UMC director files initial Form 3 with no trades

UNITED MICROELECTRONICS CORP director Hsu Wen Hsin filed an initial Form 3, which is a statement of beneficial ownership for insiders.

Accepted by SEC EDGAR 03/18/2026 - 06:14 AM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

UNITED MICROELECTRONICS CORP director Hsu Wen Hsin filed an initial Form 3, which is a statement of beneficial ownership for insiders. This filing reports no transactions in the company’s securities, and no derivative positions or holdings are listed in the available data.

FAQ

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What does the UNITED MICROELECTRONICS CORP (UMC) Form 3 filing show?

The Form 3 for UNITED MICROELECTRONICS CORP shows director Hsu Wen Hsin’s initial insider ownership status. It reports no transactions, no exercises, and no derivative positions in the available data, serving as a baseline disclosure of insider holdings with the SEC.

Who is the reporting person in the UMC Form 3 filing?

The reporting person is Hsu Wen Hsin, identified as a director of UNITED MICROELECTRONICS CORP. The filing classifies this individual as a director, not an officer or ten percent owner, and provides an initial statement of beneficial ownership without listing specific transactions.

Does the UMC Form 3 for Hsu Wen Hsin report any insider trades?

No, the Form 3 for Hsu Wen Hsin reports zero insider trades. The transaction summary shows no buys, sells, exercises, gifts, or tax-withholding events, with net buy-sell direction described as neutral and no derivative transactions disclosed in this initial ownership statement.

Are any derivative securities reported in the UMC Form 3 for Hsu Wen Hsin?

No derivative securities are reported in this Form 3. The derivative summary is empty and derivativeTransactionCount is zero, indicating no options, warrants, or other derivative positions are disclosed for director Hsu Wen Hsin in this initial ownership filing.

What does a neutral net buy-sell direction mean in the UMC Form 3?

A neutral net buy-sell direction means there were no net purchases or sales reported. For this UMC Form 3, netBuySellShares is zero and netBuySellDirection is neutral, reflecting that no insider trading activity was disclosed in this initial statement of beneficial ownership.

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

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1. Name and Address of Reporting Person^*

Hsu Wen Hsin

(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)