SRIRAM VANDANA (Chief Financial Officer) exercised options at QUANTERIX CORP

Option exercise — a mechanical event triggered by vesting or expiry. Not a discretionary conviction trade.

M · 3 exercises

SRIRAM VANDANA

Filed: 4/17/2026ACC: 0001908223-26-000008

InsiderSRIRAM VANDANACIK 1908223

→

IssuerQUANTERIX CORPCIK 1503274

Officer· Chief Financial Officer

Since Feb 2026

-548.00

Net shares

Net seller

$2.0K

Total sold

Open market trades

0B · 0S

Total transactions

1.83K acquired · 2.38K disposed

Non-Derivative Transactions6

Common Stock

Direct

M · Option Exercise

+263.00

Price / share

—

Trade value

—

% of position

1.0%

4/15/2026

27.43K→27.69K

Common Stock

Direct

F · Tax Withholding

−79.00

Price / share

$3.60

Trade value

$284.40

% of position

0.3%

4/15/2026

27.69K→27.61K

Common Stock

Direct

M · Option Exercise

+514.00

Price / share

—

Trade value

—

% of position

1.9%

4/15/2026

27.61K→28.13K

Common Stock

Direct

F · Tax Withholding

−154.00

Price / share

$3.60

Trade value

$554.40

% of position

0.5%

4/15/2026

28.13K→27.97K

Common Stock

Direct

M · Option Exercise

+1.06K

Price / share

—

Trade value

—

% of position

3.8%

4/15/2026

27.97K→29.03K

Common Stock

Direct

F · Tax Withholding

−315.00

Price / share

$3.60

Trade value

$1.13K

% of position

1.1%

4/15/2026

29.03K→28.71K

Total

Net shares

+1.28K

Net value

-$1.97K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	4/15/2026	M · Option Exercise	+263.00	—	—	1.0%	27.43K	27.69K
Common Stock Direct	4/15/2026	F · Tax Withholding	−79.00	$3.60	$284.40	0.3%	27.69K	27.61K
Common Stock Direct	4/15/2026	M · Option Exercise	+514.00	—	—	1.9%	27.61K	28.13K
Common Stock Direct	4/15/2026	F · Tax Withholding	−154.00	$3.60	$554.40	0.5%	28.13K	27.97K
Common Stock Direct	4/15/2026	M · Option Exercise	+1.06K	—	—	3.8%	27.97K	29.03K
Common Stock Direct	4/15/2026	F · Tax Withholding	−315.00	$3.60	$1.13K	1.1%	29.03K	28.71K
Total			+1.28K		-$1.97K

Derivative Transactions3

Restricted Stock Unit

Direct

M · Option Exercise

Converts to

Common Stock

263.00 shares

−263.00

Strike price

0.00

Held after

4.21K

Exercisable

—

4/15/2026

Restricted Stock Unit

Direct

M · Option Exercise

Converts to

Common Stock

514.00 shares

−514.00

Strike price

0.00

Held after

11.31K

Exercisable

—

4/15/2026

Restricted Stock Unit

Direct

M · Option Exercise

Converts to

Common Stock

1.06K shares

−1.06K

Strike price

0.00

Held after

35.92K

Exercisable

—

4/15/2026

Security	Converts To	Date	Type	Shares	Exercisable	Held After
Restricted Stock Unit Direct	Common Stock263.00 shares	4/15/2026	M · Option Exercise	−263.00	—	4.21K
Restricted Stock Unit Direct	Common Stock514.00 shares	4/15/2026	M · Option Exercise	−514.00	—	11.31K
Restricted Stock Unit Direct	Common Stock1.06K shares	4/15/2026	M · Option Exercise	−1.06K	—	35.92K