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Significant Related Party Transactions | 12 Months Ended
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Dec. 31, 2023
Disclosure of transactions between related parties [abstract] |
Significant Related Party Transactions |
7. | SIGNIFICANT RELATED PARTY TRANSACTIONS
| a. | Significant intercompany transactions between consolidated entities were as follows:
For the year ended December 31, 2021
Entity |  | Counterparty |  | Transactions (Note A)
| Account |  | Amount |  |  | Terms (Note B)
|  |  |  |  |  | NT$ |  |  |
|  |  |  |  |  | (In Thousands) |  |  |
UMC |  | UMC-USA |  | Sales |  | $ | 48,440,369 |  |  | Net 60 days
UMC |  | UMC-USA |  | Accounts receivable |  |  | 6,286,428 |  |  | —
UMC |  | USCXM |  | Sales |  |  | 1,222,320 (Note C | ) |  | Net 30 days
UMC |  | USCXM |  | Accounts receivable |  |  | 29,012 |  |  | —
UMC |  | UDS |  | Sales |  |  | 178,331 |  |  | Net 30 days
UMC |  | UDS |  | Accounts receivable |  |  | 18,818 |  |  | —
USJC |  | UMC-USA |  | Sales |  |  | 2,917,993 |  |  | Net 60 days
USJC |  | UMC-USA |  | Accounts receivable |  |  | 428,363 |  |  | —
USCXM |  | UMC-USA |  | Sales |  |  | 1,444,736 |  |  | Net 60 days
USCXM |  | UMC-USA |  | Accounts receivable |  |  | 221,375 |  |  | —
WAVETEK |  | UMC-USA |  | Sales |  |  | 545,785 |  |  | Net 60 days
WAVETEK |  | UMC-USA |  | Accounts receivable |  |  | 126,580 |  |  | —
WAVETEK |  | UMC |  | Sales |  |  | 110,620 |  |  | Month-end 30 days
HJ |  | UMC-USA |  | Sales |  |  | 366,968 |  |  | Net 60 days
HJ |  | UMC-USA |  | Accounts receivable |  |  | 60,147 |  |  | —
For the year ended December 31, 2022
Entity |  | Counterparty |  | Transactions (Note A)
| Account |  | Amount |  |  | Terms (Note B)
|  |  |  |  |  | NT$ |  |  |
|  |  |  |  |  | (In Thousands) |  |  |
UMC |  | UMC-USA |  | Sales |  | $ | 68,554,072 |  |  | Net 60 days
UMC |  | UMC-USA |  | Accounts receivable |  |  | 9,502,922 |  |  | —
UMC |  | USCXM |  | Sales |  |  | 1,143,280 (Note C | ) |  | Net 30 days
UMC |  | USCXM |  | Accounts receivable |  |  | 16,774 |  |  | —
UMC |  | UDS |  | Sales |  |  | 656,472 |  |  | Net 30 days
UMC |  | UDS |  | Accounts receivable |  |  | 6,734 |  |  | —
UMC |  | USJC |  | Sales |  |  | 164,855 |  |  | Net 60 days
UMC |  | USJC |  | Accounts receivable |  |  | 151,430 |  |  | —
USJC |  | UMC-USA |  | Sales |  |  | 4,272,900 |  |  | Net 60 days
USJC |  | UMC-USA |  | Accounts receivable |  |  | 744,082 |  |  | —
USCXM |  | UMC-USA |  | Sales |  |  | 1,565,670 |  |  | Net 60 days
USCXM |  | UMC-USA |  | Accounts receivable |  |  | 310,431 |  |  | —
USCXM |  | UMC |  | Sales |  |  | 1,035,407 |  |  | Net 30 days - Net 45 days
USCXM |  | UMC |  | Accounts receivable |  |  | 173 |  |  | —
USCXM |  | UDS |  | Sales |  |  | 148,259 |  |  | Month-end 30 days
USCXM |  | UDS |  | Accounts receivable |  |  | 171 |  |  | —
WAVETEK |  | UMC-USA |  | Sales |  |  | 716,357 |  |  | Net 60 days
WAVETEK |  | UMC-USA |  | Accounts receivable |  |  | 81,819 |  |  | —
WAVETEK |  | UMC |  | Sales |  |  | 124,178 |  |  | Month-end 30 days
HJ |  | UMC-USA |  | Sales |  |  | 551,913 |  |  | Net 60 days
HJ |  | UMC-USA |  | Accounts receivable |  |  | 147,265 |  |  | —
HJ |  | UDS |  | Sales |  |  | 311,972 |  |  | Month-end 30 days
HJ |  | UDS |  | Accounts receivable |  |  | 9,500 |  |  | —
For the year ended December 31, 2023
Entity |  | Counterparty |  | Transactions (Note A)
| Account |  | Amount |  |  | Terms (Note B)
|  |  |  |  |  | NT$ |  |  |
|  |  |  |  |  | (In Thousands) |  |  |
UMC |  | UMC-USA |  | Sales |  | $ | 61,923,652 |  |  | Net 60 days
UMC |  | UMC-USA |  | Accounts receivable |  |  | 5,827,800 |  |  | —
UMC |  | USCXM |  | Sales |  |  | 1,127,275 (Note C | ) |  | Net 30 days
UMC |  | USCXM |  | Accounts receivable |  |  | 11,688 |  |  | —
UMC |  | UDS |  | Sales |  |  | 364,948 |  |  | Net 30 days
UMC |  | UDS |  | Accounts receivable |  |  | 10,800 |  |  | —
USJC |  | UMC-USA |  | Sales |  |  | 3,487,292 |  |  | Net 60 days
USJC |  | UMC-USA |  | Accounts receivable |  |  | 342,835 |  |  | —
USCXM |  | UMC-USA |  | Sales |  |  | 1,208,630 |  |  | Net 60 days
USCXM |  | UMC-USA |  | Accounts receivable |  |  | 17,816 |  |  | —
USCXM |  | UMC |  | Sales |  |  | 134,303 |  |  | Net 30 days - Net 45 days
USCXM |  | UDS |  | Sales |  |  | 286,087 |  |  | Month-end 30 days
USCXM |  | UDS |  | Accounts receivable |  |  | 362 |  |  | —
WAVETEK |  | UMC-USA |  | Sales |  |  | 505,806 |  |  | Net 60 days
WAVETEK |  | UMC-USA |  | Accounts receivable |  |  | 53,916 |  |  | —
HJ |  | UMC-USA |  | Sales |  |  | 384,067 |  |  | Net 60 days
HJ |  | UMC-USA |  | Accounts receivable |  |  | 43,863 |  |  | —
HJ |  | UDS |  | Sales |  |  | 159,523 |  |  | Month-end 30 days
HJ |  | UDS |  | Accounts receivable |  |  | 2,696 |  |  | —
| Note A: | The significant intercompany transactions listed above include downstream and upstream transactions.
| Note B: | The sales price to the above related parties was determined through mutual agreement in reference to market conditions.
| Note C: | UMC authorized technology licenses to its subsidiary, USCXM, in the amount of US$0.35 billion, which was recognized as deferred revenue to be realized over time.
| b. | Significant transactions between the Company and other related parties were as follows:
| (i) | Name and Relationship of Related Parties
|  | Name of related parties |  | Relationship with the Company
|  | FARADAY TECHNOLOGY CORP. and its Subsidiaries |  | Associate
|  | UNIMICRON TECHNOLOGY CORP. |  | Associate
|  | SILICON INTEGRATED SYSTEMS CORP. |  | Associate (Note)
|  | PHOTRONICS DNP MASK CORPORATION |  | Other related party
|  | XIAMEN JINYUAN INDUSTRIAL DEVELOPMENT CO., LTD. |  | Directors and supervisors of subsidiaries
|  | FUJIAN ELECTRONICS & INFORMATION INDUSTRY ENTREPRENEURSHIP INVESTMENT LIMITED PARTNERSHIP |  | Directors of subsidiaries
Note: Prior to August 2023, SIS held one board seat on UMC’s Board of Directors. Therefore, SIS was classified as other related party. Beginning from August 2023, the Company determines that it has significant influence over SIS and accounts for its investment in SIS as an associate. Please refer to Note 6(7) for the relevant information.
| (ii) | Operating revenues
|  | For the years ended December 31, |
|  | 2021 |  |  | 2022 |  |  | 2023 |
|  | NT$ |  |  | NT$ |  |  | NT$ |
|  | (In Thousands) |  |  | (In Thousands) |  |  | (In Thousands) |
Associates |  | $ | 2,778,544 |  |  | $ | 5,744,098 |  |  | $ | 3,018,171 |
Other related party |  |  | 38,797 |  |  |  | 40,474 |  |  |  | 4,463 |
Total |  | $ | 2,817,341 |  |  | $ | 5,784,572 |  |  | $ | 3,022,634 |
| (iii) | Accounts receivable, net
|  | As of December 31, |
|  | 2022 |  |  | 2023 |
|  | NT$ |  |  | NT$ |
|  | (In Thousands) |  |  | (In Thousands) |
Associates |  |  |  |  |  |  |  |
FARADAY TECHNOLOGY CORP. and its Subsidiaries |  |  |  |  |  |  |  |
FARADAY TECHNOLOGY CORP. |  | $ | 441,963 |  |  | $ | 302,828 |
ARTERY TECHNOLOGY CORPORATION, LTD. |  |  | 56,864 |  |  |  | 40,886 |
Others |  |  | 30,698 |  |  |  | 3,602 |
Other associates |  |  | — |  |  |  | 648 |
Other related party |  |  | 1,052 |  |  |  | — |
Total |  | $ | 530,577 |  |  | $ | 347,964 |
The sales price to the above related parties was determined through mutual agreement in reference to market conditions. The collection periods for domestic sales to related parties were month-end 30 - 60 days, while the collection periods for overseas sales were month-end 30 - 60 days.
| (iv) | Refund liabilities (classified under other current liabilities)
|  | As of December 31, |
|  | 2022 |  |  | 2023 |
|  | NT$ |  |  | NT$ |
|  | (In Thousands) |  |  | (In Thousands) |
Associates |  | $ | 1,545 |  |  | $ | 636 |
Other related party |  |  | 7 |  |  |  | — |
Total |  | $ | 1,552 |  |  | $ | 636 |
| (v) | Significant asset transactions
Acquisition of financial assets at fair value through profit or loss, noncurrent For the year ended December 31, 2021:
|  | Trading Volume (In thousands of shares) |  |  | Transaction underlying |  | Purchase price |
|  |  |  |  |  |  | NT$ |
|  |  |  |  |  |  | (In Thousands) |
Associates |  |  | 82 |  |  | Stock of ARTERY TECHNOLOGY CORPORATION |  | $ | 13,929 |
For the years ended December 31, 2022 and 2023: None. Acquisition of subsidiaries’ ownership For the years ended December 31, 2021 and 2022: None. For the year ended December 31, 2023:
|  | Trading Capital Amount |  |  | Transaction underlying |  |  | Purchase price |
|  | RMB¥ |  |  |  |  |  | NT$ |
|  | (In Thousands) |  |  |  |  |  | (In Thousands) |
XIAMEN JINYUAN INDUSTRIAL DEVELOPMENT CO., LTD. |  |  | 3,741,862 |  |  |  | Ownership of USCXM |  |  | $ | 17,945,970 |
FUJIAN ELECTRONICS & INFORMATION INDUSTRY ENTREPRENEURSHIP INVESTMENT LIMITED PARTNERSHIP |  |  | 674,762 |  |  |  | Ownership of USCXM |  |  |  | 3,263,473 |
Total |  |  | 4,416,624 |  |  |  |  |  |  | $ | 21,209,443 |
Please refer to Note 9(6) for the relevant information. Acquisition of investments accounted for under the equity method For the years ended December 31, 2021 and 2022: None. For the year ended December 31, 2023:
|  | Trading Volume (In thousands of shares) |  |  | Transaction underlying |  | Purchase price |
|  |  |  |  |  |  | NT$ |
|  |  |  |  |  |  | (In Thousands) |
Associates |  |  | 4,945 |  |  | Stock of UNIMICRON |  | $ | 608,224 |
Please refer to Note 6(7) for the relevant information. Acquisition of intangible assets
|  |  |  | Purchase price |
|  |  |  | For the years ended December 31, |
|  |  |  | 2021 |  |  | 2022 |  |  | 2023 |
|  |  |  | NT$ |  |  | NT$ |  |  | NT$ |
|  |  |  | (In Thousands) |  |  | (In Thousands) |  |  | (In Thousands) |
FARADAY TECHNOLOGY CORP. |  | $ | 181,254 |  |  | $ | 266,053 |  |  | $ | 323,551 |
(vi) Others |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mask expenditure |  |  |  |  |  |  |  |  |  |  |  |
|  |  |  | For the years ended December 31, |
|  |  |  | 2021 |  |  | 2022 |  |  | 2023 |
|  |  |  | NT$ |  |  | NT$ |  |  | NT$ |
|  |  |  | (In Thousands) |  |  | (In Thousands) |  |  | (In Thousands) |
Other related party |  |  |  | $ | 1,861,438 |  |  | $ | 2,581,409 |  |  | $ | 2,375,225 |
Other payables of mask expenditure |  |  |  |
|  |  |  | As of December 31, |
|  |  |  | 2021 |  |  | 2022 |  |  | 2023 |
|  |  |  | NT$ |  |  | NT$ |  |  | NT$ |
|  |  |  | (In Thousands) |  |  | (In Thousands) |  |  | (In Thousands) |
Other related party |  |  |  | $ | 560,042 |  |  | $ | 812,185 |  |  | $ | 751,763 |
| c. | Key management personnel compensation
|  | For the years ended December 31, |
|  | 2021 |  |  | 2022 |  |  | 2023 |
|  | NT$ |  |  | NT$ |  |  | NT$ |
|  | (In Thousands) |  |  | (In Thousands) |  |  | (In Thousands) |
Short-term employee benefits |  | $ | 562,117 |  |  | $ | 2,047,118 |  |  | $ | 1,462,964 |
Post-employment benefits |  |  | 2,322 |  |  |  | 2,782 |  |  |  | 2,732 |
Share-based payment |  |  | 1,035,401 |  |  |  | 719,786 |  |  |  | 500,391 |
Others |  |  | 578 |  |  |  | 649 |  |  |  | 618 |
Total |  | $ | 1,600,418 |  |  | $ | 2,770,335 |  |  | $ | 1,966,705 |

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