MCCOMBE WILLIAM D.

PrivateCIK: 1878824
Location

CAMPBELL, CA

MCCOMBE WILLIAM D. (Chief Financial Officer) exercised options at CYTEK BIOSCIENCES, INC.

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

M · 3 exercises
InsiderMCCOMBE WILLIAM D.CIK 1878824
IssuerCYTEK BIOSCIENCES, INC.CIK 1831915
Officer· Chief Financial Officer
Since Mar 2026
-9.23K
Net shares
Net seller
$32.8K
Total sold
0
Open market trades
0B · 0S
9
Total transactions
25.72K acquired · 34.95K disposed
Non-Derivative Transactions6

Common Stock

Direct
M · Option Exercise

Shares

+6.32K

Price / share

Trade value

% of position

6.7%
5/18/2026
94.69K101.01K

Common Stock

Direct
F · Tax Withholding

Shares

2.27K

Price / share

$3.55

Trade value

$8.05K

% of position

2.2%
5/18/2026
101.01K98.74K

Common Stock

Direct
M · Option Exercise

Shares

+8.70K

Price / share

Trade value

% of position

8.8%
5/18/2026
98.74K107.44K

Common Stock

Direct
F · Tax Withholding

Shares

3.12K

Price / share

$3.55

Trade value

$11.08K

% of position

2.9%
5/18/2026
107.44K104.32K

Common Stock

Direct
M · Option Exercise

Shares

+10.70K

Price / share

Trade value

% of position

10.3%
5/18/2026
104.32K115.02K

Common Stock

Direct
F · Tax Withholding

Shares

3.84K

Price / share

$3.55

Trade value

$13.63K

% of position

3.3%
5/18/2026
115.02K111.18K
Total

Net shares

+16.49K

Net value

-$32.76K

Derivative Transactions3

Restricted Stock Units

Direct
M · Option Exercise
Converts to

Common Stock

6.32K shares

Shares

6.32K

Strike price

Held after

50.57K

Exercisable

5/18/2026

Restricted Stock Units

Direct
M · Option Exercise
Converts to

Common Stock

8.70K shares

Shares

8.70K

Strike price

Held after

147.91K

Exercisable

5/18/2026

Restricted Stock Units

Direct
M · Option Exercise
Converts to

Common Stock

10.70K shares

Shares

10.70K

Strike price

Held after

246.09K

Exercisable

5/18/2026
MCCOMBE WILLIAM D. — Insider Transaction (Form 4) Filed May 20, 2026 | Finecho