UMC (UMC) director Wang Su-Lin reports 101,000 common shares on Form 3

Rhea-AI Filing Summary

UNITED MICROELECTRONICS CORP director reports initial holdings. Director Wang Su-Lin has reported beneficial ownership of 101,000 Common Shares, held directly, with no specific buy or sell transactions disclosed. This Form 3 mainly establishes the director’s starting ownership position for future insider reporting.

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

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1. Name and Address of Reporting Person^*

Wang Su-Lin

(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)
Common Shares	101,000	D

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.

	/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)

FAQ

What does Wang Su-Lin’s Form 3 filing for UMC show?

The Form 3 shows that director Wang Su-Lin beneficially owns 101,000 Common Shares of United Microelectronics Corp. It is an initial ownership report, not a record of recent share purchases or sales.

Is Wang Su-Lin’s UMC stake on Form 3 held directly or indirectly?

The filing reports direct ownership of the 101,000 Common Shares. The ownership code is listed as “D,” indicating the shares are held directly rather than through a trust, partnership, or other indirect entity.

Does the UMC Form 3 for Wang Su-Lin disclose any recent trades?

No recent trades are disclosed. The Form 3 records a holding entry only, with 101,000 Common Shares reported following the event and no buy, sell, gift, or derivative exercise transactions indicated in the summary data.

Why is United Microelectronics Corp filing a Form 3 for Wang Su-Lin?

A Form 3 is required when someone becomes an insider, such as a director. This filing establishes Wang Su-Lin’s initial beneficial ownership of 101,000 Common Shares in United Microelectronics Corp for ongoing insider reporting obligations.

Does the UMC Form 3 include any derivative securities for Wang Su-Lin?

The filing’s derivative section is empty, indicating no reported options, warrants, or other derivative securities for Wang Su-Lin. Only the 101,000 directly owned Common Shares are listed as beneficially owned after the reporting event.