MASS
908 Devices Inc.$8.30+0.08 (+0.97%)Prev Close$8.22·MCap$230.4M·P/E12.52·Vol114.3K·Yield—
▲
Buys (12M)
0
$0.00
▼
Sells (12M)
16
$1.99M
◆
Net Activity
Net Seller
$1.99M
●
Active Insiders
7
last 12 mo
Over the past 12 months, insider activity at 908 Devices Inc. (MASS) has been exclusively selling, with 0 insider purchases totaling $0.00 and 16 insider sales totaling $1.99M. The most recent insider transaction was by Brown Christopher D. (director), who sold $900.00 worth of shares on Jun 5, 2026. 908 Devices Inc. operates in the Healthcare sector, within the Medical - Devices industry, with a market cap of $230.4M.
MASS Insider Trading Activity
| Date | Insider | Role | Type | Shares | Avg Price | Value | Shares After |
|---|---|---|---|---|---|---|---|
| Jun 5, 2026 | Brown Christopher D. | director | Sell | 100 | $9.00 | $900.00 | 875,459 |
| Jun 4, 2026 | Brown Christopher D. | director | Sell | 20,000 | $8.73 | $174.6K | 875,559 |
| May 29, 2026 | Brown Christopher D. | director | Sell | 30,000 | $9.00 | $270.0K | 895,559 |
| May 29, 2026 | Griffith Joseph H. IV | officer: Chief Financial Officer | Sell | 6,940 | $9.03 | $62.7K | 132,956 |
| May 13, 2026 | AWM Investment Company, Inc. | 10 percent owner | Sell | 5,000 | $8.25 | $41.3K | 5,116,715 |
| May 11, 2026 | Kenneweg John | officer: SVP, Sales & Product Marketing | Sell | 18,255 | $8.11 | $148.0K | 57,784 |
| May 7, 2026 | Brown Christopher D. | director | Sell | 20,000 | $7.23 | $144.6K | 925,559 |
| May 4, 2026 | Kenneweg John | officer: SVP, Sales & Product Marketing | Sell | 7,787 | $6.83 | $53.2K | 76,039 |
| Apr 14, 2026 | McCallion Kevin J. | officer: SVP, Products and Production | Sell | 2,693 | $7.01 | $18.9K | 44,925 |
| Apr 10, 2026 | Brown Christopher D. | director | Sell | 40,000 | $7.06 | $282.3K | 970,529 |
| Apr 10, 2026 | McCallion Kevin J. | officer: SVP, Products and Production | Sell | 24,000 | $7.05 | $169.1K | 44,925-35% |
| Feb 1, 2026 | Griffith Joseph H. IV | Chief Financial Officer | Sell | 23,175 | $6.18 | $143.2K | 0 |
| Feb 1, 2026 | Knopp Kevin J. | President and CEO | Sell | 34,764 | $6.18 | $214.8K | 0 |
| Oct 2, 2025 | Griffith Joseph H. IV | Chief Financial Officer | Sell | 5,000 | $9.05 | $45.2K | 0 |
| Sep 19, 2025 | Griffith Joseph H. IV | Chief Financial Officer | Sell | 5,000 | $7.07 | $35.3K | 0 |
| Jun 16, 2025 | Turner Michael S. | Chief Legal & Admin Officer | Sell | 24,603 | $7.51 | $184.8K | 0 |
| Jun 4, 2025 | Griffith Joseph H. IV | Chief Financial Officer | Sell | 6,940 | $7.08 | $49.1K | 0 |
| May 15, 2025 | Knopp Kevin J. | President and CEO | Buy | 15,000 | $4.44 | $66.6K | 0 |
| May 14, 2025 | Knopp Kevin J. | President and CEO | Buy | 15,000 | $4.32 | $64.8K | 0 |
| May 14, 2025 | Spoto Mark | Director | Buy | 10,000 | $4.29 | $42.9K | 0 |
| Feb 4, 2025 | Brown Christopher D. | Chief Product Officer | Sell | 7,767 | $2.34 | $18.2K | 968,222 |
| Feb 4, 2025 | Griffith Joseph H. IV | Chief Financial Officer | Sell | 10,236 | $2.34 | $24.0K | 118,146 |
| Feb 4, 2025 | Knopp Kevin J. | President and CEO | Sell | 16,001 | $2.32 | $37.1K | 704,416 |
| Feb 4, 2025 | Turner Michael S. | Chief Legal & Admin Officer | Sell | 9,672 | $2.33 | $22.5K | 32,572 |
| May 13, 2024 | Knopp Kevin J. | President and CEO | Buy | 10,000 | $6.42 | $64.2K | 508,981 |
| May 10, 2024 | Knopp Kevin J. | President and CEO | Buy | 10,000 | $5.77 | $57.7K | 498,981 |
| May 9, 2024 | Knopp Kevin J. | President and CEO | Buy | 10,000 | $5.83 | $58.3K | 488,981 |
| May 8, 2024 | Knopp Kevin J. | President and CEO | Buy | 10,000 | $5.72 | $57.2K | 478,981 |
| May 7, 2024 | Knopp Kevin J. | President and CEO | Buy | 10,000 | $5.60 | $56.0K | 468,981 |
| Feb 2, 2024 | Brown Christopher D. | Chief Product Officer | Sell | 3,957 | $7.01 | $27.7K | 888,752 |
| Feb 2, 2024 | Griffith Joseph H. IV | Chief Financial Officer | Sell | 15,409 | $7.06 | $108.8K | 93,521 |
| Feb 2, 2024 | Knopp Kevin J. | President and CEO | Sell | 9,071 | $7.00 | $63.5K | 416,953 |
| Feb 2, 2024 | Turner Michael S. | Chief Legal & Admin Officer | Sell | 5,232 | $6.99 | $36.6K | 12,721-29% |
| Jan 2, 2024 | Griffith Joseph H. IV | Chief Financial Officer | Sell | 6,000 | $12.08 | $72.5K | 80,000 |
| Dec 21, 2023 | Brown Christopher D. | Chief Product Officer | Sell | 20,000 | $9.10 | $182.0K | 891,815 |
| Dec 21, 2023 | Griffith Joseph H. IV | Chief Financial Officer | Sell | 5,580 | $9.08 | $50.7K | 86,000 |
| Jun 9, 2023 | Brown Christopher D. | Chief Product Officer | Sell | 4,470 | $10.03 | $44.8K | 897,905 |
| May 25, 2023 | Brown Christopher D. | Chief Technology Officer | Sell | 10,000 | $10.02 | $100.2K | 892,375 |
| May 25, 2023 | Knopp Kevin J. | President and CEO | Sell | 60,000 | $10.12 | $607.2K | 367,848 |
| Feb 17, 2023 | Knopp Kevin J. | President and CEO | Sell | 20,000 | $10.25 | $205.0K | 432,690 |
| Feb 3, 2023 | Brown Christopher D. | Chief Technology Officer | Sell | 11,564 | $9.91 | $114.6K | 912,375 |
| Feb 3, 2023 | Fitzpatrick Maura | VP, Product Management & Mktg | Sell | 1,593 | $9.20 | $14.7K | 2,834-36% |
| Feb 3, 2023 | Griffith Joseph H. IV | Chief Financial Officer | Sell | 5,102 | $9.72 | $49.6K | 94,846 |
| Feb 3, 2023 | Knopp Kevin J. | President and CEO | Sell | 44,049 | $10.40 | $458.3K | 487,848 |
| Feb 3, 2023 | Turner Michael S. | VP, General Counsel | Sell | 4,427 | $9.72 | $43.0K | 2,848-61% |
| Nov 23, 2022 | Spoto Mark | Buy | 2,585 | $9.65 | $24.9K | 40,423 | |
| Nov 17, 2022 | Knopp Kevin J. | President and CEO | Sell | 20,000 | $11.04 | $220.8K | 488,274 |
| Oct 19, 2022 | Knopp Kevin J. | President and CEO | Sell | 30,000 | $15.08 | $452.4K | 519,442 |
| Sep 19, 2022 | Knopp Kevin J. | President and CEO | Sell | 30,000 | $16.94 | $508.2K | 530,642 |
| Sep 14, 2022 | Brown Christopher D. | Chief Technology Officer | Sell | 20,000 | $19.58 | $391.6K | 908,912 |
Showing 1–50 of 107
1 / 3
MASS Insider Buying Activity
The following table shows recent insider purchases of 908 Devices Inc. (MASS) stock reported via SEC Form 4 filings.
| Date | Insider | Role | Type | Shares | Avg Price | Value | Shares After |
|---|---|---|---|---|---|---|---|
| May 15, 2025 | Knopp Kevin J. | President and CEO | Buy | 15,000 | $4.44 | $66.6K | 0 |
| May 14, 2025 | Knopp Kevin J. | President and CEO | Buy | 15,000 | $4.32 | $64.8K | 0 |
| May 14, 2025 | Spoto Mark | Director | Buy | 10,000 | $4.29 | $42.9K | 0 |
| May 13, 2024 | Knopp Kevin J. | President and CEO | Buy | 10,000 | $6.42 | $64.2K | 508,981 |
| May 10, 2024 | Knopp Kevin J. | President and CEO | Buy | 10,000 | $5.77 | $57.7K | 498,981 |
| May 9, 2024 | Knopp Kevin J. | President and CEO | Buy | 10,000 | $5.83 | $58.3K | 488,981 |
| May 8, 2024 | Knopp Kevin J. | President and CEO | Buy | 10,000 | $5.72 | $57.2K | 478,981 |
| May 7, 2024 | Knopp Kevin J. | President and CEO | Buy | 10,000 | $5.60 | $56.0K | 468,981 |
| Nov 23, 2022 | Spoto Mark | Buy | 2,585 | $9.65 | $24.9K | 40,423 |
MASS Insider Selling Activity
The following table shows recent insider sales of 908 Devices Inc. (MASS) stock reported via SEC Form 4 filings.
| Date | Insider | Role | Type | Shares | Avg Price | Value | Shares After |
|---|---|---|---|---|---|---|---|
| Jun 5, 2026 | Brown Christopher D. | director | Sell | 100 | $9.00 | $900.00 | 875,459 |
| Jun 4, 2026 | Brown Christopher D. | director | Sell | 20,000 | $8.73 | $174.6K | 875,559 |
| May 29, 2026 | Brown Christopher D. | director | Sell | 30,000 | $9.00 | $270.0K | 895,559 |
| May 29, 2026 | Griffith Joseph H. IV | officer: Chief Financial Officer | Sell | 6,940 | $9.03 | $62.7K | 132,956 |
| May 13, 2026 | AWM Investment Company, Inc. | 10 percent owner | Sell | 5,000 | $8.25 | $41.3K | 5,116,715 |
| May 11, 2026 | Kenneweg John | officer: SVP, Sales & Product Marketing | Sell | 18,255 | $8.11 | $148.0K | 57,784 |
| May 7, 2026 | Brown Christopher D. | director | Sell | 20,000 | $7.23 | $144.6K | 925,559 |
| May 4, 2026 | Kenneweg John | officer: SVP, Sales & Product Marketing | Sell | 7,787 | $6.83 | $53.2K | 76,039 |
| Apr 14, 2026 | McCallion Kevin J. | officer: SVP, Products and Production | Sell | 2,693 | $7.01 | $18.9K | 44,925 |
| Apr 10, 2026 | Brown Christopher D. | director | Sell | 40,000 | $7.06 | $282.3K | 970,529 |
| Apr 10, 2026 | McCallion Kevin J. | officer: SVP, Products and Production | Sell | 24,000 | $7.05 | $169.1K | 44,925-35% |
| Feb 1, 2026 | Griffith Joseph H. IV | Chief Financial Officer | Sell | 23,175 | $6.18 | $143.2K | 0 |
| Feb 1, 2026 | Knopp Kevin J. | President and CEO | Sell | 34,764 | $6.18 | $214.8K | 0 |
| Oct 2, 2025 | Griffith Joseph H. IV | Chief Financial Officer | Sell | 5,000 | $9.05 | $45.2K | 0 |
| Sep 19, 2025 | Griffith Joseph H. IV | Chief Financial Officer | Sell | 5,000 | $7.07 | $35.3K | 0 |
| Jun 16, 2025 | Turner Michael S. | Chief Legal & Admin Officer | Sell | 24,603 | $7.51 | $184.8K | 0 |
| Jun 4, 2025 | Griffith Joseph H. IV | Chief Financial Officer | Sell | 6,940 | $7.08 | $49.1K | 0 |
| Feb 4, 2025 | Brown Christopher D. | Chief Product Officer | Sell | 7,767 | $2.34 | $18.2K | 968,222 |
| Feb 4, 2025 | Griffith Joseph H. IV | Chief Financial Officer | Sell | 10,236 | $2.34 | $24.0K | 118,146 |
| Feb 4, 2025 | Knopp Kevin J. | President and CEO | Sell | 16,001 | $2.32 | $37.1K | 704,416 |
| Feb 4, 2025 | Turner Michael S. | Chief Legal & Admin Officer | Sell | 9,672 | $2.33 | $22.5K | 32,572 |
| Feb 2, 2024 | Brown Christopher D. | Chief Product Officer | Sell | 3,957 | $7.01 | $27.7K | 888,752 |
| Feb 2, 2024 | Griffith Joseph H. IV | Chief Financial Officer | Sell | 15,409 | $7.06 | $108.8K | 93,521 |
| Feb 2, 2024 | Knopp Kevin J. | President and CEO | Sell | 9,071 | $7.00 | $63.5K | 416,953 |
| Feb 2, 2024 | Turner Michael S. | Chief Legal & Admin Officer | Sell | 5,232 | $6.99 | $36.6K | 12,721-29% |
| Jan 2, 2024 | Griffith Joseph H. IV | Chief Financial Officer | Sell | 6,000 | $12.08 | $72.5K | 80,000 |
| Dec 21, 2023 | Brown Christopher D. | Chief Product Officer | Sell | 20,000 | $9.10 | $182.0K | 891,815 |
| Dec 21, 2023 | Griffith Joseph H. IV | Chief Financial Officer | Sell | 5,580 | $9.08 | $50.7K | 86,000 |
| Jun 9, 2023 | Brown Christopher D. | Chief Product Officer | Sell | 4,470 | $10.03 | $44.8K | 897,905 |
| May 25, 2023 | Brown Christopher D. | Chief Technology Officer | Sell | 10,000 | $10.02 | $100.2K | 892,375 |
| May 25, 2023 | Knopp Kevin J. | President and CEO | Sell | 60,000 | $10.12 | $607.2K | 367,848 |
| Feb 17, 2023 | Knopp Kevin J. | President and CEO | Sell | 20,000 | $10.25 | $205.0K | 432,690 |
| Feb 3, 2023 | Brown Christopher D. | Chief Technology Officer | Sell | 11,564 | $9.91 | $114.6K | 912,375 |
| Feb 3, 2023 | Fitzpatrick Maura | VP, Product Management & Mktg | Sell | 1,593 | $9.20 | $14.7K | 2,834-36% |
| Feb 3, 2023 | Griffith Joseph H. IV | Chief Financial Officer | Sell | 5,102 | $9.72 | $49.6K | 94,846 |
| Feb 3, 2023 | Knopp Kevin J. | President and CEO | Sell | 44,049 | $10.40 | $458.3K | 487,848 |
| Feb 3, 2023 | Turner Michael S. | VP, General Counsel | Sell | 4,427 | $9.72 | $43.0K | 2,848-61% |
| Nov 17, 2022 | Knopp Kevin J. | President and CEO | Sell | 20,000 | $11.04 | $220.8K | 488,274 |
| Oct 19, 2022 | Knopp Kevin J. | President and CEO | Sell | 30,000 | $15.08 | $452.4K | 519,442 |
| Sep 19, 2022 | Knopp Kevin J. | President and CEO | Sell | 30,000 | $16.94 | $508.2K | 530,642 |
| Sep 14, 2022 | Brown Christopher D. | Chief Technology Officer | Sell | 20,000 | $19.58 | $391.6K | 908,912 |
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