-08 | AWM, INVESTMENT COMPANY, INC. | 10% Owner | Sale | 3,025 | $8.20 | $24805.00 |
| 2026-05-07 | AWM, INVESTMENT COMPANY, INC. | 10% Owner | Sale | 12,819 | $8.20 | $105169.64 |
| 2026-05-06 | BROWN, CHRISTOPHER D. | Director | Sale | 20,000 | $7.23 | $144600.00 |
| 2026-05-06 | AWM, INVESTMENT COMPANY, INC. | 10% Owner | Sale | 57,365 | $8.06 | $462155.39 |
| 2026-05-06 | AWM, INVESTMENT COMPANY, INC. | 10% Owner | Sale | 5,000 | $8.00 | $40000.00 |
| 2026-05-01 | KENNEWEG, JOHN | SVP, Sales & Product Marketing | Sale | 26,042 | — | — |
| 2026-05-01 | KENNEWEG, JOHN | SVP, Sales & Product Marketing | Buy | 26,042 | — | — |
| 2026-05-01 | KENNEWEG, JOHN | SVP, Sales & Product Marketing | Sale | 7,787 | $6.83 | $53185.21 |
| 2026-04-28 | KENNEWEG, JOHN | SVP, Sales & Product Marketing | Buy | 26,042 | — | — |
| 2026-04-21 | OTITOJU, KOLAWOLE A. | Chief Bus. & Strategy Officer | Buy | 146,789 | — | — |
| 2026-04-21 | OTITOJU, KOLAWOLE A. | Chief Bus. & Strategy Officer | Buy | 110,193 | — | — |
| 2026-04-10 | MCCALLION, KEVIN J. | SVP, Products and Production | Sale | 2,693 | — | — |
| 2026-04-10 | MCCALLION, KEVIN J. | SVP, Products and Production | Buy | 2,693 | $1.05 | $2827.65 |
| 2026-04-10 | BROWN, CHRISTOPHER D. | Director | Sale | 17,578 | $7.07 | $124276.46 |
| 2026-04-09 | MCCALLION, KEVIN J. | SVP, Products and Production | Sale | 5,420 | — | — |
| 2026-04-09 | MCCALLION, KEVIN J. | SVP, Products and Production | Buy | 5,420 | $1.05 | $5691.00 |
| 2026-04-09 | BROWN, CHRISTOPHER D. | Director | Sale | 7,392 | $7.04 | $52039.68 |
| 2026-04-08 | MCCALLION, KEVIN J. | SVP, Products and Production | Sale | 18,580 | — | — |
| 2026-04-08 | MCCALLION, KEVIN J. | SVP, Products and Production | Buy | 18,580 | $1.05 | $19509.00 |
| 2026-04-08 | BROWN, CHRISTOPHER D. | Director | Sale | 15,030 | $7.05 | $105961.50 |
| 2026-03-02 | MCCALLION, KEVIN J. | SVP, Products and Production | Sale | 7 | — | — |
| 2026-03-02 | MCCALLION, KEVIN J. | SVP, Products and Production | Buy | 7 | $1.05 | $7.35 |
| 2026-02-02 | KNOPP, KEVIN J. | Director, President and CEO | Buy | 90,043 | — | — |
| 2026-02-02 | KNOPP, KEVIN J. | Director, President and CEO | Buy | 205,978 | — | — |
| 2026-02-02 | KNOPP, KEVIN J. | Director, President and CEO | Sale | 34,764 | $6.18 | $214841.52 |
| 2026-02-02 | GRIFFITH, JOSEPH H. IV | Chief Financial Officer | Buy | 52,967 | — | — |
| 2026-02-02 | GRIFFITH, JOSEPH H. IV | Chief Financial Officer | Buy | 121,164 | — | — |
Frequently asked questions
Are MASS insiders buying or selling?
Over the transactions on record, MASS insiders have been net sellers, with about $8.94M in stock sold across 65 sales, against 5 open-market purchases.
Does insider selling at MASS mean the stock will fall?
Not by itself. Most executive selling is pre-scheduled through 10b5-1 plans filed months in advance, and insiders sell for diversification, taxes, and liquidity far more often than out of any view on the price. Insider buying is the stronger signal, especially when several insiders buy around the same time, because there is usually only one reason to put personal cash into the stock.
Which MASS insiders are selling the most?
Recent selling is concentrated in a few names. AWM, INVESTMENT COMPANY, INC. accounts for the largest share on record, with about $3.97M sold. Selling by one or two individuals matters less than broad selling across the whole leadership team, which is the pattern worth watching.