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Disclosery

QTRX QUANTERIX CORP

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COMMON STOCK (common), issuer CIK 1503274

126 managers (129 13F filers) reported a position in QTRX shares at 2025-09-30, 35,671,877 shares in all. 19 filers opened a position and 26 filers sold out during the quarter.

Managers
126
13F filers
129
New
19
Added
47
Reduced
36
Sold out
26
Shares held by filers
35,671,877

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, 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
Portolan Capital Management, LLCin group Portolan Capital Management, …4,259,851$23.1M1.25%+626,22913F-HRTimelineGroup
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC4,243,512$23M0.01%+6,63513F-HRTimelineGroup
BlackRock, Inc.in group BlackRock, Inc.3,112,980$16.9M<0.01%+188,28113F-HRTimelineGroup
VANGUARD GROUP INCgroup of 2 filers holding2,660,523$14.4M+116,549Timeline
Invenomic Capital Management LP1,393,005$7.56M0.4%+248,10113F-HRTimeline
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC1,315,280$7.14M0.02%+187,29913F-HRTimeline
EASTERLY INVESTMENT PARTNERS LLC1,252,184$6.8M0.46%+168,54913F-HRTimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC1,209,199$6.57M0.01%+1,197,08313F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC1,011,890$5.5M<0.01%+124,81013F-HRTimelineGroup
Kent Lake PR LLC1,001,000$5.44M2.78%-1,300,00013F-HRTimeline
Blue Water Life Science Advisors, LP957,747$5.2M4.74%013F-HRTimeline
STATE STREET CORPin group STATE STREET CORP819,534$4.45M<0.01%+54,67913F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY806,263$4.38M<0.01%+34,82313F-HR/ATimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP707,071$3.84M<0.01%-96,66413F-HRTimelineGroup
Trium Capital LLP688,597$3.74M1.47%+102,17213F-HRTimeline
Williams Jones Wealth Management, LLC.686,464$3.73M0.04%+10,45013F-HRTimeline
MARSHALL WACE, LLPin group MARSHALL WACE, LLP608,708$3.31M<0.01%+164,51713F-HRTimelineGroup
Tikvah Management LLCin group Tikvah Management LLC571,619$3.1M0.92%013F-HRTimelineGroup
Aberdeen Group plcin group Aberdeen Group plc564,581$3.07M<0.01%+143,72513F-HRTimelineGroup
ENVESTNET ASSET MANAGEMENT INCin group ENVESTNET ASSET MANAGEMENT INC515,861$2.8M<0.01%+284,26013F-HRTimelineGroup
Empire Financial Management Company, LLC452,430$2.46M0.56%+328,45013F-HRTimeline
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…434,060$2.36M<0.01%+9,40113F-HRTimelineGroup
TWO SIGMA INVESTMENTS, LPgroup of 2 filers holding392,264$2.13M+13,127Timeline
UBS Group AGin group UBS Group AG373,600$2.03M<0.01%-11,35113F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP353,658$1.92M<0.01%+32,62813F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co331,246$1.8M<0.01%+32,25713F-HRTimelineGroup
Cubist Systematic Strategies, LLC314,418$1.71M0.02%+196,37513F-HRTimeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC278,075$1.51M<0.01%+24,25513F-HRTimelineGroup
Parkman Healthcare Partners LLC252,211$1.37M0.15%-263,78113F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA247,678$1.34M<0.01%+25,98413F-HRTimelineGroup
SUSQUEHANNA INTERNATIONAL GROUP, LLPgroup of 2 filers holding239,638$1.3M+16,780Timeline
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO227,771$1.24M<0.01%-32,73013F-HR/ATimelineGroup
CITIGROUP INCin group CITIGROUP INC218,578$1.19M<0.01%-62,00013F-HRTimelineGroup
STATE OF WISCONSIN INVESTMENT BOARD195,759$1.06M<0.01%-94,00013F-HRTimeline
IRONWOOD INVESTMENT MANAGEMENT LLC194,074$1.05M0.46%+172,77713F-HRTimeline
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC157,975$858K<0.01%+69,71613F-HRTimelineGroup
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS150,327$816K<0.01%+115,91713F-HRTimelineGroup
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC149,779$813K<0.01%+9,81513F-HRTimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN144,318$784K<0.01%+5,58113F-HRTimelineGroup
Schonfeld Strategic Advisors LLC136,575$742K0.01%-189,10213F-HRTimeline
SCS Capital Management LLC120,035$652K0.01%-234,30413F-HRTimeline
Jump Financial, LLCin group Jump Financial, LLC118,352$643K0.01%-8,28913F-HR/ATimelineGroup
Bank of New York Mellon Corpin group Bank of New York Mellon Corp117,538$638K<0.01%+5,58513F-HRTimelineGroup
FMR LLCin group FMR LLC117,133$636K<0.01%-9,49913F-HRTimelineGroup
PARAGON ASSOCIATES & PARAGON ASSOCIATES…100,671$547K0.97%new13F-HRTimeline
Invesco Ltd.in group Invesco Ltd.98,692$536K<0.01%+23,49613F-HRTimelineGroup
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC97,597$530K<0.01%+11,38213F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/88,366$480K<0.01%+26,56513F-HR/ATimelineGroup
Numerai GP LLC88,064$478K0.07%new13F-HRTimeline
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC83,181$452K<0.01%new13F-HRTimelineGroup
Nuveen, LLCin group TIAA71,455$388K<0.01%013F-HRTimelineGroup
BARCLAYS PLCin group BARCLAYS PLC67,269$365K<0.01%-11,71113F-HR/ATimelineGroup
Clarius Group, LLC62,060$337K0.02%013F-HRTimeline
Mount Lucas Management LP60,000$326K0.15%013F-HRTimeline
PRICE T ROWE ASSOCIATES INC /MD/58,778$320K<0.01%+19,17913F-HRTimeline
RHUMBLINE ADVISERS57,057$310K<0.01%-3,57213F-HRTimeline
PEDDOCK CAPITAL ADVISORS, LLC52,105$283K0.06%+34,50313F-HRTimeline
PDT Partners, LLC47,668$259K0.02%013F-HRTimeline
ALLIANCEBERNSTEIN L.P.44,480$242K<0.01%013F-HRTimeline
BRIDGEWAY CAPITAL MANAGEMENT, LLC43,000$233K<0.01%new13F-HRTimeline
PharVision Advisers, LLC36,144$196K0.11%new13F-HRTimeline
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\28,089$153K<0.01%+3,76813F-HRTimelineGroup
Quantinno Capital Management LP27,510$149K<0.01%-14,45413F-HRTimeline
Brevan Howard Capital Management LPin group Brevan Howard Capital Managem…23,244$126K<0.01%+8,73913F-HRTimelineGroup
MetLife Investment Management, LLCin group MetLife Investment Management…22,942$125K<0.01%-88813F-HRTimelineGroup
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.24,736$113K<0.01%+4,23713F-HRTimelineGroup
Atom Investors LP19,571$106K0.01%new13F-HRTimeline
INTECH INVESTMENT MANAGEMENT LLC19,161$104K<0.01%+2,26813F-HRTimeline
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…19,109$104K<0.01%-1,33513F-HRTimelineGroup
COMMONWEALTH EQUITY SERVICES, LLC17,465$95K<0.01%-45013F-HRTimeline
Jain Global LLC17,377$94.4K<0.01%new13F-HRTimeline
PRELUDE CAPITAL MANAGEMENT, LLC15,393$83.6K0.01%-1,49113F-HRTimeline
DekaBank Deutsche Girozentrale4,566$79K<0.01%013F-HRTimeline
State of Wyoming14,109$76.6K0.01%-70513F-HRTimeline
Allspring Global Investments Holdings, …in group Allspring Global Investments …14,103$76.6K<0.01%-13913F-HRTimelineGroup
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …13,801$74.9K<0.01%+23013F-HRTimelineGroup
HUB Investment Partners, LLC12,161$66K<0.01%013F-HRTimeline
Post Resch Tallon Group Inc.12,075$65.6K0.06%-10013F-HRTimeline
R Squared Ltd11,771$63.9K0.03%new13F-HRTimeline
XTX Topco Ltdin group XTX Topco Ltd11,310$61.4K<0.01%-44,71413F-HRTimelineGroup
KESTRA PRIVATE WEALTH SERVICES, LLCin group Kestra Advisory Services, LLC10,294$55.9K<0.01%+18513F-HRTimelineGroup
HSBC HOLDINGS PLCin group HSBC HOLDINGS PLC10,516$55.8K<0.01%-19,43313F-HRTimelineGroup
Police & Firemen's Retirement System of…10,062$54.6K<0.01%013F-HRTimeline
Quantbot Technologies LP8,673$47.1K<0.01%-23,19113F-HRTimeline
NEW YORK STATE COMMON RETIREMENT FUND6,501$35.3K<0.01%013F-HRTimeline
Quarry LP5,548$30.1K0.01%+5,54613F-HRTimeline
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…3,475$18.9K<0.01%013F-HRTimelineGroup
Legal & General Group Plcin group Legal & General Group Plc3,307$18K<0.01%013F-HRTimelineGroup
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…3,028$16.4K<0.01%-2,24513F-HRTimelineGroup
Sterling Capital Management LLC2,579$14K<0.01%+1,70513F-HRTimeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…2,538$13.8K<0.01%-6513F-HRTimeline
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…2,463$13.4K<0.01%new13F-HRTimelineGroup
SIMPLEX TRADING, LLC1,563$8K<0.01%-1,58913F-HRTimeline
Versant Capital Management, Inc1,421$7.72K<0.01%-6,97613F-HRTimeline
CWM, LLCin group CWM, LLC1,294$7K<0.01%-1,53213F-HRTimelineGroup
AMALGAMATED BANK1,189$6K<0.01%013F-HRTimeline
NewEdge Advisors, LLC1,100$5.97K<0.01%013F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…934$5.07K<0.01%-29913F-HRTimelineGroup
Wilmington Savings Fund Society, FSB800$4.34K<0.01%013F-HR/ATimeline
GROUP ONE TRADING LLC783$4.25K<0.01%new13F-HRTimeline
Optiver Holding B.V.in group Optiver Holding B.V.729$3.96K<0.01%new13F-HRTimelineGroup
NISA INVESTMENT ADVISORS, LLC640$3.48K<0.01%-2,70913F-HRTimeline
Transamerica Financial Advisors, LLCin group Transamerica Financial Adviso…563$3.06K<0.01%new13F-HRTimelineGroup
Pinnacle Bancorp, Inc.520$2.82K<0.01%013F-HRTimeline
Arax Advisory Partners419$2.27K<0.01%-37413F-HRTimeline
AlphaQuest LLC336$1.82K<0.01%013F-HRTimeline
LANARK FINANCIAL, INC.281$1.52K<0.01%-1313F-HRTimeline
Fortitude Family Office, LLC270$1.47K<0.01%013F-HRTimeline
SIT INVESTMENT ASSOCIATES INCin group SIT INVESTMENT ASSOCIATES INC272$1K<0.01%new13F-HRTimelineGroup
GAMMA Investing LLC169$918<0.01%+713F-HRTimeline
True Wealth Design, LLC151$820<0.01%013F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…137$744<0.01%-9413F-HRTimelineGroup
Clearstead Advisors, LLC132$717<0.01%new13F-HRTimeline
Point72 (DIFC) Ltd119$646<0.01%new13F-HRTimeline
North Star Investment Management Corp.100$543<0.01%new13F-HRTimeline
Concord Wealth Partnersin group Concord Wealth Partners100$543<0.01%013F-HRTimelineGroup
Rialto Wealth Management, LLC96$522<0.01%013F-HRTimeline
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP73$379<0.01%new13F-HRTimelineGroup
SBI Securities Co., Ltd.62$337<0.01%013F-HRTimeline
Cypress Capital Management LLC (WY)60$326<0.01%013F-HRTimeline
Allworth Financial LP48$261<0.01%new13F-HRTimeline
US BANCORP \DE\in group US BANCORP \DE\39$212<0.01%013F-HRTimelineGroup
STRS OHIO29$157<0.01%new13F-HRTimeline
IFP Advisors, Inc12$65<0.01%+1213F-HR/ATimeline
HUNTINGTON NATIONAL BANKin group HUNTINGTON NATIONAL BANK1$5<0.01%013F-HRTimelineGroup
Covestor Ltd10$00%013F-HRTimelineValue filed as zero, left out of ratios.