UMC CEO reports 32,655,440 common shares on Form 3

UNITED MICROELECTRONICS CORP director and Chief Executive Officer Jason Shi Wang filed a Form 3 reporting beneficial ownership of 32,655,440 common shares.

Rhea-AI Filing Summary

UNITED MICROELECTRONICS CORP director and Chief Executive Officer Jason Shi Wang filed a Form 3 reporting beneficial ownership of 32,655,440 common shares. This filing establishes his reported equity position as an insider.

The reported holdings include 14,200,000 common shares pledged as collateral to secure certain obligations and 3,515,400 shares subject to Restricted Stock Awards. A specified number of these RSA shares are scheduled to vest annually on December 5 from 2026 through 2029.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Wang Jason Shi

Role Chief Executive Officer

Type	Security	Shares	Price	Value
holding	Common Shares	--	--	--

Holdings After Transaction: Common Shares — 32,655,440 shares (Direct)

Footnotes (1)

1. F1. Includes 14,200,000 shares of common stock pledged as collateral to secure certain obligations of the reporting person, 3,515,400 shares of Restricted Stock Award (RSA) and a specified number of shares subject to the RSA will vest annually on December 5 from 2026 to 2029.

FAQ

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

How many UNITED MICROELECTRONICS CORP (UMC) shares does Jason Shi Wang report on this Form 3?

Jason Shi Wang reports beneficial ownership of 32,655,440 common shares. This total represents his direct reported equity position in UNITED MICROELECTRONICS CORP as disclosed in the Form 3, providing a baseline view of his stake as a director and Chief Executive Officer.

What portion of Jason Shi Wang’s UMC shares are pledged as collateral?

The filing states that 14,200,000 common shares are pledged as collateral. These pledged shares secure certain obligations of the reporting person, meaning a substantial part of his reported holdings is tied to separate commitments referenced in the footnote disclosure.

How many UMC Restricted Stock Award (RSA) shares does Jason Shi Wang hold?

The disclosure lists 3,515,400 shares of Restricted Stock Award (RSA). These RSA shares are part of his reported common share holdings and are subject to vesting conditions laid out in the footnote, rather than being fully vested at the time of the filing.

What is the vesting schedule for Jason Shi Wang’s UMC Restricted Stock Awards?

The filing notes that a specified number of RSA shares will vest annually on December 5 from 2026 to 2029. This creates a four-year vesting timeline, with incremental portions of the 3,515,400 RSA shares becoming vested each year on that date.

What type of security is reported in Jason Shi Wang’s UMC Form 3 filing?

The security reported is UMC common shares. The Form 3 identifies the class as Common Shares, and all figures in the filing, including pledged shares and Restricted Stock Awards, are presented as part of this common stock class.

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

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

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
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1. Name and Address of Reporting Person^*

Wang Jason Shi

(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
X	Officer (give title below)		Other (specify below)
	Chief Executive Officer

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	32,655,440(1)	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:

1. Includes 14,200,000 shares of common stock pledged as collateral to secure certain obligations of the reporting person, 3,515,400 shares of Restricted Stock Award (RSA) and a specified number of shares subject to the RSA will vest annually on December 5 from 2026 to 2029.

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)