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Disclosery

QTRX QUANTERIX CORP

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COMMON STOCK (common), issuer CIK 1503274

124 managers (128 13F filers) reported a position in QTRX shares at 2026-03-31, 36,445,992 shares in all. 15 filers opened a position and 23 filers sold out during the quarter.

Managers
124
13F filers
128
New
15
Added
51
Reduced
36
Sold out
23
Shares held by filers
36,445,992

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, Q1 2026

Filers in the available 13F reports with a share position at 2026-03-31, 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
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC3,542,374$12.5M<0.01%-1,453,69913F-HR/ATimelineGroup
BlackRock, Inc.in group BlackRock, Inc.3,277,595$11.5M<0.01%-98,31513F-HRTimelineGroup
Portolan Capital Management, LLCin group Portolan Capital Management, …2,945,823$10.4M0.55%-1,579,73013F-HRTimelineGroup
VANGUARD GROUP INCgroup of 5 filers holding2,650,267$9.33M+2,637,095Timeline
Blue Water Life Science Advisors, LP2,142,147$7.54M6.05%+50,00013F-HRTimeline
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC2,083,699$7.33M0.02%+37,25013F-HRTimeline
Invenomic Capital Management LP1,932,386$6.8M0.31%+427,17813F-HRTimeline
LEVIN CAPITAL STRATEGIES, L.P.1,464,052$5.15M0.39%new13F-HRTimeline
First Eagle Investment Management, LLCin group First Eagle Investment Manage…1,300,087$4.58M0.01%+768,66013F-HR/ATimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC994,764$3.5M<0.01%-79,20313F-HRTimelineGroup
Trium Capital LLP994,217$3.5M2.54%+176,76613F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
STATE STREET CORPin group STATE STREET CORP898,277$3.16M<0.01%+4,87613F-HRTimelineGroup
Empire Financial Management Company, LLC736,068$2.59M0.59%+118,23813F-HRTimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC689,167$2.43M<0.01%+286,53613F-HRTimelineGroup
ENVESTNET ASSET MANAGEMENT INCin group ENVESTNET ASSET MANAGEMENT INC682,711$2.4M<0.01%+430,50013F-HRTimelineGroup
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…641,981$2.26M<0.01%+385,84113F-HRTimelineGroup
MARSHALL WACE, LLPin group MARSHALL WACE, LLP622,380$2.19M<0.01%+467,21113F-HRTimelineGroup
Williams Jones Wealth Management, LLC.613,439$2.16M0.03%-25,50013F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY607,856$2.14M<0.01%-215,14213F-HRTimelineGroup
Tikvah Management LLCin group Tikvah Management LLC571,619$2.01M0.62%013F-HRTimelineGroup
Topline Capital Management, LLC563,135$1.98M0.33%new13F-HRTimeline
Pier Capital, LLC492,368$1.73M0.29%new13F-HRTimeline
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP443,118$1.56M<0.01%+53,65213F-HRTimelineGroup
UBS Group AGgroup of 2 filers holding377,753$1.33M+65,783Timeline
NORTHERN TRUST CORPin group NORTHERN TRUST CORP349,658$1.23M<0.01%+4,09413F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co345,913$1.22M<0.01%-16,82713F-HRTimelineGroup
Parkman Healthcare Partners LLC341,453$1.2M0.12%+12,49713F-HRTimeline
TUDOR INVESTMENT CORP ET AL316,001$1.11M0.01%+146,30613F-HRTimeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC270,187$951K<0.01%+21,94513F-HRTimelineGroup
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA232,101$817K<0.01%+131,10013F-HRTimelineGroup
FMR LLCin group FMR LLC183,356$645K<0.01%+23,44913F-HRTimelineGroup
IRONWOOD INVESTMENT MANAGEMENT LLC169,825$598K0.25%-2,50513F-HRTimeline
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC155,655$548K<0.01%+86,27213F-HRTimelineGroup
RENAISSANCE TECHNOLOGIES LLC136,207$479K<0.01%+124,40713F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS134,403$473K<0.01%-34,02713F-HRTimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN129,024$454K<0.01%-33,66213F-HR/ATimelineGroup
Bank of New York Mellon Corpin group Bank of New York Mellon Corp126,363$445K<0.01%+2,84213F-HRTimelineGroup
Clearstead Advisors, LLC124,120$437K<0.01%+124,11513F-HRTimeline
SCS Capital Management LLC120,035$423K<0.01%013F-HRTimeline
Invesco Ltd.in group Invesco Ltd.116,216$409K<0.01%+3,01613F-HRTimelineGroup
XTX Topco Ltdin group XTX Topco Ltd111,660$393K0.01%+37,56713F-HRTimelineGroup
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC101,810$358K<0.01%-1,39813F-HRTimelineGroup
GSA CAPITAL PARTNERS LLP95,528$336K0.02%-25,99713F-HRTimeline
Point72 Asset Management, L.P.in group Point72 Asset Management, L.P.93,253$328K<0.01%new13F-HRTimelineGroup
Brevan Howard Capital Management LPin group Brevan Howard Capital Managem…87,386$308K<0.01%+70,58613F-HRTimelineGroup
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC84,132$296K<0.01%+18,61013F-HRTimelineGroup
STATE OF WISCONSIN INVESTMENT BOARD84,124$296K<0.01%-63,70013F-HRTimeline
ALLIANCEBERNSTEIN L.P.44,480$283K<0.01%013F-HRTimeline
Dynamic Technology Lab Private Ltd77,871$274K0.04%new13F-HRTimeline
Nuveen, LLCin group TIAA71,842$253K<0.01%+38713F-HRTimelineGroup
HRT FINANCIAL LP71,686$252K<0.01%+58,66813F-HRTimeline
PRICE T ROWE ASSOCIATES INC /MD/68,372$241K<0.01%+24,59413F-HRTimeline
BRIDGEWAY CAPITAL MANAGEMENT, LLC68,226$240K<0.01%+25,22613F-HRTimeline
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC61,001$215K<0.01%-37,57113F-HRTimelineGroup
PEDDOCK CAPITAL ADVISORS, LLC52,105$183K0.04%013F-HRTimeline
RHUMBLINE ADVISERS52,065$183K<0.01%-3,04913F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPgroup of 2 filers holding50,719$179K-108,069Timeline
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/49,552$174K<0.01%+7,00513F-HRTimelineGroup
PDT Partners, LLC47,668$168K0.01%013F-HRTimeline
Quantinno Capital Management LP47,594$168K<0.01%-16,19713F-HRTimeline
Schonfeld Strategic Advisors LLC42,786$151K<0.01%-18,93613F-HRTimeline
FOX RUN MANAGEMENT, L.L.C.39,592$136K0.02%new13F-HRTimeline
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\35,460$125K<0.01%+5,55413F-HRTimelineGroup
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP35,185$124K<0.01%-223,67313F-HRTimelineGroup
Jump Financial, LLCin group Jump Financial, LLC28,430$100K<0.01%-115,66513F-HRTimelineGroup
LPL Financial LLC25,681$90.4K<0.01%+80413F-HRTimeline
AXQ CAPITAL, LP24,354$85.7K0.01%+13,34513F-HRTimeline
Engineers Gate Manager LP23,800$83.8K<0.01%new13F-HRTimeline
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.22,816$80.3K<0.01%-40513F-HRTimelineGroup
MetLife Investment Management, LLCin group MetLife Investment Management…22,576$79.5K<0.01%+6,60913F-HRTimelineGroup
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…19,580$68.9K<0.01%-89613F-HRTimelineGroup
Virtu Financial LLCin group Virtu Financial LLC18,988$67K<0.01%-1,63813F-HRTimelineGroup
Allspring Global Investments Holdings, …in group Allspring Global Investments …17,216$60.6K<0.01%+1,65613F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO17,411$59.7K<0.01%-96,61013F-HR/ATimelineGroup
BARCLAYS PLCin group BARCLAYS PLC16,746$58.9K<0.01%-103,45713F-HRTimelineGroup
HUB Investment Partners, LLC13,661$48.1K<0.01%013F-HRTimeline
Post Resch Tallon Group Inc.12,500$45K0.04%+92513F-HRTimeline
INTECH INVESTMENT MANAGEMENT LLC11,666$41.1K<0.01%-7,39913F-HRTimeline
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …11,412$40.2K<0.01%-2,71613F-HRTimelineGroup
MERCER GLOBAL ADVISORS INC /ADV10,875$38.3K<0.01%new13F-HRTimeline
Police & Firemen's Retirement System of…10,062$35.4K<0.01%013F-HRTimeline
CWM, LLCin group CWM, LLC7,626$26.8K<0.01%+5,67413F-HRTimelineGroup
NEW YORK STATE COMMON RETIREMENT FUND6,501$22.9K<0.01%013F-HRTimeline
Legal & General Group Plcin group Legal & General Group Plc3,993$14.1K<0.01%013F-HRTimelineGroup
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…3,987$14K<0.01%+2,36713F-HRTimelineGroup
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…3,475$12.2K<0.01%013F-HRTimelineGroup
CALIFORNIA STATE TEACHERS RETIREMENT SY…2,389$8.41K<0.01%-32913F-HRTimeline
CITIGROUP INCin group CITIGROUP INC1,962$6.91K<0.01%-110,41813F-HRTimelineGroup
Versant Capital Management, Inc1,832$6.45K<0.01%+5413F-HRTimeline
Pinnacle Wealth Planning Services, Inc.1,799$6.33K<0.01%new13F-HRTimeline
Essential Partners LLC1,717$6.04K<0.01%+1,68813F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…1,573$5.54K<0.01%+40413F-HRTimelineGroup
Sterling Capital Management LLC1,275$4.49K<0.01%-1,04813F-HRTimeline
NewEdge Advisors, LLC1,000$3.52K<0.01%-10013F-HR/ATimeline
GROUP ONE TRADING LLC872$3.07K<0.01%new13F-HRTimeline
Wilmington Savings Fund Society, FSB800$2.82K<0.01%013F-HRTimeline
GAMMA Investing LLC690$2.43K<0.01%+11913F-HRTimeline
NATIONAL BANK OF CANADA /FI/in group NATIONAL BANK OF CANADA /FI/627$2.2K<0.01%+54213F-HRTimelineGroup
US BANCORP \DE\in group US BANCORP \DE\526$1.85K<0.01%-5,83113F-HRTimelineGroup
Pinnacle Bancorp, Inc.520$1.83K<0.01%013F-HRTimeline
Optiver Holding B.V.in group Optiver Holding B.V.445$1.57K<0.01%+10013F-HR/ATimelineGroup
LANARK FINANCIAL, INC.414$1.46K<0.01%+23513F-HRTimeline
SIGNATUREFD, LLC387$1.36K<0.01%013F-HRTimeline
SIT INVESTMENT ASSOCIATES INCin group SIT INVESTMENT ASSOCIATES INC272$1K<0.01%013F-HRTimelineGroup
Parallel Advisors, LLC270$950<0.01%new13F-HR/ATimeline
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…248$873<0.01%-1,26513F-HRTimelineGroup
LOS ANGELES CAPITAL MANAGEMENT LLC228$803<0.01%-34,75013F-HRTimeline
True Wealth Design, LLC151$532<0.01%013F-HRTimeline
Allworth Financial LP111$391<0.01%+5513F-HRTimeline
Fortitude Family Office, LLC106$373<0.01%new13F-HRTimeline
North Star Investment Management Corp.100$352<0.01%013F-HRTimeline
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP73$261<0.01%013F-HRTimelineGroup
SBI Securities Co., Ltd.62$218<0.01%013F-HRTimeline
Cypress Capital Management LLC (WY)60$211<0.01%013F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…55$193<0.01%-16813F-HR/ATimelineGroup
HUNTINGTON NATIONAL BANKin group HUNTINGTON NATIONAL BANK39$138<0.01%+3813F-HRTimelineGroup
Transamerica Financial Advisors, LLCin group Transamerica Financial Adviso…39$137<0.01%-52413F-HRTimelineGroup
STRS OHIO29$102<0.01%013F-HRTimeline
ROTHSCHILD INVESTMENT LLC21$74<0.01%+813F-HRTimeline
NORTHWESTERN MUTUAL WEALTH MANAGEMENT COin group NORTHWESTERN MUTUAL INVESTMEN…13$46<0.01%new13F-HRTimelineGroup
Advisory Services Network, LLC9$32<0.01%new13F-HRTimeline
IFP Advisors, Inc8$28<0.01%013F-HRTimeline
SJS Investment Consulting Inc.7$25<0.01%new13F-HRTimeline
Covestor Ltd10$00%013F-HRTimelineValue filed as zero, left out of ratios.