To announce related materials on acquisition of machinery and equipment

1. Name and nature of the underlying asset (e.g., land located at Sublot XX, Lot XX, North District, Taichung City): Machinery and equipment

2. Date of occurrence of the event: 2021/07/12~2021/07/29

3. Transaction unit amount (e.g. XX square meters, equivalent to XX ping), unit price, and total transaction price:

Transaction volume: one batch;

average unit price: NT$1,699,824,093;

total transaction price: NT$1,699,824,093

4. Trading counterparty and its relationship with the Company (if the trading counterparty is a natural person and furthermore is not a related party of the Company, the name of the trading counterparty is not required to be disclosed):

TOKYO ELECTRON LIMITED; non-related party transaction

5. Where the trading counterparty is a related party, announcement shall also be made of the reason for choosing the related party as trading counterparty and the identity of the previous owner, its relationship with the Company and the trading counterparty, and the previous date and monetary amount of transfer: NA

6. Where an owner of the underlying assets within the past five years has been a related party of the Company, the announcement shall also include the date and price of acquisition and disposal by the related party, and its relationship with the Company at the time of the transaction: NA

7. Projected gain (or loss) through disposal (not applicable for acquisition of assets; those with deferral should provide a table explaining recognition): NA

8. Terms of delivery or payment (including payment period and monetary amount), restrictive covenants in the contract, and other important terms and conditions: Base on purchase order payment term.

9. The manner of deciding on this transaction (such as invitation to tender, price comparison, or price negotiation), the reference basis for the decision on price, and the decision-making unit:

transaction: price negotiation;

the reference basis for the decision on price: market price;

the decision-making department: the Selection Meeting.

10. Name of the professional appraisal firm or company and its appraisal price: NA

11. Name of the professional appraiser: NA

12. Practice certificate number of the professional appraiser: NA

13. The appraisal report has a limited price, specific price, or special price: NA

14. An appraisal report has not yet been obtained: NA

15. Reason for an appraisal report not being obtained: NA

16. Reason for any significant discrepancy with the appraisal reports and opinion of the CPA: NA

17. Name of the CPA firm:NA

18. Name of the CPA: NA

19. Practice certificate number of the CPA: NA

20. Broker and broker's fee: None

21. Concrete purpose or use of the acquisition or disposal: For production

22. Any dissenting opinions of directors to the present transaction: NA

23. Whether the counterparty of the current transaction is a related party: No

24. Date of the board of directors' resolution: NA

25. Date of ratification by supervisors or approval by the audit committee: NA

26. The transaction is to acquire a real property or right-of-use asset from a related party: NA

27. The price assessed in accordance with the Article 16 of the Regulations Governing the Acquisition and Disposal of Assets by Public Companies: NA

28. Where the above assessed price is lower than the transaction price, the price assessed in accordance with the Article 17 of the same regulations: NA

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

To announce related materials on acquisition of machinery and equipment

1. Name and nature of the underlying asset (e.g., land located at Sublot XX, Lot XX, North District, Taichung City): Machinery and equipment

2. Date of occurrence of the event: 2021/07/28~2021/07/30

3. Transaction unit amount (e.g. XX square meters, equivalent to XX ping), unit price, and total transaction price:

Transaction volume: one batch;

average unit price: NT$2,277,785,280;

total transaction price: NT$2,277,785,280

4. Trading counterparty and its relationship with the Company (if the trading counterparty is a natural person and furthermore is not a related party of the Company, the name of the trading counterparty is not required to be disclosed):

LAM RESEARCH INTERNATIONAL SARL; non-related party transaction

5. Where the trading counterparty is a related party, announcement shall also be made of the reason for choosing the related party as trading counterparty and the identity of the previous owner, its relationship with the Company and the trading counterparty, and the previous date and monetary amount of transfer: NA

6. Where an owner of the underlying assets within the past five years has been a related party of the Company, the announcement shall also include the date and price of acquisition and disposal by the related party, and its relationship with the Company at the time of the transaction: NA

7. Projected gain (or loss) through disposal (not applicable for acquisition of assets; those with deferral should provide a table explaining recognition): NA

8. Terms of delivery or payment (including payment period and monetary amount), restrictive covenants in the contract, and other important terms and conditions: Base on purchase order payment term

9. The manner of deciding on this transaction (such as invitation to tender, price comparison, or price negotiation), the reference basis for the decision on price, and the decision-making unit:

transaction: price negotiation;

the reference basis for the decision on price: market price;

the decision-making department: the Selection Meeting

10. Name of the professional appraisal firm or company and its appraisal price: NA

11. Name of the professional appraiser: NA

12. Practice certificate number of the professional appraiser: NA

13. The appraisal report has a limited price, specific price, or special price: NA

14. An appraisal report has not yet been obtained: NA

15. Reason for an appraisal report not being obtained: NA

16. Reason for any significant discrepancy with the appraisal reports and opinion of the CPA: NA

17. Name of the CPA firm:NA

18. Name of the CPA: NA

19. Practice certificate number of the CPA: NA

20. Broker and broker's fee: None

21. Concrete purpose or use of the acquisition or disposal: For production

22. Any dissenting opinions of directors to the present transaction: NA

23. Whether the counterparty of the current transaction is a related party: No

24. Date of the board of directors' resolution: NA

25. Date of ratification by supervisors or approval by the audit committee: NA

26. The transaction is to acquire a real property or right-of-use asset from a related party: NA

27. The price assessed in accordance with the Article 16 of the Regulations Governing the Acquisition and Disposal of Assets by Public Companies: NA

28. Where the above assessed price is lower than the transaction price, the price assessed in accordance with the Article 17 of the same regulations: NA

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

To announce related materials on acquisition of facilities

1. Name and nature of the underlying asset (e.g., land located at Sublot XX, Lot XX, North District, Taichung City): facilities

2. Date of occurrence of the event: 2021/02/22~2021/08/02

3. Transaction unit amount (e.g. XX square meters, equivalent to XX ping), unit price, and total transaction price:

Transaction volume: one batch;

average unit price: NT$6,151,800,000;

total transaction price: NT$6,151,800,000

4. Trading counterparty and its relationship with the Company (if the trading counterparty is a natural person and furthermore is not a related party of the Company, the name of the trading counterparty is not required to be disclosed):

L&K ENGINEERING CO., LTD.; non-related party transaction

5. Where the trading counterparty is a related party, announcement shall also be made of the reason for choosing the related party as trading counterparty and the identity of the previous owner, its relationship with the Company and the trading counterparty, and the previous date and monetary amount of transfer: NA

6. Where an owner of the underlying assets within the past five years has been a related party of the Company, the announcement shall also include the date and price of acquisition and disposal by the related party, and its relationship with the Company at the time of the transaction: NA

7. Projected gain (or loss) through disposal (not applicable for acquisition of assets; those with deferral should provide a table explaining recognition): NA

8. Terms of delivery or payment (including payment period and monetary amount), restrictive covenants in the contract, and other important terms and conditions: Base on purchase order payment term

9. The manner of deciding on this transaction (such as invitation to tender, price comparison, or price negotiation), the reference basis for the decision on price, and the decision-making unit:

transaction: price negotiation;

the reference basis for the decision on price: market price;

the decision-making department: the Selection Meeting

10. Name of the professional appraisal firm or company and its appraisal price: NA

11. Name of the professional appraiser: NA

12. Practice certificate number of the professional appraiser: NA

13. The appraisal report has a limited price, specific price, or special price: NA

14. An appraisal report has not yet been obtained: NA

15. Reason for an appraisal report not being obtained: NA

16. Reason for any significant discrepancy with the appraisal reports and opinion of the CPA: NA

17. Name of the CPA firm:NA

18. Name of the CPA: NA

19. Practice certificate number of the CPA: NA

20. Broker and broker's fee: None

21. Concrete purpose or use of the acquisition or disposal: For production

22. Any dissenting opinions of directors to the present transaction: NA

23. Whether the counterparty of the current transaction is a related party: No

24. Date of the board of directors' resolution: NA

25. Date of ratification by supervisors or approval by the audit committee: NA

26. The transaction is to acquire a real property or right-of-use asset from a related party: NA

27. The price assessed in accordance with the Article 16 of the Regulations Governing the Acquisition and Disposal of Assets by Public Companies: NA

28. Where the above assessed price is lower than the transaction price, the price assessed in accordance with the Article 17 of the same regulations: NA

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

To announce related materials on acquisition of machinery and equipment

1. Name and nature of the underlying asset (e.g., land located at Sublot XX, Lot XX, North District, Taichung City): Machinery and equipment

2. Date of occurrence of the event: 2021/08/06~2021/08/09

3. Transaction unit amount (e.g. XX square meters, equivalent to XX ping), unit price, and total transaction price:

Transaction volume: one batch;

average unit price: NT$1,648,328,040;

total transaction price: NT$1,648,328,040

4. Trading counterparty and its relationship with the Company (if the trading counterparty is a natural person and furthermore is not a related party of the Company, the name of the trading counterparty is not required to be disclosed):

Lam Research International Sdn. Bhd.; non-related party transaction

5. Where the trading counterparty is a related party, announcement shall also be made of the reason for choosing the related party as trading counterparty and the identity of the previous owner, its relationship with the Company and the trading counterparty, and the previous date and monetary amount of transfer: NA

6. Where an owner of the underlying assets within the past five years has been a related party of the Company, the announcement shall also include the date and price of acquisition and disposal by the related party, and its relationship with the Company at the time of the transaction: NA

7. Projected gain (or loss) through disposal (not applicable for acquisition of assets; those with deferral should provide a table explaining recognition): NA

8. Terms of delivery or payment (including payment period and monetary amount), restrictive covenants in the contract, and other important terms and conditions: Base on purchase order payment term

9. The manner of deciding on this transaction (such as invitation to tender, price comparison, or price negotiation), the reference basis for the decision on price, and the decision-making unit:

transaction: price negotiation;

the reference basis for the decision on price: market price;

the decision-making department: the Selection Meeting

10. Name of the professional appraisal firm or company and its appraisal price: NA

11. Name of the professional appraiser: NA

12. Practice certificate number of the professional appraiser: NA

13. The appraisal report has a limited price, specific price, or special price: NA

14. An appraisal report has not yet been obtained: NA

15. Reason for an appraisal report not being obtained: NA

16. Reason for any significant discrepancy with the appraisal reports and opinion of the CPA: NA

17. Name of the CPA firm:NA

18. Name of the CPA: NA

19. Practice certificate number of the CPA: NA

20. Broker and broker's fee: None

21. Concrete purpose or use of the acquisition or disposal: For production

22. Any dissenting opinions of directors to the present transaction: NA

23. Whether the counterparty of the current transaction is a related party: No

24. Date of the board of directors' resolution: NA

25. Date of ratification by supervisors or approval by the audit committee: NA

26. The transaction is to acquire a real property or right-of-use asset from a related party: NA

27. The price assessed in accordance with the Article 16 of the Regulations Governing the Acquisition and Disposal of Assets by Public Companies: NA

28. Where the above assessed price is lower than the transaction price, the price assessed in accordance with the Article 17 of the same regulations: NA

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

UMC will attend investor conferences on 2021/08/17

1. Date of institutional investor conference: 2021/08/17

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 'TWN Semis, Foundry, OSAT, IC Design Supply Chain Virtual Day', held by Goldman Sachs.

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

To announce related materials on acquisition of machinery and equipment

1. Name and nature of the underlying asset (e.g., land located at Sublot XX, Lot XX, North District, Taichung City): Machinery and equipment

2. Date of occurrence of the event: 2021/07/22~2021/08/12

3. Transaction unit amount (e.g. XX square meters, equivalent to XX ping), unit price, and total transaction price:

Transaction volume: one batch;

average unit price: NT$1,059,255,250;

total transaction price: NT$1,059,255,250

4. Trading counterparty and its relationship with the Company (if the trading counterparty is a natural person and furthermore is not a related party of the Company, the name of the trading counterparty is not required to be disclosed):

Applied Materials South East Asia Pte. Ltd.; non-related party transaction

5. Where the trading counterparty is a related party, announcement shall also be made of the reason for choosing the related party as trading counterparty and the identity of the previous owner, its relationship with the Company and the trading counterparty, and the previous date and monetary amount of transfer: NA

6. Where an owner of the underlying assets within the past five years has been a related party of the Company, the announcement shall also include the date and price of acquisition and disposal by the related party, and its relationship with the Company at the time of the transaction: NA

7. Projected gain (or loss) through disposal (not applicable for acquisition of assets; those with deferral should provide a table explaining recognition): NA

8. Terms of delivery or payment (including payment period and monetary amount), restrictive covenants in the contract, and other important terms and conditions: Base on purchase order payment term

9. The manner of deciding on this transaction (such as invitation to tender, price comparison, or price negotiation), the reference basis for the decision on price, and the decision-making unit:

transaction: price negotiation;

the reference basis for the decision on price: market price;

the decision-making department: the Selection Meeting

10. Name of the professional appraisal firm or company and its appraisal price: NA

11. Name of the professional appraiser: NA

12. Practice certificate number of the professional appraiser: NA

13. The appraisal report has a limited price, specific price, or special price: NA

14. An appraisal report has not yet been obtained: NA

15. Reason for an appraisal report not being obtained: NA

16. Reason for any significant discrepancy with the appraisal reports and opinion of the CPA: NA

17. Name of the CPA firm:NA

18. Name of the CPA: NA

19. Practice certificate number of the CPA: NA

20. Broker and broker's fee: None

21. Concrete purpose or use of the acquisition or disposal: For production

22. Any dissenting opinions of directors to the present transaction: NA

23. Whether the counterparty of the current transaction is a related party: No

24. Date of the board of directors' resolution: NA

25. Date of ratification by supervisors or approval by the audit committee: NA

26. The transaction is to acquire a real property or right-of-use asset from a related party: NA

27. The price assessed in accordance with the Article 16 of the Regulations Governing the Acquisition and Disposal of Assets by Public Companies: NA

28. Where the above assessed price is lower than the transaction price, the price assessed in accordance with the Article 17 of the same regulations: NA

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

To announce related materials on acquisition of machinery and equipment

1. Name and nature of the underlying asset (e.g., land located at Sublot XX, Lot XX, North District, Taichung City): Machinery and equipment

2. Date of occurrence of the event: 2021/08/11~2021/08/12

3. Transaction unit amount (e.g. XX square meters, equivalent to XX ping), unit price, and total transaction price:

Transaction volume: one batch;

average unit price: NT$1,031,441,440;

total transaction price: NT$1,031,441,440

4. Trading counterparty and its relationship with the Company (if the trading counterparty is a natural person and furthermore is not a related party of the Company, the name of the trading counterparty is not required to be disclosed):

Lam Research International Sdn. Bhd.; non-related party transaction

5. Where the trading counterparty is a related party, announcement shall also be made of the reason for choosing the related party as trading counterparty and the identity of the previous owner, its relationship with the Company and the trading counterparty, and the previous date and monetary amount of transfer: NA

6. Where an owner of the underlying assets within the past five years has been a related party of the Company, the announcement shall also include the date and price of acquisition and disposal by the related party, and its relationship with the Company at the time of the transaction: NA

7. Projected gain (or loss) through disposal (not applicable for acquisition of assets; those with deferral should provide a table explaining recognition): NA

8. Terms of delivery or payment (including payment period and monetary amount), restrictive covenants in the contract, and other important terms and conditions: Base on purchase order payment term

9. The manner of deciding on this transaction (such as invitation to tender, price comparison, or price negotiation), the reference basis for the decision on price, and the decision-making unit:

transaction: price negotiation;

the reference basis for the decision on price: market price;

the decision-making department: the Selection Meeting

10. Name of the professional appraisal firm or company and its appraisal price: NA

11. Name of the professional appraiser: NA

12. Practice certificate number of the professional appraiser: NA

13. The appraisal report has a limited price, specific price, or special price: NA

14. An appraisal report has not yet been obtained: NA

15. Reason for an appraisal report not being obtained: NA

16. Reason for any significant discrepancy with the appraisal reports and opinion of the CPA: NA

17. Name of the CPA firm:NA

18. Name of the CPA: NA

19. Practice certificate number of the CPA: NA

20. Broker and broker's fee: None

21. Concrete purpose or use of the acquisition or disposal: For production

22. Any dissenting opinions of directors to the present transaction: NA

23. Whether the counterparty of the current transaction is a related party: No

24. Date of the board of directors' resolution: NA

25. Date of ratification by supervisors or approval by the audit committee: NA

26. The transaction is to acquire a real property or right-of-use asset from a related party: NA

27. The price assessed in accordance with the Article 16 of the Regulations Governing the Acquisition and Disposal of Assets by Public Companies: NA

28. Where the above assessed price is lower than the transaction price, the price assessed in accordance with the Article 17 of the same regulations: NA

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

To announce related materials on acquisition of machinery and equipment

1. Name and nature of the underlying asset (e.g., land located at Sublot XX, Lot XX, North District, Taichung City): Machinery and equipment

2. Date of occurrence of the event: 2021/08/12~2021/08/13

3. Transaction unit amount (e.g. XX square meters, equivalent to XX ping), unit price, and total transaction price:

Transaction volume: one batch;

average unit price: NT$2,463,309,158;

total transaction price: NT$2,463,309,158

4. Trading counterparty and its relationship with the Company (if the trading counterparty is a natural person and furthermore is not a related party of the Company, the name of the trading counterparty is not required to be disclosed):

ASML HONG KONG LIMITED TAIWAN BRANCH (HONG KONG); non-related party transaction

5. Where the trading counterparty is a related party, announcement shall also be made of the reason for choosing the related party as trading counterparty and the identity of the previous owner, its relationship with the Company and the trading counterparty, and the previous date and monetary amount of transfer: NA

6. Where an owner of the underlying assets within the past five years has been a related party of the Company, the announcement shall also include the date and price of acquisition and disposal by the related party, and its relationship with the Company at the time of the transaction: NA

7. Projected gain (or loss) through disposal (not applicable for acquisition of assets; those with deferral should provide a table explaining recognition): NA

8. Terms of delivery or payment (including payment period and monetary amount), restrictive covenants in the contract, and other important terms and conditions: Base on purchase order payment term

9. The manner of deciding on this transaction (such as invitation to tender, price comparison, or price negotiation), the reference basis for the decision on price, and the decision-making unit:

transaction: price negotiation;

the reference basis for the decision on price: market price;

the decision-making department: the Selection Meeting

10. Name of the professional appraisal firm or company and its appraisal price: NA

11. Name of the professional appraiser: NA

12. Practice certificate number of the professional appraiser: NA

13. The appraisal report has a limited price, specific price, or special price: NA

14. An appraisal report has not yet been obtained: NA

15. Reason for an appraisal report not being obtained: NA

16. Reason for any significant discrepancy with the appraisal reports and opinion of the CPA:NA

17. Name of the CPA firm: NA

18. Name of the CPA: NA

19. Practice certificate number of the CPA: NA

20. Broker and broker's fee: None

21. Concrete purpose or use of the acquisition or disposal: For production

22. Any dissenting opinions of directors to the present transaction: NA

23. Whether the counterparty of the current transaction is a related party: No

24. Date of the board of directors' resolution: NA

25. Date of ratification by supervisors or approval by the audit committee: NA

26. The transaction is to acquire a real property or right-of-use asset from a related party: NA

27. The price assessed in accordance with the Article 16 of the Regulations Governing the Acquisition and Disposal of Assets by Public Companies: NA

28. Where the above assessed price is lower than the transaction price, the price assessed in accordance with the Article 17 of the same regulations: NA

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

To announce related materials on acquisition of machinery and equipment

1. Name and nature of the underlying asset (e.g., land located at Sublot XX, Lot XX, North District, Taichung City): Machinery and equipment

2. Date of occurrence of the event: 2021/08/13~2021/08/16

3. Transaction unit amount (e.g. XX square meters, equivalent to XX ping), unit price, and total transaction price:

Transaction volume: one batch;

average unit price: NT$2,275,401,500;

total transaction price: NT$2,275,401,500

4. Trading counterparty and its relationship with the Company (if the trading counterparty is a natural person and furthermore is not a related party of the Company, the name of the trading counterparty is not required to be disclosed):

Applied Materials South East Asia Pte. Ltd.; non-related party transaction

5. Where the trading counterparty is a related party, announcement shall also be made of the reason for choosing the related party as trading counterparty and the identity of the previous owner, its relationship with the Company and the trading counterparty, and the previous date and monetary amount of transfer: NA

6. Where an owner of the underlying assets within the past five years has been a related party of the Company, the announcement shall also include the date and price of acquisition and disposal by the related party, and its relationship with the Company at the time of the transaction: NA

7. Projected gain (or loss) through disposal (not applicable for acquisition of assets; those with deferral should provide a table explaining recognition): NA

8. Terms of delivery or payment (including payment period and monetary amount), restrictive covenants in the contract, and other important terms and conditions: Base on purchase order payment term

9. The manner of deciding on this transaction (such as invitation to tender, price comparison, or price negotiation), the reference basis for the decision on price, and the decision-making unit:

transaction: price negotiation;

the reference basis for the decision on price: market price;

the decision-making department: the Selection Meeting

10. Name of the professional appraisal firm or company and its appraisal price: NA

11. Name of the professional appraiser: NA

12. Practice certificate number of the professional appraiser: NA

13. The appraisal report has a limited price, specific price, or special price: NA

14. An appraisal report has not yet been obtained: NA

15. Reason for an appraisal report not being obtained: NA

16. Reason for any significant discrepancy with the appraisal reports and opinion of the CPA: NA

17. Name of the CPA firm:NA

18. Name of the CPA: NA

19. Practice certificate number of the CPA: NA

20. Broker and broker's fee: None

21. Concrete purpose or use of the acquisition or disposal: For production

22. Any dissenting opinions of directors to the present transaction: NA

23. Whether the counterparty of the current transaction is a related party: No

24. Date of the board of directors' resolution: NA

25. Date of ratification by supervisors or approval by the audit committee: NA

26. The transaction is to acquire a real property or right-of-use asset from a related party: NA

27. The price assessed in accordance with the Article 16 of the Regulations Governing the Acquisition and Disposal of Assets by Public Companies: NA

28. Where the above assessed price is lower than the transaction price, the price assessed in accordance with the Article 17 of the same regulations: NA

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

To announce related materials on acquisition of machinery and equipment

1. Name and nature of the underlying asset (e.g., land located at Sublot XX, Lot XX, North District, Taichung City): Machinery and equipment

2. Date of occurrence of the event: 2021/08/18~2021/08/20

3. Transaction unit amount (e.g. XX square meters, equivalent to XX ping), unit price, and total transaction price:

Transaction volume: one batch;

average unit price: NT$3,934,975,700;

total transaction price: NT$3,934,975,700

4. Trading counterparty and its relationship with the Company (if the trading counterparty is a natural person and furthermore is not a related party of the Company, the name of the trading counterparty is not required to be disclosed):

Applied Materials South East Asia Pte. Ltd.; non-related party transaction

5. Where the trading counterparty is a related party, announcement shall also be made of the reason for choosing the related party as trading counterparty and the identity of the previous owner, its relationship with the Company and the trading counterparty, and the previous date and monetary amount of transfer: NA

6. Where an owner of the underlying assets within the past five years has been a related party of the Company, the announcement shall also include the date and price of acquisition and disposal by the related party, and its relationship with the Company at the time of the transaction: NA

7. Projected gain (or loss) through disposal (not applicable for acquisition of assets; those with deferral should provide a table explaining recognition): NA

8. Terms of delivery or payment (including payment period and monetary amount), restrictive covenants in the contract, and other important terms and conditions: Base on purchase order payment term

9. The manner of deciding on this transaction (such as invitation to tender, price comparison, or price negotiation), the reference basis for the decision on price, and the decision-making unit:

transaction: price negotiation;

the reference basis for the decision on price: market price;

the decision-making department: the Selection Meeting

10. Name of the professional appraisal firm or company and its appraisal price: NA

11. Name of the professional appraiser: NA

12. Practice certificate number of the professional appraiser: NA

13. The appraisal report has a limited price, specific price, or special price: NA

14. An appraisal report has not yet been obtained: NA

15. Reason for an appraisal report not being obtained: NA

16. Reason for any significant discrepancy with the appraisal reports and opinion of the CPA: NA

17. Name of the CPA firm:NA

18. Name of the CPA: NA

19. Practice certificate number of the CPA: NA

20. Broker and broker's fee: None

21. Concrete purpose or use of the acquisition or disposal: For production

22. Any dissenting opinions of directors to the present transaction: NA

23. Whether the counterparty of the current transaction is a related party: No

24. Date of the board of directors' resolution: NA

25. Date of ratification by supervisors or approval by the audit committee: NA

26. The transaction is to acquire a real property or right-of-use asset from a related party: NA

27. The price assessed in accordance with the Article 16 of the Regulations Governing the Acquisition and Disposal of Assets by Public Companies: NA

28. Where the above assessed price is lower than the transaction price, the price assessed in accordance with the Article 17 of the same regulations: NA

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

United Microelectronics Corporation

August 5, 2021

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 July 2021.

1)

Sales volume (NT$ Thousand)

Period

Items

2021

2020

Changes

%

July

Net sales

18,366,122

15,494,823

2,871,299

18.53%

Year-to-Date

Net sales

116,370,875

102,148,930

14,221,945

13.92%

2)

Funds lent to other parties (NT$ Thousand)

Balance as of period end

This Month

(actual amount provided)

Last Month

(actual amount provided)

Limit of lending

UMC (Note1)

4,743,000

4,727,700

24,008,593

UMC (Note2)

500,000

500,000

24,008,593

Note1: On December 16, 2020, the board of directors resolved to lend funds to USC(Xiamen) for the amount up to US$ 170 million. The actual amount lent to USC(Xiamen) as of July 31, 2021 was US$ 0 million.

Note2: On April 28, 2021, the board of directors resolved to lend funds to Wavetek for the amount up to NT$ 500 million. The actual amount lent to Wavetek as of July 31, 2021 was NT$ 500 million.

3)

Endorsements and guarantees (NT$ Thousand)

Balance as of period end

This Month

(actual amount provided)

Last Month

(actual amount provided)

Limit of lending

UMC

17,988,476

18,754,675

108,038,667

Note: On February 22, 2017, March 7, 2018, October 24, 2018, July 24,2019, December 18, 2019, July 29, 2020, October 29, 2020, December 16, 2020 and July 28, 2021, the board of directors resolved to provide endorsement to USC(Xiamen)'s syndicated loan from banks for the amount up to US$ 341 million and CNY¥ 1,969 million.

4)

Financial derivatives transactions :

aNot under hedging accounting: NT$ thousand

UMC

Financial instruments

Option

Forwards

IRS

Put

Call

Deposit Paid

0

0

0

0

Royalty Income (Paid)

0

0

0

0

Unwritten-off Trading

Contracts

0

0

3,292,200

0

Fair Value

0

0

8,452

0

Net profit (loss) from Fair Value

0

0

8,394

0

Written-off Trading

Contracts

0

0

13,550,079

0

Realized profit (loss)

0

0

(3,225)

0

United Microelectronics Corporation

For the month of July, 2021

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;

1)

The trading of directors, executive officers and 10% shareholders

Title

Name

Number of shares as of June 30, 2021

Number of shares as of July 31, 2021

Changes

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--

--

--

--

2)

The pledge and clear of pledge of UMC common shares by directors, executive officers and 10% shareholders:

Title

Name

Number of shares as of June 30, 2021

Number of shares as of July 31, 2021

Changes

--

--

--

--

--

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UMC - United Microelectronics Corporation published this content on 25 August 2021 and is solely responsible for the information contained therein. Distributed by Public, unedited and unaltered, on 25 August 2021 10:16:07 UTC.