Quick Takeaways
- MASS - 908 Devices Inc. has 21 insiders with reported activity on this page.
- Net insider value flow over the last year: -$949,708.
- Recent transaction rows are available for direct filing-level review.
- Info
- Insider Trading
- Financials
- Holders
Insider Transactions Reported by 21 Insiders of 908 Devices Inc.
- Symbol
- MASS on Nasdaq
- Location
- Burlington, MA
What Changed
- Buy value: $174,234; sell value: $1,123,941.
- Net share flow: -123,482.
Why This Matters
- This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
- Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.
Official SEC Source
Insider trading overview
Last 12 monthsNet insider flow leans to selling over the last 12 months. Net value: -$949,708.
Buys
$174,234
Shares: 40,000
Insiders: 2
Sells
$1,123,942
Shares: 163,482
Insiders: 5
Net
-$949,708
Shares: -123,482
Insiders: -3
| Window (months) | Buy shares | Sell shares | Buy $ | Sell $ | Net $ |
|---|---|---|---|---|---|
| 0-3 | 0 | 121,939 | $0 | $809,432 | -$809,432 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 10,000 | $0 | $80,585 | -$80,585 |
| 9-12 | 40,000 | 31,543 | $174,234 | $233,924 | -$59,691 |
908 Devices Inc. executives and other stock owners filed with the SEC include:
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Keith Crandell | Director, 10%+ Owner | $26,739,062 | Mixed | 11 Jun 2025 | ||
| AWM Investment Company, Inc. | 10%+ Owner | $12,235,421 | Mixed | 04 Mar 2025 | ||
| Kevin J. Knopp | President and CEO, Director | $7,760,502 | -$83,458 | -1.1% | Mixed | 01 Feb 2026 |
| Christopher D. Brown | Director | $6,685,102 | -$282,278 | -4.1% | Filing P/S | 08 Apr 2026 |
| E. Kevin Hrusovsky | Director | $2,236,565 | Mixed | 11 Jun 2025 | ||
| Trent A. Basarsky | VP, Corporate Development | $966,400 | Mixed | 27 Apr 2022 | ||
| Joseph H. Griffith IV | Chief Financial Officer | $864,557 | -$272,942 | -24% | Filing P/S | 01 Feb 2026 |
| Mark Spoto | Director | $414,024 | +$42,850 | +12% | Mixed | 14 Oct 2025 |
| John Kenneweg | SVP, Sales & Product Marketing | $370,395 | Mixed | 26 Feb 2026 | ||
| Nicolas Barthelemy | Director | $349,353 | Mixed | 15 Jun 2022 | ||
| Kevin J. McCallion | SVP, Products and Production | $315,822 | -$169,092 | -35% | Filing P/S | 08 Apr 2026 |
| Anthony Hunt | Director | $139,895 | Mixed | 11 Jun 2025 | ||
| Fenel M. Eloi | Director | $124,685 | Mixed | 11 Jun 2025 | ||
| Jeffrey P. George | Director | $124,685 | Mixed | 11 Jun 2025 | ||
| Marcia Eisenberg | Director | $120,700 | Mixed | 11 Jun 2025 | ||
| Michele M. Leonhart | Director | $38,650 | Mixed | 25 Jun 2025 | ||
| Maura Fitzpatrick | VP, Product Management & Mktg | $34,235 | Mixed | 01 Feb 2023 | ||
| Michael S. Turner | Chief Legal & Admin Officer | $0 | -$184,789 | -100% | Mixed | 16 Jun 2025 |
| Brandi C. Vann | Director | Mixed | 01 Aug 2025 | |||
| Michele Fournier | Chief People Officer | Mixed | 29 Apr 2022 | |||
| Mark S. Levine | Chief Legal and Admin. Officer | Mixed | 26 Feb 2026 |
Top shareholders of 908 Devices Inc. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.
Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
| Holder | Source | Role / Reporting | Ownership % | Shares | Holdings Value | 12M Net Δ | As of | Details |
|---|---|---|---|---|---|---|---|---|
| First Light Asset Management, LLC |
13D/G
13F
|
Mathew P. Arens · Company |
17%
|
6,184,739
|
$33,397,591 | +$8,120,952 | 31 Dec 2025 | |
| AWM Investment Company, Inc. |
13F
13D/G
3/4/5
|
Company · 10%+ Owner |
15%
from 13D/G
|
5,199,924
|
$27,299,601 | — | 31 Dec 2025 | |
| Keith Crandell |
3/4/5
|
Director, 10%+ Owner |
—
mixed-class rows
|
5,770,935
mixed-class rows
|
$26,739,062 | — | 11 Jun 2025 | |
| ARK Investment Management LLC |
13D/G
13F
|
Company |
5.4%
|
1,953,772
|
$17,115,043 | -$7,312,787 | 30 Sep 2025 | |
| BlackRock, Inc. |
13F
13D/G
|
Company |
4.6%
from 13D/G
|
1,801,772
|
$9,459,304 | — | 31 Dec 2025 | |
| Kevin J. Knopp |
3/4/5
|
President and CEO, Director |
—
mixed-class rows
|
1,633,212
mixed-class rows
|
$7,760,502 | -$83,458 | 01 Feb 2026 | |
| VANGUARD GROUP INC |
13F
13D/G
|
Company · The Vanguard Group |
3.8%
from 13D/G
|
1,470,864
|
$7,722,037 | — | 31 Dec 2025 | |
| Christopher D. Brown |
3/4/5
|
Director |
—
mixed-class rows
|
967,541
mixed-class rows
|
$6,685,102 | -$282,278 | 08 Apr 2026 | |
| NEEDHAM INVESTMENT MANAGEMENT LLC |
13F
|
Company |
2.1%
|
770,000
|
$4,042,500 | — | 31 Dec 2025 | |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
1.9%
|
688,566
|
$3,615,638 | — | 31 Dec 2025 | |
| First Eagle Investment Management, LLC |
13F
|
Company |
1.7%
|
623,883
|
$3,275,386 | — | 31 Dec 2025 | |
| STATE STREET CORP |
13D/G
13F
|
STATE STREET CORPORATION · Company |
1.6%
|
596,294
|
$3,219,988 | -$9,127,836 | 31 Dec 2025 | |
| Tao Capital Management LP |
13F
|
Company |
1.6%
|
568,981
|
$2,987,150 | — | 31 Dec 2025 | |
| ESSEX INVESTMENT MANAGEMENT CO LLC |
13F
|
Company |
1.3%
|
482,614
|
$2,533,724 | — | 31 Dec 2025 | |
| MORGAN STANLEY |
13F
|
Company |
1.2%
|
440,486
|
$2,312,556 | — | 31 Dec 2025 | |
| E. Kevin Hrusovsky |
3/4/5
|
Director |
—
mixed-class rows
|
501,581
mixed-class rows
|
$2,236,565 | — | 11 Jun 2025 | |
| PRESCOTT GROUP CAPITAL MANAGEMENT, L.L.C. |
13F
|
Company |
1%
|
361,595
|
$1,898,374 | — | 31 Dec 2025 | |
| Meros Investment Management, LP |
13F
|
Company |
0.96%
|
347,035
|
$1,821,934 | — | 31 Dec 2025 | |
| Sumitomo Mitsui Trust Group, Inc. |
13F
|
Company |
0.8%
|
288,081
|
$1,512,425 | — | 31 Dec 2025 | |
| Amova Asset Management Americas, Inc. |
13F
|
Company |
0.8%
|
288,081
|
$1,509,544 | — | 31 Dec 2025 | |
| GM Advisory Group, LLC |
13F
|
Company |
0.77%
|
278,792
|
$1,463,658 | — | 31 Dec 2025 | |
| CITADEL ADVISORS LLC |
13F
|
Company |
0.73%
|
264,373
|
$1,387,959 | — | 31 Dec 2025 | |
| DIMENSIONAL FUND ADVISORS LP |
13F
|
Company |
0.68%
|
246,614
|
$1,294,615 | — | 31 Dec 2025 | |
| HighMark Wealth Management LLC |
13F
|
Company |
0.67%
|
241,000
|
$1,265,250 | — | 31 Dec 2025 | |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC |
13F
|
Company |
0.67%
|
240,929
|
$1,264,877 | — | 31 Dec 2025 | |
| NORTHERN TRUST CORP |
13F
|
Company |
0.64%
|
230,294
|
$1,209,044 | — | 31 Dec 2025 | |
| RENAISSANCE TECHNOLOGIES LLC |
13F
|
Company |
0.61%
|
222,100
|
$1,166,025 | — | 31 Dec 2025 | |
| Squarepoint Ops LLC |
13F
|
Company |
0.6%
|
218,676
|
$1,148,049 | — | 31 Dec 2025 | |
| GOLDMAN SACHS GROUP INC |
13F
|
Company |
0.55%
|
199,286
|
$1,046,252 | — | 31 Dec 2025 | |
| MARSHALL WACE, LLP |
13F
|
Company |
0.53%
|
190,635
|
$1,000,834 | — | 31 Dec 2025 | |
| Trent A. Basarsky |
3/4/5
|
VP, Corporate Development |
—
mixed-class rows
|
145,779
mixed-class rows
|
$966,400 | — | 27 Apr 2022 | |
| RAYMOND JAMES FINANCIAL INC |
13F
|
Company |
0.49%
|
178,267
|
$935,902 | — | 31 Dec 2025 | |
| Joseph H. Griffith IV |
3/4/5
|
Chief Financial Officer |
—
mixed-class rows
|
314,027
mixed-class rows
|
$864,557 | -$272,942 | 01 Feb 2026 | |
| MILLENNIUM MANAGEMENT LLC |
13F
|
Company |
0.44%
|
158,103
|
$830,041 | — | 31 Dec 2025 | |
| Legato Capital Management LLC |
13F
|
Company |
0.43%
|
155,594
|
$816,868 | — | 31 Dec 2025 | |
| HRT FINANCIAL LP |
13F
|
Company |
0.43%
|
154,830
|
$812,000 | — | 31 Dec 2025 | |
| Mitsubishi UFJ Asset Management Co., Ltd. |
13F
|
Company |
0.39%
|
140,503
|
$715,160 | — | 31 Dec 2025 | |
| GSA CAPITAL PARTNERS LLP |
13F
|
Company |
0.34%
|
122,137
|
$641,000 | — | 31 Dec 2025 | |
| NANO CAP NEW MILLENNIUM GROWTH FUND L P |
13F
|
Company |
0.33%
|
120,000
|
$630,000 | — | 31 Dec 2025 | |
| UBS Group AG |
13F
|
Company |
0.31%
|
112,654
|
$591,434 | — | 31 Dec 2025 | |
| AQR CAPITAL MANAGEMENT LLC |
13F
|
Company |
0.29%
|
104,806
|
$550,231 | — | 31 Dec 2025 | |
| Nuveen, LLC |
13F
|
Company |
0.28%
|
99,988
|
$524,938 | — | 31 Dec 2025 | |
| Granahan Investment Management, LLC |
13F
|
Company |
0.25%
|
91,141
|
$478,490 | — | 31 Dec 2025 | |
| BANK OF MONTREAL /CAN/ |
13F
|
Company |
0.25%
|
90,852
|
$476,974 | — | 31 Dec 2025 | |
| SEI INVESTMENTS CO |
13F
|
Company |
0.23%
|
81,960
|
$430,290 | — | 31 Dec 2025 | |
| ACADIAN ASSET MANAGEMENT LLC |
13F
|
Company |
0.23%
|
81,862
|
$428,000 | — | 31 Dec 2025 | |
| Campbell & CO Investment Adviser LLC |
13F
|
Company |
0.22%
|
80,553
|
$422,903 | — | 31 Dec 2025 | |
| Mark Spoto |
3/4/5
|
Director |
—
mixed-class rows
|
99,461
mixed-class rows
|
$414,024 | +$42,850 | 14 Oct 2025 | |
| IQ EQ FUND MANAGEMENT (IRELAND) Ltd |
13F
|
Company |
0.22%
|
78,026
|
$409,637 | — | 31 Dec 2025 | |
| TWO SIGMA INVESTMENTS, LP |
13F
|
Company |
0.2%
|
72,327
|
$379,717 | — | 31 Dec 2025 |
Recent Insider Transactions by Companies or Individuals for 908 Devices Inc.
Showing up to 300 most recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | Value $ | * Price $ | Shares | Shares Owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Christopher D. Brown | MASS | Common Stock | Sale | -1.83% | $124,276 | $7.07 | -17,578 | 945,559 | 10 Apr 2026 | Direct |
| Kevin J. McCallion | MASS | Common Stock | Sale | -10.8% | $38,103 | $7.03 | -5,420 | 44,925 | 09 Apr 2026 | Direct |
| Kevin J. McCallion | MASS | Common Stock | Options Exercise | 12.1% | 5,420 | 50,345 | 09 Apr 2026 | Direct | ||
| Kevin J. McCallion | MASS | Stock Option (right to buy) | Options Exercise | -66.9% | -5,420 | 2,686 | 09 Apr 2026 | Direct | ||
| Christopher D. Brown | MASS | Common Stock | Sale | -0.76% | $52,040 | $7.04 | -7,392 | 963,137 | 09 Apr 2026 | Direct |
| Kevin J. McCallion | MASS | Common Stock | Sale | -29.3% | $130,989 | $7.05 | -18,580 | 44,925 | 08 Apr 2026 | Direct |
| Kevin J. McCallion | MASS | Common Stock | Options Exercise | 41.4% | 18,580 | 63,505 | 08 Apr 2026 | Direct | ||
| Kevin J. McCallion | MASS | Stock Option (right to buy) | Options Exercise | -69.6% | -18,580 | 8,106 | 08 Apr 2026 | Direct | ||
| Christopher D. Brown | MASS | Common Stock | Sale | -1.53% | $105,962 | $7.05 | -15,030 | 970,529 | 08 Apr 2026 | Direct |
| Kevin J. McCallion | MASS | Common Stock | Sale | -0.02% | -7 | 44,925 | 02 Mar 2026 | Direct | ||
| Kevin J. McCallion | MASS | Common Stock | Options Exercise | 0.02% | 7 | 44,932 | 02 Mar 2026 | Direct | ||
| Kevin J. McCallion | MASS | Stock Option (right to buy) | Options Exercise | -0.03% | -7 | 26,686 | 02 Mar 2026 | Direct | ||
| Kevin J. Knopp | MASS | Common Stock | Sale | -4.18% | $214,842 | $6.18 | -34,764 | 795,968 | 02 Feb 2026 | Direct |
| Kevin J. Knopp | MASS | Stock Option (option to buy) | Award | 90,043 | 90,043 | 02 Feb 2026 | Direct | |||
| Kevin J. Knopp | MASS | Restricted Stock Units | Award | 205,978 | 205,978 | 02 Feb 2026 | Direct | |||
| Joseph H. Griffith IV | MASS | Common Stock | Sale | -14.2% | $143,222 | $6.18 | -23,175 | 139,896 | 02 Feb 2026 | Direct |
| Joseph H. Griffith IV | MASS | Stock Option (option to buy) | Award | 52,967 | 52,967 | 02 Feb 2026 | Direct | |||
| Joseph H. Griffith IV | MASS | Restricted Stock Units | Award | 121,164 | 121,164 | 02 Feb 2026 | Direct | |||
| Christopher D. Brown | MASS | Common Stock | Options Exercise | 2.44% | 23,437 | 985,559 | 01 Feb 2026 | Direct | ||
| Christopher D. Brown | MASS | Restricted Stock Units | Options Exercise | -100% | -23,437 | 0 | 01 Feb 2026 | Direct | ||
| Kevin J. Knopp | MASS | Common Stock | Options Exercise | 14.9% | 107,999 | 830,732 | 01 Feb 2026 | Direct | ||
| Kevin J. Knopp | MASS | Restricted Stock Units | Options Exercise | -100% | -107,999 | 0 | 01 Feb 2026 | Direct | ||
| Joseph H. Griffith IV | MASS | Common Stock | Options Exercise | 75.5% | 70,141 | 163,071 | 01 Feb 2026 | Direct | ||
| Joseph H. Griffith IV | MASS | Restricted Stock Units | Options Exercise | -100% | -70,141 | 0 | 01 Feb 2026 | Direct | ||
| Mark Spoto | MASS | Common Stock | Gift | 1.25% | 928 | 75,263 | 30 Dec 2025 | Direct | ||
| Mark Spoto | MASS | Common Stock | Gift | -100% | -928 | 0 | 30 Dec 2025 | By spouse | ||
| Mark Spoto | MASS | Common Stock | Will/Inheritance | 928 | 928 | 14 Oct 2025 | By spouse | |||
| Joseph H. Griffith IV | MASS | Common Stock | Sale | -4.41% | $38,849 | $9.05 | -4,292 | 92,930 | 03 Oct 2025 | Direct |
| Joseph H. Griffith IV | MASS | Common Stock | Sale | -0.72% | $6,398 | $9.04 | -708 | 97,222 | 02 Oct 2025 | Direct |
| Joseph H. Griffith IV | MASS | Common Stock | Sale | -4.86% | $35,338 | $7.07 | -5,000 | 97,930 | 19 Sep 2025 | Direct |
| Brandi C. Vann | MASS | Stock Option (option to buy) | Award | 20,409 | 20,409 | 01 Aug 2025 | Direct | |||
| Brandi C. Vann | MASS | Restricted Stock Unit | Award | 15,577 | 15,577 | 01 Aug 2025 | Direct | |||
| Michele M. Leonhart | MASS | Common Stock | Options Exercise | 6,485 | 6,485 | 25 Jun 2025 | Direct | |||
| Michele M. Leonhart | MASS | Restricted Stock Units | Options Exercise | -33.3% | -6,485 | 12,971 | 25 Jun 2025 | Direct | ||
| Michael S. Turner | MASS | Common Stock | Sale | -100% | $10,298 | $7.50 | -1,373 | 0 | 18 Jun 2025 | Direct |
| Michael S. Turner | MASS | Common Stock | Sale | -83.9% | $53,653 | $7.51 | -7,148 | 1,373 | 17 Jun 2025 | Direct |
| Michael S. Turner | MASS | Common Stock | Sale | -65.4% | $120,839 | $7.51 | -16,082 | 8,521 | 16 Jun 2025 | Direct |
| Michele M. Leonhart | MASS | Stock Option (option to buy) | Award | 6,516 | 6,516 | 12 Jun 2025 | Direct | |||
| Michele M. Leonhart | MASS | Restricted Stock Units | Award | 14,083 | 14,083 | 12 Jun 2025 | Direct | |||
| E. Kevin Hrusovsky | MASS | Stock Option (option to buy) | Award | 6,516 | 6,516 | 12 Jun 2025 | Direct | |||
| E. Kevin Hrusovsky | MASS | Restricted Stock Units | Award | 14,083 | 14,083 | 12 Jun 2025 | Direct | |||
| Anthony Hunt | MASS | Stock Option (option to buy) | Award | 6,516 | 6,516 | 12 Jun 2025 | Direct | |||
| Anthony Hunt | MASS | Restricted Stock Units | Award | 14,083 | 14,083 | 12 Jun 2025 | Direct | |||
| Jeffrey P. George | MASS | Stock Option (option to buy) | Award | 6,516 | 6,516 | 12 Jun 2025 | Direct | |||
| Jeffrey P. George | MASS | Restricted Stock Units | Award | 14,083 | 14,083 | 12 Jun 2025 | Direct | |||
| Fenel M. Eloi | MASS | Stock Option (option to buy) | Award | 6,516 | 6,516 | 12 Jun 2025 | Direct | |||
| Fenel M. Eloi | MASS | Restricted Stock Units | Award | 14,083 | 14,083 | 12 Jun 2025 | Direct | |||
| Keith Crandell | MASS | Stock Option (option to buy) | Award | 6,516 | 6,516 | 12 Jun 2025 | Direct | |||
| Keith Crandell | MASS | Restricted Stock Units | Award | 14,083 | 14,083 | 12 Jun 2025 | Direct | |||
| Mark Spoto | MASS | Stock Option (option to buy) | Award | 6,516 | 6,516 | 12 Jun 2025 | Direct |
* An asterisk sign (*) next to the price indicates that the price is likely invalid.