Quanterix Corp (QTRX) - Insider Holders & Insider Ownership

List of insiders holdings for Quanterix Corp:
  1. Shares directly owned by the insider.
  2. Shares indirectly owned by the insider.
  3. Total shares owned by the insider (sum of shares directly and indirectly owned).
  4. Total market value if available.
  5. Shares are not adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
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#Insider Holder NameReport
Date Time		Shares Owned
Directly
Indirectly		Total
Shares Owned		Filing
1ARCH VENTURE FUND VI LP
ARCH Venture Fund VIII Overage L.P.
ARCH VENTURE PARTNERS VI LP
ARCH VENTURE PARTNERS VI LLC
ARCH Venture Partners VIII LLC
BYBEE CLINTON
NELSEN ROBERT
10% Owner		2021-02-02 16:12:233,156,106
0		3,156,106Form 13G
2WALT DAVID R
Director		2025-10-03 20:04:531,871,675
0		1,871,675Form 4
3HRUSOVSKY E KEVIN
Executive Chairman		2022-07-06 16:07:44910,249
0		910,249Form 4
4Toloue Masoud
President & CEO		2025-12-03 11:53:57509,946
0		509,946Form 4
5MEISTER PAUL M
Director		2025-07-02 17:39:38309,279
0		309,279Form 4
6Madaus Martin D
Director		2025-01-06 17:55:4952,729
254,633		307,362Form 4
7DRISCOLL JOSEPH
Chief Financial Officer		2019-01-15 16:02:59203,773
0		203,773Form 4
8CRANDELL KEITH
Director		2023-04-04 18:23:24131,236
0		131,236Form 4
9DOYLE MICHAEL A
CFO and Treasurer		2023-10-02 17:42:4788,332
0		88,332Form 4
10Sriram Vandana
Chief Financial Officer		2025-11-24 14:52:3186,206
0		86,206Form 4
11DONNELLY WILLIAM P
Executive Chair		2025-11-24 19:07:1470,091
0		70,091Form 4
12Hlavinka Sarah E.
Director		2025-07-03 14:37:3260,070
0		60,070Form 4
13Geist William
Chief Operating Officer		2021-02-10 16:10:2156,398
0		56,398Form 4
14Duffy David C.
SVP R&D and CTO		2022-03-28 17:02:3354,730
0		54,730Form 4
15Orticerio Ernest
SVP Finance and Corporate Dev		2019-01-11 16:15:2251,585
0		51,585Form 4
16Flynn Karen
Director		2025-01-06 17:48:2249,661
0		49,661Form 4
17Sachs Alan Bruce
Director		2025-12-08 09:33:3946,727
0		46,727Form 4
18Streeter Jackson
SVP, Corp Dev & Strategy		2019-03-19 16:10:2346,404
0		46,404Form 4
19Fry John J
General Counsel & Secretary		2022-08-03 16:01:4137,671
0		37,671Form 4
20Mattoon Dawn
Sr. VP, Diagnostics		2022-04-05 16:02:3736,876
0		36,876Form 4
21Magovcevic-Liebisch Ivana
Director		2025-01-06 17:57:0436,056
0		36,056Form 4
22Elliott Jeffrey Thomas
Director		2025-01-06 17:49:3635,241
0		35,241Form 4
23Mendel Scott
Director		2025-10-03 20:53:4930,737
0		30,737Form 4
24Chaubal Amol
Chief Financial Officer		2021-05-05 21:15:0730,222
0		30,222Form 4
25LAI GOLDMAN MYLA
Director		2025-10-03 20:54:3629,488
0		29,488Form 4
26Desjourdy Amee
Chief Human Resource Officer		2019-08-21 16:02:0329,188
0		29,188Form 4
27Blaser Brian J
Director		2024-01-04 16:09:1925,461
0		25,461Form 4
28BAL BRUCE J
VP of Ops, Service and Quality		2018-05-14 21:00:5724,185
0		24,185Form 4
29Roskey Mark T.
SVP, Strategic Partnerships		2022-04-05 16:03:0422,325
0		22,325Form 4
30Connolly John M
Director		2020-01-06 16:04:0617,410
0		17,410Form 4
31OLSON LAURIE J
Director		2024-05-14 16:02:1213,738
0		13,738Form 4
32Cole Douglas G.
Director		2019-01-04 16:02:0812,440
0		12,440Form 4
33Stetson Shawn
Interim CFO and Treasurer		2021-05-13 17:32:408,033
0		8,033Form 4
34DEKKERS MARIJN E
Director		2021-06-08 16:19:377,002
0		7,002Form 4
35BAIN CAPITAL VENTURE INVESTORS LLC
BAIN CAPITAL VENTURE PARTNERS 2005 L.P.
BAIN CAPITAL VENTURE FUND 2005 L.P.
BCIP Associates III LLC
BCIP Associates III
BCIP Associates III-B LLC
BCIP Associates III-B
KRUPKA MICHAEL A
Agarwal Ajay
10% Owner		2021-02-16 15:11:310
0		0Form 13G
36Hampton Malcolm Garret
Director		2025-11-25 14:37:490
0		0Form 3
37Flagship Ventures Fund 2004 L P
Flagship Ventures General Partner LLC
AFEYAN NOUBAR
KANIA EDWIN M JR
10% Owner		2020-02-13 16:17:060
0		0Form 13G
38bioMerieux
10% Owner		2019-11-18 15:55:570
0		0Form 13G