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QTRX · Quanterix Corp · Holdings

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$3.15 +0.03 (+0.80%) Q2 2026 earnings call transcript
Russell 2000 member Rebalance outlook locked
Market Cap
$147.55M
Shares
47.29M
Volume · Oct 29 334.18K Avg daily vol (3M) 745.9K

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Use institutional holdings through the 13F API or MCP → See every holder of QTRX: 13F, 13D and 13G, insiders and funds →
The Sep 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out. Each fund's Change is measured against its own previous reported quarter, shown in the Reported column. Pick a completed quarter in the Quarter selector below to put every fund on one quarter and see the stock-wide activity breakdown.
Holders: 132
Total Value: $128,279,972
Total Shares: 29,709,950
Showing 1–100 of 134 holdings by value · page 1 of 2

Institutional Ownership Trend

27 quarters

Holder Concentration

Across 133 13F filers
Top Holder
12.2%
Sep 2023 → Jun 2026 · range 9.0% – 14.2%
of institutional value
Top 5
45.6%
Sep 2023 → Jun 2026 · range 30.2% – 50.3%
of institutional value
Top 10
65.6%
Sep 2023 → Jun 2026 · range 46.1% – 68.3%
of institutional value
HHI
572
Sep 2023 → Jun 2026 · range 326 – 659
Broadly held

Who Holds QTRX

Last 8 quarters through Sep 30, 2026 (filing window open)

Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.

Jun 30, 2026, the newest closed quarter: 132 filers, like-for-like change -23.4%; actively managed books -32.6%; index-like books +5.8%.

Holder type Share Filers Change
Registered adviser 54.8% 63 -20.4%
Exempt adviser 3.4% 2 +38.9%
Adviser 3.9% 3 -78.0%
Bank 6.5% 12 -12.5%
Broker-dealer 0.1% 2 -17.0%
Benefit plan 0.0% 2 -99.3%
Non-US 0.8% 5 +24.4%
Holding company 15.4% 5 +3.4%
Insurer 0.0% 0 —
Unknown 15.2% 38 -15.2%

The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.

How the mix is measured

Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.

Excluded 1 holder with no observed 2026-03-31 13F and 1 holder with no observed 2026-06-30 13F.

Conviction and Crowding

132 13F filers, quarter ended Jun 30, 2026

Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.

Conviction holders
2
1.52% of filers hold it in their top 10
Mar 31, 2026: 2
Holders above 5%
1
median weight 0.000%
Mar 31, 2026: 1
Crowding
30.8%
of shares outstanding, 82nd percentile
Mar 31, 2026: 40.8%
Private-fund advisers
25.0%
of shares outstanding
Institutional ownership
62.5%
67.7% of the estimated free float
Top 10 holders
66.3%
of 13F shares, Herfindahl 0.058
Active holders
-32.6%
like-for-like share change of active filers
5% stakes on record
4
0 13D, 4 13G (3 institutional, 1 passive, 0 exempt)
How long holders have held it value-weighted 11.3 quarters
Under 1 year 31.5% 1 to 3 years 32.3% 3 years or more 36.2% Since coverage start 0.000%

Managers in the top fifth by current three-year FundScore alpha were net buyers of $2,493,719 (1 buying, 1 selling).

Estimated Holder Cost Basis

Quarter ended Jun 30, 2026, on that quarter's share basis

Estimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.

Estimated avg cost
$6.14
estimated per share
Mar 31, 2026: $8.08
Quarter-end price
$4.32
implied by 13F values
Estimated gain or loss
-29.7%
price against the estimated cost
Estimated at a loss
76.8%
of costed 13F value

Estimated cost covers 51.0% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.

Shared Holders

Companies QTRX's active holders also own, quarter ended Jun 30, 2026
# Company Shared holders
1 PFE Pfizer Inc 3
2 GE General Electric Co 3
3 GEV GE Vernova Inc. 3
4 IBM International Business Machines Corp 3
5 GOOGL Alphabet Inc. 4
6 AMZN Amazon Com Inc 3
7 MSFT Microsoft Corp 3

Shareholder Targets

13F filers that own its peers but not QTRX, quarter ended Jun 30, 2026

Found through its holder-overlap peers: PFE, GE, GEV, IBM, GOOGL, AMZN, MSFT. 6,893 filers in all.

# Filer In peers
1 NORGES BANK Non-US, Index-like $140,153,341,089 7 held
2 Capital Research Global Investors Adviser, Diversified active $115,025,771,616 5 held
3 Capital World Investors Adviser, Diversified active $96,365,055,296 7 held
4 Capital International Investors Adviser, Diversified active $62,982,483,997 5 held
5 WELLINGTON MANAGEMENT GROUP LLP Holding company, Diversified active $58,361,051,798 7 held
6 Amundi Holding company, Index-like $56,921,160,954 7 held
7 FRANKLIN RESOURCES INC Adviser, Diversified active $51,691,631,929 7 held
8 Fisher Asset Management, LLC Adviser, Diversified active $44,297,595,632 7 held
9 Berkshire Hathaway Inc Insurer, Concentrated $37,764,088,381 1 held
10 JENNISON ASSOCIATES LLC Registered adviser, Diversified active $31,645,557,972 6 held

Fund Ownership of QTRX by Fund Type

Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026

Index funds and index ETFs hold 12.53% of shares outstanding.

Fund type Of shares outstanding Shares
Index funds 3.07% 1,452,106
Index ETFs 9.46% 4,474,583
Active ETFs 0.43% 201,512
Active funds 11.57% 5,473,942
Unclassified 0.21% 101,372
All registered funds 24.75% 11,703,515
How fund types are measured

Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.

Holder type: Registered adviser 66 Exempt adviser 2 Adviser 3 Bank 12 Broker-dealer 2 Benefit plan 2 Non-US 5 Holding company 5 Unknown 35
Showing 100 of 134
All Common Calls Puts
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Holder Value (USD) % of 13F Shares Open
BlackRock, Inc. $15,704,971 12.24% 3,635,411
Blue Water Life Science Advisors, LP $15,008,552 11.70% 3,474,202
First Eagle Investment Management, LLC $11,893,672 9.27% 2,753,165
Portolan Capital Management, LLC $8,205,010 6.40% 1,899,308
VANGUARD CAPITAL MANAGEMENT LLC $7,778,782 6.06% 1,800,644
Lionhunter Capital Management, LLC $6,481,844 5.05% 1,500,427
AQR CAPITAL MANAGEMENT LLC $5,801,779 4.52% 1,343,005
GEODE CAPITAL MANAGEMENT, LLC $4,887,547 3.81% 1,131,377
AMERIPRISE FINANCIAL INC $4,265,671 3.33% 987,424
MARSHALL WACE, LLP $4,207,126 3.28% 973,872
STATE STREET CORP $4,027,566 3.14% 932,307
Tikvah Management LLC $2,469,117 1.92% 571,555
VANGUARD PORTFOLIO MANAGEMENT LLC $2,114,925 1.65% 489,566
JACOBS LEVY EQUITY MANAGEMENT, INC $2,106,432 1.64% 487,600
MORGAN STANLEY $1,934,008 1.51% 447,688
JANE STREET GROUP, LLC $1,810,295 1.41% 419,050
GSA CAPITAL PARTNERS LLP $1,772,288 1.38% 410,252
TUDOR INVESTMENT CORP ET AL $1,729,736 1.35% 400,402
DIMENSIONAL FUND ADVISORS LP $1,718,637 1.34% 397,833
NORTHERN TRUST CORP $1,456,819 1.14% 337,227
CHARLES SCHWAB INVESTMENT MANAGEMENT INC $1,342,228 1.05% 310,701
VANGUARD FIDUCIARY TRUST CO $1,245,503 0.97% 288,311
UBS Group AG $1,218,144 0.95% 281,978
Balyasny Asset Management L.P. $1,123,200 0.88% 260,000
Nuveen, LLC $1,004,796 0.78% 232,592
CITADEL ADVISORS LLC $992,459 0.77% 229,736
XTX Topco Ltd $985,111 0.77% 228,035
Point72 Asset Management, L.P. $974,820 0.76% 225,653
GOLDMAN SACHS GROUP INC $916,081 0.71% 212,056
FMR LLC $909,938 0.71% 210,634
IRONWOOD INVESTMENT MANAGEMENT LLC $736,797 0.57% 170,555
SUSQUEHANNA INTERNATIONAL GROUP, LLP $728,437 0.57% 168,620
Invesco Ltd. $695,030 0.54% 160,887
WELLS FARGO & COMPANY/MN $644,362 0.50% 149,158
Susquehanna Portfolio Strategies, LLC $642,029 0.50% 148,618
BNP PARIBAS ARBITRAGE, SA $591,304 0.46% 136,876
Bank of New York Mellon Corp $569,805 0.44% 131,900
SCS Capital Management LLC $518,551 0.40% 120,035
AMERICAN CENTURY COMPANIES INC $434,000 0.34% 100,463
PRICE T ROWE ASSOCIATES INC /MD/ $413,104 0.32% 95,626
Quadrature Capital Ltd $346,464 0.27% 80,200
Cerity Partners LLC $337,317 0.26% 78,083
BRIDGEWAY CAPITAL MANAGEMENT, LLC $294,736 0.23% 68,226
Clearstead Advisors, LLC $268,967 0.21% 62,261
Jain Global LLC $247,618 0.19% 57,319
ALLIANCEBERNSTEIN L.P. $245,289 0.19% 56,780
ALGERT GLOBAL LLC $238,537 0.19% 55,217
RHUMBLINE ADVISERS $231,366 0.18% 53,557
PEDDOCK CAPITAL ADVISORS, LLC $193,309 0.15% 52,105
MILLENNIUM MANAGEMENT LLC $175,659 0.14% 40,662
SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC $168,311 0.13% 38,961
CANADA PENSION PLAN INVESTMENT BOARD $164,592 0.13% 38,100
Russell Investments Group, Ltd. $162,957 0.13% 37,722
DEUTSCHE BANK AG\ $158,448 0.12% 36,678
IEQ CAPITAL, LLC $153,390 0.12% 35,507
BANK OF AMERICA CORP /DE/ $126,515 0.10% 29,286
MERCER GLOBAL ADVISORS INC /ADV $111,157 0.09% 25,731
AXQ CAPITAL, LP $110,587 0.09% 25,599
MetLife Investment Management, LLC $107,140 0.08% 24,801
Aigen Investment Management, LP $105,096 0.08% 24,328
OSAIC HOLDINGS, INC. $104,440 0.08% 24,176
SUSQUEHANNA INTERNATIONAL GROUP, LLP $94,176 0.07% 21,800
Dynamic Technology Lab Private Ltd $89,925 0.07% 20,816
LPL Financial LLC $86,827 0.07% 20,099
CITIGROUP INC $85,160 0.07% 19,713
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. $84,909 0.07% 19,655
JPMORGAN CHASE & CO $82,290 0.06% 19,049
Creative Planning $80,084 0.06% 18,538
Vanguard Global Advisers, LLC $80,028 0.06% 18,525
D. E. Shaw & Co., Inc. $76,343 0.06% 17,672
BARCLAYS PLC $68,277 0.05% 15,805
HUB Investment Partners, LLC $67,970 0.05% 15,734
Mariner, LLC $66,834 0.05% 15,471
Engineers Gate Manager LP $63,966 0.05% 14,807
Jump Financial, LLC $63,504 0.05% 14,700
CAPTRUST FINANCIAL ADVISORS $61,780 0.05% 14,301
JANE STREET GROUP, LLC $61,776 0.05% 14,300
MANUFACTURERS LIFE INSURANCE COMPANY, THE $59,564 0.05% 13,788
HighTower Advisors, LLC $59,011 0.05% 13,660
Vanguard Personalized Indexing Management, LLC $57,192 0.04% 13,239
ANCHYRA PARTNERS LLC $57,163 0.04% 15,408
PharVision Advisers, LLC $56,328 0.04% 13,039
Schonfeld Strategic Advisors LLC $54,704 0.04% 12,663
Qube Research & Technologies Ltd $51,783 0.04% 11,987
WEALTH ENHANCEMENT ADVISORY SERVICES, LLC $50,993 0.04% 13,745
KESTRA PRIVATE WEALTH SERVICES, LLC $48,790 0.04% 11,294
Post Resch Tallon Group Inc. $46,375 0.04% 12,500
IMC-Chicago, LLC $44,124 0.03% 10,214
Police & Firemen's Retirement System of New Jersey $43,467 0.03% 10,062
Cresset Asset Management, LLC $43,200 0.03% 10,000
Pinnacle Wealth Planning Services, Inc. $37,467 0.03% 10,099
Arax Advisory Partners $32,650 0.03% 7,558
SIMPLEX TRADING, LLC $30,788 0.02% 7,127
PNC FINANCIAL SERVICES GROUP, INC. $30,771 0.02% 7,123
NEW YORK STATE COMMON RETIREMENT FUND $28,084 0.02% 6,501
Legal & General Group Plc $17,249 0.01% 3,993
Ameritas Investment Partners, Inc. $15,012 0.01% 3,475
Tower Research Capital LLC (TRC) $13,426 0.01% 3,108
Sachetta, LLC $12,960 0.01% 3,000
Allworth Financial LP $9,257 0.01% 2,143

Showing the top 100 of 134 holders. Create a free account to see every holder, past quarters, search, filters and CSV export.

Key facts CIK 1503274 CUSIP 74766Q101 13F (30d) 18 filings 18 filers Visit website Investor relations