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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 Mar 2026
the date the book describes
Filed
15 May 2026
latest of these filings; the earliest 12 May 2026
Managers listing it
18
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q4 2025 and Q1 2026; 2 listed it in both
Shares listed
4,134,051
combined, among listed positions
Reported value
$15m
combined, at the quarter end

AllianceBernstein LP. Values in this filing are at the previous quarter end's prices; its share count is the quarter end's.

Among the 91 comparable managers: 12 buyers (opened or added shares) and 6 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +1,710,094.

Managers listing QTRX in Q1 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q4 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

18 of 18 holders

ActionFiling
First Eagle Investment Management LLC1,300,087$4.6munder 0.1%Added+768,66014 May 2026 (the filing on sec.gov)
Millennium Management LLC689,167$2.4munder 0.1%Added+286,53615 May 2026 (the filing on sec.gov)
Marshall Wace LLP622,380$2.2munder 0.1%Added+467,21115 May 2026 (the filing on sec.gov)
Tudor Investment Corp316,001$1.1munder 0.1%Added+146,30615 May 2026 (the filing on sec.gov)
Fidelity (FMR LLC)183,356$645kunder 0.1%Added+23,44915 May 2026 (the filing on sec.gov)
Jane Street Group LLC155,655$548kunder 0.1%Added+86,27212 May 2026 (the filing on sec.gov)
Renaissance Technologies LLC136,207$479kunder 0.1%Added+124,40714 May 2026 (the filing on sec.gov)
Invesco Ltd116,216$409kunder 0.1%Added+3,01612 May 2026 (the filing on sec.gov)
Point72 Asset Management LP93,253$328kunder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Brevan Howard Capital Management LP87,386$308kunder 0.1%Added+70,58615 May 2026 (the filing on sec.gov)
AQR Capital Management LLC84,132$296kunder 0.1%Added+18,61015 May 2026 (the filing on sec.gov)
AllianceBernstein LP44,480$283kunder 0.1%Held015 May 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc68,372$241kunder 0.1%Added+24,59415 May 2026 (the filing on sec.gov)
Citadel Advisors LLC61,001$215kunder 0.1%Trimmed-37,57115 May 2026 (the filing on sec.gov)
Susquehanna International Group LLP50,719$179kunder 0.1%Trimmed-52,91915 May 2026 (the filing on sec.gov)
PDT Partners LLC47,668$168kunder 0.1%Held015 May 2026 (the filing on sec.gov)
Schonfeld Strategic Advisors LLC42,786$151kunder 0.1%Trimmed-18,93615 May 2026 (the filing on sec.gov)
Two Sigma Investments LP35,185$124kunder 0.1%Trimmed-223,67315 May 2026 (the filing on sec.gov)

Largest increases and reductions, by shares

Q4 2025 to Q1 2026, among managers that listed it in both quarters or opened it.

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 (1)

Exited (2)

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 →