Quanterix Corp
A maker of ultra-sensitive blood tests and tissue-imaging tools for biology research and diagnostics. Its Simoa platform detects single protein molecules in blood, powering tests like LucentAD Complete for Alzheimer's disease, while its PhenoCycler spatial biology systems map proteins inside intact tissue. Founded in 2007 by scientist David Walt, whose lab invented the single-molecule array technology, the company began life as Digital Genomics before renaming itself Quanterix. Simoa is short for "single molecule array," and the firm grew further by acquiring spatial-biology pioneer Akoya Biosciences in 2025.
Bought 266.0K
Granted 38.3K · Bought 821.1K
Granted 424.9K · Bought 34.0K · Sold 408.6K
Granted 404.8K · Bought 169.9K · Sold 6.4K
Granted 78.9K · Bought 234.3K
Granted 123.1K · Bought 89.7K · Sold 146.2K
Granted 43.6K · Bought 113.3K
Granted 29.2K · Bought 266.0K
Granted 47.2K · Bought 30.0K · Sold 471
Granted 70.1K
Granted 70.1K
Granted 49.9K · Bought 10.2K
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Granted 54.8K
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Granted 78.7K · Sold 41.8K
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Granted 96.1K · Bought 4.2K
Granted 33.3K · Sold 3.9K
Granted 56.1K · Sold 35.7K
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Granted 20.2K · Sold 6.5K
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Granted 63.9K · Bought 40.0K · Sold 179.0K
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Granted 106.7K · Sold 102.3K
Bought 3.5K
Granted 1.4K
| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| Arch Venture Fund VI LP +6 co-filers10% owner · 15 transactions | — | 4.79Mas of Nov 2020 | — | 266.0K | — |
| bioMerieux/ADR10% owner · 1 transaction | — | 2.06Mas of Dec 2017 | — | — | — |
| Walt David RDirector · 27 transactions | — | 1.87M | 38.3K | 821.1K | — |
| Agarwal Ajay +8 co-filers10% owner · 5 transactions | — | 1.43Mas of Dec 2017 | — | — | — |
| Hrusovsky E KevinExecutive Chairman, Director · 184 transactions | — | 910.2Kas of Jul 2022 | 424.9K | 34.0K | 408.6K |
| Toloue MasoudPresident & CEO, Director · 73 transactions | — | 507.3K | 404.8K | 169.9K | 6.4K |
| Afeyan Noubar +3 co-filers10% owner · 4 transactions | — | 398.3Kas of Dec 2017 | — | — | — |
| Meister Paul MDirector · 38 transactions | — | 313.3K | 78.9K | 234.3K | — |
| Madaus Martin DDirector · 155 transactions | — | 291.5Kas of Jan 2025 | 123.1K | 89.7K | 146.2K |
| Donnelly William PExecutive Chair, Director · 16 transactions | — | 154.1K | 43.6K | 113.3K | — |
| Crandell KeithDirector · 63 transactions | — | 131.2Kas of Apr 2023 | 29.2K | 266.0K | — |
| Doyle Michael ACFO and Treasurer · 20 transactions | — | 88.3Kas of Sep 2023 | 47.2K | 30.0K | 471 |
| Hampton Malcolm GarretDirector · 2 transactions | — | 70.1K | 70.1K | — | — |
| Sachs Alan BruceDirector · 2 transactions | — | 70.1K | 70.1K | — | — |
| Hlavinka Sarah E.Director · 33 transactions | — | 60.1Kas of Jul 2025 | 49.9K | 10.2K | — |
| Flynn KarenDirector · 8 transactions | — | 57.2K | 57.2K | — | — |
| Lai Goldman MylaDirector · 5 transactions | — | 54.8K | 54.8K | — | — |
| Duffy David C.SVP R&D and CTO · 57 transactions | — | 54.7Kas of Mar 2022 | 86.7K | — | 63.0K |
| Orticerio ErnestSVP Finance and Corporate Dev · 16 transactions | — | 48.8Kas of Jan 2019 | 128.8K | — | 80.0K |
| Geist WilliamChief Operating Officer · 2 transactions | — | 45.0Kas of Feb 2021 | 45.0K | — | — |
| Magovcevic-Liebisch IvanaDirector · 3 transactions | — | 43.6K | 43.6K | — | — |
| Elliott Jeffrey ThomasDirector · 3 transactions | — | 42.8K | 42.8K | — | — |
| Fry John JGeneral Counsel & Secretary · 53 transactions | — | 37.7Kas of Aug 2022 | 37.3K | — | 10.5K |
| Mattoon DawnSr. VP, Diagnostics · 85 transactions | — | 36.9Kas of Apr 2022 | 78.7K | — | 41.8K |
| Miller Michael FrancisChief Technology Officer · 48 transactions | — | 33.9K | 6.7K | — | — |
| Streeter JacksonSVP, Corp Dev & Strategy · 2 transactions | — | 32.5Kas of Mar 2019 | 32.5K | — | — |
| Sriram VandanaChief Financial Officer · 52 transactions | — | 31.6K | 96.1K | 4.2K | — |
| Chaubal AmolChief Financial Officer · 31 transactions | — | 30.2Kas of May 2021 | 33.3K | — | 3.9K |
| Roskey Mark T.SVP, Strategic Partnerships · 77 transactions | — | 22.3Kas of Apr 2022 | 56.1K | — | 35.7K |
| Blaser Brian JDirector · 2 transactions | — | 19.0Kas of Jan 2024 | 19.0K | — | — |
| Olson Laurie JDirector · 11 transactions | — | 13.7Kas of May 2024 | 20.2K | — | 6.5K |
| Mendel ScottDirector · 6 transactions | — | 12.5K | 60.4K | — | — |
| Desjourdy AmeeChief Human Resource Officer · 1 transaction | — | 11.8Kas of Aug 2019 | 11.8K | — | — |
| Connolly John MDirector · 4 transactions | — | 9.5Kas of Jan 2020 | 6.8K | 2.7K | — |
| Dekkers Marijn EDirector · 24 transactions | — | 7.0Kas of Jun 2021 | 63.9K | 40.0K | 179.0K |
| Bal Bruce JVP of Ops, Service and Quality · 1 transaction | — | 5.5Kas of May 2018 | 5.5K | — | — |
| Cole Douglas G.Director · 2 transactions | — | 4.5Kas of Jan 2019 | 4.5K | — | — |
| Driscoll JosephChief Financial Officer · 16 transactions | — | 4.4Kas of Jan 2019 | 106.7K | — | 102.3K |
| Meadows BenjaminChief Commercial Officer · 1 transaction | — | 3.5K | — | 3.5K | — |
| Stetson ShawnInterim CFO and Treasurer · 1 transaction | — | 3.3Kas of May 2021 | 1.4K | — | — |
Select a row to see that insider’s individual transactions. Sum of the holdings confirmed in the 12 months before this insider's last filing. A Form 4 reports a holding per line — held directly, or through a named trust, partnership or foundation, and in each share class separately — never a person’s total. Lines not restated in that time are left out and shown apart: an active filer restates what they still hold, so a line they did not restate is more often an entity since renamed, whose shares a successor line reports too. An amber marker means some were left out.
Net open-market activity over all recorded history: +1.00M shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.