Skip to content
Disclosery

MASS 908 DEVICES INC

Follow

Stock (common), issuer CIK 1555279

88 managers (88 13F filers) reported a position in MASS shares at 2025-03-31, 20,622,671 shares in all. 22 filers opened a position and 16 filers sold out during the quarter.

Managers
88
13F filers
88
New
22
Added
30
Reduced
19
Sold out
16
Shares held by filers
20,622,671

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

The latest Form 4 transactions, non-derivative.
OwnerDateSharesPriceFiling
Brown Christopher D.director2026-10-07+60,000 M$1.75Form 4
Brown Christopher D.director2026-10-07-30,000 S$11.89Form 4
Griffith Joseph H. IVofficer (Chief Financial Officer)2026-10-06-5,000 S$13.03Form 4

13F holders, Q1 2025

Filers in the available 13F reports with a share position at 2025-03-31, 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
AWM Investment Company, Inc.5,199,924$23.3M3.21%+3,526,00013F-HRTimeline
ARK Investment Management LLCin group ARK Investment Management LLC2,899,347$13M0.13%+110,78113F-HRTimelineGroup
BlackRock, Inc.in group BlackRock, Inc.1,746,984$7.83M<0.01%-180,03413F-HRTimelineGroup
First Light Asset Management, LLC1,701,095$7.62M0.87%new13F-HRTimeline
VANGUARD GROUP INCin group VANGUARD GROUP INC1,362,170$6.1M<0.01%+37,63613F-HRTimelineGroup
Invesco Ltd.in group Invesco Ltd.649,630$2.91M<0.01%new13F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC589,839$2.64M<0.01%+8,53913F-HRTimelineGroup
Tao Capital Management LP568,981$2.55M2.2%013F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY531,609$2.38M<0.01%+265,04113F-HRTimelineGroup
ESSEX INVESTMENT MANAGEMENT CO LLC480,549$2.15M0.45%new13F-HRTimeline
STATE STREET CORPin group STATE STREET CORP467,865$2.1M<0.01%+10,51813F-HRTimelineGroup
Sumitomo Mitsui Trust Group, Inc.in group Sumitomo Mitsui Trust Group, …412,574$1.85M<0.01%-54,85313F-HRTimelineGroup
Amova Asset Management Americas, Inc.in group Amova Asset Management Americ…412,574$1.83M0.02%-54,85313F-HRTimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP384,332$1.72M<0.01%013F-HRTimelineGroup
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.339,715$1.52M<0.01%+253,85513F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co212,230$951K<0.01%+10,46213F-HR/ATimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP200,021$896K<0.01%-74313F-HRTimelineGroup
NEEDHAM INVESTMENT MANAGEMENT LLCin group NEEDHAM INVESTMENT MANAGEMENT…200,000$896K0.08%013F-HRTimelineGroup
Prescott Group Capital Management, L.L.…190,005$851K0.12%+40,00513F-HRTimeline
RENAISSANCE TECHNOLOGIES LLC144,600$648K<0.01%-150,35613F-HRTimeline
Legato Capital Management LLC142,442$638K0.09%new13F-HRTimeline
MARSHALL WACE, LLPin group MARSHALL WACE, LLP141,234$633K<0.01%+102,73413F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/112,906$506K<0.01%+18,15313F-HRTimelineGroup
Nuveen, LLCin group TIAA106,951$479K<0.01%13F-HRTimelineGroup
BANK OF MONTREAL /CAN/in group BANK OF MONTREAL /CAN/90,278$404K<0.01%+33,96813F-HRTimelineGroup
LPL Financial LLC83,009$372K<0.01%+19,72213F-HRTimeline
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC81,558$365K<0.01%new13F-HRTimelineGroup
FNY Investment Advisers, LLC75,489$338K0.21%new13F-HRTimeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC74,656$334K<0.01%-189,60113F-HR/ATimelineGroup
TWO SIGMA INVESTMENTS, LPgroup of 2 filers holding69,927$313K+37,427Timeline
Bruce & Co., Inc.68,286$306K0.1%013F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…65,727$294K<0.01%+30,10313F-HRTimelineGroup
Bank of New York Mellon Corpin group Bank of New York Mellon Corp51,915$233K<0.01%+1,98513F-HRTimelineGroup
GSA CAPITAL PARTNERS LLP51,838$232K0.02%-66,04713F-HRTimeline
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC45,814$205K<0.01%+4,47113F-HRTimelineGroup
49 WEALTH MANAGEMENT, LLC45,738$205K0.02%-3,93213F-HRTimeline
PDT Partners, LLC41,600$186K0.01%new13F-HRTimeline
ALLIANCEBERNSTEIN L.P.41,190$185K<0.01%013F-HRTimeline
XTX Topco Ltdin group XTX Topco Ltd38,208$171K0.01%-13,98813F-HRTimelineGroup
UBS Group AGin group UBS Group AG37,123$166K<0.01%+15,36913F-HRTimelineGroup
RHUMBLINE ADVISERS34,522$155K<0.01%-1,75613F-HR/ATimeline
BRIDGEWAY CAPITAL MANAGEMENT, LLC30,500$137K<0.01%-55,00013F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS24,230$109K<0.01%+18,05013F-HRTimelineGroup
BARCLAYS PLCin group BARCLAYS PLC24,031$108K<0.01%-20,09713F-HR/ATimelineGroup
Concurrent Investment Advisors, LLCin group Concurrent Investment Advisor…23,470$105K<0.01%013F-HRTimelineGroup
IQ EQ FUND MANAGEMENT (IRELAND) Ltd22,862$102K0.01%+12,25813F-HRTimeline
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\20,670$92.6K<0.01%-78,56913F-HRTimelineGroup
SG Americas Securities, LLC20,278$91K<0.01%+9,75813F-HRTimeline
Thrivent Financial for Lutheransin group Thrivent Financial for Luther…23,470$85K<0.01%013F-HR/ATimelineGroup
HSBC HOLDINGS PLCin group HSBC HOLDINGS PLC20,264$84.5K<0.01%-74313F-HRTimelineGroup
AXQ CAPITAL, LP18,165$81.4K0.03%new13F-HRTimeline
CITIGROUP INCin group CITIGROUP INC17,483$78.3K<0.01%-10,36413F-HRTimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN14,019$62.8K<0.01%+31113F-HRTimelineGroup
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…13,957$62.5K<0.01%+62413F-HRTimelineGroup
WOLVERINE TRADING, LLC14,353$58K<0.01%new13F-HRTimeline
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO12,534$56.2K<0.01%+78713F-HRTimelineGroup
PRICE T ROWE ASSOCIATES INC /MD/12,410$56K<0.01%new13F-HRTimeline
ZACKS INVESTMENT MANAGEMENT12,388$55.5K<0.01%new13F-HRTimeline
Cresset Asset Management, LLC12,187$54.6K<0.01%+44213F-HRTimeline
Corebridge Financial, Inc.in group Corebridge Financial, Inc.11,626$52.1K<0.01%-17313F-HRTimelineGroup
Cambridge Investment Research Advisors,…10,000$45K<0.01%new13F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…8,523$38.2K<0.01%-4,62813F-HRTimelineGroup
NEW YORK STATE COMMON RETIREMENT FUND8,487$38K<0.01%013F-HR/ATimeline
CWM, LLCin group CWM, LLC6,963$31K<0.01%+5,87713F-HRTimelineGroup
FMR LLCin group FMR LLC6,274$28.1K<0.01%+3,78013F-HRTimelineGroup
Allworth Financial LP5,269$27.6K<0.01%013F-HRTimeline
Police & Firemen's Retirement System of…5,622$25.2K<0.01%new13F-HRTimeline
ANTIPODES PARTNERS Ltd4,382$19.6K<0.01%new13F-HRTimeline
Larson Financial Group LLC3,638$16.3K<0.01%new13F-HRTimeline
SIMPLEX TRADING, LLC3,516$15K<0.01%-1,34113F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA3,357$15K<0.01%+56213F-HR/ATimelineGroup
Versant Capital Management, Inc1,989$8.91K<0.01%new13F-HRTimeline
Legal & General Group Plcin group Legal & General Group Plc1,821$8.16K<0.01%013F-HRTimelineGroup
CALIFORNIA STATE TEACHERS RETIREMENT SY…1,720$7.71K<0.01%013F-HRTimeline
HM PAYSON & CO1,500$6.72K<0.01%013F-HRTimeline
SIGNATUREFD, LLC1,447$6.48K<0.01%013F-HRTimeline
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…1,442$6.46K<0.01%013F-HRTimelineGroup
NISA INVESTMENT ADVISORS, LLC684$3.06K<0.01%+53513F-HRTimeline
AMALGAMATED BANK766$3K<0.01%013F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…483$2.16K<0.01%new13F-HRTimelineGroup
Sterling Capital Management LLC374$1.68K<0.01%-37113F-HRTimeline
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.250$1.12K<0.01%+12513F-HRTimelineGroup
COLDSTREAM CAPITAL MANAGEMENT INC247$1.11K<0.01%new13F-HRTimeline
Rise Advisors, LLC207$927<0.01%new13F-HRTimeline
SouthState Bank Corpin group SouthState Bank Corp200$896<0.01%new13F-HRTimelineGroup
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…126$564<0.01%new13F-HRTimelineGroup
True Wealth Design, LLC32$144<0.01%new13F-HRTimeline
CONCOURSE FINANCIAL GROUP SECURITIES, I…0$0013F-HRTimelineValue filed as zero, left out of ratios. Amount filed as zero, left out of ratios.

Events

  • Brown Christopher D. acquired 30,000 MASS shares on 2026-10-07, Form 4 filed 2026-10-09. 0001836988-26-000027

    Accepted , ingested

  • Griffith Joseph H. IV sold 5,000 MASS shares on 2026-10-06, Form 4 filed 2026-10-08. 0001431531-26-000009

    Accepted , ingested