Who owns MASSWhat MASS owns — n/a

Who owns 908 Devices Inc.?

Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.

Institutional ownership of MASS from SEC Form 13F filings across 111 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.

As of the 2026-06-30 reporting period, 111 institutions disclosed 28.1M shares of 908 Devices Inc. worth $244.1M — about 74.4% of shares outstanding; the largest disclosed holder is First Light Asset Management, LLC. Source: SEC Form 13F filings, parsed by EvidInvest.

111

13F holders

$244.1M

value, 2026 filers

74.4%

of shares outstanding (28.1M sh)

new positions (2026 filers)

Top institutional holders

ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of MASS's shares outstanding

#	Manager	Shares	Value	% of fund	% of co.	Δ shares QoQ
1	First Light Asset Management, LLC	6.3M	$54.7M	3.3%	16.7%	+3.5%
2	AWM Investment Company, Inc.	4.9M	$42.5M	3.7%	12.9%	-6.2%
3	ARK Investment Management LLC	2.0M	$17.6M	0.1%	5.4%	+4.2%
4	BlackRock, Inc.	1.9M	$16.9M	0.0%	5.2%	+10.0%
5	NEEDHAM INVESTMENT MANAGEMENT LLC	1.8M	$15.8M	0.5%	4.8%	+46.8%
6	VANGUARD CAPITAL MANAGEMENT LLC	1.3M	$11.2M	0.0%	3.4%	+15.4%
7	First Eagle Investment Management, LLC	929,985	$8.1M	0.0%	2.5%	+15.7%
8	GEODE CAPITAL MANAGEMENT, LLC	761,797	$6.6M	0.0%	2%	+9.5%
9	Granahan Investment Management, LLC	692,092	$6.0M	0.2%	1.8%	-0.4%
10	STATE STREET CORP	606,560	$5.3M	0.0%	1.6%	-3.1%
11	ESSEX INVESTMENT MANAGEMENT CO LLC	470,244	$4.1M	0.5%	1.2%	-4.3%
12	MORGAN STANLEY	404,078	$3.5M	0.0%	1.1%	+8.3%
13	Prescott Group Capital Management, L.L.C.	361,595	$3.1M	0.3%	1%	0.0%
14	Meros Investment Management, LP	361,368	$3.1M	1.0%	1%	-0.1%
15	AMERICAN CENTURY COMPANIES INC	359,848	$3.1M	0.0%	1%	+543.8%
16	HighMark Wealth Management LLC	339,783	$3.0M	1.0%	0.9%	+6.4%
17	NORTHERN TRUST CORP	266,417	$2.3M	0.0%	0.7%	+10.4%
18	BANK OF AMERICA CORP /DE/	251,027	$2.2M	0.0%	0.7%	+901.0%
19	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	233,892	$2.0M	0.0%	0.6%	+1.9%
20	Sumitomo Mitsui Trust Group, Inc.	228,681	$2.0M	0.0%	0.6%	-15.3%
21	Amova Asset Management Americas, Inc.	228,681	$2.0M	0.0%	0.6%	-15.3%
22	VANGUARD PORTFOLIO MANAGEMENT LLC	194,858	$1.7M	0.0%	0.5%	+19.0%
23	RENAISSANCE TECHNOLOGIES LLC	191,900	$1.7M	0.0%	0.5%	-16.6%
24	VANGUARD FIDUCIARY TRUST CO	186,056	$1.6M	0.0%	0.5%	+3.2%
25	RAYMOND JAMES FINANCIAL INC	167,348	$1.5M	0.0%	0.4%	-5.2%

Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.