Ultra Clean counsel sells 944 company shares

Ultra Clean Holdings, Inc. General Counsel and Secretary Paul Yoonku Cho reported an open-market sale of company common stock.

Rhea-AI Filing Summary

Ultra Clean Holdings, Inc. General Counsel and Secretary Paul Yoonku Cho reported an open-market sale of company common stock. On June 2, 2026, he sold 944 shares of common stock at a price of $89.37 per share.

After this transaction, Cho directly holds 22,941 shares of Ultra Clean common stock. This filing records a single, relatively small open-market sale and shows his remaining equity stake in the company following the trade.

Insights

Equity governance analyst

Small, routine open-market sale by an Ultra Clean executive.

General Counsel Paul Yoonku Cho executed an open-market sale of 944 shares of Ultra Clean Holdings, Inc. common stock at $89.37 per share. The transaction is coded as a standard sale in the market rather than a derivative exercise or tax event.

Following the sale, Cho still directly owns 22,941 shares, indicating that only a modest portion of his equity position was sold. With no derivative positions listed and no footnotes indicating a special structure or trading plan, this appears to be a routine liquidity transaction without clear implications for the broader investment thesis.

Insider Trade Summary

Net Seller: 944 shares

Net Sell 1 txn

Insider Cho Paul Yoonku

Role General Counsel and Secretary

Sold 944 shs ($84K)

Type	Security	Shares	Price	Value
Sale	Common Stock	944	$89.37	$84K

Holdings After Transaction: Common Stock — 22,941 shares (Direct)

Key Figures

Shares sold: 944 shares Sale price: $89.37 per share Shares owned after transaction: 22,941 shares

3 metrics

Shares sold 944 shares Open-market sale on June 2, 2026

Sale price $89.37 per share Price for the 944 sold shares

Shares owned after transaction 22,941 shares Direct holdings after June 2, 2026 sale

Key Terms

open-market sale, Common Stock, Form 4

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.

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 Paul Yoonku Cho report?

Paul Yoonku Cho reported an open-market sale of Ultra Clean Holdings common stock. He sold 944 shares at $89.37 per share on June 2, 2026, as disclosed in the Form 4 insider trading report.

How many UCTT shares did Paul Yoonku Cho sell and at what price?

He sold 944 shares of Ultra Clean Holdings common stock at $89.37 per share. This single open-market transaction is the only trade reported in the Form 4 for that date.

How many UCTT shares does Paul Yoonku Cho own after the sale?

After the sale, Paul Yoonku Cho directly owns 22,941 shares of Ultra Clean Holdings common stock. The Form 4 lists this figure as his direct beneficial ownership following the June 2, 2026 transaction.

Was the UCTT insider transaction a buy or a sell?

The insider transaction was a sell. The Form 4 records transaction code “S,” indicating an open-market sale of 944 shares of Ultra Clean Holdings common stock by General Counsel Paul Yoonku Cho.

Does the UCTT Form 4 show any derivative securities for Paul Yoonku Cho?

No derivative securities are listed for Paul Yoonku Cho in this Form 4. The filing reports only a non-derivative transaction involving common stock and shows no remaining options or other derivative positions.

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

Form 4 Insider Transactions: What Each Field Means →

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Accepted by SEC EDGAR 06/04/2026 - 07:36 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^*

Cho Paul Yoonku

(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)
	General Counsel and Secretary

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/02/2026

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	06/02/2026		S		944	D	$89.37	22,941	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:

	/s/ Paul Y. Cho	06/04/2026
	** 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)