Michael Francis Miller - 15 Mar 2026 Form 4 Insider Report for Quanterix Corp (QTRX)

Role
Chief Operating Officer
Signature
/s/ Bonnie McManus, Attorney-in-Fact
Issuer symbol
QTRX
Transactions as of
15 Mar 2026
Net transactions value
$0
Form type
4
Filing time
17 Mar 2026, 18:57:26 UTC
Previous filing
17 Mar 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Miller Michael Francis Chief Operating Officer C/O QUANTERIX CORPORATION, 900 MIDDLESEX TURNPIKE, BILLERICA /s/ Bonnie McManus, Attorney-in-Fact 17 Mar 2026 0002120516

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction QTRX Common Stock Options Exercise +81 +0.27% 30,343 15 Mar 2026 Direct F1
transaction QTRX Common Stock Tax liability -29 -0.1% $4.72* 30,314 15 Mar 2026 Direct
transaction QTRX Common Stock Options Exercise +136 +0.45% 30,450 15 Mar 2026 Direct F1
transaction QTRX Common Stock Tax liability -48 -0.16% $4.72* 30,402 15 Mar 2026 Direct
transaction QTRX Common Stock Options Exercise +135 +0.44% 30,537 15 Mar 2026 Direct F1
transaction QTRX Common Stock Tax liability -48 -0.16% $4.72* 30,489 15 Mar 2026 Direct
transaction QTRX Common Stock Options Exercise +372 +1.2% 30,861 15 Mar 2026 Direct F1
transaction QTRX Common Stock Tax liability -131 -0.42% $4.72* 30,730 15 Mar 2026 Direct
transaction QTRX Common Stock Options Exercise +834 +2.7% 31,564 15 Mar 2026 Direct F1
transaction QTRX Common Stock Tax liability -293 -0.93% $4.72* 31,271 15 Mar 2026 Direct

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction QTRX Restricted Stock Unit Options Exercise -81 -8.1% $0.000000* 922 15 Mar 2026 Common Stock 81 $0.000000 Direct F2
transaction QTRX Restricted Stock Unit Options Exercise -136 -7.6% $0.000000* 1,661 15 Mar 2026 Common Stock 136 $0.000000 Direct F3
transaction QTRX Restricted Stock Unit Options Exercise -135 -4.2% $0.000000* 3,116 15 Mar 2026 Common Stock 135 $0.000000 Direct F4
transaction QTRX Restricted Stock Unit Options Exercise -372 -3.7% $0.000000* 9,689 15 Mar 2026 Common Stock 372 $0.000000 Direct F5
transaction QTRX Restricted Stock Unit Options Exercise -834 -8.6% $0.000000* 8,855 15 Mar 2026 Common Stock 834 $0.000000 Direct F6
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Restricted stock units convert into common stock on a one-for-one basis.
F2 On February 6, 2023, the reporting person was granted 3,929 restricted stock units, vesting 25% on the first anniversary of the grant date, with the remaining 75% vesting in 36 equal monthly installments on the 15th day of each month thereafter.
F3 On March 15, 2023, the reporting person was granted 6,566 restricted stock units, vesting 25% on the first anniversary of the grant date, with the remaining 75% vesting in 36 equal monthly installments on the 15th day of each month thereafter.
F4 On February 2, 2024, the reporting person was granted 6,494 restricted stock units, vesting 25% on the first anniversary of the grant date, with the remaining 75% vesting in 36 equal monthly installments on the 15th day of each month thereafter.
F5 On May 21, 2024, the reporting person was granted 17,878 restricted stock units, vesting 25% on the first anniversary of the grant date, with the remaining 75% vesting in 36 equal monthly installments on the 15th day of each month thereafter.
F6 On February 4, 2025, the reporting person was granted 40,036 restricted stock units, vesting 25% on the first anniversary of the grant date, with the remaining 75% vesting in 36 equal monthly installments on the 15th day of each month thereafter.