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 · 4 exercises

BUSQUE PHILIPPE

Filed: 5/20/2026ACC: 0001991396-26-000002

InsiderBUSQUE PHILIPPECIK 1991396

→

IssuerCYTEK BIOSCIENCES, INC.CIK 1831915

Officer· SVP, GLOBAL SALES AND SERVICES

Since Mar 2026

-2.69K

Net shares

Net seller

$9.5K

Total sold

Open market trades

0B · 0S

Total transactions

10.46K acquired · 13.15K disposed

Non-Derivative Transactions8

Common Stock

Direct

M · Option Exercise

+1.02K

Price / share

—

Trade value

—

% of position

2.9%

5/18/2026

35.69K→36.71K

Common Stock

Direct

F · Tax Withholding

−263.00

Price / share

$3.55

Trade value

$933.65

% of position

0.7%

5/18/2026

36.71K→36.45K

Common Stock

Direct

M · Option Exercise

+1.47K

Price / share

—

Trade value

—

% of position

4.0%

5/18/2026

36.45K→37.92K

Common Stock

Direct

F · Tax Withholding

−378.00

Price / share

$3.55

Trade value

$1.34K

% of position

1.0%

5/18/2026

37.92K→37.54K

Common Stock

Direct

M · Option Exercise

+2.42K

Price / share

—

Trade value

—

% of position

6.4%

5/18/2026

37.54K→39.96K

Common Stock

Direct

F · Tax Withholding

−620.00

Price / share

$3.55

Trade value

$2.20K

% of position

1.6%

5/18/2026

39.96K→39.34K

Common Stock

Direct

M · Option Exercise

+5.55K

Price / share

—

Trade value

—

% of position

14.1%

5/18/2026

39.34K→44.89K

Common Stock

Direct

F · Tax Withholding

−1.42K

Price / share

$3.55

Trade value

$5.06K

% of position

3.2%

5/18/2026

44.89K→43.47K

Total

Net shares

+7.78K

Net value

-$9.53K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	5/18/2026	M · Option Exercise	+1.02K	—	—	2.9%	35.69K	36.71K
Common Stock Direct	5/18/2026	F · Tax Withholding	−263.00	$3.55	$933.65	0.7%	36.71K	36.45K
Common Stock Direct	5/18/2026	M · Option Exercise	+1.47K	—	—	4.0%	36.45K	37.92K
Common Stock Direct	5/18/2026	F · Tax Withholding	−378.00	$3.55	$1.34K	1.0%	37.92K	37.54K
Common Stock Direct	5/18/2026	M · Option Exercise	+2.42K	—	—	6.4%	37.54K	39.96K
Common Stock Direct	5/18/2026	F · Tax Withholding	−620.00	$3.55	$2.20K	1.6%	39.96K	39.34K
Common Stock Direct	5/18/2026	M · Option Exercise	+5.55K	—	—	14.1%	39.34K	44.89K
Common Stock Direct	5/18/2026	F · Tax Withholding	−1.42K	$3.55	$5.06K	3.2%	44.89K	43.47K
Total			+7.78K		-$9.53K

Derivative Transactions4

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Common Stock

1.02K shares

−1.02K

Strike price

Held after

5.64K

Exercisable

—

5/18/2026

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Common Stock

1.47K shares

−1.47K

Strike price

Held after

16.21K

Exercisable

—

5/18/2026

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Common Stock

2.42K shares

−2.42K

Strike price

Held after

41.09K

Exercisable

—

5/18/2026

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Common Stock

5.55K shares

−5.55K

Strike price

Held after

127.67K

Exercisable

—

5/18/2026

Security	Converts To	Date	Type	Shares	Exercisable	Held After
Restricted Stock Units Direct	Common Stock1.02K shares	5/18/2026	M · Option Exercise	−1.02K	—	5.64K
Restricted Stock Units Direct	Common Stock1.47K shares	5/18/2026	M · Option Exercise	−1.47K	—	16.21K
Restricted Stock Units Direct	Common Stock2.42K shares	5/18/2026	M · Option Exercise	−2.42K	—	41.09K
Restricted Stock Units Direct	Common Stock5.55K shares	5/18/2026	M · Option Exercise	−5.55K	—	127.67K