Simplex Trading’s Quanterix QTRX Stock Holding History

Simplex Trading’s Portfolio QTRX Stock Details QTRX Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$30.8K	Buy	+7,127	New	+$23.1K	﹤0.01%	6736
2025 Q4	–	Sell	-1,563	Closed	-$9.71K	–	9794
2025 Q3	$8K	Sell	1,563 -1,589	-50%	-$8.45K	﹤0.01%	8045
2025 Q2	$20K	Buy	+3,152	New	+$17.6K	﹤0.01%	6776
2024 Q1	–	Sell	-681	Closed	-$16.9K	–	9678
2023 Q4	$18K	Sell	681 -5,182	-88%	-$122K	﹤0.01%	7013
2023 Q3	$159K	Buy	+5,863	New	+$145K	﹤0.01%	4607
2023 Q1	–	Sell	-137,836	Closed	-$1.76M	–	9925
2022 Q4	$1.91M	Buy	137,836 +33,923	+33%	+$390K	﹤0.01%	1904
2022 Q3	$1.15M	Buy	103,913 +102,418	+6,851%	+$1.3M	﹤0.01%	2511
2022 Q2	$24K	Buy	+1,495	New	+$30.7K	﹤0.01%	7410
2021 Q4	–	Sell	-8,253	Closed	-$385K	–	11252
2021 Q3	$490K	Sell	8,253 -1,500	-15%	-$77.3K	﹤0.01%	4138
2021 Q2	$572K	Buy	9,753 +9,045	+1,278%	+$525K	﹤0.01%	3934
2021 Q1	$41K	Buy	708 +508	+254%	+$34.3K	﹤0.01%	6832
2020 Q4	$9K	Buy	+200	New	+$8.73K	﹤0.01%	7477

Other funds holding QTRX

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

BWLSA

Blue Water Life Science Advisors Larkspur, California $159M AUM 139.66% 1-Year Est. Return

First Eagle Investment Management New York $60.8B AUM 26.63% 1-Year Est. Return

PCM

Portolan Capital Management Boston, Massachusetts $2.67B AUM 169.09% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

LCM

Lionhunter Capital Management New York $222M AUM

AQR Capital Management Greenwich, Connecticut $287B AUM 42.33% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Ameriprise Minneapolis, Minnesota $495B AUM 43.24% 1-Year Est. Return

Marshall Wace London, United Kingdom $127B AUM 46.06% 1-Year Est. Return

Simplex Trading's QTRX Position: Q2 2026 in Review

Simplex Trading opened a new position in Quanterix (QTRX) in Q2 2026: 7,127 shares worth $30.8K. The stake represents ﹤0.01% of the portfolio and ranks #6736 among its holdings. This is a return to the name: Simplex Trading previously reported a position in QTRX as recently as Q3 2025.

Simplex Trading first reported a position in QTRX in Q4 2020 and has held it in 12 quarters since. The position peaked at $1.91M in Q4 2022. 133 funds tracked by Wall St. Rank hold QTRX as of Q2 2026.

Simplex Trading held 7,127 shares of Quanterix worth $30.8K as of Q2 2026.
Quanterix was a new Simplex Trading position in Q2 2026.
Quanterix made up ﹤0.01% of Simplex Trading's portfolio in Q2 2026, its #6736 holding.
Simplex Trading first reported a position in Quanterix in Q4 2020 and has held it in 12 quarters since.
Simplex Trading's Quanterix position peaked at $1.91M in Q4 2022.
133 funds tracked by Wall St. Rank held Quanterix as of Q2 2026.

Based on Simplex Trading's 13F filing for Q2 2026, filed 12 Aug 2026.