ASX ASE Technology Holding Co Ltd

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, thereunto duly authorized.

1 ASE Technology Holding Co., Ltd. February 9, 2023 ASE Technology Holding Fourth Quarter 2022 Earnings Release

2 Safe Harbor Notice This presentation contains "forward - looking statements" within the meaning of Section 27A of the United States Securities Act of 1933, as amended, and Section 21E of the United States Securities Exchange Act of 1934, as amended. Although these forward - looking statements, which may include statements regarding our future results of operations, financial condition or business prospects, are based on our own information and information from other sources we believe to be reliable, you should not place undue reliance on these forward - looking statements, which apply only as of the date of this press release. The words “anticipate,” “believe,” “estimate,” “expect,” “intend,” “plan” and similar expressions, as they relate to us, are intended to identify these forward - looking statements in this presentation. These forward - looking statements are necessarily estimates reflecting the best judgment of our senior management and our actual results of operations, financial condition or business prospects may differ materially from those expressed or implied by the forward - looking statements for reasons including, among others, risks associated with cyclicality and market conditions in the semiconductor or electronic industry; changes in our regulatory environment, including our ability to comply with new or stricter environmental regulations and to resolve environmental liabilities; demand for the outsourced semiconductor packaging, testing and electronic manufacturing services we offer and for such outsourced services generally; the highly competitive semiconductor or manufacturing industry we are involved in; our ability to introduce new technologies in order to remain competitive; international business activities; our business strategy; our future expansion plans and capital expenditures; the strained relationship between the Republic of China and the People’s Republic of China; general economic and political conditions; the recent shift in United States trade policies; possible disruptions in commercial activities caused by natural or human - induced disasters; fluctuations in foreign currency exchange rates; and other factors. For a discussion of these risks and other factors, please see the documents we file from time to time with the Securities and Exchange Commission, including the 2021 Annual Report on Form 20 - F filed on March 29, 2022.

3 Consolidated Statements of Income Quarterly Comparison (unaudited) (NT$ million) Q4 / 2022 % Q3 / 2022 % Q4/ 2021 % QoQ YoY Q4 / 2021 % YoY Net Revenues: ATM 92,742 52.3% 97,137 51.5% 90,583 52.4% -5% 2% 83,805 50.4% 11% EMS 83,931 47.3% 90,660 48.1% 81,541 47.2% -7% 3% 81,541 49.1% 3% Others 744 0.4% 829 0.4% 812 0.4% -10% -8% 812 0.5% -8% Total Net Revenues 177,417 100.0% 188,626 100.0% 172,936 100.0% -6% 3% 166,158 100.0% 7% Gross Profit 34,099 19.2% 37,972 20.1% 32,894 19.0% -10% 4% 31,454 18.9% 8% Operating Income (Loss) 19,774 11.1% 23,683 12.6% 19,615 11.3% -17% 1% 18,776 11.3% 5% Pretax Income (Loss) 20,212 11.4% 23,615 12.5% 37,336 21.6% -14% -46% 18,873 11.4% 7% Income Tax Benefit (Expense) (3,596) -2.0% (5,046) -2.7% (5,592) -3.2% (3,586) -2.2% Non-controlling Interests (886) -0.5% (1,104) -0.6% (828) -0.5% (828) -0.5% Net Income Attributable to Shareholders of the Parent 15,730 8.9% 17,465 9.3% 30,916 17.9% -10% -49% 14,459 8.7% 9% Basic EPS(NT$) 3.77 4.03 7.20 -6% -48% 3.37 12% Diluted EPS(NT$) 3.57 3.92 6.99 -9% -49% 3.21 11% Additional Commentary From Management 1&2 : Gross Profit excl. PPA expenses 35,017 19.7% 38,888 22.0% 33,819 19.6% -10% 4% 32,379 19.5% 8% Operating Income excl. PPA expenses 20,954 11.8% 24,860 13.6% 20,802 12.0% -16% 1% 19,963 12.0% 5% Net income attributable to shareholders of the parent excl. PPA expenses 16,894 9.5% 18,628 10.7% 32,105 18.6% -9% -47% 15,648 9.4% 8% Basic EPS(NT$) excl. PPA expenses 4.05 4.30 7.48 -6% -46% 3.64 11% Pro Forma Basis* 1 : PPA expenses are the P&L impacts from the accounting treatment of purchase price allocation in relation to the ASE/SPIL trans act ion, which resulted in increased asset values from purchase price premiums in PP&E, intangibles and right - of - use assets. The PPA expenses excluded are related to depreciation, amortization and other expenses $1.13bn in 4Q22 and 3Q22, and $1.14bn in 4Q21 . 2 : PPA expenses are the P&L impacts from the accounting treatment of purchase price allocation in relation to the USI/ Asteelflash transaction, which resulted in increased asset and liability values from purchase price premiums in PP&E, intangibles, right - of - use assets and deferred tax lia bility. The PPA expenses excluded are related to depreciation, amortization, other expenses and income tax benefit $0.04bn in 4Q22 and 3Q22, and $0.07bn in 4Q2 1 . *: We are providing you with the unaudited pro forma financial information to assist you in your analysis of the financial aspects of our disposal of the China Sites in 4Q21. The unaudited pro forma financial information was based on our historical financial statements and the historical financial statements of our China sites, given effect to the disposal as if it had occurred for the preceding quarter of 4Q21.

4 Consolidated Statements of Income Yearly Comparison (unaudited) (NT$ million) FY / 2022 % FY / 2021 % YoY FY / 2021 % YoY Net Revenues: ATM 365,589 54.5% 327,718 57.5% 12% 302,300 55.5% 21% EMS 301,967 45.0% 239,488 42.0% 26% 239,488 44.0% 26% Others 3,317 0.5% 2,791 0.5% 19% 2,791 0.5% 19% Total Net Revenues 670,873 100.0% 569,997 100.0% 18% 544,579 100.0% 23% Gross Profit 134,930 20.1% 110,369 19.4% 22% 105,043 19.3% 28% Operating Income (Loss) 80,176 12.0% 62,125 10.9% 29% 59,038 10.8% 36% Pretax Income (Loss) 81,626 12.2% 80,336 14.1% 2% 59,368 10.9% 37% Income Tax Benefit (Expense) (16,399) -2.4% (14,322) -2.5% (12,027) -2.2% Non-controlling Interest (3,137) -0.5% (2,106) -0.4% (2,016) -0.4% Net Income Attributable to Shareholders of the Parent 62,090 9.3% 63,908 11.2% -3% 45,235 8.3% 37% Basic EPS 14.53 14.84 -2% 10.51 38% Diluted EPS 13.94 14.40 -3% 10.12 38% Additional Commentary From Management 1&2 : Gross Profit excl. PPA expenses 138,603 20.7% 114,184 20.0% 21% 108,858 20.0% 27% Operating Income excl. PPA expenses 84,894 12.7% 66,996 11.8% 27% 63,909 11.7% 33% Net income attributable to shareholders of the parent excl. PPA expenses 66,754 10.0% 68,734 12.1% -3% 50,061 9.2% 33% Basic EPS excl. PPA expenses 15.62 15.96 -2% 11.63 34% Pro Forma Basis* 1 : PPA expenses are the P&L impacts from the accounting treatment of purchase price allocation in relation to the ASE/SPIL trans act ion, which resulted in increased asset values from purchase price premiums in PP&E, intangibles and right - of - use assets. The PPA expenses excluded are related to depreciation, amortization and other expenses $4.53bn in 2022 and $4.61bn in 2021 . 2 : PPA expenses are the P&L impacts from the accounting treatment of purchase price allocation in relation to the USI/ Asteelflash transaction, which resulted in increased asset and liability values from purchase price premiums in PP&E, intangibles, right - of - use assets and deferred tax lia bility. The PPA expenses excluded are related to depreciation, amortization, other expenses and income tax benefit $0.17bn in 2022 and $0.30bn in 2021 . *: We are providing you with the unaudited pro forma financial information to assist you in your analysis of the financial as pec ts of our disposal of the China Sites in 4Q21. The unaudited pro forma financial information was based on our historical financial statements and the historical fi nan cial statements of our China sites, given effect to the disposal as if it had occurred for the preceding of 2021.

5 Consolidated Operations (unaudited) 65,557 70,919 82,019 83,805 82,355 93,355 97,137 92,742 47,684 49,147 61,116 81,541 61,163 66,213 90,660 83,931 602 619 758 812 873 871 829 744 18.3% 19.4% 20.3% 18.9% 19.7% 21.4% 20.1% 19.2% 9.1% 10.3% 12.1% 11.3% 11.2% 12.8% 12.6% 11.1% 0% 10% 20% 30% 40% 0 50,000 100,000 150,000 200,000 Q1/21* Q2/21* Q3/21* Q4/21* Q1/22 Q2/22 Q3/22 Q4/22 NT$ million ATM Revenue EMS Revenue Other Revenue Gross Margin Operating Margin *: We are providing you with the unaudited pro forma financial information to assist you in your analysis of the financial aspects of our disposal of the China sites in 4Q21. The unaudited pro forma financial information was based on our historical financi al statements and the historical financial statements of our China sites, given effect to the disposal as if it had occurred for the preceding quarters from 1Q21 to 4Q21.

6 ATM Statements of Income Quarterly Comparison (unaudited) (NT$ million) Q4 / 2022 % Q3 / 2022 % Q4 / 2021 % QoQ YoY Q4 / 2021 % YoY Net Revenues: Packaging 78,119 82.8% 82,090 83.1% 76,664 83.4% -5% 2% 70,942 83.3% 10% Testing 14,676 15.6% 14,941 15.1% 13,756 15.0% -2% 7% 12,700 14.9% 16% Direct Material 1,486 1.6% 1,765 1.8% 1,502 1.6% -16% -1% 1,502 1.8% -1% Others 41 0.0% 35 0.0% 36 0.0% 17% 14% 36 0.0% 14% Total Net Revenues 94,322 100.0% 98,831 100.0% 91,958 100.0% -5% 3% 85,180 100.0% 11% Gross Profit 26,193 27.8% 28,832 29.2% 25,741 28.0% -9% 2% 24,301 28.5% 8% Operating Income (Loss) 15,778 16.7% 18,663 18.9% 16,056 17.5% -15% -2% 15,216 17.9% 4% Additional Commentary From Management 1 : Gross Profit excl. PPA expenses 27,069 28.7% 29,709 30.1% 26,620 28.9% -9% 2% 25,180 29.6% 8% Operating Income excl. PPA expenses 16,904 17.9% 19,790 20.0% 17,185 18.7% -15% -2% 16,345 19.2% 3% Pro Forma Basis* 1 : PPA expenses are the P&L impacts from the accounting treatment of purchase price allocation in relation to the ASE/SPIL transaction, which resulted in increased asset values from purchase price premiums in PP&E, intangibles and right - of - use assets. The PPA expenses excluded are related to depreciation, amortization and other expenses $1.13bn in the quarters of 4Q22, 3Q22 and 4Q21 . *: We are providing you with the unaudited pro forma financial information to assist you in your analysis of the financial aspects of our disposal of the China sites in 4Q21. The unaudited pro forma financial information was based on our historical financial statements and the historical financial statements of our China sites, given effect to the disposal as if it had occurred for the preceding quarter of 4Q21.

7 ATM Statements of Income Yearly Comparison (unaudited) (NT$ million) FY / 2022 % FY / 2021 % YoY FY / 2021 % YoY Net Revenues: Packaging 310,024 83.3% 279,365 83.4% 11% 258,014 83.4% 20% Testing 55,960 15.0% 49,981 14.9% 12% 45,914 14.9% 22% Direct Material 6,018 1.6% 5,346 1.6% 13% 5,346 1.7% 13% Others 174 0.1% 113 0.1% 54% 113 0.0% 54% Total Net Revenues 372,176 100.0% 334,805 100.0% 11% 309,387 100.0% 20% Gross Profit 105,893 28.5% 88,672 26.5% 19% 83,346 26.9% 27% Operating Income (Loss) 66,447 17.9% 53,432 16.0% 24% 50,345 16.3% 32% Additional Commentary From Management 1 : Gross Profit excl. PPA expenses 109,400 29.4% 92,194 27.5% 19% 86,868 28.1% 26% Operating Profit excl. PPA expenses 70,954 19.1% 57,958 17.3% 22% 54,871 17.7% 29% Pro Forma Basis* 1 : PPA expenses are the P&L impacts from the accounting treatment of purchase price allocation in relation to the ASE/SPIL transaction, which resulted in increased asset values from purchase price premiums in PP&E, intangibles and right - of - use assets. The PPA expenses excluded are related to depreciation, amortization and other expenses $4.51bn in 2022 and $4.53bn in 2021 . *: We are providing you with the unaudited pro forma financial information to assist you in your analysis of the financial as pec ts of our disposal of the China sites in 4Q21. The unaudited pro forma financial information was based on our historical financi al statements and the historical financial statements of our China sites, given effect to the disposal as if it had occurred for th e preceding quarter of 4Q21.

8 ATM Operations (unaudited) 16,989 18,876 23,181 24,301 23,101 27,768 28,832 26,193 68,139 72,747 83,321 85,180 84,025 94,998 98,831 94,322 24.9% 25.9% 27.8% 28.5% 27.5% 29.2% 29.2% 27.8% 0% 10% 20% 30% 40% 50% 0 20,000 40,000 60,000 80,000 100,000 Q1/21* Q2/21* Q3/21* Q4/21* Q1/22 Q2/22 Q3/22 Q4/22 NT$ million Gross Profit Gross Margin Revenue *: We are providing you with the unaudited pro forma financial information to assist you in your analysis of the financial aspects of our disposal of the China sites in 4Q21. The unaudited pro forma financial information was based on our historical financi al statements and the historical financial statements of our China sites, given effect to the disposal as if it had occurred for the preceding quarters from 1Q21 to 4Q21.

9 ATM Revenue by Application (unaudited) 53% 52% 53% 53% 52% 52% 53% 53% 14% 15% 15% 16% 16% 16% 16% 16% 33% 33% 32% 31% 32% 32% 31% 31% 0% 20% 40% 60% 80% 100% Q1/21* Q2/21* Q3/21* Q4/21* Q1/22 Q2/22 Q3/22 Q4/22 Communication Computing Automotive, Consumer & Others *: We are providing you with the unaudited pro forma financial information to assist you in your analysis of the financial aspects of our disposal of the China sites in 4Q21. The unaudited pro forma financial information was based on our historical financi al statements and the historical financial statements of our China sites, given effect to the disposal as if it had occurred for the preceding quarters from 1Q21 to 4Q21.

10 37% 36% 39% 40% 43% 43% 42% 43% 38% 40% 37% 36% 34% 35% 34% 33% 8% 7% 7% 7% 6% 6% 7% 7% 15% 15% 15% 15% 15% 15% 15% 15% 2% 2% 2% 2% 2% 1% 2% 2% 0% 20% 40% 60% 80% 100% Q1/21* Q2/21* Q3/21* Q4/21* Q1/22 Q2/22 Q3/22 Q4/22 Material Testing Others Wirebonding Bump/FC/WLP /SiP ATM Revenue by Type (unaudited) *: We are providing you with the unaudited pro forma financial information to assist you in your analysis of the financial aspects of our disposal of the China sites in 4Q21. The unaudited pro forma financial information was based on our historical financi al statements and the historical financial statements of our China sites, given effect to the disposal as if it had occurred for the preceding quarters from 1Q21 to 4Q21.

11 EMS Operations Quarterly/Yearly Comparison (unaudited ) (NT$ million) Q4 / 2022 % Q3 / 2022 % Q4 / 2021 % QoQ YoY EMS Net Revenues 83,933 100.0% 90,665 100.0% 81,544 100.0% -7% 3% Gross Profit 7,803 9.3% 9,198 10.1% 7,108 8.7% -15% 10% Operating Income (Loss) 3,959 4.7% 5,130 5.7% 3,599 4.4% -23% 10% (NT$ million) FY / 2022 % FY / 2021 % YoY EMS Net Revenues 301,982 100.0% 239,519 100.0% 26% Gross Profit 29,031 9.6% 21,479 9.0% 35% Operating Income (Loss) 13,956 4.6% 8,706 3.6% 60%

12 EMS Operations Revenue by Application (unaudited ) 39% 39% 38% 38% 40% 35% 37% 38% 7% 10% 10% 8% 10% 13% 9% 9% 33% 28% 33% 38% 29% 28% 36% 34% 14% 16% 12% 11% 13% 15% 11% 12% 5% 5% 5% 4% 6% 8% 6% 6% 2% 2% 2% 1% 2% 1% 1% 1% 0% 20% 40% 60% 80% 100% Q1/21 Q2/21 Q3/21 Q4/21 Q1/22 Q2/22 Q3/22 Q4/22 Communication Computing Consumer Industrial Automotive Others

13 Key Balance Sheet Items & Indices (unaudited) (NT$ million) Dec. 31, 2022 Sept. 30, 2022 Cash and cash equivalent $58,040 $52,358 Financial assets - current 7,560 9,667 Financial assets - non current & investments - equity method 22,909 22,926 Property, plant & equipment 268,235 264,508 Total assets 707,068 737,829 Short-term loans 46,731 78,056 Current portion of bonds payable 4,999 4,999 Current portion of long-term loans 5,042 3,158 Bonds payable 42,851 40,534 Long-term loans & long-term bills payable 94,948 89,273 Total interest bearing debts 202,279 223,969 Total liabilities 387,143 432,179 Total equity (Including non-controlling interest) 319,925 305,650 Quarterly EBITDA 35,855 38,601 2022 Full Year EBITDA 140,328 Current ratio 1.35 1.22 Net debt to equity ratio 0.43 0.53

14 Equipment Capital Expenditure vs. EBITDA (unaudited) 432 567 425 437 443 515 400 339 830 916 1,108 1,174 1,100 1,203 1,283 1,141 0 200 400 600 800 1,000 1,200 1,400 Q1/21* Q2/21* Q3/21* Q4/21* Q1/22 Q2/22 Q3/22 Q4/22 US$ million Capex EBITDA *: We are providing you with the unaudited pro forma financial information to assist you in your analysis of the financial aspects of our disposal of the China sites in 4Q21. The unaudited pro forma financial information was based on our historical financial statements and the historical financial statements of our China sites, given effect to the disposal as if it had occurred for the preceding quarters from 1Q21 to 4Q21.

15 2022 Recap • 2022 revenue and margin improvement achieved targets • 2022 ASE ATM revenue grew 13% year over year (all in USD terms, on pro forma basis), more than 2x of the logic semiconductor industry growth • 2022 ASE ATM GM/OPM was 28.5%/17.9% (29.4%/19.1% excluding PPA (purchase price allocation)), surpassing historical peak levels of 27.0%/16.6% • 2022 ASE consolidated revenue grew 16% year over year • 2022 ASE consolidated operating margin improved 1.1 percentage points year over year with net profit growth of 29% year over year (in USD terms, on pro forma basis) • 2022 Advanced Packaging revenue grew 27% year over year, Test revenue grew 15% year over year, momentum continues in mid to long term • 2022 Consolidated automotive revenue grew 50% year over year, around $1.6B; 2022 ATM automotive grew 50% year over year, reaching close to $1B milestone Note: All numbers indicated are in USD terms. 2022 year over year comparison numbers are stated on a pro forma basis, which excludes the 4 disposed China sites from year 2021

16 2023 Outlook (1/2) • Industry outperformer with enhanced structural profitability • Expect ASE ATM 1Q2023 revenue to be sub - seasonal due to industry destocking; however, ATM business should trough in the first quarter followed by sequential quarter to quarter growth for the remaining of the year • With multiple market uncertainties, 2023 ATM revenue year over year will range from flattish to high single digit decline • Expect higher mix of Advanced Packaging and Test business • Expect continuing market share growth due to increased semiconductor complexity, IDM outsourcing and ASE’s smart manufacturing offering • Reiterate ASE ATM annual structural gross margin of mid 20%s to 30 % Note: All numbers indicated are in USD terms.

17 2023 Outlook (2/2) • Late to fall, Early to rise • Scale, technology leadership, flexibility and proven record make ASE an indispensable manufacturing partner, resulting in more resilient pricing and expanding lead against competition during volatile market timing. • ASE’s global footprint gives strong competitive advantages in current geopolitical environment: ATM high - end supply chain in Taiwan plus diversified capacities in China, Korea, Malaysia, Singapore, Japan; EMS supply chain in China plus diversified capacities in Taiwan, Vietnam, Mexico, and Europe. Future expansion will be planned based on customer and end market requirements. • Capacity expansion continues in 2H2023 although at a slower rate comparing to 2022, however, more expansion in building, infrastructure, and smart manufacturing preparing for next cycle. • Further improvement of cash flow based on disciplined capital investment, scale efficiency, and sustained profitability.

18 First Quarter 2023 Outlook* Based on our current business outlook and exchange rate assumptions, management projects overall performance for the first quarter of 2023 to be as follows : • In NT dollar terms, our ATM 1st quarter 2023 business levels should be similar with proforma 2nd quarter 2021 levels; • Our ATM 1st quarter 2023 gross margin should be above 2nd quarter 2019 gross margin; • In NT dollar terms, our EMS 1st quarter 2023 business levels should decline high single digit year over year; • Our EMS 1st quarter 2023 operating margin should be similar with 1st quarter 2021. *: Due to the impact of the COVID - 19 outbreak, our outlook continues to be subject to a higher degree of risk. The information provided is done so as a reference of our current view as of the date of this presentation. Our business, financial condition an d results of operations are of greater adverse risk; and, as a result, there may be a higher likelihood of material variances b etw een our expected and actual results .

19 www.aseglobal.com Thank You

20 Appendix 1 Consolidated Statements of Comprehensive Income Pro Forma Historical Data* (unaudited) (NT$ million) Q1/2021 % Q2/2021 % Q3/2021 % Q4/2021 % FY/2021 % Net Revenues: ATM 65,557 57.6% 70,919 58.8% 82,019 57.0% 83,805 50.4% 302,300 55.5% EMS 47,684 41.9% 49,147 40.7% 61,116 42.5% 81,541 49.1% 239,488 44.0% Others 602 0.5% 619 0.5% 758 0.5% 812 0.5% 2,791 0.5% Total Net Revenues 113,843 100.0% 120,685 100.0% 143,893 100.0% 166,158 100.0% 544,579 100.0% Gross Profit 20,868 18.3% 23,470 19.4% 29,251 20.3% 31,454 18.9% 105,043 19.3% Operating Income (Loss) 10,405 9.1% 12,394 10.3% 17,463 12.1% 18,776 11.3% 59,038 10.8% Pretax Income (Loss) 10,625 9.3% 12,440 10.3% 17,429 12.1% 18,873 11.4% 59,368 10.9% Income Tax Benefit (Expense) (2,392) -2.1% (2,543) -2.1% (3,505) -2.4% (3,586) -2.2% (12,027) -2.2% Non-controlling Interests (252) -0.2% (358) -0.3% (668) -0.5% (828) -0.5% (2,106) -0.4% Net Income Attributable to Shareholders of the Parent 7,981 7.0% 9,539 7.9% 13,256 9.2% 14,459 8.7% 45,235 8.3% Basic EPS(NT$) 1.85 2.21 3.07 3.37 10.51 Diluted EPS(NT$) 1.80 2.12 2.99 3.21 10.12 FX (NTD/USD) 28.30 28.03 27.79 27.78 27.98 *: We are providing you with the unaudited pro forma financial information to assist you in your analysis of the financial aspects of our disposal of the China sites in 4Q21. The unaudited pro forma financial information was based on our historical financial statements and the historical financial statements of our China sites, given effect to the disposal as if it had occurred for the preceding quarters from 1Q21 to 4Q21 and full year 2021 .

21 Appendix 2 ATM Statements of Comprehensive Income Pro Forma Historical Data* (unaudited) (NT$ million) Q1/2021 % Q2/2021 % Q3/2021 % Q4/2021 % FY/2021 % Net Revenues: Packaging 56,844 83.4% 60,716 83.5% 69,512 83.5% 70,942 83.3% 258,014 83.4% Testing 10,204 15.0% 10,656 14.6% 12,354 14.8% 12,700 14.9% 45,914 14.9% Direct Material 1,044 1.5% 1,372 1.9% 1,429 1.7% 1,502 1.8% 5,347 1.7% Others 47 0.1% 3 0.0% 26 0.0% 36 0.0% 112 0.0% Total Net Revenues 68,139 100.0% 72,747 100.0% 83,321 100.0% 85,180 100.0% 309,387 100.0% Gross Profit 16,989 24.9% 18,876 25.9% 23,181 27.8% 24,301 28.5% 83,346 26.9% Operating Income (Loss) 9,415 13.8% 11,048 15.2% 14,667 17.6% 15,216 17.9% 50,345 16.3% FX (NTD/USD) 28.30 28.03 27.79 27.78 27.98 *: We are providing you with the unaudited pro forma financial information to assist you in your analysis of the financial aspects of our disposal of the China sites in 4Q21. The unaudited pro forma financial information was based on our historical financial statements and the historical financial statements of our China sites, given effect to the disposal as if it had occurred for the preceding quarters from 1Q21 to 4Q21 and full year 2021.

22 Appendix 3 Consolidated Statements of Comprehensive Income ( unaudited) (NT$ thousand) Q1/2022 Q2/2022 Q3/2022 Q4/2022 FY/2022 Revenues 144,390,827 160,439,019 188,625,557 177,417,239 670,872,642 COGS 115,919,599 126,051,460 150,653,584 143,317,989 535,942,632 PPA under COGS 920,316 918,661 916,426 917,737 3,673,140 Gross profit 28,471,228 34,387,559 37,971,973 34,099,250 134,930,010 Gross profit excl. PPA 29,391,544 35,306,220 38,888,399 35,016,987 138,603,150 OPEX 12,358,395 13,782,006 14,289,270 14,324,758 54,754,429 PPA under OPEX 261,477 261,428 261,109 261,723 1,045,737 Operating income 16,112,833 20,605,553 23,682,703 19,774,492 80,175,581 Operating income excl. PPA 17,294,626 21,785,642 24,860,238 20,953,952 84,894,458 Non Op gain/(loss) 549,787 529,795 (67,443) 437,990 1,450,129 PPA under Non Op gain/ (loss) 3,637 20,922 7,038 6,268 37,865 Non Op gain/ (loss) excl. PPA 553,424 550,717 (60,405) 444,258 1,487,994 Pretax income 16,662,621 21,135,348 23,615,261 20,212,482 81,625,712 PPA under Pretax income 1,185,430 1,201,011 1,184,573 1,185,728 4,756,742 Pretax income excl. PPA 17,848,051 22,336,359 24,799,834 21,398,210 86,382,454 Tax expenses 3,277,505 4,478,602 5,046,341 3,596,127 16,398,575 PPA under Tax expense (13,081) (16,957) (12,653) (13,164) (55,855) Tax expense excl. PPA 3,290,586 4,495,559 5,058,994 3,609,291 16,454,430 Non-controlling interests 477,834 668,595 1,104,295 885,919 3,136,643 PPA under Non-controlling interests 9,074 10,913 8,619 9,015 37,621 Non-controlling interests excl. PPA 486,908 679,508 1,112,914 894,934 3,174,264 Net income attributable to shareholders of the parent 12,907,282 15,988,151 17,464,625 15,730,436 62,090,494 PPA expenses under Net income attributable to shareholders of the 1,163,275 1,173,141 1,163,301 1,163,549 4,663,266 Net income attributable to shareholders of the parent excl. PPA 14,070,557 17,161,292 18,627,926 16,893,985 66,753,760 Total PPA expenses 1,172,349 1,184,054 1,171,920 1,172,564 4,700,887 Basic EPS (NT$) 3.01 3.69 4.03 3.77 14.53 Basic EPS (NT$) excl. PPA 3.28 3.97 4.30 4.05 15.62 Diluted EPS (NT$) 2.92 3.61 3.92 3.57 13.94 Diluted EPS (NT$) excl. PPA 3.19 3.88 4.18 3.84 15.02