UCTT director granted 2,575 Ultra Clean shares

MADDOCK ERNEST E reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

MADDOCK ERNEST E reported acquisition or exercise transactions in this Form 4 filing.

Ultra Clean Holdings, Inc. director Ernest E. Maddock reported an equity award of company common stock. On May 22, 2026, he received 2,575 shares of common stock as a grant or award at a stated price of $0.00 per share, increasing his direct holdings to 47,816 shares.

The filing also shows 11,000 shares of common stock held indirectly by a trust. According to the footnote, the related restricted stock units vest 100% on the earlier of the day before the next annual stockholder meeting or one year from the grant date.

Insider Trade Summary

Grant/Award: 2,575 shares

Grant/Award 2 txns

Insider MADDOCK ERNEST E

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	2,575	$0.00	$0.00
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 47,816 shares (Direct); Common Stock — 11,000 shares (Indirect, by Trust)

Footnotes (1)

1. F1. Restricted stock units vest 100% the earlier of the day before the next annual stockholder meeting or 1 year from the date of grant.

Key Figures

Equity award: 2,575 shares Award price: $0.00 per share Direct holdings after award: 47,816 shares +2 more

5 metrics

Equity award 2,575 shares Common stock grant on May 22, 2026

Award price $0.00 per share Stated price for granted common stock

Direct holdings after award 47,816 shares Common stock directly owned after transaction

Indirect trust holdings 11,000 shares Common stock held indirectly by trust

RSU vesting trigger 100% vest Earlier of day before next annual stockholder meeting or 1 year from grant

Key Terms

Restricted stock units, annual stockholder meeting, Grant, award, or other acquisition, indirect ownership, +1 more

5 terms

Restricted stock units financial

"Restricted stock units vest 100% the earlier of the day before the next annual stockholder meeting or 1 year from the date of grant."

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.

annual stockholder meeting financial

"Restricted stock units vest 100% the earlier of the day before the next annual stockholder meeting or 1 year from the date of grant."

An annual stockholder meeting is a yearly gathering where a company's owners (shareholders) receive updates on performance, vote on key issues like board members, executive pay and major corporate plans, and ask questions of management. Think of it as a company town hall where choices about oversight and direction are decided; outcomes can affect management accountability, corporate strategy and ultimately the value and risks of investors’ shares.

Grant, award, or other acquisition financial

"transaction_code_description": "Grant, award, or other acquisition""

indirect ownership financial

""ownership_type": "indirect""

by Trust financial

""nature_of_ownership": "by Trust""

FAQ

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

What insider transaction did UCTT director Ernest E. Maddock report?

Ernest E. Maddock reported receiving a grant of 2,575 shares of Ultra Clean Holdings common stock. The shares were acquired at a stated price of $0.00 per share, reflecting a compensation-related equity award rather than an open-market purchase.

How many UCTT shares does Ernest E. Maddock hold after this Form 4 filing?

After the reported award, Ernest E. Maddock directly holds 47,816 shares of Ultra Clean common stock. The filing also shows an additional 11,000 shares held indirectly by a trust, providing visibility into both his direct and indirect positions.

What are the vesting terms of the restricted stock units reported for UCTT?

The restricted stock units vest 100% on the earlier of the day before Ultra Clean’s next annual stockholder meeting or one year from the grant date. This schedule creates a time-based vesting condition tied to corporate governance timing.

Was the UCTT insider transaction an open-market buy or a compensation grant?

The UCTT insider transaction was a grant or award acquisition, not an open-market purchase or sale. The Form 4 labels the code as "A" for grant, with a price of $0.00 per share, indicating compensation-related equity rather than trading activity.

How is trust ownership of UCTT shares disclosed in this Form 4?

The Form 4 shows 11,000 shares of Ultra Clean common stock held with indirect ownership "by Trust." This indicates the position is attributed to a trust rather than held directly, distinguishing it from Maddock’s directly owned 47,816 shares.

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

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Accepted by SEC EDGAR 05/27/2026 - 09:48 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^*

MADDOCK ERNEST 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)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/22/2026

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(1)	05/22/2026		A		2,575	A	$0	47,816	D
Common Stock								11,000	I	by Trust

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 100% the earlier of the day before the next annual stockholder meeting or 1 year from the date of grant.

	/s/ Paul Y. Cho, as attorney-in-fact for Ernest E. Maddock	05/27/2026
	** 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)