Ultra Clean (UCTT) CAO sells 4,000 common shares at $80

Rhea-AI Filing Summary

Ultra Clean Holdings, Inc. Chief Accounting Officer Brian E. Harding reported an open-market sale of 4,000 shares of Common Stock at $80.00 per share. After this transaction, he directly owns 36,631 shares, and the footnote confirms these are directly owned shares.

Insider Trade Summary

Net Seller: 4,000 shares ($320,000)

Net Sell 1 txn

Insider HARDING BRIAN E

Role Chief Accounting Officer

Sold 4,000 shs ($320K)

Type	Security	Shares	Price	Value
Sale	Common Stock	4,000	$80.00	$320K

Holdings After Transaction: Common Stock — 36,631 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

Shares sold: 4,000 shares Sale price: $80.00 per share Shares owned after transaction: 36,631 shares +1 more

4 metrics

Shares sold 4,000 shares Open-market sale of Common Stock

Sale price $80.00 per share Price for the 4,000 sold shares

Shares owned after transaction 36,631 shares Direct Common Stock holdings post-sale

Sell transactions in filing 1 sale Single reported open-market sale on Form 4

Key Terms

open-market sale, Common Stock, Chief Accounting Officer

3 terms

open-market sale financial

"transaction_action": "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Common Stock financial

""security_title": "Common Stock""

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

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.

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^*

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)
05/05/2026

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	05/05/2026		S		4,000	D	$80	36,631(1)	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. This sale represents directly owned Shares.

	/s/ Paul Y. Cho, as attorney-in-fact for Brian E. Harding	05/07/2026
	** 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 Ultra Clean (UCTT) report for Brian E. Harding?

Ultra Clean reported that Chief Accounting Officer Brian E. Harding executed an open-market sale of 4,000 shares of Common Stock at $80.00 per share. This Form 4 filing records the details of the sale and his resulting share ownership.

How many Ultra Clean (UCTT) shares did Brian E. Harding sell and at what price?

Brian E. Harding sold 4,000 shares of Ultra Clean Common Stock at a price of $80.00 per share. The transaction is classified as an open-market sale under code “S” in the Form 4 insider trading report.

How many Ultra Clean (UCTT) shares does Brian E. Harding own after this Form 4 transaction?

Following the reported sale, Brian E. Harding directly owns 36,631 shares of Ultra Clean Common Stock. This post-transaction holding figure is disclosed in the Form 4 and reflects his remaining direct ownership position.

What does the transaction code “S” mean in the Ultra Clean (UCTT) Form 4 filing?

The transaction code “S” in the Ultra Clean Form 4 indicates a sale in an open market or private transaction. In this case, it describes Brian E. Harding’s open-market sale of 4,000 shares of the company’s Common Stock.

Is Brian E. Harding’s Ultra Clean (UCTT) share sale reported as direct or indirect ownership?

The Form 4 reports the transaction under direct ownership, marked with code “D.” A footnote clarifies that the sale represents directly owned shares, meaning the shares are held in Brian E. Harding’s own name rather than through another entity.