Vandana Sriram - 15 Mar 2026 Form 4 Insider Report for Quanterix Corp (QTRX)

Role
Chief Financial Officer
Signature
/s/ Bonnie McManus, as Attorney-in-Fact
Issuer symbol
QTRX
Transactions as of
15 Mar 2026
Net transactions value
$0
Form type
4
Filing time
16 Mar 2026, 16:10:22 UTC
Previous filing
18 Feb 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Sriram Vandana Chief Financial Officer C/O QUANTERIX CORPORATION, 900 MIDDLESEX TURNPIKE, BILLERICA /s/ Bonnie McManus, as Attorney-in-Fact 16 Mar 2026 0001908223

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction QTRX Common Stock Options Exercise +263 +1% 26,503 15 Mar 2026 Direct F1
transaction QTRX Common Stock Tax liability -93 -0.35% $4.72* 26,410 15 Mar 2026 Direct
transaction QTRX Common Stock Options Exercise +514 +1.9% 26,924 15 Mar 2026 Direct F1
transaction QTRX Common Stock Tax liability -181 -0.67% $4.72* 26,743 15 Mar 2026 Direct
transaction QTRX Common Stock Options Exercise +1,056 +3.9% 27,799 15 Mar 2026 Direct F1
transaction QTRX Common Stock Tax liability -371 -1.3% $4.72* 27,428 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 -263 -5.6% $0.000000* 4,471 15 Mar 2026 Common Stock 263 $0.000000 Direct F2
transaction QTRX Restricted Stock Unit Options Exercise -514 -4.2% $0.000000* 11,825 15 Mar 2026 Common Stock 514 $0.000000 Direct F3
transaction QTRX Restricted Stock Unit Options Exercise -1,056 -2.8% $0.000000* 36,978 15 Mar 2026 Common Stock 1,056 $0.000000 Direct F4
* 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 August 21, 2023, the reporting person was granted 12,624 restricted stock units, vesting 25% on the first anniversary of the grant date, with the remaining 75% vesting in equal monthly installments of 6.25% on the monthly anniversary of the grant date thereafter.
F3 On February 2, 2024, the reporting person was granted 24,675 restricted stock units, vesting 25% on the first anniversary of the grant date, with the remaining 75% vesting in equal monthly installments of 6.25% on the monthly anniversary of the grant date thereafter.
F4 On February 4, 2025, the reporting person was granted 50,712 restricted stock units, vesting 25% on the first anniversary of the grant date, with the remaining 75% vesting in equal monthly installments of 6.25% on the monthly anniversary of the grant date thereafter.