Ultra Clean (UCTT) General Counsel has 5,501 shares withheld to cover RSU taxes

Rhea-AI Filing Summary

Ultra Clean Holdings General Counsel Paul Yoonku Cho reported share dispositions that were purely to cover taxes on vested equity, not open‑market sales. On April 30, 2026, a total of 5,501 shares of common stock were automatically withheld at $78.15 per share to pay tax liabilities from the partial settlement of restricted stock unit awards that vested. Following these tax-withholding transactions, he continued to hold a direct equity stake in Ultra Clean Holdings as reflected by the post-transaction share balances reported for each line item.

Insider Trade Summary

3 transactions reported

Mixed 3 txns

Insider Cho Paul Yoonku

Role General Counsel and Secretary

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	1,582	$78.15	$124K
Tax Withholding	Common Stock	1,465	$78.15	$114K
Tax Withholding	Common Stock	2,454	$78.15	$192K

Holdings After Transaction: Common Stock — 21,763 shares (Direct, null)

Footnotes (1)

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Key Figures

Tax-withheld shares total: 5,501 shares First withholding lot: 2,454 shares Second withholding lot: 1,465 shares +2 more

5 metrics

Tax-withheld shares total 5,501 shares Total shares withheld for tax liabilities on 2026-04-30

First withholding lot 2,454 shares Common stock withheld for tax at $78.15 per share

Second withholding lot 1,465 shares Common stock withheld for tax at $78.15 per share

Third withholding lot 1,582 shares Common stock withheld for tax at $78.15 per share

Reference price per share $78.15 per share Price applied to all tax-withholding dispositions on 2026-04-30

Key Terms

restricted stock unit, tax liability, tax-withholding disposition, Form 4

4 terms

restricted stock unit financial

"arising as a result of the partial settlement of restricted stock unit awards that vested"

A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.

tax liability financial

"shares automatically withheld for payment of tax liability arising as a result"

tax-withholding disposition financial

"transaction_action": "tax-withholding disposition""

A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.

Form 4 regulatory

"INSIDER FILING DATA (Form 4):"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Cho Paul Yoonku

(Last) (First) (Middle)

ULTRA CLEAN HOLDINGS, INC.

26462 CORPORATE AVENUE

(Street)

HAYWARD CALIFORNIA 94545

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Ultra Clean Holdings, Inc. [ UCTT ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	General Counsel and Secretary

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/30/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	04/30/2026		F		1,582(1)	D	$78.15	21,763	D
Common Stock	04/30/2026		F		1,465(1)	D	$78.15	20,298	D
Common Stock	04/30/2026		F		2,454(1)	D	$78.15	17,844	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Represents shares automatically withheld for payment of tax liability arising as a result of the partial settlement of restricted stock unit awards that vested.

	/s/ Paul Yoonku Cho	05/04/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did UCTT General Counsel Paul Cho report?

Paul Yoonku Cho reported share dispositions used solely to cover tax liabilities. On April 30, 2026, Ultra Clean Holdings automatically withheld shares tied to vested restricted stock units, rather than executing open-market sales, as part of standard equity compensation tax handling.

How many UCTT shares were withheld for Paul Cho’s tax obligations?

A total of 5,501 shares of Ultra Clean Holdings common stock were withheld. These shares covered tax liabilities arising from the partial settlement of vested restricted stock unit awards, as disclosed in the Form 4 footnote, rather than representing discretionary market selling activity.

At what price were Paul Cho’s UCTT shares recorded for tax withholding?

The withheld Ultra Clean Holdings shares were recorded at $78.15 per share. This price is used in the Form 4 disclosure for the 5,501 shares withheld to satisfy tax obligations from vested restricted stock units, reflecting a non-market, administrative transaction.

What is Paul Cho’s role at Ultra Clean Holdings (UCTT)?

Paul Yoonku Cho serves as General Counsel and Secretary of Ultra Clean Holdings. His Form 4 filing reflects routine equity compensation-related tax withholding, a common practice for executives receiving restricted stock unit awards that vest and trigger taxable income.

Were Paul Cho’s UCTT transactions open-market sales of stock?

No, the transactions were tax-withholding dispositions coded as “F” on Form 4. Ultra Clean Holdings automatically withheld shares from vested restricted stock units to pay tax liabilities, meaning there were no open-market sales initiated by Paul Cho in these disclosures.