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)
DateInsiderTypeSharesPrice
Jun 30, 2026Knopp Kevin J.director, officer: President and CEOSell2,798$9.09
Jun 25, 2026Knopp Kevin J.director, officer: President and CEOSell16,388$9.10
Jun 25, 2026Knopp Kevin J.director, officer: President and CEOSell3,422$9.06
Jun 25, 2026Leonhart Michele M.directorOption6,486
Jun 25, 2026Knopp Kevin J.director, officer: President and CEOSell40,535$9.14
Jun 25, 2026Brown Christopher D.directorSell9,900$9.04
Jun 24, 2026AWM Investment Company, Inc.10 percent ownerSell3,050$9.00
Jun 24, 2026AWM Investment Company, Inc.10 percent ownerSell4,668$8.99
Jun 12, 2026CRANDELL KEITHdirectorGrant6,209$8.22
Jun 12, 2026Leonhart Michele M.directorOption14,083
Jun 12, 2026HRUSOVSKY E KEVINdirectorGrant6,209$8.22
Jun 12, 2026Hunt AnthonydirectorGrant6,209$8.22
Jun 12, 2026CRANDELL KEITHdirectorOption14,083
Jun 12, 2026Vann Brandi CdirectorGrant13,656
Jun 12, 2026Hunt AnthonydirectorOption14,083
Jun 12, 2026Spoto MarkdirectorOption14,083
Jun 12, 2026Vann Brandi CdirectorGrant6,209$8.22
Jun 12, 2026ELOI FENEL MdirectorOption14,083
Jun 12, 2026Hunt AnthonydirectorGrant13,656
Jun 12, 2026CRANDELL KEITHdirectorGrant13,656
Jun 12, 2026ELOI FENEL MdirectorGrant13,656
Jun 12, 2026HRUSOVSKY E KEVINdirectorOption14,083
Jun 12, 2026Leonhart Michele M.directorGrant6,209$8.22
Jun 12, 2026ELOI FENEL MdirectorGrant6,209$8.22
Jun 12, 2026HRUSOVSKY E KEVINdirectorGrant13,656
Jun 12, 2026Spoto MarkdirectorGrant13,656
Jun 12, 2026Leonhart Michele M.directorGrant13,656
Jun 12, 2026Spoto MarkdirectorGrant6,209$8.22
Jun 5, 2026Brown Christopher D.directorSell100$9.00
Jun 4, 2026Brown Christopher D.directorSell20,000$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
InstitutionActionSharesFiled
FIRST LIGHT ASSET MANAGEMENT, LLCIncreased6.1MMay 15, 2026
AWM INVESTMENT COMPANY, INC.Unchanged5.2MFeb 13, 2026
AWM INVESTMENT COMPANY, INC.Unchanged5.2MMay 15, 2026
FIRST LIGHT ASSET MANAGEMENT, LLCIncreased4.8MFeb 17, 2026
VANGUARD CAPITAL MANAGEMENT LLCNew Position2.2MMay 15, 2026
ARK INVESTMENT MANAGEMENT LLCIncreased2.0MFeb 11, 2026
ARK INVESTMENT MANAGEMENT LLCReduced1.9MMay 12, 2026
BLACKROCK, INC.Increased1.8MFeb 12, 2026
BLACKROCK, INC.Reduced1.8MMay 13, 2026
FIRST EAGLE INVESTMENT MANAGEMENT, LLCIncreased1.6MMay 14, 2026
VANGUARD GROUP INCIncreased1.5MJan 29, 2026
NEEDHAM INVESTMENT MANAGEMENT LLCIncreased1.2MMay 15, 2026
NEEDHAM INVESTMENT MANAGEMENT LLCIncreased770KFeb 17, 2026
GEODE CAPITAL MANAGEMENT, LLCIncreased695KMay 15, 2026
GRANAHAN INVESTMENT MANAGEMENT, LLCIncreased695KMay 15, 2026

Source: SEC Form 13F filings. For informational purposes only — not investment advice.