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Portolan Capital Management’s Quanterix QTRX Stock Holding History

Portolan Capital Management’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 		$8.21M Sell
1,899,308
-1,046,515
-36% -$3.39M 0.31% 91
2026
Q1 		$10.4M Sell
2,945,823
-1,579,730
-35% -$9.22M 0.55% 56
2025
Q4 		$28.8M Buy
4,525,553
+265,702
+6% +$1.65M 1.54% 13
2025
Q3 		$23.1M Buy
4,259,851
+626,229
+17% +$3.33M 1.25% 24
2025
Q2 		$24.2M Buy
3,633,622
+670,225
+23% +$3.74M 1.52% 17
2025
Q1 		$19.3M Buy
2,963,397
+375,573
+15% +$3.13M 1.47% 24
2024
Q4 		$27.5M Buy
2,587,824
+67,138
+3% +$817K 1.85% 12
2024
Q3 		$32.7M Buy
2,520,686
+602,656
+31% +$8.05M 2.37% 8
2024
Q2 		$25.3M Buy
1,918,030
+755,201
+65% +$12.6M 2.09% 11
2024
Q1 		$27.4M Sell
1,162,829
-134,261
-10% -$3.33M 2.09% 8
2023
Q4 		$35.5M Sell
1,297,090
-378,748
-23% -$8.92M 3.1% 5
2023
Q3 		$45.5M Buy
1,675,838
+259,215
+18% +$6.42M 4.25% 2
2023
Q2 		$31.9M Buy
1,416,623
+646,884
+84% +$11.5M 2.83% 6
2023
Q1 		$8.67M Sell
769,739
-92,486
-11% -$1.18M 0.83% 37
2022
Q4 		$11.9M Buy
862,225
+103,372
+14% +$1.19M 1.18% 29
2022
Q3 		$8.36M Buy
758,853
+376,978
+99% +$4.79M 0.88% 34
2022
Q2 		$6.18M Buy
+381,875
New +$7.85M 0.62% 61
2021
Q1 		– Sell
-38,957
Closed -$1.81M – 176
2020
Q4 		$1.81M Sell
38,957
-8,943
-19% -$390K 0.16% 129
2020
Q3 		$1.62M Sell
47,900
-100,819
-68% -$3.25M 0.18% 119
2020
Q2 		$4.07M Sell
148,719
-196,281
-57% -$4.96M 0.47% 82
2020
Q1 		$6.34M Sell
345,000
-26,337
-7% -$601K 0.95% 36
2019
Q4 		$8.78M Buy
371,337
+261,086
+237% +$5.96M 0.89% 45
2019
Q3 		$2.42M Buy
+110,251
New +$3.08M 0.27% 75
2018
Q4 		– Sell
-226,891
Closed -$4.86M – 98
2018
Q3 		$4.86M Buy
+226,891
New +$3.59M 0.48% 60

Other funds holding QTRX

BlackRock
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
First Eagle Investment Management New York $60.8B AUM 26.63% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
LCM
Lionhunter Capital Management New York $222M AUM
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $287B AUM 42.33% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Ameriprise
Ameriprise Minneapolis, Minnesota $495B AUM 43.24% 1-Year Est. Return
Marshall Wace
Marshall Wace London, United Kingdom $127B AUM 46.06% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Portolan Capital Management's QTRX Position: Q2 2026 in Review

Portolan Capital Management reduced its Quanterix (QTRX) stake by 36% in Q2 2026, selling an estimated $3.39M and leaving 1,899,308 shares worth $8.21M. The position accounts for 0.31% of the portfolio, ranked #91.

Portolan Capital Management first reported a position in QTRX in Q3 2018 and has held it in 24 quarters since. The position peaked at $45.5M in Q3 2023. 133 funds tracked by Wall St. Rank hold QTRX as of Q2 2026.

  • Portolan Capital Management held 1,899,308 shares of Quanterix worth $8.21M as of Q2 2026.
  • Portolan Capital Management sold 1,046,515 Quanterix shares in Q2 2026, an estimated $3.39M.
  • Quanterix made up 0.31% of Portolan Capital Management's portfolio in Q2 2026, its #91 holding.
  • Portolan Capital Management first reported a position in Quanterix in Q3 2018 and has held it in 24 quarters since.
  • Portolan Capital Management's Quanterix position peaked at $45.5M in Q3 2023.
  • 133 funds tracked by Wall St. Rank held Quanterix as of Q2 2026.

Based on Portolan Capital Management's 13F filing for Q2 2026, filed 14 Aug 2026.