Ticker · CUSIP 74766Q101

QTRX

QUANTERIX CORP

Healthcare·Medical Devices

···Share

Holders (tracked)

Combined shares

1,627,910

Combined value

$10.35M

Last close

$3.50

Quarter

2025Q4

Price is -45.0% vs the avg quarter-end implied price across tracked holders.

Price · 1Y$3.50-1.65 (-32.04%)H $8.06 · L $3.30 · Avg Vol 710K

Position opened

Tracked holders · last 8 quarters

+3 vs previous quarter over the last 8.

SEC event timeline

15 events

Ken Griffin (Citadel Advisors) added2026-02-17
+15,391 shares · 2025Q4
Position
D.E. Shaw & Co. opened position2026-02-17
+45,627 shares · 2025Q4
Position
Izzy Englander (Millennium Mgmt) trimmed2026-02-17
−806,568 shares · 2025Q4
Position
T. Rowe Price trimmed2026-02-17
−15,000 shares · 2025Q4
Position
Paul Tudor Jones (Tudor Investment) opened position2026-02-17
+169,695 shares · 2025Q4
Position
AQR Capital Management trimmed2026-02-17
−92,453 shares · 2025Q4
Position
Two Sigma Investments added2026-02-17
+8,784 shares · 2025Q4
Position
Renaissance Technologies opened position2026-02-12
+11,800 shares · 2025Q4
Position
First Eagle Investment Management opened position2026-02-04
+531,427 shares · 2025Q4
Position
Izzy Englander (Millennium Mgmt) added2025-11-14
+1,197,083 shares · 2025Q3
Position
Two Sigma Investments added2025-11-14
+7,385 shares · 2025Q3
Position
T. Rowe Price added2025-11-14
+19,179 shares · 2025Q3
Position
AQR Capital Management added2025-11-14
+69,716 shares · 2025Q3
Position
Renaissance Technologies exited2025-11-13
−103,200 shares · 2025Q3
Position
Baillie Gifford & Co exited2025-10-31
−600,812 shares · 2025Q3
Position

Insider activity

No insider transactions in the last 30 days.

View full insider history for QTRX →

Follow-the-investor returns

If you'd copied each holder of QTRX…

Cost basis inferred from each manager's quarter-over-quarter position changes. Sorted by % return on the position they're still holding.

Investor	First in	Cost basis	Return	Position value today
Izzy Englander (Millennium Mgmt)	2017Q4	$5.56	-37.0%	$1.4M
Ken Griffin (Citadel Advisors)	2019Q1	$5.73	-39.0%	$345K
First Eagle Investment Management	2025Q4	$6.36	-45.0%	$1.9M
Paul Tudor Jones (Tudor Investment)	2021Q1	$7.82	-55.2%	$594K
Two Sigma Investments	2020Q3	$8.02	-56.4%	$906K
AQR Capital Management	2019Q3	$9.36	-62.6%	$229K
Renaissance Technologies	2019Q2	$11.55	-69.7%	$41K
D.E. Shaw & Co.	2018Q2	$13.13	-73.3%	$160K
T. Rowe Price	2017Q4	$18.89	-81.5%	$153K

Who moved on this name in 2025Q4

Position changes reported for the latest quarter, grouped by direction.

New positions4

First Eagle Investment Management
+531,427
$3.4M
Paul Tudor Jones (Tudor Investment)
+169,695
$1.1M
D.E. Shaw & Co.
+45,627
$290K
Renaissance Technologies
+11,800
$75K

Added to2

Ken Griffin (Citadel Advisors)
+15,391
$98K
Two Sigma Investments
+8,784
$56K

Trimmed3

Izzy Englander (Millennium Mgmt)
−806,568
$5.1M
AQR Capital Management
−92,453
$588K
T. Rowe Price
−15,000
$96

Exited0

—

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.

Quarter	Holders	Shares	Combined value	Δ holders
2022Q1	12	6,841,084	$199.7M	—
2022Q2	9	6,228,845	$100.8M	-3
2022Q3	12	7,218,161	$79.5M	+3
2022Q4	13	7,886,644	$109.2M	+1
2023Q1	13	6,889,879	$77.7M	—
2023Q2	13	6,547,135	$147.6M	—
2023Q3	13	7,793,743	$211.5M	—
2023Q4	11	7,086,584	$193.7M	-2
2024Q1	11	6,733,478	$158.6M	—
2024Q2	10	5,644,470	$74.6M	-1
2024Q3	9	3,350,144	$43.4M	-1
2024Q4	10	3,290,750	$35.0M	+1
2025Q1	10	1,429,136	$9.3M	—
2025Q2	6	1,086,675	$7.2M	-4
2025Q3	6	1,769,807	$9.6M	—
2025Q4	9	1,627,910	$10.4M	+3

Who owns QTRX

9 super-investors · 2025Q4

Tracked stake

1.63M

Combined value

$10M

% of shares outstanding

—

shares-out unknown

Quarter action mix

New4Added2Trim3

#	Manager	Shares	Value	% of book	Last action	8Q trend
1	First Eagle Investment Management	531.4K	$3M	0.0%	New+531.4K	—
2	Izzy Englander Millennium Mgmt	402.6K	$3M	0.0%	Trim−806.6K
3	Two Sigma Investments	258.9K	$2M	0.0%	Added+8.8K
4	Paul Tudor Jones Tudor Investment	169.7K	$1M	0.0%	New+169.7K
5	Ken Griffin Citadel Advisors	98.6K	$627K	0.0%	Added+15.4K
6	AQR Capital Management	65.5K	$417K	0.0%	Trim−92.5K
7	D.E. Shaw & Co.	45.6K	$290K	0.0%	New+45.6K
8	T. Rowe Price	43.8K	$279K	0.0%	Trim−15.0K
9	Renaissance Technologies	11.8K	$75K	0.0%	New+11.8K

Recent moves

20 transactions

TRIMT. Rowe Price
−15,000 · 2025Q4
ADDTwo Sigma Investments
+8,784 · 2025Q4
TRIMIzzy Englander (Millennium Mgmt)
−806,568 · 2025Q4
ADDKen Griffin (Citadel Advisors)
+15,391 · 2025Q4
NEWD.E. Shaw & Co.
+45,627 · 2025Q4
TRIMAQR Capital Management
−92,453 · 2025Q4
NEWPaul Tudor Jones (Tudor Investment)
+169,695 · 2025Q4
NEWRenaissance Technologies
+11,800 · 2025Q4
NEWFirst Eagle Investment Management
+531,427 · 2025Q4
ADDTwo Sigma Investments
+7,385 · 2025Q3
ADDT. Rowe Price
+19,179 · 2025Q3
ADDAQR Capital Management
+69,716 · 2025Q3
ADDIzzy Englander (Millennium Mgmt)
+1,197,083 · 2025Q3
SOLDRenaissance Technologies
−103,200 · 2025Q3
SOLDBaillie Gifford & Co
−600,812 · 2025Q3
ADDTwo Sigma Investments
+106,674 · 2025Q2
SOLDD.E. Shaw & Co.
−75,591 · 2025Q2
TRIMIzzy Englander (Millennium Mgmt)
−43,597 · 2025Q2
ADDT. Rowe Price
+1,665 · 2025Q2
TRIMAQR Capital Management
−10,731 · 2025Q2

Embed this chart

Paste this iframe anywhere to embed the live QTRX chart.

<iframe src="https://openstocks.me/embed/stocks/QTRX" width="100%" height="480" frameborder="0" loading="lazy" title="QTRX chart by OpenStocks" style="border:0;border-radius:12px;background:transparent"></iframe>

Preview: https://openstocks.me/embed/stocks/QTRX

Explore related topics