Latest Period
Q1 2026
Security Snapshot
Quanterix Corp - Common Stock, $0.001 par value per share (QTRX) Institutional Ownership
CUSIP: 74766Q101
13F Institutional Holders and Ownership History from Q4 2017 to Q1 2026
Institutions Reporting
126
Shares (Excl. Options)
36,401,474
Price
$3.52
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- Security type / class
- Equity / Common Stock, $0.001 par value per share
- Symbol
- QTRX on Nasdaq
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 36,401,474
- Total 13F value
- $128,129,720
- Portfolio coverage rank
- 0%
- Share change
- +1,461,708
- Value change
- +$1,996,510
- Number of holders
- 126
- Shares outstanding
- 47,133,168
- SEC-reported price per share
- $2.88
- Insider filing price
- $2.88
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- QTRX - Quanterix Corp - Common Stock, $0.001 par value per share is tracked under CUSIP 74766Q101.
- 126 institutions reported positions in Q1 2026.
- 6 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 132 to 126 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $223,245,522 to $128,129,720.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 126 institutions filings for Q1 2026.
Security key
74766Q101
Latest holder period
Q1 2026
13F holders
126
13D/G owners
6
CIK / CUSIP context first
Open Q1 2026 holders
QTRX full holder history
Quanterix Corp SEC filings
Quanterix Corp company facts
Quanterix Corp insider transactions
Quanterix Corp 13D/G history
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 74766Q101:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
6
Security
QTRX
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| Portolan Capital Management, LLC | 6.2% | -35% | $9,897,965 | -$2,311,005 | 2,945,823 | -19% | Portolan Capital Management, LLC | 31 Mar 2026 |
| BlackRock, Inc. | 7.3% | $18,911,004 | 2,843,760 | BlackRock, Inc. | 30 Jun 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 |
| AMERIPRISE FINANCIAL INC | 2.1% | -78% | $3,327,153 | -$13,459,653 | 990,224 | -80% | Ameriprise Financial, Inc. | 30 Apr 2026 |
| ALLIANCEBERNSTEIN L.P. | 0.1% | -103% | $207,088 | -$13,455,820 | 36,980 | -98% | AllianceBernstein L.P. | 31 Mar 2025 |
As of 31 Mar 2026, 126 institutional investors reported holding 36,401,474 shares of Quanterix Corp - Common Stock, $0.001 par value per share (QTRX). This represents 77% of the company’s total 47,133,168 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
66%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| AMERIPRISE FINANCIAL INC | 7.5% | 3,542,374 | -29% | 0% | $12,469,155 |
| BlackRock, Inc. | 7% | 3,277,595 | -2.9% | 0% | $11,537,134 |
| Portolan Capital Management, LLC | 6.2% | 2,945,823 | -35% | 0.55% | $10,369,297 |
| Blue Water Life Science Advisors, LP | 4.5% | 2,142,147 | +2.4% | 6% | $7,540,357 |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | 4.4% | 2,083,699 | +1.8% | 0.02% | $7,334,620 |
| Invenomic Capital Management LP | 4.1% | 1,932,386 | +28% | 0.31% | $6,801,999 |
| VANGUARD CAPITAL MANAGEMENT LLC | 3.8% | 1,784,613 | 0% | 0% | $6,281,838 |
| LEVIN CAPITAL STRATEGIES, L.P. | 3.1% | 1,464,052 | 0.39% | $5,153,463 | |
| First Eagle Investment Management, LLC | 2.8% | 1,300,087 | +145% | 0.01% | $4,576,306 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.1% | 994,764 | -7.4% | 0% | $3,502,527 |
| Trium Capital LLP | 2.1% | 994,217 | +22% | 2.5% | $3,499,644 |
| STATE STREET CORP | 1.9% | 898,277 | +0.55% | 0% | $3,161,935 |
| Empire Financial Management Company, LLC | 1.6% | 736,068 | +19% | 0.59% | $2,590,959 |
| MILLENNIUM MANAGEMENT LLC | 1.5% | 689,167 | +71% | 0% | $2,425,868 |
| ENVESTNET ASSET MANAGEMENT INC | 1.4% | 682,711 | +171% | 0% | $2,403,143 |
| Russell Investments Group, Ltd. | 1.4% | 641,981 | +151% | 0% | $2,259,773 |
| MARSHALL WACE, LLP | 1.3% | 622,380 | +301% | 0% | $2,190,778 |
| Williams Jones Wealth Management, LLC. | 1.3% | 613,439 | -4% | 0.03% | $2,159,305 |
| MORGAN STANLEY | 1.3% | 607,856 | -26% | 0% | $2,139,655 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 1.2% | 576,600 | 0% | 0% | $2,029,632 |
| Tikvah Management LLC | 1.2% | 571,619 | 0% | 0.62% | $2,012,099 |
| Topline Capital Management, LLC | 1.2% | 563,135 | 0.33% | $1,982,235 | |
| Pier Capital, LLC | 1% | 492,368 | 0.29% | $1,733,135 | |
| DIMENSIONAL FUND ADVISORS LP | 0.94% | 443,118 | +14% | 0% | $1,559,499 |
| UBS Group AG | 0.8% | 376,982 | +21% | 0% | $1,326,977 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
34
Latest
Q1 2026
Rows shown
1-25 of 34
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 36,401,474 | $128,129,720 | +$1,996,510 | $3.52 | 126 |
| 2025 Q4 | 35,108,662 | $223,245,522 | +$4,778,341 | $6.36 | 132 |
| 2025 Q3 | 35,667,301 | $193,650,925 | +$2,746,608 | $5.43 | 127 |
| 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 |