Simplex Trading
QTRX icon

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
Q1 		$20.8K Sell
5,900
-2,200
-27% -$12.8K ﹤0.01% 6743
2025
Q4 		$51.5K Buy
8,100
+7,800
+2,600% +$48.5K ﹤0.01% 5628
2025
Q3 		$1K Buy
+300
New +$1.6K ﹤0.01% 8861
2025
Q2 		– Sell
-900
Closed -$5K – 9543
2025
Q1 		$5K Sell
900
-2,700
-75% -$22.5K ﹤0.01% 7587
2024
Q4 		$38K Sell
3,600
-2,500
-41% -$30.4K ﹤0.01% 6158
2024
Q3 		$79K Buy
6,100
+3,700
+154% +$49.4K ﹤0.01% 5457
2024
Q2 		$31K Sell
2,400
-4,900
-67% -$81.9K ﹤0.01% 6542
2024
Q1 		$171K Buy
7,300
+6,900
+1,725% +$171K ﹤0.01% 5028
2023
Q4 		$10K Sell
400
-1,000
-71% -$23.5K ﹤0.01% 7449
2023
Q3 		$37K Sell
1,400
-2,500
-64% -$61.9K ﹤0.01% 6077
2023
Q2 		$87K Buy
+3,900
New +$69.5K ﹤0.01% 5255
2023
Q1 		– Sell
-1,900
Closed -$26K – 9924
2022
Q4 		$26K Sell
1,900
-3,700
-66% -$42.6K ﹤0.01% 6617
2022
Q3 		$61K Buy
5,600
+5,500
+5,500% +$69.9K ﹤0.01% 6165
2022
Q2 		$1K Sell
100
-300
-75% -$6.17K ﹤0.01% 9648
2022
Q1 		$11K Sell
400
-7,900
-95% -$241K ﹤0.01% 8806
2021
Q4 		$351K Buy
8,300
+8,200
+8,200% +$383K ﹤0.01% 4330
2021
Q3 		$5K Hold
100
– – ﹤0.01% 9285
2021
Q2 		$5K Buy
100
+98
+4,900% +$5.69K ﹤0.01% 9471
2021
Q1 		$11K Sell
2
-8
-80% -$541 ﹤0.01% 7846
2020
Q4 		$46K Buy
+10
New +$436 ﹤0.01% 6282

Other funds holding QTRX

Ameriprise
Ameriprise Minneapolis, Minnesota $432B AUM 30.22% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
PCM
Portolan Capital Management Boston, Massachusetts $1.88B AUM 115.74% 1-Year Est. Return
BWLSA
Blue Water Life Science Advisors Larkspur, California $125M AUM 91.82% 1-Year Est. Return
William Blair Investment Management
William Blair Investment Management Chicago, Illinois $30.3B AUM 33.75% 1-Year Est. Return
ICM
Invenomic Capital Management Boston, Massachusetts $2.18B AUM 0.03% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
LCS
Levin Capital Strategies New York $1.32B AUM 28.11% 1-Year Est. Return
First Eagle Investment Management
First Eagle Investment Management New York $59B AUM 32.99% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Simplex Trading's QTRX Position: Q4 2025 in Review

Simplex Trading sold out of Quanterix (QTRX) in Q4 2025, closing a stake of 1,563 shares — an estimated $9.71K sold.

Simplex Trading first reported a position in QTRX in Q4 2020 and held it in 11 quarters. The position peaked at $1.91M in Q4 2022. 134 funds tracked by Wall St. Rank hold QTRX as of Q4 2025.

  • Simplex Trading reported no remaining Quanterix position as of Q4 2025 after selling out during the quarter.
  • Simplex Trading sold 1,563 Quanterix shares in Q4 2025, an estimated $9.71K.
  • Simplex Trading first reported a position in Quanterix in Q4 2020 and held it in 11 quarters.
  • Simplex Trading's Quanterix position peaked at $1.91M in Q4 2022.
  • 134 funds tracked by Wall St. Rank held Quanterix as of Q4 2025.

Based on Simplex Trading's 13F filing for Q4 2025, filed 11 Feb 2026.