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Disclosery

MASS 908 DEVICES INC

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Stock (common), issuer CIK 1555279

108 managers (112 13F filers) reported a position in MASS shares at 2026-06-30, 28,070,501 shares in all. 14 filers opened a position and 11 filers sold out during the quarter.

Managers
108
13F filers
112
New
14
Added
43
Reduced
36
Sold out
11
Shares held by filers
28,070,501

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q2 2026

Filers in the available 13F reports with a share position at 2026-06-30, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
First Light Asset Management, LLC6,282,804$54.7M3.32%+210,24113F-HRTimeline
AWM Investment Company, Inc.4,879,773$42.5M3.68%-320,15113F-HRTimeline
ARK Investment Management LLC2,027,920$17.6M0.11%+81,23513F-HRTimeline
BlackRock, Inc.in group BlackRock, Inc.1,944,236$16.9M<0.01%+176,92013F-HRTimelineGroup
NEEDHAM INVESTMENT MANAGEMENT LLCin group NEEDHAM INVESTMENT MANAGEMENT…1,820,620$15.8M0.48%+580,62013F-HRTimelineGroup
VANGUARD GROUP INCgroup of 4 filers holding1,682,770$14.6M+209,304Timeline
First Eagle Investment Management, LLCin group First Eagle Investment Manage…929,985$8.09M0.01%+126,37913F-HR/ATimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC761,797$6.63M<0.01%+66,34213F-HRTimelineGroup
Granahan Investment Management, LLC692,092$6.02M0.21%-2,97813F-HRTimeline
STATE STREET CORPin group STATE STREET CORP606,560$5.28M<0.01%-19,33213F-HRTimelineGroup
ESSEX INVESTMENT MANAGEMENT CO LLC470,244$4.09M0.54%-20,97713F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY404,078$3.52M<0.01%+30,82013F-HRTimelineGroup
Prescott Group Capital Management, L.L.…361,595$3.15M0.27%013F-HRTimeline
Meros Investment Management, LP361,368$3.14M1%-37013F-HRTimeline
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC359,848$3.13M<0.01%+303,95413F-HRTimelineGroup
HighMark Wealth Management LLC339,783$2.96M0.99%+20,43313F-HRTimeline
NORTHERN TRUST CORPin group NORTHERN TRUST CORP266,417$2.32M<0.01%+25,08513F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/251,027$2.18M<0.01%+225,94913F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co233,892$2.03M<0.01%+4,40313F-HRTimelineGroup
Sumitomo Mitsui Trust Group, Inc.in group Sumitomo Mitsui Trust Group, …228,681$1.99M<0.01%-41,19213F-HRTimelineGroup
Amova Asset Management Americas, Inc.in group Amova Asset Management Americ…228,681$1.98M0.03%-41,19213F-HRTimelineGroup
RENAISSANCE TECHNOLOGIES LLC191,900$1.67M<0.01%-38,30013F-HRTimeline
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC167,348$1.46M<0.01%-9,17213F-HRTimelineGroup
Legato Capital Management LLC158,119$1.38M0.11%+4,66913F-HRTimeline
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…149,655$1.3M<0.01%+4,32613F-HRTimelineGroup
Nuveen, LLCin group TIAA141,727$1.23M<0.01%+40,65313F-HRTimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP124,498$1.08M<0.01%+5,74713F-HRTimelineGroup
Campbell & CO Investment Adviser LLC111,190$967K0.05%+81,53413F-HRTimeline
Mitsubishi UFJ Asset Management Co., Lt…in group Mitsubishi UFJ Trust & Bankin…110,557$962K<0.01%-21,90913F-HRTimelineGroup
NANO CAP NEW MILLENNIUM GROWTH FUND L P107,500$935K0.72%-12,50013F-HRTimeline
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC103,909$904K<0.01%-49713F-HRTimelineGroup
IQ EQ FUND MANAGEMENT (IRELAND) Ltd98,689$859K0.05%+8,92013F-HRTimeline
BANK OF MONTREAL /CAN/in group BANK OF MONTREAL /CAN/87,346$760K<0.01%-2913F-HRTimelineGroup
UBS Group AGgroup of 2 filers holding78,952$687K-16,029Timeline
SEI INVESTMENTS COin group SEI INVESTMENTS CO77,719$676K<0.01%-87,17513F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC76,230$663K<0.01%-34,98213F-HRTimelineGroup
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.75,446$656K<0.01%new13F-HRTimelineGroup
Bank of New York Mellon Corpin group Bank of New York Mellon Corp72,758$633K<0.01%+13,71713F-HRTimelineGroup
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC70,374$609K<0.01%new13F-HRTimelineGroup
Bruce & Co., Inc.68,286$594K0.16%013F-HRTimeline
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC62,747$546K<0.01%-81,80013F-HRTimelineGroup
LPL Financial LLC55,451$482K<0.01%-12,33813F-HRTimeline
BRIDGEWAY CAPITAL MANAGEMENT, LLC50,500$439K0.01%013F-HRTimeline
GSA CAPITAL PARTNERS LLP49,160$428K0.03%-201,86813F-HRTimeline
Old Port Advisors38,629$336K0.07%013F-HRTimeline
Squarepoint Ops LLCin group Squarepoint Ops LLC37,739$328K<0.01%-175,45413F-HRTimelineGroup
RHUMBLINE ADVISERS36,791$320K<0.01%+2,24113F-HRTimeline
Quantinno Capital Management LP31,131$271K<0.01%+7,40613F-HRTimeline
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\28,412$247K<0.01%+9,98313F-HRTimelineGroup
ALLIANCEBERNSTEIN L.P.39,550$242K<0.01%+6,40013F-HRTimeline
STATE OF WISCONSIN INVESTMENT BOARD27,170$236K<0.01%+97213F-HRTimeline
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN24,372$212K<0.01%+13,89213F-HRTimelineGroup
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…23,374$203K<0.01%-10,46713F-HRTimelineGroup
Brevan Howard Capital Management LPin group Brevan Howard Capital Managem…20,692$180K<0.01%new13F-HRTimelineGroup
PRICE T ROWE ASSOCIATES INC /MD/20,387$178K<0.01%+1,00213F-HRTimeline
FMR LLCin group FMR LLC19,399$169K<0.01%+8,85613F-HRTimelineGroup
MetLife Investment Management, LLCin group MetLife Investment Management…17,292$150K<0.01%+27013F-HRTimelineGroup
Cresset Asset Management, LLC16,343$142K<0.01%013F-HRTimeline
Invesco Ltd.in group Invesco Ltd.14,960$130K<0.01%+83213F-HRTimelineGroup
Graham Capital Management, L.P.14,827$129K<0.01%+1,58013F-HRTimeline
PIER 88 INVESTMENT PARTNERS LLC14,200$124K0.03%new13F-HRTimeline
Magnetar Financial LLCin group Magnetar Financial LLC13,815$120K<0.01%new13F-HRTimelineGroup
CITIGROUP INCin group CITIGROUP INC13,429$117K<0.01%+12,00013F-HRTimelineGroup
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…13,401$117K<0.01%+37313F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO12,559$111K<0.01%+1,25913F-HRTimelineGroup
Advyzon Investment Management, LLC12,338$107K0.01%new13F-HRTimeline
GAINLINE FINANCIAL PARTNERS, LLC12,338$107K0.1%13F-HRTimeline
OCCUDO QUANTITATIVE STRATEGIES LP12,256$107K0.01%new13F-HRTimeline
Concurrent Investment Advisors, LLCin group Concurrent Investment Advisor…11,903$104K<0.01%013F-HRTimelineGroup
PCM Encore, LLC11,830$103K0.02%013F-HRTimeline
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC11,445$99.6K<0.01%-2,85613F-HRTimelineGroup
Schonfeld Strategic Advisors LLC11,134$96.9K<0.01%new13F-HRTimeline
AXQ CAPITAL, LP10,704$93.1K0.01%new13F-HRTimeline
WEALTH ENHANCEMENT ADVISORY SERVICES, L…11,325$91.7K<0.01%new13F-HRTimeline
Police & Firemen's Retirement System of…8,523$74.2K<0.01%013F-HRTimeline
NEW YORK STATE COMMON RETIREMENT FUND8,487$73.8K<0.01%013F-HRTimeline
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.5,625$48.9K<0.01%+52513F-HRTimelineGroup
BARCLAYS PLCin group BARCLAYS PLC5,106$44.4K<0.01%+12813F-HRTimelineGroup
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS4,362$37.9K<0.01%-1,58313F-HRTimelineGroup
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA4,175$37K<0.01%+3,75713F-HRTimelineGroup
Pinnacle Wealth Planning Services, Inc.4,180$36.4K<0.01%013F-HRTimeline
ANTIPODES PARTNERS Ltd3,994$34.7K<0.01%-40813F-HRTimeline
Allworth Financial LP3,373$29.3K<0.01%-1,97613F-HRTimeline
Legal & General Group Plcin group Legal & General Group Plc3,049$26.5K<0.01%+55713F-HRTimelineGroup
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…2,795$24.3K<0.01%013F-HRTimelineGroup
SIGNATUREFD, LLC1,447$12.6K<0.01%-51913F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…1,134$9.87K<0.01%-3,00613F-HRTimelineGroup
Versant Capital Management, Inc1,070$9.31K<0.01%013F-HRTimeline
NISA INVESTMENT ADVISORS, LLC684$5.95K<0.01%013F-HRTimeline
GAMMA Investing LLC668$5.81K<0.01%+6213F-HRTimeline
Parallel Advisors, LLC634$5.52K<0.01%-1,30313F-HRTimeline
Sterling Capital Management LLC587$5.11K<0.01%+23913F-HRTimeline
FEDERATED HERMES, INC.in group FEDERATED HERMES, INC.510$4.44K<0.01%+15013F-HRTimelineGroup
Arax Advisory Partners405$3.52K<0.01%new13F-HRTimeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…389$3.38K<0.01%-1,09313F-HR/ATimeline
SUMMIT SECURITIES GROUP LLC229$1.99K<0.01%new13F-HRTimeline
Integrated Wealth Concepts LLC226$1.97K<0.01%new13F-HRTimeline
Essential Partners LLC218$1.9K<0.01%013F-HRTimeline
Farther Finance Advisors, LLC203$1.78K<0.01%-19013F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…151$1.31K<0.01%-513F-HRTimelineGroup
Cornerstone Financial Management LLC129$1.12K<0.01%013F-HR/ATimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…109$948<0.01%-2113F-HRTimelineGroup
SJS Investment Consulting Inc.26$227<0.01%new13F-HRTimeline
True Wealth Design, LLC18$157<0.01%-1113F-HRTimeline
SBI Securities Co., Ltd.3$26<0.01%013F-HRTimeline
Caitong International Asset Management …3$26<0.01%-113F-HRTimeline
Optiver Holding B.V.in group Optiver Holding B.V.2$17<0.01%-28013F-HRTimelineGroup
FNY Investment Advisers, LLC10$00%-4013F-HRTimelineValue filed as zero, left out of ratios.