COOK CHRISTOPHER S

PrivateCIK: 1927266
Location

HAYWARD, CA

COOK CHRISTOPHER S (President, Products Div) sold 9.9% of their position (11.90K shares) of ULTRA CLEAN HOLDINGS, INC. on the open market

Open‑market sale worth $896.4K — a moderate reduction. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 1 sale
InsiderCOOK CHRISTOPHER SCIK 1927266
Officer· President, Products Div
Since Apr 2022
-21.11K
Net shares
Net seller
$1.62M
Total sold
1
Open market trades
0B · 1S
4
Total transactions
21.11K disposed
Non-Derivative Transactions4

Common Stock

Direct
F · Tax Withholding

Shares

1.86K

Price / share

$78.15

Trade value

$145.44K

% of position

1.4%
4/30/2026
130.01K128.15K

Common Stock

Direct
F · Tax Withholding

Shares

4.18K

Price / share

$78.15

Trade value

$326.75K

% of position

3.3%
4/30/2026
128.15K123.97K

Common Stock

Direct
F · Tax Withholding

Shares

3.17K

Price / share

$78.15

Trade value

$247.34K

% of position

2.6%
4/30/2026
123.97K120.81K

Common Stock

Direct
S · Sale

Shares

11.90K

Price / share

$75.31

Trade value

$896.41K

% of position

9.9%
4/30/2026
120.81K108.91K
Total

Net shares

21.11K

Net value

-$1.62M

Derivative Transactions0
No derivative transactions reported
Non-Derivative Holdings (Post-Transaction)1

Common Stock

Indirect
Shares owned4.10K
Total
4.10K indirect4.10K
Derivative Holdings (Post-Transaction)0
No derivative holdings reported
COOK CHRISTOPHER S — Insider Transaction (Form 4) Filed May 5, 2026 | Finecho