Baillie Gifford & Co
QTRX icon

Baillie Gifford & Co’s Quanterix QTRX Stock Holding History

Baillie Gifford & Co’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
2025
Q3 		– Sell
-600,812
Closed -$4M – 279
2025
Q2 		$4M Hold
600,812
– – ﹤0.01% 229
2025
Q1 		$3.91M Sell
600,812
-28,985
-5% -$242K ﹤0.01% 232
2024
Q4 		$6.69M Sell
629,797
-3,204
-0.5% -$39K 0.01% 219
2024
Q3 		$8.2M Sell
633,001
-459
-0.1% -$6.13K 0.01% 218
2024
Q2 		$8.37M Buy
633,460
+10,105
+2% +$169K 0.01% 223
2024
Q1 		$14.7M Sell
623,355
-8,218
-1% -$204K 0.01% 202
2023
Q4 		$17.3M Sell
631,573
-324
-0.1% -$7.63K 0.01% 198
2023
Q3 		$17.1M Hold
631,897
– – 0.02% 191
2023
Q2 		$14.2M Hold
631,897
– – 0.01% 202
2023
Q1 		$7.12M Sell
631,897
-298
-0% -$3.81K 0.01% 232
2022
Q4 		$8.76M Hold
632,195
– – 0.01% 228
2022
Q3 		$6.97M Buy
632,195
+1,325
+0.2% +$16.8K 0.01% 231
2022
Q2 		$10.2M Sell
630,870
-1,378
-0.2% -$28.3K 0.01% 212
2022
Q1 		$18.5M Buy
632,248
+5,646
+0.9% +$173K 0.01% 212
2021
Q4 		$26.6M Buy
626,602
+25,044
+4% +$1.17M 0.01% 211
2021
Q3 		$30M Buy
601,558
+387
+0.1% +$19.9K 0.02% 206
2021
Q2 		$35.3M Buy
601,171
+87,159
+17% +$5.06M 0.02% 207
2021
Q1 		$30.1M Buy
+514,012
New +$34.7M 0.02% 208

Other funds holding QTRX

PCM
Portolan Capital Management Boston, Massachusetts $1.88B AUM 115.74% 1-Year Est. Return
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
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
ICM
Invenomic Capital Management Boston, Massachusetts $2.18B AUM 0.03% 1-Year Est. Return
William Blair Investment Management
William Blair Investment Management Chicago, Illinois $30.3B AUM 33.75% 1-Year Est. Return
EIP
Easterly Investment Partners Beverly, Massachusetts $1.31B AUM 18.17% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
KLP
Kent Lake PR Anasco, Puerto Rico $198M AUM 5.21% 1-Year Est. Return

Baillie Gifford & Co's QTRX Position: Q3 2025 in Review

Baillie Gifford & Co sold out of Quanterix (QTRX) in Q3 2025, closing a stake of 600,812 shares — an estimated $4M sold.

Baillie Gifford & Co first reported a position in QTRX in Q1 2021 and held it in 18 quarters. The position peaked at $35.3M in Q2 2021. 129 funds tracked by Wall St. Rank hold QTRX as of Q3 2025.

  • Baillie Gifford & Co reported no remaining Quanterix position as of Q3 2025 after selling out during the quarter.
  • Baillie Gifford & Co sold 600,812 Quanterix shares in Q3 2025, an estimated $4M.
  • Baillie Gifford & Co first reported a position in Quanterix in Q1 2021 and held it in 18 quarters.
  • Baillie Gifford & Co's Quanterix position peaked at $35.3M in Q2 2021.
  • 129 funds tracked by Wall St. Rank held Quanterix as of Q3 2025.

Based on Baillie Gifford & Co's 13F filing for Q3 2025, filed 31 Oct 2025.