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Disclosery

MASS 908 DEVICES INC

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Stock (common), issuer CIK 1555279

107 managers (107 13F filers) reported a position in MASS shares at 2025-09-30, 24,510,749 shares in all. 17 filers opened a position and 12 filers sold out during the quarter.

Managers
107
13F filers
107
New
17
Added
29
Reduced
40
Sold out
12
Shares held by filers
24,510,749

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, Q3 2025

Filers in the available 13F reports with a share position at 2025-09-30, 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
AWM Investment Company, Inc.5,199,924$45.6M4.27%013F-HRTimeline
First Light Asset Management, LLC2,510,496$22M2.07%+1,442,88313F-HRTimeline
STATE STREET CORPin group STATE STREET CORP2,298,648$20.1M<0.01%+11,51313F-HRTimelineGroup
ARK Investment Management LLCin group ARK Investment Management LLC1,953,772$17.1M0.1%-694,50613F-HRTimelineGroup
BlackRock, Inc.in group BlackRock, Inc.1,756,205$15.4M<0.01%-34,64013F-HRTimelineGroup
VANGUARD GROUP INCin group VANGUARD GROUP INC1,421,732$12.5M<0.01%-9,38313F-HRTimelineGroup
GM Advisory Group, LLC678,086$5.94M0.25%-487,20513F-HRTimeline
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC672,089$5.89M<0.01%+13,48613F-HRTimelineGroup
First Eagle Investment Management, LLCin group First Eagle Investment Manage…603,962$5.29M0.01%+336,58413F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY571,680$5.01M<0.01%+17,43513F-HR/ATimelineGroup
Tao Capital Management LP568,981$4.98M3.77%013F-HRTimeline
ESSEX INVESTMENT MANAGEMENT CO LLC493,949$4.33M0.66%+16,60713F-HRTimeline
MARSHALL WACE, LLPin group MARSHALL WACE, LLP439,639$3.85M<0.01%-209,15713F-HRTimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP324,788$2.84M<0.01%-38,21913F-HRTimelineGroup
Sumitomo Mitsui Trust Group, Inc.in group Sumitomo Mitsui Trust Group, …318,350$2.79M<0.01%-79,90613F-HRTimelineGroup
Amova Asset Management Americas, Inc.in group Amova Asset Management Americ…318,350$2.79M0.03%-76,02513F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/270,069$2.37M<0.01%-93,14813F-HR/ATimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co241,119$2.11M<0.01%+8,84613F-HRTimelineGroup
NEEDHAM INVESTMENT MANAGEMENT LLCin group NEEDHAM INVESTMENT MANAGEMENT…222,000$1.94M0.14%+72,00013F-HRTimelineGroup
RENAISSANCE TECHNOLOGIES LLC209,300$1.83M<0.01%+35,20013F-HRTimeline
NORTHERN TRUST CORPin group NORTHERN TRUST CORP208,032$1.82M<0.01%-3,01313F-HRTimelineGroup
Mitsubishi UFJ Asset Management Co., Lt…in group Mitsubishi UFJ Trust & Bankin…202,175$1.77M<0.01%-10,33913F-HRTimelineGroup
Prescott Group Capital Management, L.L.…190,005$1.66M0.18%013F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA184,219$1.61M<0.01%-7,10613F-HRTimelineGroup
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC183,282$1.61M<0.01%+176,61613F-HRTimelineGroup
Legato Capital Management LLC142,055$1.24M0.14%013F-HRTimeline
Squarepoint Ops LLCin group Squarepoint Ops LLC133,774$1.17M<0.01%new13F-HRTimelineGroup
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC105,179$921K<0.01%+10,18713F-HRTimelineGroup
Meros Investment Management, LP104,323$914K0.39%+34,85313F-HRTimeline
Schonfeld Strategic Advisors LLC103,025$902K0.01%-133,41313F-HRTimeline
Parkman Healthcare Partners LLC100,368$879K0.1%+36813F-HRTimeline
Nuveen, LLCin group TIAA99,988$876K<0.01%013F-HRTimelineGroup
BANK OF MONTREAL /CAN/in group BANK OF MONTREAL /CAN/90,852$796K<0.01%-10713F-HRTimelineGroup
Informed Momentum Co LLC86,595$759K0.09%+14,17913F-HRTimeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC79,690$698K<0.01%+10,41113F-HRTimelineGroup
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP72,327$634K<0.01%+1,33313F-HRTimelineGroup
Cassaday & Co Wealth Management LLC71,629$627K0.01%new13F-HRTimeline
LPL Financial LLC69,173$606K<0.01%-11,33013F-HRTimeline
Bruce & Co., Inc.68,286$598K0.19%013F-HRTimeline
Campbell & CO Investment Adviser LLC66,481$582K0.04%-42,20813F-HRTimeline
Bank of New York Mellon Corpin group Bank of New York Mellon Corp66,223$580K<0.01%+8,77913F-HRTimelineGroup
Granahan Investment Management, LLC64,338$564K0.02%new13F-HRTimeline
UBS Group AGin group UBS Group AG60,664$531K<0.01%-1,06213F-HRTimelineGroup
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC56,108$492K<0.01%-18813F-HRTimelineGroup
IQ EQ FUND MANAGEMENT (IRELAND) Ltd52,787$462K0.03%+14,60113F-HRTimeline
Cubist Systematic Strategies, LLC47,934$420K0.01%new13F-HRTimeline
ALLIANCEBERNSTEIN L.P.45,850$402K<0.01%-9,94013F-HRTimeline
XTX Topco Ltdin group XTX Topco Ltd45,036$395K0.02%new13F-HRTimelineGroup
Old Port Advisors38,629$338K0.09%-35,00013F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC38,585$338K<0.01%-11,17113F-HR/ATimelineGroup
FourThought Financial Partners, LLC37,334$327K0.03%new13F-HRTimeline
RHUMBLINE ADVISERS36,028$316K<0.01%-38813F-HRTimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC31,063$272K<0.01%-51,63613F-HRTimelineGroup
BRIDGEWAY CAPITAL MANAGEMENT, LLC30,500$267K0.01%013F-HRTimeline
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.25,603$224K<0.01%-160,61213F-HRTimelineGroup
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…23,778$208K<0.01%-18,68313F-HRTimelineGroup
Concurrent Investment Advisors, LLCin group Concurrent Investment Advisor…23,470$206K<0.01%013F-HRTimelineGroup
Trexquant Investment LP21,337$187K<0.01%new13F-HRTimeline
49 WEALTH MANAGEMENT, LLC19,188$168K0.02%013F-HRTimeline
Graham Capital Management, L.P.18,413$161K0.01%new13F-HRTimeline
Quantinno Capital Management LP18,140$159K<0.01%+3,44213F-HRTimeline
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN17,795$156K<0.01%+2,84413F-HRTimelineGroup
SG Americas Securities, LLC17,651$155K<0.01%-6,21313F-HRTimeline
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC16,878$147K<0.01%new13F-HRTimelineGroup
Cresset Asset Management, LLC15,666$137K<0.01%+3,92113F-HR/ATimeline
Invesco Ltd.in group Invesco Ltd.14,249$125K<0.01%-78,64713F-HRTimelineGroup
PRICE T ROWE ASSOCIATES INC /MD/13,827$122K<0.01%+1,41713F-HRTimeline
INTECH INVESTMENT MANAGEMENT LLC13,236$116K<0.01%-3,95113F-HRTimeline
AXQ CAPITAL, LP13,045$114K0.04%new13F-HRTimeline
STRS OHIO12,900$113K<0.01%new13F-HRTimeline
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…12,700$111K<0.01%-2,27713F-HRTimelineGroup
Brevan Howard Capital Management LPin group Brevan Howard Capital Managem…11,600$102K<0.01%new13F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO11,238$98.4K<0.01%-2,01013F-HR/ATimelineGroup
FMR LLCin group FMR LLC10,793$94.5K<0.01%+1613F-HRTimelineGroup
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…10,640$93.2K<0.01%new13F-HRTimelineGroup
MetLife Investment Management, LLCin group MetLife Investment Management…10,366$90.8K<0.01%-7,45513F-HRTimelineGroup
Police & Firemen's Retirement System of…8,523$74.7K<0.01%+2,90113F-HRTimeline
NEW YORK STATE COMMON RETIREMENT FUND8,487$74.3K<0.01%013F-HRTimeline
Daiwa Securities Group Inc.in group Daiwa Securities Group Inc.7,749$68K<0.01%-74113F-HRTimelineGroup
CWM, LLCin group CWM, LLC6,846$60K<0.01%-1,02913F-HRTimelineGroup
Allworth Financial LP5,449$47.7K<0.01%013F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS5,374$47.1K<0.01%-15,91613F-HRTimelineGroup
ANTIPODES PARTNERS Ltd5,227$45.8K<0.01%-1,33113F-HRTimeline
NISA INVESTMENT ADVISORS, LLC3,784$33.1K<0.01%013F-HRTimeline
Farther Finance Advisors, LLC3,233$28.3K<0.01%new13F-HRTimeline
Legal & General Group Plcin group Legal & General Group Plc2,918$25.6K<0.01%013F-HRTimelineGroup
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…2,795$24.5K<0.01%013F-HRTimelineGroup
CITIGROUP INCin group CITIGROUP INC2,260$19.8K<0.01%-8,64413F-HRTimelineGroup
CALIFORNIA STATE TEACHERS RETIREMENT SY…1,722$15.1K<0.01%+213F-HRTimeline
SIGNATUREFD, LLC1,447$12.7K<0.01%013F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…1,147$10K<0.01%-3,40113F-HRTimelineGroup
Versant Capital Management, Inc1,070$9.37K<0.01%013F-HRTimeline
AMALGAMATED BANK766$7K<0.01%013F-HRTimeline
GAMMA Investing LLC679$5.95K<0.01%+9513F-HRTimeline
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\534$4.68K<0.01%-20,67013F-HRTimelineGroup
Sterling Capital Management LLC493$4.32K<0.01%+26913F-HRTimeline
Optiver Holding B.V.in group Optiver Holding B.V.466$4.08K<0.01%new13F-HRTimelineGroup
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…375$3.29K<0.01%+19913F-HRTimelineGroup
Arax Advisory Partners278$2.44K<0.01%+3313F-HRTimeline
Essential Partners LLC218$1.91K<0.01%013F-HRTimeline
Rise Advisors, LLC207$1.81K<0.01%013F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…163$1.43K<0.01%-7413F-HRTimelineGroup
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.125$1.02K<0.01%013F-HRTimelineGroup
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP99$793<0.01%new13F-HRTimelineGroup
True Wealth Design, LLC44$386<0.01%013F-HRTimeline
Sunbelt Securities, Inc.22$193<0.01%new13F-HRTimeline
FNY Investment Advisers, LLC60$00%-3013F-HRTimelineValue 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