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QTRX in the 13F filings

Quanterix Corp · CUSIP 74766Q101

Sector · Medical devices and instrumentsTheme · Healthcare: biopharma and medtech· L3VLUP-defined
Quarter
Q2 2026Q1 2026Q4 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023Q3 2023Q2 2023
Quarter end
31 Dec 2025
the date the book describes
Filed
19 Feb 2026
latest of these filings; the earliest 4 Feb 2026
Managers listing it
20
at least, of 95 tracked, among listed positions
Comparable managers
92
filed both Q3 2025 and Q4 2025; 0 listed it in both
Shares listed
2,510,847
combined, among listed positions
Reported value
$16m
combined, at the quarter end

Among the 92 comparable managers: 9 buyers (opened or added shares) and 10 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was -767,471.

Managers listing QTRX in Q4 2025

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q3 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

20 of 20 holders

ActionFiling
First Eagle Investment Management LLC531,427$3.4munder 0.1%Newnew4 Feb 2026 (the filing on sec.gov)
Millennium Management LLC402,631$2.6munder 0.1%Trimmed-806,56817 Feb 2026 (the filing on sec.gov)
Two Sigma Investments LP258,858$1.6munder 0.1%Added+8,78417 Feb 2026 (the filing on sec.gov)
Tudor Investment Corp169,695$1.1munder 0.1%Newnew17 Feb 2026 (the filing on sec.gov)
Fidelity (FMR LLC)159,907$1.0munder 0.1%Added+42,77417 Feb 2026 (the filing on sec.gov)
Marshall Wace LLP155,169$987kunder 0.1%Trimmed-453,53913 Feb 2026 (the filing on sec.gov)
Invesco Ltd113,200$720kunder 0.1%Added+14,50819 Feb 2026 (the filing on sec.gov)
Susquehanna International Group LLP103,638$659kunder 0.1%Trimmed-38,33117 Feb 2026 (the filing on sec.gov)
Citadel Advisors LLC98,572$627kunder 0.1%Added+15,39117 Feb 2026 (the filing on sec.gov)
Two Sigma Advisers LP86,890$553kunder 0.1%Trimmed-55,30017 Feb 2026 (the filing on sec.gov)
Jane Street Group LLC69,383$441kunder 0.1%Trimmed-80,39612 Feb 2026 (the filing on sec.gov)
AQR Capital Management LLC65,522$417kunder 0.1%Trimmed-92,45317 Feb 2026 (the filing on sec.gov)
Schonfeld Strategic Advisors LLC61,722$393kunder 0.1%Trimmed-74,85317 Feb 2026 (the filing on sec.gov)
PDT Partners LLC47,668$303kunder 0.1%Held017 Feb 2026 (the filing on sec.gov)
D. E. Shaw & Co.45,627$290kunder 0.1%Newnew17 Feb 2026 (the filing on sec.gov)
AllianceBernstein LP44,480$283kunder 0.1%Held017 Feb 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc43,778$279kunder 0.1%Trimmed-15,00017 Feb 2026 (the filing on sec.gov)
ExodusPoint Capital Management LP24,080$153kunder 0.1%Newnew17 Feb 2026 (the filing on sec.gov)
Brevan Howard Capital Management LP16,800$107kunder 0.1%Trimmed-6,44417 Feb 2026 (the filing on sec.gov)
Renaissance Technologies LLC11,800$75kunder 0.1%Newnew12 Feb 2026 (the filing on sec.gov)

Largest increases and reductions, by shares

There is no earlier quarter on file to compare with.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (5)

Exited (1)

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
2 in Q2 2024 to 1 in Q2 2026

Tracked managers listing it, at least.

01234202120222023202420252026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
QTRX by quarter
QuarterHoldersReported valueBuyersSellers
Q4 20203$53mn.a.n.a.
Q1 20214$131mn.a.n.a.
Q2 20213$150mn.a.n.a.
Q3 20213$135mn.a.n.a.
Q4 20213$116mn.a.n.a.
Q1 20223$78mn.a.n.a.
Q2 20222$14mn.a.n.a.
Q3 20222$7.1mn.a.n.a.
Q4 20222$24mn.a.n.a.
Q1 20232$7.5mn.a.n.a.
Q2 20232$15mn.a.n.a.
Q3 20233$39mn.a.n.a.
Q4 20233$27m22
Q1 20242$26m11
Q2 20242$9.4m11
Q3 20241$8.2m02
Q4 20241$6.7m01
Q1 20251$3.9m01
Q2 20251$4.0m00
Q4 20252$3.7m910
Q1 20261$4.6m126
Q2 20261$12m136

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

QTRX and LLY →QTRX and JNJ →QTRX and VRTX →Choose a stock to compare with QTRX →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own QTRX, latest filings →Back to the 13F Explorer →