Ultra Clean CAO awarded 9,363 UCTT shares

Ultra Clean Holdings, Inc. Chief Accounting Officer Brian E. Harding received an equity award of 9,363 shares of common stock on June 26, 2026 as a grant or award acquisition.

Rhea-AI Filing Summary

Ultra Clean Holdings, Inc. Chief Accounting Officer Brian E. Harding received an equity award of 9,363 shares of common stock on June 26, 2026 as a grant or award acquisition. Following this grant, he directly holds 37,418 shares. A related footnote states these restricted stock units vest over three years, with equal parts vesting on each anniversary of the June 26, 2026 vesting commencement date.

Insider Trade Summary

Grant/Award: 9,363 shares

Grant/Award 1 txn

Insider HARDING BRIAN E

Role Chief Accounting Officer

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	9,363	$0.00	$0.00

Holdings After Transaction: Common Stock — 37,418 shares (Direct)

Footnotes (1)

1. F1. Restricted stock units vest over 3 years with equal parts vesting on each anniversary of the vesting commencement date of June 26, 2026.

Key Figures

Equity grant size: 9,363 shares Grant price per share: $0.00 per share Post-transaction holdings: 37,418 shares +2 more

5 metrics

Equity grant size 9,363 shares Grant or award acquisition of common stock on June 26, 2026

Grant price per share $0.00 per share Stated transaction price for awarded common stock

Post-transaction holdings 37,418 shares Total common stock directly held after the grant

Vesting period 3 years Restricted stock units vest in equal parts annually

Vesting start date June 26, 2026 Vesting commencement date for restricted stock units

Key Terms

Restricted stock units, Chief Accounting Officer, grant/award acquisition, Form 4

4 terms

Restricted stock units financial

"Restricted stock units vest over 3 years with equal parts vesting"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

Chief Accounting Officer financial

"officer_title": "Chief Accounting Officer""

A chief accounting officer is a senior executive responsible for overseeing a company's financial records and ensuring all accounting practices are accurate and compliant with regulations. They play a key role in preparing financial reports that help investors understand the company's financial health, much like a trusted navigator guiding a ship through complex waters. Their work ensures transparency and trust in the company's financial information.

grant/award acquisition financial

"transaction_action": "grant/award acquisition""

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.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did UCTT executive Brian Harding report on this Form 4?

Brian E. Harding reported receiving a grant of 9,363 shares of Ultra Clean Holdings common stock. The award was classified as a grant or award acquisition and increased his direct holdings to 37,418 shares following the transaction.

What is Brian Harding’s role at Ultra Clean Holdings (UCTT)?

Brian E. Harding serves as the Chief Accounting Officer of Ultra Clean Holdings. The Form 4 shows an equity award granted to him in this officer capacity, increasing his directly held common stock position after the transaction.

How many UCTT shares does Brian Harding hold after this reported grant?

After the reported equity grant, Brian E. Harding directly holds 37,418 shares of Ultra Clean Holdings common stock. This total reflects the addition of 9,363 shares received through the grant or award acquisition on June 26, 2026.

At what price were Brian Harding’s new UCTT shares granted?

The 9,363 shares reported were granted at a stated price of $0.00 per share. This indicates the award was a compensation-related equity grant rather than an open-market purchase, consistent with a grant or award acquisition classification.

How do Brian Harding’s restricted stock units in UCTT vest over time?

The restricted stock units vest over three years, in equal parts on each anniversary of the vesting commencement date of June 26, 2026. This creates a multi-year vesting schedule that ties the award’s full value to continued service over that period.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 06/30/2026 - 09:35 PM EDT Learn about SEC filing dates

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^*

HARDING BRIAN E

(Last) (First) (Middle)

ULTRA CLEAN HOLDINGS, INC.

26462 CORPORATE AVE

(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)
	Chief Accounting Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/26/2026

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	06/26/2026		A		9,363(1)	A	$0	37,418	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. Restricted stock units vest over 3 years with equal parts vesting on each anniversary of the vesting commencement date of June 26, 2026.

	/s/ Paul Y. Cho, as attorney-in-fact for Brian E. Harding	06/30/2026
	** 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)