United Microelectronics director files Form 3

United Microelectronics Corp filed an initial insider ownership report for Chen Lih-Juann, identifying this person as a director of the company.

Accepted by SEC EDGAR 03/18/2026 - 06:10 AM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

United Microelectronics Corp filed an initial insider ownership report for Chen Lih-Juann, identifying this person as a director of the company. The Form 3 does not list any equity transactions, exercises, gifts, or other movements in United Microelectronics shares.

FAQ

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

What does the United Microelectronics Corp (UMC) Form 3 for Chen Lih-Juann show?

The Form 3 for United Microelectronics Corp lists Chen Lih-Juann as a director and provides an initial insider ownership report. It does not include any share purchases, sales, or other equity transactions in UMC common stock.

Does the UMC Form 3 for Chen Lih-Juann report any stock trades?

No, the Form 3 for Chen Lih-Juann reports no stock trades in United Microelectronics Corp shares. The transaction summary shows zero buys, zero sells, and no derivative exercises, gifts, tax withholdings, or restructurings.

What insider role is disclosed for Chen Lih-Juann at United Microelectronics Corp (UMC)?

Chen Lih-Juann is disclosed as a director of United Microelectronics Corp. The filing flags this role specifically, while indicating that Chen is not reported as an officer or a ten percent beneficial owner of UMC shares in this Form 3.

Are there any derivative securities or options reported for Chen Lih-Juann in the UMC Form 3?

No derivative securities or options are reported for Chen Lih-Juann in this Form 3. The derivative summary is empty and the transaction summary shows zero derivative transactions or exercises related to United Microelectronics Corp.

Does the UMC Form 3 for Chen Lih-Juann include any explanatory footnotes?

The Form 3 includes a footnotes section, but there are no substantive footnote details provided in the available data. There is no additional disclosure about voting power, investment authority, or indirect ownership structures for Chen Lih-Juann.

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

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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^*

Chen Lih-Juann

(Last) (First) (Middle)

8F, NO.68, SEC. 1, NEIHU RD.,

(Street)

TAIPEI TAIWAN 11493

(City) (State) (Zip)

TAIWAN, PROVINCE OF CHINA

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
03/18/2026

3. Issuer Name and Ticker or Trading Symbol
UNITED MICROELECTRONICS CORP [ UMC ]

3a. Foreign Trading Symbol
[2,303]

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

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

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

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:

Exhibit 24 Power of Attorney.

No securities are beneficially owned.

	/s/Chitung Liu, attorney-in-fact	03/18/2026
	** 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 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.
* Form 3: SEC 1473 (03-26)