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 · 2 exercises

SRIRAM VANDANA

Filed: 2/18/2026ACC: 0001908223-26-000006

InsiderSRIRAM VANDANACIK 1908223

→

IssuerQUANTERIX CORPCIK 1503274

Officer· Chief Financial Officer

Since Feb 2026

+149.54K

Net shares

Net buyer

$1.6K

Total sold

Open market trades

0B · 0S

Total transactions

150.59K acquired · 1.05K disposed

Non-Derivative Transactions4

Common Stock

Direct

M · Option Exercise

+514.00

Price / share

—

Trade value

—

% of position

2.0%

2/15/2026

25.73K→26.25K

Common Stock

Direct

F · Tax Withholding

−179.00

Price / share

$5.74

Trade value

$1.03K

% of position

0.7%

2/15/2026

26.25K→26.07K

Common Stock

Direct

M · Option Exercise

+263.00

Price / share

—

Trade value

—

% of position

1.0%

2/15/2026

26.07K→26.33K

Common Stock

Direct

F · Tax Withholding

−92.00

Price / share

$5.74

Trade value

$528.08

% of position

0.3%

2/15/2026

26.33K→26.24K

Total

Net shares

+506.00

Net value

-$1.56K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	2/15/2026	M · Option Exercise	+514.00	—	—	2.0%	25.73K	26.25K
Common Stock Direct	2/15/2026	F · Tax Withholding	−179.00	$5.74	$1.03K	0.7%	26.25K	26.07K
Common Stock Direct	2/15/2026	M · Option Exercise	+263.00	—	—	1.0%	26.07K	26.33K
Common Stock Direct	2/15/2026	F · Tax Withholding	−92.00	$5.74	$528.08	0.3%	26.33K	26.24K
Total			+506.00		-$1.56K

Derivative Transactions4

Performance Stock Unit

Direct

A · Award

Converts to

Common Stock

74.91K shares

+74.91K

Strike price

0.00

Held after

74.91K

Exercisable

—

2/15/2026

Restricted Stock Unit

Direct

A · Award

Converts to

Common Stock

74.91K shares

+74.91K

Strike price

0.00

Held after

74.91K

Exercisable

—

2/15/2026

Restricted Stock Unit

Direct

M · Option Exercise

Converts to

Common Stock

263.00 shares

−263.00

Strike price

0.00

Held after

4.73K

Exercisable

—

2/15/2026

Restricted Stock Unit

Direct

M · Option Exercise

Converts to

Common Stock

514.00 shares

−514.00

Strike price

0.00

Held after

12.34K

Exercisable

—

2/15/2026

Security	Converts To	Date	Type	Shares	Exercisable	Held After
Performance Stock Unit Direct	Common Stock74.91K shares	2/15/2026	A · Award	+74.91K	—	74.91K
Restricted Stock Unit Direct	Common Stock74.91K shares	2/15/2026	A · Award	+74.91K	—	74.91K
Restricted Stock Unit Direct	Common Stock263.00 shares	2/15/2026	M · Option Exercise	−263.00	—	4.73K
Restricted Stock Unit Direct	Common Stock514.00 shares	2/15/2026	M · Option Exercise	−514.00	—	12.34K