908 Devices Inc. (MASS) Insider Trading
Over the last 3 months, MASS insiders made 0 open-market buys and 30 sales, a net sale of -$4.7M (SEC Form 4). Over the last 6 months, 71 institutions increased and 88 reduced their position (13F).
Insider Activity
Sentiment
0/100
Buys (3m)
0
Sells (3m)
30
Net (3m)
-$4.7M
Insider trades by month Buys Sells
Oct
Feb
Mar
Apr
May
Jun
Context3-month price +42.2%Institutions mixed (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Jun 30, 2026 | Knopp Kevin J.director, officer: President and CEO | Sell | 2,798 | $9.09 |
| Jun 25, 2026 | Knopp Kevin J.director, officer: President and CEO | Sell | 16,388 | $9.10 |
| Jun 25, 2026 | Knopp Kevin J.director, officer: President and CEO | Sell | 3,422 | $9.06 |
| Jun 25, 2026 | Leonhart Michele M.director | Option | 6,486 | — |
| Jun 25, 2026 | Knopp Kevin J.director, officer: President and CEO | Sell | 40,535 | $9.14 |
| Jun 25, 2026 | Brown Christopher D.director | Sell | 9,900 | $9.04 |
| Jun 24, 2026 | AWM Investment Company, Inc.10 percent owner | Sell | 3,050 | $9.00 |
| Jun 24, 2026 | AWM Investment Company, Inc.10 percent owner | Sell | 4,668 | $8.99 |
| Jun 12, 2026 | CRANDELL KEITHdirector | Grant | 6,209 | $8.22 |
| Jun 12, 2026 | Leonhart Michele M.director | Option | 14,083 | — |
| Jun 12, 2026 | HRUSOVSKY E KEVINdirector | Grant | 6,209 | $8.22 |
| Jun 12, 2026 | Hunt Anthonydirector | Grant | 6,209 | $8.22 |
| Jun 12, 2026 | CRANDELL KEITHdirector | Option | 14,083 | — |
| Jun 12, 2026 | Vann Brandi Cdirector | Grant | 13,656 | — |
| Jun 12, 2026 | Hunt Anthonydirector | Option | 14,083 | — |
| Jun 12, 2026 | Spoto Markdirector | Option | 14,083 | — |
| Jun 12, 2026 | Vann Brandi Cdirector | Grant | 6,209 | $8.22 |
| Jun 12, 2026 | ELOI FENEL Mdirector | Option | 14,083 | — |
| Jun 12, 2026 | Hunt Anthonydirector | Grant | 13,656 | — |
| Jun 12, 2026 | CRANDELL KEITHdirector | Grant | 13,656 | — |
| Jun 12, 2026 | ELOI FENEL Mdirector | Grant | 13,656 | — |
| Jun 12, 2026 | HRUSOVSKY E KEVINdirector | Option | 14,083 | — |
| Jun 12, 2026 | Leonhart Michele M.director | Grant | 6,209 | $8.22 |
| Jun 12, 2026 | ELOI FENEL Mdirector | Grant | 6,209 | $8.22 |
| Jun 12, 2026 | HRUSOVSKY E KEVINdirector | Grant | 13,656 | — |
| Jun 12, 2026 | Spoto Markdirector | Grant | 13,656 | — |
| Jun 12, 2026 | Leonhart Michele M.director | Grant | 13,656 | — |
| Jun 12, 2026 | Spoto Markdirector | Grant | 6,209 | $8.22 |
| Jun 5, 2026 | Brown Christopher D.director | Sell | 100 | $9.00 |
| Jun 4, 2026 | Brown Christopher D.director | Sell | 20,000 | $8.73 |
Source: MASS SEC Form 4 filings, latest Jun 30, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their MASS positions over the last 6 months (SEC Form 13F).
Increased
71
New positions
33
Reduced
88
Sold out
27
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| FIRST LIGHT ASSET MANAGEMENT, LLC | Increased | 6.1M | May 15, 2026 |
| AWM INVESTMENT COMPANY, INC. | Unchanged | 5.2M | Feb 13, 2026 |
| AWM INVESTMENT COMPANY, INC. | Unchanged | 5.2M | May 15, 2026 |
| FIRST LIGHT ASSET MANAGEMENT, LLC | Increased | 4.8M | Feb 17, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 2.2M | May 15, 2026 |
| ARK INVESTMENT MANAGEMENT LLC | Increased | 2.0M | Feb 11, 2026 |
| ARK INVESTMENT MANAGEMENT LLC | Reduced | 1.9M | May 12, 2026 |
| BLACKROCK, INC. | Increased | 1.8M | Feb 12, 2026 |
| BLACKROCK, INC. | Reduced | 1.8M | May 13, 2026 |
| FIRST EAGLE INVESTMENT MANAGEMENT, LLC | Increased | 1.6M | May 14, 2026 |
| VANGUARD GROUP INC | Increased | 1.5M | Jan 29, 2026 |
| NEEDHAM INVESTMENT MANAGEMENT LLC | Increased | 1.2M | May 15, 2026 |
| NEEDHAM INVESTMENT MANAGEMENT LLC | Increased | 770K | Feb 17, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 695K | May 15, 2026 |
| GRANAHAN INVESTMENT MANAGEMENT, LLC | Increased | 695K | May 15, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.