MASS 908 Devices Inc.

NASDAQ
$9.52

908 Devices Inc. (MASS) Institutional Ownership

What the institutions did with MASS last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.

Managers compared
121
filed both this quarter and last
Managers holding
110
+2 on the quarter
Buyers
56
13 opened new
Sellers
47
11 sold out entirely
Buyer share
54.4%
of managers who traded it
Breadth
+8.7
net buyers, as a share of those trading

Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.

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Ownership map

Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.

Cut Unchanged Added Color saturates at ±50%.

Largest holders

Manager Shares % of reported
First Light Asset Management, LLC 6.3M 21.7%
AWM Investment Company, Inc. 4.9M 16.8%
ARK Investment Management LLC 2.0M 7.0%
BlackRock, Inc. 1.9M 6.7%
First Eagle Investment Management, LLC 1.9M 6.4%
NEEDHAM INVESTMENT MANAGEMENT LLC 1.8M 6.3%
VANGUARD CAPITAL MANAGEMENT LLC 1.3M 4.5%
GEODE CAPITAL MANAGEMENT, LLC 761.8K 2.6%
Granahan Investment Management, LLC 692.1K 2.4%
STATE STREET CORP 606.6K 2.1%
ESSEX INVESTMENT MANAGEMENT CO LLC 470.2K 1.6%
MORGAN STANLEY 404.1K 1.4%
Prescott Group Capital Management, L.L.C. 361.6K 1.2%
Meros Investment Management, LP 361.4K 1.2%
AMERICAN CENTURY COMPANIES INC 359.8K 1.2%
HighMark Wealth Management LLC 339.8K 1.2%
NORTHERN TRUST CORP 266.4K 0.9%
BANK OF AMERICA CORP /DE/ 251.0K 0.9%
CHARLES SCHWAB INVESTMENT MANAGEMENT INC 233.9K 0.8%
Sumitomo Mitsui Trust Group, Inc. 228.7K 0.8%
Amova Asset Management Americas, Inc. 228.7K 0.8%
VANGUARD PORTFOLIO MANAGEMENT LLC 194.9K 0.7%
RENAISSANCE TECHNOLOGIES LLC 191.9K 0.7%
VANGUARD FIDUCIARY TRUST CO 186.1K 0.6%
RAYMOND JAMES FINANCIAL INC 167.3K 0.6%

Largest changes

Manager Action Previous Current Change
First Eagle Investment Management, LLC Increased 803.6K 1.9M +1.1M
NEEDHAM INVESTMENT MANAGEMENT LLC Increased 1.2M 1.8M +580.6K
Tao Capital Management LP Sold Out 569.0K 0 -569.0K
AWM Investment Company, Inc. Reduced 5.2M 4.9M -320.2K
AMERICAN CENTURY COMPANIES INC Increased 55.9K 359.8K +304.0K
BANK OF AMERICA CORP /DE/ Increased 25.1K 251.0K +225.9K
First Light Asset Management, LLC Increased 6.1M 6.3M +210.2K
GSA CAPITAL PARTNERS LLP Reduced 251.0K 49.2K -201.9K
BlackRock, Inc. Increased 1.8M 1.9M +176.9K
Squarepoint Ops LLC Reduced 213.2K 37.7K -175.5K
VANGUARD CAPITAL MANAGEMENT LLC Increased 1.1M 1.3M +172.3K
MILLENNIUM MANAGEMENT LLC Sold Out 142.4K 0 -142.4K
SEI INVESTMENTS CO Reduced 164.9K 77.7K -87.2K
CITADEL ADVISORS LLC Reduced 144.5K 62.7K -81.8K
Campbell & CO Investment Adviser LLC Increased 29.7K 111.2K +81.5K
ARK Investment Management LLC Increased 1.9M 2.0M +81.2K
D. E. Shaw & Co., Inc. New 0 75.4K +75.4K
Trexquant Investment LP Sold Out 73.2K 0 -73.2K
Cassaday & Co Wealth Management LLC Sold Out 71.6K 0 -71.6K
ACADIAN ASSET MANAGEMENT LLC New 0 70.4K +70.4K
GEODE CAPITAL MANAGEMENT, LLC Increased 695.5K 761.8K +66.3K
TWO SIGMA INVESTMENTS, LP Sold Out 44.1K 0 -44.1K
XTX Topco Ltd Sold Out 41.4K 0 -41.4K
Sumitomo Mitsui Trust Group, Inc. Reduced 269.9K 228.7K -41.2K
Amova Asset Management Americas, Inc. Reduced 269.9K 228.7K -41.2K
Nuveen, LLC Increased 101.1K 141.7K +40.7K
RENAISSANCE TECHNOLOGIES LLC Reduced 230.2K 191.9K -38.3K
GOLDMAN SACHS GROUP INC Reduced 111.2K 76.2K -35.0K
VANGUARD PORTFOLIO MANAGEMENT LLC Increased 163.7K 194.9K +31.2K
MORGAN STANLEY Increased 373.3K 404.1K +30.8K
NORTHERN TRUST CORP Increased 241.3K 266.4K +25.1K
Mitsubishi UFJ Asset Management Co., Ltd. Reduced 132.5K 110.6K -21.9K
ESSEX INVESTMENT MANAGEMENT CO LLC Reduced 491.2K 470.2K -21.0K
Brevan Howard Capital Management LP New 0 20.7K +20.7K
HighMark Wealth Management LLC Increased 319.4K 339.8K +20.4K
STATE STREET CORP Reduced 625.9K 606.6K -19.3K
49 WEALTH MANAGEMENT, LLC Sold Out 17.1K 0 -17.1K
UBS Group AG Reduced 93.4K 77.4K -16.0K
PIER 88 INVESTMENT PARTNERS LLC New 0 14.2K +14.2K
Dynamic Technology Lab Private Ltd Sold Out 13.9K 0 -13.9K
WELLS FARGO & COMPANY/MN Increased 10.5K 24.4K +13.9K
Magnetar Financial LLC New 0 13.8K +13.8K
Bank of New York Mellon Corp Increased 59.0K 72.8K +13.7K
NANO CAP NEW MILLENNIUM GROWTH FUND L P Reduced 120.0K 107.5K -12.5K
Advyzon Investment Management, LLC New 0 12.3K +12.3K
LPL Financial LLC Reduced 67.8K 55.5K -12.3K
OCCUDO QUANTITATIVE STRATEGIES LP New 0 12.3K +12.3K
CITIGROUP INC Increased 1.4K 13.4K +12.0K
WEALTH ENHANCEMENT ADVISORY SERVICES, LLC New 0 11.3K +11.3K
Schonfeld Strategic Advisors LLC New 0 11.1K +11.1K
AXQ CAPITAL, LP New 0 10.7K +10.7K
SUSQUEHANNA INTERNATIONAL GROUP, LLP Reduced 33.8K 23.4K -10.5K
Intelligence Driven Advisers, LLC Sold Out 10.0K 0 -10.0K
DEUTSCHE BANK AG\ Increased 18.4K 28.4K +10.0K
RAYMOND JAMES FINANCIAL INC Reduced 176.5K 167.3K -9.2K
IQ EQ FUND MANAGEMENT (IRELAND) Ltd Increased 89.8K 98.7K +8.9K
FMR LLC Increased 10.5K 19.4K +8.9K
Quantinno Capital Management LP Increased 23.7K 31.1K +7.4K
ALLIANCEBERNSTEIN L.P. Increased 33.2K 39.6K +6.4K
VANGUARD FIDUCIARY TRUST CO Increased 180.3K 186.1K +5.8K

13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.