$MASS

$11.65 +$0.16 (1.39%) Close

$MASS Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 41.3M shares outstanding

Who owns MASS?

By type of holder

Institutions 67.5% Insiders 32.5% Everyone else 0.0%

Concentration Top 10 holders own 80.2%

Crandell Keith 27.8% · First Light Asset Management, LLC 15.2%

Institutional ownership

67.5%

+0.2 pts vs last qtr

Institutional holders

109

-2 vs last qtr

Net shares bought

+94.9K

by institutions in Q2 2026

New / sold out

14 / 16

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Needham Investment Management LLC +580.6K
American Century Companies Inc +304.0K

Biggest sellers in Q2 2026

Tao Capital Management LP SOLD OUT −569.0K
AWM Investment Company, Inc. −320.2K

Who is planning to sell?

Notices of proposed sale, last 12 months

$5.3M

12 notices from 7 people

Shares covered

606.3K

1.47% of the company

Arranged in advance

97%

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

Kevin Knopp Officer 10b5-1 $2.28M
Christopher Brown Director 10b5-1 $2.18M

Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

Diluted share count, FY2020–FY2025

+554.5%

+45.61% a year

Each share's claim on the business

−84.7%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

— vs $41.6M

over 6 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years32% 3–5 years2% 1–3 years59% Under 1 year7%

Quarterly turnover

9.0%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting MASS on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
FL First Light Asset Management, LLC	6.3M	15.20%	+210.2K (+3.5%)	2025	3.3%
Shares held by quarter Peak holding6.3M (Q2'26) Change over 8 quarters+6.3M Share of the company15.200% First Light Asset Management, LLC's full portfolio →
AI AWM Investment Company, Inc.	4.9M	11.81%	−320.2K (−6.2%)	2023	3.7%
Shares held by quarter Peak holding5.2M (Q1'25) Change over 8 quarters+3.3M Share of the company11.810% AWM Investment Company, Inc.'s full portfolio →

First Light Asset Management, LLC

6.3M

% of company

15.20%

Change vs last qtr

+210.2K (+3.5%)

Held since

2025

AWM Investment Company, Inc.

4.9M

% of company

11.81%

Change vs last qtr

−320.2K (−6.2%)

Held since

2023

28 more super investors behind a free account

See every manager holding 908 Devices Inc., how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting MASS on Form N-PORT; together they hold 22.7% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
AG ARK Genomic Revolution ETF ARK ETF Trust	$15.3M	1.9M	4.61%	0.98%	July 31, 2026
NA Needham Aggressive Growth Fund Needham Funds Inc	$12.2M	1.4M	3.38%	0.47%	June 30, 2026

ARK Genomic Revolution ETF

ARK ETF Trust

Position value

$15.3M

% of company

4.61%

% of the fund

0.98%

As of

July 31, 2026

Needham Aggressive Growth Fund

Needham Funds Inc

Position value

$12.2M

% of company

3.38%

% of the fund

0.47%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding 908 Devices Inc. and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
CK Crandell Keith Insider	11.5M	27.80%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company27.800% Crandell Keith's insider activity →
KK Knopp Kevin J. Insider	1.6M	3.96%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company3.960% Knopp Kevin J.'s insider activity →

Crandell Keith

Insider

11.5M

% of company

27.80%

Change vs last qtr

—

Held since

—

Knopp Kevin J.

Insider

1.6M

% of company

3.96%

Change vs last qtr

—

Held since

—

12 more holders behind a free account

See every insider and 5%+ holder of 908 Devices Inc..

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