Quanterix Corp - Common Stock, par value $0.001 (QTRX)

Historical Holders from Q4 2017 to Q4 2025

Type / Class
Equity / Common Stock, par value $0.001
Symbol
QTRX on Nasdaq
Shares outstanding
46,382,370
Price per share
$6.36
All holders as of 30 Sep 2025
Q3 2025
Total 13F shares as of 30 Sep 2025
35,667,289
Holdings value
$193,650,860
% of all portfolios
0%
Share change
+910,153
Value change
+$2,747,086
Average buys %
+0%
Average sells %
-0%
Number of holders
126
Price from insider filings
$6.36
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Significant Owners of Quanterix Corp - Common Stock, par value $0.001 (QTRX) based on Schedule 13D/G filings

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
AMERIPRISE FINANCIAL INC 9.1% -15% $23,042,270 +$453,611 4,243,512 +2% Ameriprise Financial, Inc. 30 Sep 2025
Portolan Capital Management, LLC 9.4% +22% $21,402,034 +$3,947,625 3,633,622 +23% Portolan Capital Management, LLC 30 Jun 2025
BlackRock, Inc. 7.3% $18,911,004 2,843,760 BlackRock, Inc. 30 Jun 2025
VANGUARD GROUP INC 6.5% $14,143,802 2,525,679 The Vanguard Group 31 Mar 2025
Telegraph Hill Partners III, L.P. 5.4% $12,523,240 2,504,648 Telegraph Hill Partners III, L.P. 30 Sep 2025
Kent Lake PR LLC 4.5% -34% $13,894,548 -$3,694,480 2,089,500 -21% Kent Lake PR LLC 11 Jul 2025
ALLIANCEBERNSTEIN L.P. 0.1% -103% $207,088 -$13,455,820 36,980 -98% AllianceBernstein L.P. 31 Mar 2025
As of 30 Sep 2025, Quanterix Corp - Common Stock, par value $0.001 (QTRX) has 126 institutional shareholders filing 13F forms. They hold 35,667,289 shares of 46,382,370 outstanding shares (77%) .

Top 25 institutional shareholders own 65% of the company.

Filer Ownership Nb Shares Share Change % Portfolio % Holdings Value
Portolan Capital Management, LLC 9.2% 4,259,851 +17% 1.3% $23,130,991
AMERIPRISE FINANCIAL INC 9.1% 4,243,512 +0.16% 0.01% $23,042,271
BlackRock, Inc. 6.7% 3,112,980 +6.4% 0% $16,903,481
VANGUARD GROUP INC 5.7% 2,647,515 +4.7% 0% $14,376,007
Invenomic Capital Management LP 3% 1,393,005 +22% 0.4% $7,564,017
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 2.8% 1,315,280 +17% 0.02% $7,141,970
EASTERLY INVESTMENT PARTNERS LLC 2.7% 1,252,184 +16% 0.46% $6,799,359
MILLENNIUM MANAGEMENT LLC 2.6% 1,209,199 +9880% 0.01% $6,565,951
GEODE CAPITAL MANAGEMENT, LLC 2.2% 1,011,890 +14% 0% $5,495,644
Kent Lake PR LLC 2.2% 1,001,000 -56% 2.8% $5,435,430
Blue Water Life Science Advisors, LP 2.1% 957,747 0% 4.7% $5,200,566
STATE STREET CORP 1.8% 819,534 +7.1% 0% $4,450,070
MORGAN STANLEY 1.7% 806,263 +4.5% 0% $4,378,008
DIMENSIONAL FUND ADVISORS LP 1.5% 707,071 -12% 0% $3,838,842
Trium Capital LLP 1.5% 688,597 +17% 1.5% $3,739,082
Williams Jones Wealth Management, LLC. 1.5% 686,464 +1.5% 0.04% $3,727,500
MARSHALL WACE, LLP 1.3% 608,708 +37% 0% $3,305,284
Tikvah Management LLC 1.2% 571,619 0% 0.94% $3,103,891
Aberdeen Group plc 1.2% 564,581 +34% 0% $3,065,675
ENVESTNET ASSET MANAGEMENT INC 1.1% 515,861 +123% 0% $2,801,125
Empire Financial Management Company, LLC 0.98% 452,430 +265% 0.56% $2,456,694
Russell Investments Group, Ltd. 0.94% 434,060 +2.2% 0% $2,356,945
UBS Group AG 0.81% 373,600 -2.9% 0% $2,028,648
NORTHERN TRUST CORP 0.76% 353,658 +10% 0% $1,920,363
CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.71% 331,246 +11% 0% $1,798,666

Institutional Holders of Quanterix Corp - Common Stock, par value $0.001 (QTRX) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price Investors
2025 Q4 14,075 $89,518 +$1,648 $6.36 4
2025 Q3 35,667,289 $193,650,860 +$2,747,086 $5.43 126
2025 Q2 34,706,219 $230,800,985 -$1,229,254 $6.65 135
2025 Q1 35,052,627 $228,183,737 -$13,775,858 $6.51 147
2024 Q4 34,986,611 $371,914,799 +$16,121,868 $10.63 149
2024 Q3 33,241,563 $430,807,040 +$1,578,585 $12.96 148
2024 Q2 32,444,291 $428,581,553 -$24,339,668 $13.21 154
2024 Q1 32,304,424 $761,091,215 +$14,149,198 $23.56 162
2023 Q4 31,606,543 $864,126,575 -$24,356,227 $27.34 171
2023 Q3 32,368,786 $878,491,034 -$2,866,513 $27.14 157
2023 Q2 32,508,081 $733,059,314 +$7,550,645 $22.55 136
2023 Q1 32,857,738 $370,299,549 +$10,875,738 $11.27 134
2022 Q4 31,640,627 $438,223,400 +$20,742,320 $13.85 128
2022 Q3 29,860,035 $329,002,411 -$53,914,115 $11.02 137
2022 Q2 32,056,174 $519,013,659 -$13,420,976 $16.19 126
2022 Q1 32,058,199 $935,417,025 +$5,961,086 $29.19 137
2021 Q4 31,614,679 $1,339,716,574 +$25,726,485 $42.40 148
2021 Q3 30,798,959 $1,533,673,090 +$40,652,565 $49.79 148
2021 Q2 29,988,923 $1,759,555,578 +$118,333,332 $58.66 156
2021 Q1 28,296,161 $1,655,248,478 +$302,307,999 $58.47 158
2020 Q4 23,236,863 $1,081,130,529 +$57,531,970 $46.50 139
2020 Q3 22,662,885 $764,777,296 +$79,015,895 $33.74 110
2020 Q2 20,335,622 $556,955,810 +$25,091,575 $27.39 88
2020 Q1 19,579,910 $359,723,891 -$8,112,263 $18.37 80
2019 Q4 19,760,825 $466,933,253 +$19,216,424 $23.63 82
2019 Q3 18,912,293 $415,310,210 +$116,253,289 $21.96 86
2019 Q2 13,456,355 $454,666,714 +$139,461,201 $33.79 86
2019 Q1 9,409,606 $243,046,269 +$4,038,727 $25.83 67
2018 Q4 11,619,932 $212,758,568 +$6,126,624 $18.31 59
2018 Q3 8,992,253 $192,610,384 +$4,336,602 $21.42 50
2018 Q2 8,830,428 $126,807,231 +$11,234,140 $14.36 45
2018 Q1 10,039,558 $170,571,569 +$6,281,533 $17.04 40
2017 Q4 9,515,854 $203,688,000 +$203,688,000 $21.47 31