Quick Takeaways
- QTRX - Quanterix Corp has 28 insiders with reported activity on this page.
- Net insider value flow over the last year: +$2,893,714.
- Recent transaction rows are available for direct filing-level review.
Insider Transactions Reported by 28 Insiders of Quanterix Corp
- Symbol
- QTRX on Nasdaq
- Location
- Billerica, MA
What Changed
- Buy value: $2,893,714; sell value: $0.
- Net share flow: +513,163.
Why This Matters
- This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
- Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.
Source Evidence
Filed on Form 4
See Original Filing
Issuer insider activity is sourced from SEC Forms 3, 4, and 5.
Insider trading overview
Last 12 monthsNet insider flow leans to buying over the last 12 months. Net value: +$2,893,714.
Buys
$2,893,714
Shares: 513,163
Insiders: 4
Sells
$0
Shares: 0
Insiders: 0
Net
+$2,893,714
Shares: +513,163
Insiders: 4
| Window (months) | Buy shares | Sell shares | Buy $ | Sell $ | Net $ |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 4,150 | 0 | $19,878 | $0 | +$19,878 |
| 9-12 | 509,013 | 0 | $2,873,836 | $0 | +$2,873,836 |
Quanterix Corp executives and other stock owners filed with the SEC include:
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| E. Kevin Hrusovsky | Executive Chairman, Director | $24,494,801 | Mixed | 05 Jul 2022 | ||
| David R. Walt | Director | $11,913,078 | +$2,118,764 | +22% | Mixed | 02 Jan 2026 |
| Masoud Toloue | President & CEO, Director | $4,033,114 | +$248,723 | +6.6% | Mixed | 16 Jan 2026 |
| Keith Crandell | Director | $3,531,561 | Mixed | 03 Apr 2023 | ||
| Martin D. Madaus | Director | $3,136,981 | Mixed | 02 Jan 2025 | ||
| Michael A. Doyle | CFO and Treasurer | $2,377,014 | Mixed | 30 Sep 2023 | ||
| Paul M. Meister | Director | $1,992,414 | Mixed | 02 Jan 2026 | ||
| David C. Duffy | SVP R&D and CTO | $1,472,784 | Mixed | 23 Mar 2022 | ||
| John J. Fry | General Counsel & Secretary | $1,013,727 | Mixed | 01 Aug 2022 | ||
| Dawn Mattoon | Sr. VP, Diagnostics | $992,333 | Mixed | 01 Apr 2022 | ||
| Roskey Mark T. | SVP, Strategic Partnerships | $600,766 | Mixed | 01 Apr 2022 | ||
| William P. Donnelly | Executive Chair, Director | $542,573 | +$506,348 | +1398% | Median | 01 Apr 2026 |
| Brian J. Blaser | Director | $512,609 | Mixed | 02 Jan 2024 | ||
| Malcolm Garret Hampton | Director | $445,885 | Mixed | 02 Jan 2026 | ||
| Alan Bruce Sachs | Director | $445,885 | Mixed | 02 Jan 2026 | ||
| Sarah E. Hlavinka | Director | $401,868 | Mixed | 01 Jul 2025 | ||
| Karen Flynn | Director | $363,914 | Mixed | 02 Jan 2026 | ||
| Myla Lai Goldman | Director | $348,597 | Mixed | 02 Jan 2026 | ||
| Ivana Magovcevic-Liebisch | Director | $277,357 | Mixed | 02 Jan 2026 | ||
| Jeffrey Thomas Elliott | Director | $272,191 | Mixed | 02 Jan 2026 | ||
| Laurie J. Olson | Director | $233,271 | Filing P/S | 14 May 2024 | ||
| Shawn Stetson | Interim CFO and Treasurer | $126,800 | Mixed | 11 May 2021 | ||
| Michael Francis Miller | Chief Operating Officer | $114,797 | Median | 30 Apr 2026 | ||
| Vandana Sriram | Chief Financial Officer | $101,069 | +$19,879 | +24% | Median | 15 Apr 2026 |
| Marijn E. Dekkers | Director | $61,086 | Mixed | 11 Jan 2021 | ||
| Scott Mendel | Director | $44,098 | Median | 01 Apr 2026 | ||
| Everett Cunningham | President and CEO, Director | Mixed | 19 Jan 2026 | |||
| Daniel Char | Chief Legal Officer | Mixed | 23 Feb 2026 |
Top shareholders of Quanterix Corp (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.
Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
| Holder | Source | Role / Reporting | Ownership % | Shares | Holdings Value | 12M Net Δ | As of | Details |
|---|---|---|---|---|---|---|---|---|
| AMERIPRISE FINANCIAL INC |
13F
13D/G
|
Company |
2.1%
from 13D/G
|
4,996,073
|
$31,775,037 | — | 31 Dec 2025 | |
| Portolan Capital Management, LLC |
13F
13D/G
|
Company |
9.4%
from 13D/G
|
4,525,553
|
$28,782,517 | — | 31 Dec 2025 | |
| E. Kevin Hrusovsky |
3/4/5
|
Executive Chairman, Director |
—
class O/S missing
|
910,249
|
$24,494,801 | — | 05 Jul 2022 | |
| BlackRock, Inc. |
13F
13D/G
|
Company |
7.3%
from 13D/G
|
3,375,910
|
$21,470,788 | — | 31 Dec 2025 | |
| VANGUARD GROUP INC |
13F
|
Company |
5.7%
|
2,677,833
|
$17,031,018 | — | 31 Dec 2025 | |
| Kent Lake PR LLC |
13D/G
|
— |
4.5%
|
2,089,500
|
$13,894,548 | -$3,694,480 | 11 Jul 2025 | |
| Blue Water Life Science Advisors, LP |
13F
|
Company |
4.4%
|
2,092,147
|
$13,306,055 | — | 31 Dec 2025 | |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC |
13F
|
Company |
4.3%
|
2,046,449
|
$13,015,416 | — | 31 Dec 2025 | |
| Telegraph Hill Partners III, L.P. |
13D/G
|
— |
5.4%
|
2,504,648
|
$12,523,240 | $0 | 30 Sep 2025 | |
| David R. Walt |
3/4/5
|
Director |
—
mixed-class rows
|
1,888,711
mixed-class rows
|
$11,913,078 | +$2,118,764 | 02 Jan 2026 | |
| Invenomic Capital Management LP |
13F
|
Company |
3.2%
|
1,505,208
|
$9,573,123 | — | 31 Dec 2025 | |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
2.3%
|
1,073,967
|
$6,832,078 | — | 31 Dec 2025 | |
| STATE STREET CORP |
13F
|
Company |
1.9%
|
893,401
|
$5,682,030 | — | 31 Dec 2025 | |
| MORGAN STANLEY |
13F
|
Company |
1.7%
|
822,998
|
$5,234,270 | — | 31 Dec 2025 | |
| Trium Capital LLP |
13F
|
Company |
1.7%
|
817,451
|
$5,198,988 | — | 31 Dec 2025 | |
| Williams Jones Wealth Management, LLC. |
13F
|
Company |
1.4%
|
638,939
|
$4,063,652 | — | 31 Dec 2025 | |
| Masoud Toloue |
3/4/5
|
President & CEO, Director |
—
mixed-class rows
|
961,951
mixed-class rows
|
$4,033,114 | +$248,723 | 16 Jan 2026 | |
| Empire Financial Management Company, LLC |
13F
|
Company |
1.3%
|
617,830
|
$3,929,398 | — | 31 Dec 2025 | |
| EASTERLY INVESTMENT PARTNERS LLC |
13F
|
Company |
1.3%
|
616,681
|
$3,922,091 | — | 31 Dec 2025 | |
| Tikvah Management LLC |
13F
|
Company |
1.2%
|
571,619
|
$3,635,497 | — | 31 Dec 2025 | |
| Keith Crandell |
3/4/5
|
Director |
—
class O/S missing
|
131,236
|
$3,531,561 | — | 03 Apr 2023 | |
| First Eagle Investment Management, LLC |
13F
|
Company |
1.1%
|
531,427
|
$3,379,876 | — | 31 Dec 2025 | |
| Martin D. Madaus |
3/4/5
|
Director |
—
mixed-class rows
|
307,362
mixed-class rows
|
$3,136,981 | — | 02 Jan 2025 | |
| MILLENNIUM MANAGEMENT LLC |
13F
|
Company |
0.85%
|
402,631
|
$2,560,733 | — | 31 Dec 2025 | |
| DIMENSIONAL FUND ADVISORS LP |
13F
|
Company |
0.83%
|
389,466
|
$2,476,911 | — | 31 Dec 2025 | |
| Michael A. Doyle |
3/4/5
|
CFO and Treasurer |
—
class O/S missing
|
88,332
|
$2,377,014 | — | 30 Sep 2023 | |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC |
13F
|
Company |
0.77%
|
362,740
|
$2,307,023 | — | 31 Dec 2025 | |
| NORTHERN TRUST CORP |
13F
|
Company |
0.73%
|
345,564
|
$2,197,787 | — | 31 Dec 2025 | |
| Parkman Healthcare Partners LLC |
13F
|
Company |
0.7%
|
328,956
|
$2,092,160 | — | 31 Dec 2025 | |
| Paul M. Meister |
3/4/5
|
Director |
0.66%
|
313,253
|
$1,992,414 | — | 02 Jan 2026 | |
| UBS Group AG |
13F
|
Company |
0.66%
|
311,499
|
$1,981,134 | — | 31 Dec 2025 | |
| TWO SIGMA INVESTMENTS, LP |
13F
|
Company |
0.55%
|
258,858
|
$1,646,337 | — | 31 Dec 2025 | |
| Russell Investments Group, Ltd. |
13F
|
Company |
0.54%
|
256,140
|
$1,629,050 | — | 31 Dec 2025 | |
| ENVESTNET ASSET MANAGEMENT INC |
13F
|
Company |
0.53%
|
252,211
|
$1,604,062 | — | 31 Dec 2025 | |
| GOLDMAN SACHS GROUP INC |
13F
|
Company |
0.53%
|
248,242
|
$1,578,819 | — | 31 Dec 2025 | |
| David C. Duffy |
3/4/5
|
SVP R&D and CTO |
—
class O/S missing
|
54,730
|
$1,472,784 | — | 23 Mar 2022 | |
| IRONWOOD INVESTMENT MANAGEMENT LLC |
13F
|
Company |
0.37%
|
172,330
|
$1,096,019 | — | 31 Dec 2025 | |
| TUDOR INVESTMENT CORP ET AL |
13F
|
Company |
0.36%
|
169,695
|
$1,079,260 | — | 31 Dec 2025 | |
| BNP PARIBAS FINANCIAL MARKETS |
13F
|
Company |
0.36%
|
168,430
|
$1,071,215 | — | 31 Dec 2025 | |
| WELLS FARGO & COMPANY/MN |
13F
|
Company |
0.35%
|
162,686
|
$1,034,683 | — | 31 Dec 2025 | |
| FMR LLC |
13F
|
Company |
0.34%
|
159,907
|
$1,017,010 | — | 31 Dec 2025 | |
| John J. Fry |
3/4/5
|
General Counsel & Secretary |
—
class O/S missing
|
37,671
|
$1,013,727 | — | 01 Aug 2022 | |
| Dawn Mattoon |
3/4/5
|
Sr. VP, Diagnostics |
—
class O/S missing
|
36,876
|
$992,333 | — | 01 Apr 2022 | |
| MARSHALL WACE, LLP |
13F
|
Company |
0.33%
|
155,169
|
$986,876 | — | 31 Dec 2025 | |
| STATE OF WISCONSIN INVESTMENT BOARD |
13F
|
Company |
0.31%
|
147,824
|
$940,161 | — | 31 Dec 2025 | |
| Jump Financial, LLC |
13F
|
Company |
0.31%
|
144,095
|
$916,444 | — | 31 Dec 2025 | |
| Bank of New York Mellon Corp |
13F
|
Company |
0.26%
|
123,521
|
$785,593 | — | 31 Dec 2025 | |
| GSA CAPITAL PARTNERS LLP |
13F
|
Company |
0.26%
|
121,525
|
$773,000 | — | 31 Dec 2025 | |
| BARCLAYS PLC |
13F
|
Company |
0.25%
|
120,203
|
$764,491 | — | 31 Dec 2025 | |
| SCS Capital Management LLC |
13F
|
Company |
0.25%
|
120,035
|
$763,423 | — | 31 Dec 2025 |
Recent Insider Transactions by Companies or Individuals for Quanterix Corp
Showing up to 300 most recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | Value $ | * Price $ | Shares | Shares Owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Michael Francis Miller | QTRX | Common Stock | Tax liability | -0.12% | -39 | 32,613 | 30 Apr 2026 | Direct | ||
| Michael Francis Miller | QTRX | Common Stock | Options Exercise | 0.4% | 130 | 32,652 | 30 Apr 2026 | Direct | ||
| Michael Francis Miller | QTRX | Restricted Stock Unit | Options Exercise | -19.2% | -130 | 549 | 30 Apr 2026 | Direct | ||
| Michael Francis Miller | QTRX | Common Stock | Tax liability | -1.46% | -467 | 31,487 | 15 Apr 2026 | Direct | ||
| Michael Francis Miller | QTRX | Common Stock | Options Exercise | 4.99% | 1,558 | 32,771 | 15 Apr 2026 | Direct | ||
| Michael Francis Miller | QTRX | Restricted Stock Unit | Options Exercise | -64.9% | -1,558 | 841 | 15 Apr 2026 | Direct | ||
| Vandana Sriram | QTRX | Common Stock | Tax liability | -1.95% | -548 | 27,612 | 15 Apr 2026 | Direct | ||
| Vandana Sriram | QTRX | Common Stock | Options Exercise | 6.74% | 1,833 | 29,028 | 15 Apr 2026 | Direct | ||
| Vandana Sriram | QTRX | Restricted Stock Unit | Options Exercise | -30.3% | -1,833 | 4,208 | 15 Apr 2026 | Direct | ||
| William P. Donnelly | QTRX | Common Stock | Award | 4.18% | 6,178 | 154,127 | 01 Apr 2026 | Direct | ||
| Scott Mendel | QTRX | Common Stock | Award | 52.4% | 4,310 | 12,527 | 01 Apr 2026 | Direct | ||
| Michael Francis Miller | QTRX | Common Stock | Tax liability | -0.22% | -69 | 31,340 | 31 Mar 2026 | Direct | ||
| Michael Francis Miller | QTRX | Common Stock | Options Exercise | 0.73% | 229 | 31,470 | 31 Mar 2026 | Direct | ||
| Michael Francis Miller | QTRX | Restricted Stock Unit | Options Exercise | -100% | -229 | 0 | 31 Mar 2026 | Direct | ||
| Michael Francis Miller | QTRX | Common Stock | Tax liability | -1.78% | -549 | 30,314 | 15 Mar 2026 | Direct | ||
| Michael Francis Miller | QTRX | Common Stock | Options Exercise | 5.19% | 1,558 | 31,564 | 15 Mar 2026 | Direct | ||
| Michael Francis Miller | QTRX | Restricted Stock Unit | Options Exercise | -62.8% | -1,558 | 922 | 15 Mar 2026 | Direct | ||
| Vandana Sriram | QTRX | Common Stock | Tax liability | -2.38% | -645 | 26,410 | 15 Mar 2026 | Direct | ||
| Vandana Sriram | QTRX | Common Stock | Options Exercise | 7.06% | 1,833 | 27,799 | 15 Mar 2026 | Direct | ||
| Vandana Sriram | QTRX | Restricted Stock Unit | Options Exercise | -29.1% | -1,833 | 4,471 | 15 Mar 2026 | Direct | ||
| Vandana Sriram | QTRX | Common Stock | Tax liability | -1.03% | -271 | 26,069 | 15 Feb 2026 | Direct | ||
| Vandana Sriram | QTRX | Common Stock | Options Exercise | 3.04% | 777 | 26,332 | 15 Feb 2026 | Direct | ||
| Vandana Sriram | QTRX | Restricted Stock Unit | Options Exercise | -14.1% | -777 | 4,734 | 15 Feb 2026 | Direct | ||
| Vandana Sriram | QTRX | Restricted Stock Unit | Award | 74,905 | 74,905 | 15 Feb 2026 | Direct | |||
| Vandana Sriram | QTRX | Performance Stock Unit | Award | 74,905 | 74,905 | 15 Feb 2026 | Direct | |||
| Vandana Sriram | QTRX | Common Stock | Tax liability | -5.11% | -4,395 | 81,618 | 04 Feb 2026 | Direct | ||
| Everett Cunningham | QTRX | Time-Based Restricted Stock Units | Award | 131.5% | 1,070,000 | 1,883,750 | 19 Jan 2026 | Direct | ||
| Everett Cunningham | QTRX | Performance-Based Restricted Stock Units | Award | 813,750 | 813,750 | 19 Jan 2026 | Direct | |||
| Vandana Sriram | QTRX | Common Stock | Tax liability | -0.32% | -274 | 86,013 | 15 Jan 2026 | Direct | ||
| Masoud Toloue | QTRX | Common Stock | Tax liability | -0.36% | -1,817 | 507,310 | 15 Jan 2026 | Direct | ||
| Paul M. Meister | QTRX | Common Stock | Award | 1.28% | 3,974 | 313,253 | 02 Jan 2026 | Direct | ||
| Ivana Magovcevic-Liebisch | QTRX | Common Stock | Award | 115.5% | 23,372 | 43,607 | 02 Jan 2026 | Direct | ||
| Jeffrey Thomas Elliott | QTRX | Common Stock | Award | 120.4% | 23,372 | 42,792 | 02 Jan 2026 | Direct | ||
| David R. Walt | QTRX | Common Stock | Award | 0.06% | 1,215 | 1,872,890 | 02 Jan 2026 | Direct | ||
| William P. Donnelly | QTRX | Common Stock | Award | 1.6% | 2,377 | 150,751 | 02 Jan 2026 | Direct | ||
| Malcolm Garret Hampton | QTRX | Common Stock | Award | 50% | 23,372 | 70,099 | 02 Jan 2026 | Direct | ||
| Alan Bruce Sachs | QTRX | Common Stock | Award | 50% | 23,372 | 70,099 | 02 Jan 2026 | Direct | ||
| Goldman Myla Lai | QTRX | Common Stock | Award | 85.8% | 25,316 | 54,804 | 02 Jan 2026 | Direct | ||
| Scott Mendel | QTRX | Common Stock | Award | 82.4% | 25,316 | 56,053 | 02 Jan 2026 | Direct | ||
| Karen Flynn | QTRX | Common Stock | Award | 69.1% | 23,372 | 57,212 | 02 Jan 2026 | Direct | ||
| Masoud Toloue | QTRX | Common Stock | Tax liability | -0.05% | -258 | 508,446 | 31 Dec 2025 | Direct | ||
| Vandana Sriram | QTRX | Common Stock | Tax liability | -0.27% | -229 | 85,977 | 15 Dec 2025 | Direct | ||
| Masoud Toloue | QTRX | Common Stock | Tax liability | -0.24% | -1,242 | 508,704 | 15 Dec 2025 | Direct | ||
| Masoud Toloue | QTRX | Common Stock | Tax liability | -0.05% | -254 | 509,946 | 30 Nov 2025 | Direct | ||
| Alan Bruce Sachs | QTRX | Common Stock | Award | 46,727 | 46,727 | 20 Nov 2025 | Direct | |||
| Malcolm Garret Hampton | QTRX | Common Stock | Award | 46,727 | 46,727 | 20 Nov 2025 | Direct | |||
| William P. Donnelly | QTRX | Stock Options (Right to buy) | Award | 70,091 | 70,091 | 20 Nov 2025 | Direct | |||
| Vandana Sriram | QTRX | Common Stock | Tax liability | -0.26% | -229 | 86,206 | 15 Nov 2025 | Direct | ||
| Masoud Toloue | QTRX | Common Stock | Tax liability | -0.24% | -1,242 | 510,200 | 15 Nov 2025 | Direct | ||
| Masoud Toloue | QTRX | Common Stock | Tax liability | -0.05% | -254 | 511,442 | 31 Oct 2025 | Direct |
* An asterisk sign (*) next to the price indicates that the price is likely invalid.