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Disclosery

QTRX QUANTERIX CORP

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COMMON STOCK (common), issuer CIK 1503274

126 managers (133 13F filers) reported a position in QTRX shares at 2026-06-30, 29,429,770 shares in all. 36 filers opened a position and 31 filers sold out during the quarter.

Managers
126
13F filers
133
New
36
Added
44
Reduced
30
Sold out
31
Shares held by filers
29,429,770

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, Q2 2026

Filers in the available 13F reports with a share position at 2026-06-30, 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
BlackRock, Inc.in group BlackRock, Inc.3,635,411$15.7M<0.01%+357,81613F-HRTimelineGroup
Blue Water Life Science Advisors, LP3,474,202$15M9.45%+1,332,05513F-HRTimeline
First Eagle Investment Management, LLCin group First Eagle Investment Manage…2,753,165$11.9M0.02%+1,453,07813F-HR/ATimelineGroup
VANGUARD GROUP INCgroup of 5 filers holding2,610,285$11.3M-39,982Timeline
Portolan Capital Management, LLCin group Portolan Capital Management, …1,899,308$8.21M0.31%-1,046,51513F-HRTimelineGroup
Lionhunter Capital Management, LLC1,500,427$6.48M2.92%13F-HRTimeline
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC1,343,005$5.8M<0.01%+1,258,87313F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC1,131,377$4.89M<0.01%+136,61313F-HRTimelineGroup
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC987,424$4.27M<0.01%-2,554,95013F-HRTimelineGroup
MARSHALL WACE, LLPin group MARSHALL WACE, LLP973,872$4.21M<0.01%+351,49213F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP932,307$4.03M<0.01%+34,03013F-HRTimelineGroup
Tikvah Management LLCin group Tikvah Management LLC571,555$2.47M0.75%-6413F-HRTimelineGroup
JACOBS LEVY EQUITY MANAGEMENT, INC487,600$2.11M0.01%new13F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY447,688$1.93M<0.01%-160,16813F-HRTimelineGroup
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC419,050$1.81M<0.01%+263,39513F-HRTimelineGroup
GSA CAPITAL PARTNERS LLP410,252$1.77M0.11%+314,72413F-HRTimeline
TUDOR INVESTMENT CORP ET AL400,402$1.73M0.01%+84,40113F-HRTimeline
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP397,833$1.72M<0.01%-45,28513F-HRTimelineGroup
SUSQUEHANNA INTERNATIONAL GROUP, LLPgroup of 3 filers holding356,199$1.54M+305,480Timeline
NORTHERN TRUST CORPin group NORTHERN TRUST CORP337,227$1.46M<0.01%-12,43113F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co310,701$1.34M<0.01%-35,21213F-HRTimelineGroup
UBS Group AGgroup of 2 filers holding282,749$1.22M-95,004Timeline
Nuveen, LLCin group TIAA232,592$1M<0.01%+160,75013F-HRTimelineGroup
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC229,736$992K<0.01%+168,73513F-HRTimelineGroup
XTX Topco Ltdin group XTX Topco Ltd228,035$985K0.01%+116,37513F-HRTimelineGroup
Point72 Asset Management, L.P.in group Point72 Asset Management, L.P.225,653$975K<0.01%+132,40013F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC212,056$916K<0.01%-58,13113F-HRTimelineGroup
FMR LLCin group FMR LLC210,634$910K<0.01%+27,27813F-HRTimelineGroup
IRONWOOD INVESTMENT MANAGEMENT LLC170,555$737K0.25%+73013F-HRTimeline
Invesco Ltd.in group Invesco Ltd.160,887$695K<0.01%+44,67113F-HRTimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN149,158$644K<0.01%+20,13413F-HRTimelineGroup
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS136,876$591K<0.01%+2,47313F-HRTimelineGroup
Bank of New York Mellon Corpin group Bank of New York Mellon Corp131,900$570K<0.01%+5,53713F-HRTimelineGroup
SCS Capital Management LLC120,035$519K<0.01%013F-HRTimeline
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC100,463$434K<0.01%-1,34713F-HRTimelineGroup
PRICE T ROWE ASSOCIATES INC /MD/95,626$414K<0.01%+27,25413F-HRTimeline
Quadrature Capital Ltdin group Quadrature Capital Ltd80,200$346K<0.01%new13F-HRTimelineGroup
Cerity Partners LLCin group Cerity Partners LLC78,083$337K<0.01%new13F-HRTimelineGroup
BRIDGEWAY CAPITAL MANAGEMENT, LLC68,226$295K0.01%013F-HRTimeline
Clearstead Advisors, LLC62,261$269K<0.01%-61,85913F-HRTimeline
Jain Global LLC57,319$248K<0.01%new13F-HRTimeline
ALGERT GLOBAL LLC55,217$239K<0.01%new13F-HRTimeline
RHUMBLINE ADVISERS53,557$231K<0.01%+1,49213F-HRTimeline
PEDDOCK CAPITAL ADVISORS, LLC52,105$225K0.04%013F-HRTimeline
ALLIANCEBERNSTEIN L.P.56,780$200K<0.01%+12,30013F-HRTimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC40,662$176K<0.01%-648,50513F-HRTimelineGroup
CANADA PENSION PLAN INVESTMENT BOARD38,100$165K<0.01%new13F-HRTimeline
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…37,722$163K<0.01%-604,25913F-HRTimelineGroup
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\36,678$158K<0.01%+1,21813F-HRTimelineGroup
IEQ CAPITAL, LLC35,507$153K<0.01%new13F-HRTimeline
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/29,286$127K<0.01%-20,26613F-HRTimelineGroup
MERCER GLOBAL ADVISORS INC /ADV25,731$111K<0.01%+14,85613F-HR/ATimeline
AXQ CAPITAL, LP25,599$111K0.01%+1,24513F-HRTimeline
MetLife Investment Management, LLCin group MetLife Investment Management…24,801$107K<0.01%+2,22513F-HRTimelineGroup
Aigen Investment Management, LP24,328$105K0.03%new13F-HRTimeline
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.24,176$104K<0.01%+1,36013F-HRTimelineGroup
WEALTH ENHANCEMENT ADVISORY SERVICES, L…26,914$104K<0.01%new13F-HRTimeline
Dynamic Technology Lab Private Ltd20,816$90K0.02%-57,05513F-HRTimeline
LPL Financial LLC20,099$86.8K<0.01%-5,58213F-HRTimeline
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO19,049$86.5K<0.01%+1,63813F-HRTimelineGroup
CITIGROUP INCin group CITIGROUP INC19,713$85.2K<0.01%+17,75113F-HRTimelineGroup
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…19,655$84.9K<0.01%+7513F-HRTimelineGroup
Creative Planningin group Creative Planning18,538$80.1K<0.01%new13F-HRTimelineGroup
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.17,672$76.3K<0.01%new13F-HRTimelineGroup
NISA INVESTMENT ADVISORS, LLC17,356$75K<0.01%new13F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC15,805$68.3K<0.01%-94113F-HRTimelineGroup
HUB Investment Partners, LLC15,734$68K<0.01%+2,07313F-HRTimeline
Mariner, LLCin group Mariner, LLC15,471$66.8K<0.01%new13F-HRTimelineGroup
Engineers Gate Manager LP14,807$64K<0.01%-8,99313F-HRTimeline
Jump Financial, LLCin group Jump Financial, LLC14,700$63.5K<0.01%-13,73013F-HRTimelineGroup
CAPTRUST FINANCIAL ADVISORS14,301$61.8K<0.01%new13F-HRTimeline
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …13,788$59.6K<0.01%+2,37613F-HRTimelineGroup
HighTower Advisors, LLC13,660$59K<0.01%new13F-HRTimeline
PharVision Advisers, LLC13,039$56.3K1.06%new13F-HRTimeline
Schonfeld Strategic Advisors LLC12,663$54.7K<0.01%-30,12313F-HRTimeline
Post Resch Tallon Group Inc.12,500$54K0.04%013F-HRTimeline
Qube Research & Technologies Ltd11,987$51.8K<0.01%new13F-HRTimeline
KESTRA PRIVATE WEALTH SERVICES, LLCin group Kestra Advisory Services, LLC11,294$48.8K<0.01%new13F-HRTimelineGroup
IMC-Chicago, LLC10,214$44.1K<0.01%new13F-HRTimeline
Police & Firemen's Retirement System of…10,062$43.5K<0.01%013F-HRTimeline
Cresset Asset Management, LLC10,000$43.2K<0.01%new13F-HRTimeline
Arax Advisory Partners7,558$32.7K<0.01%new13F-HRTimeline
Integrated Wealth Concepts LLC7,224$31.2K<0.01%new13F-HRTimeline
SIMPLEX TRADING, LLC7,127$30.8K<0.01%new13F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…7,123$30.8K<0.01%+5,55013F-HRTimelineGroup
NEW YORK STATE COMMON RETIREMENT FUND6,501$28.1K<0.01%013F-HRTimeline
Legal & General Group Plcin group Legal & General Group Plc3,993$17.3K<0.01%013F-HRTimelineGroup
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…3,475$15K<0.01%013F-HRTimelineGroup
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…3,108$13.4K<0.01%-87913F-HRTimelineGroup
Sachetta, LLC3,000$13K0.01%new13F-HRTimeline
Allworth Financial LP2,143$9.26K<0.01%+2,03213F-HRTimeline
GROUP ONE TRADING LLC1,933$8.35K<0.01%+1,06113F-HRTimeline
Pinnacle Wealth Planning Services, Inc.1,799$7.77K<0.01%013F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA1,475$7K<0.01%-230,62613F-HRTimelineGroup
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…1,503$6.49K<0.01%+1,44813F-HRTimelineGroup
True Wealth Design, LLC1,068$4.61K<0.01%+91713F-HRTimeline
NewEdge Advisors, LLC1,000$4.32K<0.01%013F-HRTimeline
Sterling Capital Management LLC860$3.71K<0.01%-41513F-HRTimeline
Wilmington Savings Fund Society, FSB800$3.46K<0.01%013F-HRTimeline
Essential Partners LLC640$2.77K<0.01%-1,07713F-HRTimeline
MassMutual Private Wealth & Trust, FSB600$2.59K<0.01%new13F-HRTimeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…585$2.53K<0.01%-1,80413F-HR/ATimeline
Pinnacle Bancorp, Inc.520$2.25K<0.01%013F-HRTimeline
GAMMA Investing LLC299$1.29K<0.01%-39113F-HRTimeline
Farther Finance Advisors, LLC249$1.08K<0.01%new13F-HRTimeline
SIT INVESTMENT ASSOCIATES INCin group SIT INVESTMENT ASSOCIATES INC272$1K<0.01%013F-HRTimelineGroup
ROTHSCHILD INVESTMENT LLC207$894<0.01%+18613F-HRTimeline
US BANCORP \DE\in group US BANCORP \DE\202$873<0.01%-32413F-HRTimelineGroup
Fortitude Family Office, LLC201$868<0.01%+9513F-HRTimeline
Physician Wealth Advisors, Inc.198$856<0.01%new13F-HRTimeline
Bare Financial Services, Inc184$795<0.01%new13F-HRTimeline
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…175$756<0.01%-7313F-HRTimelineGroup
Wealth Enhancement Trust Services, Inc.161$696<0.01%new13F-HR/ATimeline
Bogart Wealth, LLC156$674<0.01%new13F-HRTimeline
Ritter Daniher Financial Advisory LLC /…150$648<0.01%new13F-HRTimeline
Optiver Holding B.V.in group Optiver Holding B.V.101$436<0.01%-34413F-HRTimelineGroup
North Star Investment Management Corp.100$432<0.01%013F-HRTimeline
Concord Wealth Partnersin group Concord Wealth Partners100$432<0.01%new13F-HRTimelineGroup
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP73$315<0.01%013F-HRTimelineGroup
SBI Securities Co., Ltd.62$268<0.01%013F-HRTimeline
SJS Investment Consulting Inc.60$260<0.01%+5313F-HRTimeline
Cypress Capital Management LLC (WY)60$259<0.01%013F-HRTimeline
HUNTINGTON NATIONAL BANKin group HUNTINGTON NATIONAL BANK39$168<0.01%013F-HRTimelineGroup
Transamerica Financial Advisors, LLCin group Transamerica Financial Adviso…39$168<0.01%013F-HRTimelineGroup
STRS OHIO29$125<0.01%013F-HRTimeline
Avion Wealth198$00%new13F-HRTimelineValue filed as zero, left out of ratios.