United Microelectronics Corp 6-K, filed Sep 25, 2020

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

OF THE SECURITIES EXCHANGE ACT OF 1934

September 25, 2020

(Commission File Number: 001-15128)

United Microelectronics Corporation

(Translation of registrant’s name into English)

No.3 Li Hsin Road II

Science Park

Hsinchu, Taiwan, R.O.C.

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.

Form 20-F  ☒      Form 40-F  ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101 (b) (1): ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101 (b) (7): ☐

Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes  ☐      No  ☒

If “Yes” is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): n/a

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereto duly authorized.

Date: September 25, 2020

EXHIBIT INDEX

3

umc-ex99_6.htm

www.umc.com

Exhibit

Exhibit            Description

99.1                 Announcement on 2020/09/01: UMC will attend investor conferences on 2020/09/08

99.2                 Announcement on 2020/09/09: August Revenue

99.3                 Announcement on 2020/09/15: the trading and pledge of UMC common shares by directors, executive officers and 10% shareholders of UMC

Exhibit 99.1

UMC will attend investor conferences on 2020/09/08

1. Date of institutional investor conference: 2020/09/08

2. Time of institutional investor conference: 09:00 AM

3. Location of institutional investor conference: Teleconference

4. Outline of institutional investor conference:

The Company will attend the “21st Asian Technology Conference”, held by Credit Suisse.

5. Any other matters that need to be specified: None

Exhibit 99.2

United Microelectronics Corporation

September 9, 2020

This is to report the changes or status of 1) Sales volume, 2) Funds lent to other parties, 3) Endorsements and guarantees, and 4) Financial derivative transactions for the period of August 2020.

All values are in US Dollars.

All values are in US Dollars.

aNot under hedging accounting: NT$ thousand

UMC

Exhibit 99.3

United Microelectronics Corporation

For the month of August, 2020

This is to report 1) the trading of directors, executive officers and 10% shareholders of United Microelectronics Corporation (“UMC”) (NYSE: UMC); 2) the pledge and clear of pledge of UMC common shares by directors, executive officers and 10% shareholders of UMC;