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Disclosery

MASS 908 DEVICES INC

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Stock (common), issuer CIK 1555279

81 managers (82 13F filers) reported a position in MASS shares at 2024-12-31, 16,756,086 shares in all. 16 filers opened a position and 20 filers sold out during the quarter.

Managers
81
13F filers
82
New
16
Added
29
Reduced
20
Sold out
20
Shares held by filers
16,756,086

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, Q4 2024

Filers in the available 13F reports with a share position at 2024-12-31, 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
ARK Investment Management LLCin group ARK Investment Management LLC2,788,566$6.13M0.05%-430,98313F-HRTimelineGroup
BlackRock, Inc.in group BlackRock, Inc.1,927,018$4.24M<0.01%+42,53813F-HRTimelineGroup
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC1,814,187$3.99M<0.01%-28,65913F-HRTimelineGroup
AWM Investment Company, Inc.1,673,924$3.68M0.45%+99,59413F-HRTimeline
VANGUARD GROUP INCin group VANGUARD GROUP INC1,324,534$2.91M<0.01%-553,16213F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC581,300$1.28M<0.01%+13,51213F-HRTimelineGroup
Tao Capital Management LP568,981$1.25M0.87%013F-HRTimeline
Granahan Investment Management, LLC522,786$1.15M0.05%-338,64713F-HRTimeline
Sumitomo Mitsui Trust Group, Inc.in group Sumitomo Mitsui Trust Group, …467,427$1.03M<0.01%-27,79513F-HRTimelineGroup
Amova Asset Management Americas, Inc.in group Amova Asset Management Americ…467,427$1.02M0.01%-27,79513F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP457,347$1.01M<0.01%-21,69713F-HRTimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP384,332$845K<0.01%-12,70713F-HRTimelineGroup
RENAISSANCE TECHNOLOGIES LLC294,956$649K<0.01%-27,44413F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY266,568$586K<0.01%+162,59713F-HR/ATimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC264,257$581K<0.01%+181,15813F-HRTimelineGroup
Sands Capital Alternatives, LLC237,258$522K0.11%013F-HRTimeline
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co201,768$444K<0.01%-18,70913F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP200,764$442K<0.01%+14,08713F-HRTimelineGroup
NEEDHAM INVESTMENT MANAGEMENT LLCin group NEEDHAM INVESTMENT MANAGEMENT…200,000$440K0.03%+100,00013F-HRTimelineGroup
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC197,183$434K<0.01%-19,94613F-HRTimelineGroup
Prescott Group Capital Management, L.L.…150,000$330K0.04%new13F-HR/ATimeline
GSA CAPITAL PARTNERS LLP117,885$259K0.02%new13F-HRTimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC116,358$256K<0.01%-15,16613F-HRTimelineGroup
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC113,890$251K<0.01%+61,85113F-HRTimelineGroup
Nuveen Asset Management, LLCin group TIAA106,951$235K<0.01%-97,42013F-HRTimelineGroup
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\99,239$218K<0.01%+91,35913F-HR/ATimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/94,753$208K<0.01%+62,17913F-HRTimelineGroup
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.85,860$189K<0.01%+28,26313F-HRTimelineGroup
BRIDGEWAY CAPITAL MANAGEMENT, LLC85,500$188K<0.01%013F-HRTimeline
Bruce & Co., Inc.68,286$150K0.05%013F-HRTimeline
LPL Financial LLC63,287$139K<0.01%+7,29513F-HRTimeline
BANK OF MONTREAL /CAN/in group BANK OF MONTREAL /CAN/56,310$124K<0.01%new13F-HRTimelineGroup
XTX Topco Ltdin group XTX Topco Ltd52,196$115K0.01%new13F-HRTimelineGroup
Bank of New York Mellon Corpin group Bank of New York Mellon Corp49,930$110K<0.01%013F-HRTimelineGroup
49 WEALTH MANAGEMENT, LLC49,670$109K0.02%+18,57113F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC44,128$97.1K<0.01%-2,08613F-HR/ATimelineGroup
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC41,343$91K<0.01%-9213F-HRTimelineGroup
ALLIANCEBERNSTEIN L.P.41,190$90.6K<0.01%013F-HRTimeline
Thrivent Financial for Lutheransin group Thrivent Financial for Luther…23,470$85K<0.01%013F-HRTimelineGroup
MARSHALL WACE, LLPin group MARSHALL WACE, LLP38,500$84.7K<0.01%new13F-HRTimelineGroup
RHUMBLINE ADVISERS36,278$79.8K<0.01%+1,53413F-HR/ATimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…35,624$78.4K<0.01%new13F-HRTimelineGroup
TWO SIGMA INVESTMENTS, LPgroup of 2 filers holding32,500$71.5KnewTimeline
CITIGROUP INCin group CITIGROUP INC27,847$61.3K<0.01%+7,17613F-HRTimelineGroup
STIFEL FINANCIAL CORPin group STIFEL FINANCIAL CORP23,509$51.7K<0.01%new13F-HRTimelineGroup
Concurrent Investment Advisors, LLCin group Concurrent Investment Advisor…23,470$51.6K<0.01%new13F-HRTimelineGroup
UBS Group AGin group UBS Group AG21,754$47.9K<0.01%+13,10513F-HRTimelineGroup
HSBC HOLDINGS PLCin group HSBC HOLDINGS PLC21,007$46.4K<0.01%+5,11213F-HRTimelineGroup
OCCUDO QUANTITATIVE STRATEGIES LP16,376$36K0.01%new13F-HRTimeline
PRUDENTIAL FINANCIAL INCin group PRUDENTIAL FINANCIAL INC15,405$33.9K<0.01%new13F-HRTimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN13,708$30.2K<0.01%+1,97013F-HRTimelineGroup
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…13,333$29.3K<0.01%+60813F-HRTimelineGroup
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…13,151$28.9K<0.01%+37313F-HRTimelineGroup
US BANCORP \DE\in group US BANCORP \DE\12,688$27.9K<0.01%+1,88813F-HRTimelineGroup
Corebridge Financial, Inc.in group Corebridge Financial, Inc.11,799$26K<0.01%-89113F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO11,747$25.8K<0.01%+80813F-HRTimelineGroup
Cresset Asset Management, LLC11,745$25.8K<0.01%013F-HRTimeline
INTECH INVESTMENT MANAGEMENT LLC10,885$23.9K<0.01%new13F-HRTimeline
IQ EQ FUND MANAGEMENT (IRELAND) Ltd10,604$23.3K<0.01%new13F-HRTimeline
SG Americas Securities, LLC10,520$23K<0.01%+17313F-HRTimeline
NEW YORK STATE COMMON RETIREMENT FUND8,487$18.7K<0.01%013F-HR/ATimeline
Allworth Financial LP5,269$14.8K<0.01%013F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS6,180$13.6K<0.01%new13F-HRTimelineGroup
SIMPLEX TRADING, LLC4,857$10K<0.01%+4,48813F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA2,795$6K<0.01%+65813F-HRTimelineGroup
FMR LLCin group FMR LLC2,494$5.49K<0.01%+1,06213F-HRTimelineGroup
Legal & General Group Plcin group Legal & General Group Plc1,821$4.01K<0.01%013F-HRTimelineGroup
CALIFORNIA STATE TEACHERS RETIREMENT SY…1,720$3.78K<0.01%013F-HR/ATimeline
HM PAYSON & CO1,500$3.3K<0.01%-1,00013F-HRTimeline
SIGNATUREFD, LLC1,447$3.18K<0.01%-1,15313F-HRTimeline
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…1,442$3.17K<0.01%013F-HRTimelineGroup
FEDERATED HERMES, INC.in group FEDERATED HERMES, INC.1,206$2.65K<0.01%new13F-HRTimelineGroup
CWM, LLCin group CWM, LLC1,086$2K<0.01%+89413F-HRTimelineGroup
AMALGAMATED BANK766$2K<0.01%013F-HRTimeline
Sterling Capital Management LLC745$1.64K<0.01%+67613F-HRTimeline
R Squared Ltd260$572<0.01%13F-HRTimeline
Zurcher Kantonalbank (Zurich Cantonalba…258$568<0.01%-2,08713F-HRTimeline
GPS Wealth Strategies Group, LLC200$440<0.01%013F-HRTimeline
NISA INVESTMENT ADVISORS, LLC149$328<0.01%+12113F-HRTimeline
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.125$275<0.01%-513F-HR/ATimelineGroup
CONCOURSE FINANCIAL GROUP SECURITIES, I…0$00%013F-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