[Form 3] Ultra Clean Holdings, Inc. Initial Statement of Beneficial Ownership

Rhea-AI Filing Summary

Ultra Clean Holdings officer Jinsong Xiao filed an initial Form 3 reporting his status as Director and Chief Executive Officer of Ultra Clean Holdings, Inc. (UCTT). The filing states no securities are beneficially owned and notes the Form 3 was not timely filed due to an administrative delay. The form is signed by an attorney-in-fact on behalf of Mr. Xiao.

Positive

• Initial disclosure completed identifying the reporting person and roles
• Explicit statement of no beneficial ownership, removing ambiguity about current holdings

Negative

• Form 3 was not timely filed due to an administrative delay

Insights

Securities Compliance Analyst

TL;DR: Officer filed an initial Form 3 reporting zero ownership and cites an administrative delay.

The filing documents that Jinsong Xiao, identified as a Director and Chief Executive Officer, submitted an initial Form 3 for Ultra Clean Holdings, Inc. (UCTT) and explicitly states that no securities are beneficially owned. The disclosure includes a remark about an administrative delay causing a late filing and is executed by an attorney-in-fact. From a compliance perspective, the material facts disclosed are limited and routine: identity, relationship to issuer, and absence of beneficial ownership.

Corporate Governance Specialist

TL;DR: Governance disclosure is minimal; absence of holdings and a late filing are the only notable items.

The Form 3 provides the required initial reporting details for an insider: name, address, roles (Director and CEO), and the statement that no securities are beneficially owned. The filing acknowledges an administrative delay but contains no additional transactions, holdings, or changes in control. This is a routine governance disclosure with limited investor impact.

SEC Form 3

FORM 3

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

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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:			3235-0104
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

Xiao Jinsong

(Last) (First) (Middle)

ULTRA CLEAN HOLDINGS, INC.

26462 CORPORATE AVE.

(Street)

HAYWARD CA 94545

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
09/02/2025

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

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

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

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

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

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

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

Remarks:

Due to an administrative delay, this initial statement of beneficial ownership of securities was not timely filed. No securities are beneficially owned. Exhibit 24 - Power of Attorney

No securities are beneficially owned.

	/s/ Paul Y. Cho, as attorney-in-fact for Jinsong Xiao	09/16/2025
	** 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 5 (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.

FAQ

What did Jinsong Xiao report on the Form 3 for UCTT?

The Form 3 identifies Jinsong Xiao as a Director and Chief Executive Officer and states that no securities are beneficially owned.

Does the Form 3 show any stock or option holdings for UCTT by Jinsong Xiao?

No. The filing explicitly states no securities are beneficially owned.

Was the Form 3 for UCTT filed on time?

No. The filing notes an administrative delay and indicates the initial statement was not timely filed.

Who signed the Form 3 for Jinsong Xiao?

The Form 3 was signed by Paul Y. Cho, as attorney-in-fact for Jinsong Xiao on 09/16/2025.

What roles does the Form 3 list for the reporting person at Ultra Clean Holdings (UCTT)?

The filing lists the reporting person as a Director and Officer with the title Chief Executive Officer.