BUSQUE PHILIPPE (SVP, GLOBAL SALES AND SERVICES) exercised options at CYTEK BIOSCIENCES, INC.

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

M · 3 exercises

BUSQUE PHILIPPE

Filed: 3/12/2026ACC: 0001991396-26-000001

InsiderBUSQUE PHILIPPECIK 1991396

→

IssuerCYTEK BIOSCIENCES, INC.CIK 1831915

Officer· SVP, GLOBAL SALES AND SERVICES

Since Mar 2026

+200.85K

Net shares

Net buyer

$12.9K

Total sold

Open market trades

0B · 0S

Total transactions

213.72K acquired · 12.87K disposed

Non-Derivative Transactions6

Common Stock

Direct

M · Option Exercise

+2.05K

Price / share

—

Trade value

—

% of position

7.1%

3/10/2026

28.90K→30.95K

Common Stock

Direct

F · Tax Withholding

−635.00

Price / share

$4.23

Trade value

$2.69K

% of position

2.1%

3/10/2026

30.95K→30.32K

Common Stock

Direct

M · Option Exercise

+2.95K

Price / share

—

Trade value

—

% of position

9.7%

3/10/2026

30.32K→33.26K

Common Stock

Direct

F · Tax Withholding

−912.00

Price / share

$4.23

Trade value

$3.86K

% of position

2.7%

3/10/2026

33.26K→32.35K

Common Stock

Direct

M · Option Exercise

+4.83K

Price / share

—

Trade value

—

% of position

14.9%

3/10/2026

32.35K→37.18K

Common Stock

Direct

F · Tax Withholding

−1.50K

Price / share

$4.23

Trade value

$6.33K

% of position

4.0%

3/10/2026

37.18K→35.69K

Total

Net shares

+6.79K

Net value

-$12.87K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	3/10/2026	M · Option Exercise	+2.05K	—	—	7.1%	28.90K	30.95K
Common Stock Direct	3/10/2026	F · Tax Withholding	−635.00	$4.23	$2.69K	2.1%	30.95K	30.32K
Common Stock Direct	3/10/2026	M · Option Exercise	+2.95K	—	—	9.7%	30.32K	33.26K
Common Stock Direct	3/10/2026	F · Tax Withholding	−912.00	$4.23	$3.86K	2.7%	33.26K	32.35K
Common Stock Direct	3/10/2026	M · Option Exercise	+4.83K	—	—	14.9%	32.35K	37.18K
Common Stock Direct	3/10/2026	F · Tax Withholding	−1.50K	$4.23	$6.33K	4.0%	37.18K	35.69K
Total			+6.79K		-$12.87K

Derivative Transactions5

Employee Stock Option (right to buy)

Direct

A · Award

Converts to

Common Stock

70.67K shares

+70.67K

Strike price

4.23

Held after

70.67K

Exercisable

—

3/10/2026

Restricted Stock Units

Direct

A · Award

Converts to

Common Stock

133.23K shares

+133.23K

Strike price

Held after

133.23K

Exercisable

—

3/10/2026

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Common Stock

2.05K shares

−2.05K

Strike price

Held after

6.67K

Exercisable

—

3/10/2026

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Common Stock

2.95K shares

−2.95K

Strike price

Held after

17.68K

Exercisable

—

3/10/2026

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Common Stock

4.83K shares

−4.83K

Strike price

Held after

43.51K

Exercisable

—

3/10/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Employee Stock Option (right to buy) Direct	Common Stock70.67K shares	3/10/2026	A · Award	+70.67K	4.23	—	70.67K
Restricted Stock Units Direct	Common Stock133.23K shares	3/10/2026	A · Award	+133.23K		—	133.23K
Restricted Stock Units Direct	Common Stock2.05K shares	3/10/2026	M · Option Exercise	−2.05K		—	6.67K
Restricted Stock Units Direct	Common Stock2.95K shares	3/10/2026	M · Option Exercise	−2.95K		—	17.68K
Restricted Stock Units Direct	Common Stock4.83K shares	3/10/2026	M · Option Exercise	−4.83K		—	43.51K