6-K 1 dp255760_6k.htm FORM 6-K

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

October 2026

Commission File Number 001-16125

ASE Technology Holding Co., Ltd.

(Translation of registrant’s name into English)

26, Chin 3rd Road

Kaohsiung, Taiwan

Republic of China

(Address of principal executive offices)

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

Form 20-F ☒ Form 40-F ☐

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.

ASE TECHNOLOGY HOLDING CO., LTD.
Date: October 29, 2026 By: /s/ Joseph Tung
Name: Joseph Tung
Title: Chief Financial Officer

Investor Relations Contact

[email protected]

Tel: +886.2.6636.5678

https://www.aseglobal.com

ASE Technology Holding Co., Ltd. Reports Its Unaudited Consolidated Financial
Results for the Third Quarter of 2026

Taipei, October 29, 2026 – ASE Technology Holding Co., Ltd. (TWSE: 3711, NYSE: ASX) (“We”, “ASEH”, or the “Company”), the leading provider of semiconductor assembly and testing services (“ATM”) and the provider of electronic manufacturing services (“EMS”), today reported its unaudited1 net revenues of NT$244,161 million for 3Q26, up by 44.8% year-over-year and up by 27.8% sequentially. Net income attributable to shareholders of the parent for the quarter totaled NT$26,996 million, up from NT$10,870 million in 3Q25 and up from NT$21,065 million in 2Q26. Basic earnings per share for the quarter were NT$6.13 (or US$0.384 per ADS), compared to NT$2.50 for 3Q25 and NT$4.80 for 2Q26. Diluted earnings per share for the quarter were NT$5.84 (or US$0.365 per ADS), compared to NT$2.41 for 3Q25 and NT$4.61 for 2Q26.

RESULTS OF OPERATIONS

3Q26 Results Highlights – Consolidated

lNet revenues from packaging operations, testing operations, EMS operations, and others represented approximately 50%, 11%, 38%, and 1% of the total net revenues for the quarter, respectively.
lCost of revenues was NT$190,194 million for the quarter, up from NT$150,917 million in 2Q26.
-Raw material cost totaled NT$116,793 million for the quarter, representing 48% of the total net revenues.
-Labor cost totaled NT$23,777 million for the quarter, representing 10% of the total net revenues.
-Depreciation, amortization and rental expenses totaled NT$20,664 million for the quarter.
lGross margin increased by 1.1 percentage points to 22.1% in 3Q26 from 21.0% in 2Q26.
lOperating margin was 13.6% in 3Q26, compared to 11.1% in 2Q26.
lNon-operating items:
-Net interest expense was NT$2,611 million.
-Net gain on foreign exchange hedging activities was NT$1,176 million.

1 All financial information presented in this press release is unaudited, consolidated and prepared in accordance with Taiwan-IFRS (International Financial Reporting Standards as endorsed for use in the R.O.C.). Such financial information is generated internally by us and has not been subjected to the same review and scrutiny, including internal auditing procedures and audit by our independent auditors, to which we subject our year-end audited consolidated financial statements, and may vary materially from the year-end audited consolidated financial information for the same period. Any evaluation of the financial information presented in this press release should also take into account our published year-end audited consolidated financial statements and the notes to those statements. In addition, the financial information presented is not necessarily indicative of our results of operations for any future period.

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-Net gain on equity-method investments was NT$190 million.
-Other net non-operating income was NT$813 million, primarily attributable to miscellaneous income.

Total non-operating expenses for the quarter were NT$432 million.

lIncome before tax was NT$32,710 million in 3Q26, compared to NT$25,696 million in 2Q26. We recorded income tax expense of NT$4,831 million for the quarter, compared to NT$4,171 million in 2Q26.
lNet income attributable to shareholders of the parent was NT$26,996 million in 3Q26, compared to NT$10,870 million in 3Q25 and NT$21,065 million in 2Q26.
lOur total number of shares outstanding at the end of the quarter was 4,488,092,493, including treasury stock owned by our subsidiaries in 3Q26. Our 3Q26 basic earnings per share of NT$6.13 (or US$0.384 per ADS) were based on 4,403,114,522 weighted average number of shares outstanding in 3Q26. Our 3Q26 diluted earnings per share of NT$5.84 (or US$0.365 per ADS) were based on 4,532,143,664 weighted average number of shares outstanding in 3Q26.

3Q26 Results Highlights – ATM

lNet revenues were NT$151,485 million for the quarter, up by 51.0% year-over-year and up by 20.1% sequentially.
lCost of revenues was NT$105,073 million for the quarter, up by 35.4% year-over-year and up by 14.6% sequentially.
-Raw material cost totaled NT$40,974 million for the quarter, representing 27% of the total net revenues.
-Labor cost totaled NT$20,013 million for the quarter, representing 13% of the total net revenues.
-Depreciation, amortization and rental expenses totaled NT$19,131 million for the quarter.
lGross margin increased by 3.3 percentage points to 30.6% in 3Q26 from 27.3% in 2Q26.
lOperating margin was 20.0% in 3Q26, compared to 15.7% in 2Q26.

3Q26 Results Highlights – EMS

lNet revenues were NT$93,469 million, up by 35.4% year-over-year and up by 42.1% sequentially.
lCost of revenues for the quarter was NT$85,676 million, up by 36.8% year-over-year and up by 43.0% sequentially.
-Raw material cost totaled NT$76,221 million for the quarter, representing 82% of the total net revenues.
-Labor cost totaled NT$3,698 million for the quarter, representing 4% of the total net revenues.
-Depreciation, amortization and rental expenses totaled NT$1,289 million for the quarter.
lGross margin decreased by 0.6 percentage points to 8.3% in 3Q26 from 8.9% in 2Q26.
lOperating margin was 3.3% in 3Q26, compared to 2.4% in 2Q26.
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LIQUIdiTY AND CAPITAL RESOURCES

lEquipment capital expenditures in 3Q26 totaled US$2,104 million, of which US$991 million was used in packaging operations, US$1,067 million in testing operations, US$41 million in EMS operations and US$5 million in interconnect materials operations and others.
lTotal unused credit lines amounted to NT$457,283 million as of September 30, 2026.
lCurrent ratio was 1.16 and net debt to equity ratio was 0.66 as of September 30, 2026.
lTotal number of employees was 119,346 as of September 30, 2026, compared to 114,558 as of June 30, 2026.

Business Review

Customers

ATM Basis

lOur five largest customers together accounted for approximately 46% of our total net revenues in 3Q26, compared to 44% in 2Q26. One customer accounted for more than 10% of our total net revenues in 3Q26.
lOur top 10 customers contributed 63% of our total net revenues in 3Q26, compared to 60% in 2Q26.
lOur customers that are integrated device manufacturers or IDMs accounted for 46% of our total net revenues in 3Q26, compared to 41% in 2Q26.

EMS Basis

lOur five largest customers together accounted for approximately 70% of our total net revenues in 3Q26, compared to 58% in 2Q26. Two customers each accounted for more than 10% of our total net revenues in 3Q26 individually.
lOur top 10 customers contributed 78% of our total net revenues in 3Q26, compared to 69% in 2Q26.

About ASE Technology Holding Co., Ltd.

ASEH is the leading provider of semiconductor manufacturing services in assembly and test. The Company develops and offers complete turnkey solutions covering front-end engineering test, wafer probing and final test, as well as packaging, materials and electronic manufacturing services through USI with superior technologies, breakthrough innovations, and advanced development programs. With advanced technological capabilities and a global presence spanning Taiwan, China, South Korea, Japan, Singapore, Malaysia, the Philippines, Vietnam, Mexico, and Tunisia as well as the United States and Europe, ASEH has established a reputation for reliable, high quality products and services.

For more information, please visit our website at https://www.aseglobal.com.

Safe Harbor Notice

This press release 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. These statements are made under the “safe harbor” provisions of the U.S. Private Securities Litigation Reform Act of 1995. 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 press release. 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

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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 2025 Annual Report on Form 20-F filed on April 1, 2026.

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Supplemental Financial Information

(Unaudited)

Consolidated Operations

3Q26 2Q26 3Q25
EBITDA2 (NT$ million) 57,963 45,779 32,613

ATM Operations

3Q26 2Q26 3Q25
Net Revenues (NT$ million) 151,485 126,148 100,289
Revenues by Application
Communication 38% 41% 45%
Computing 34% 30% 25%
Automotive, Consumer & Others 28% 29% 30%
Revenues by Type
Bumping, Flip Chip, WLP & SiP 51% 49% 48%
Wirebonding 24% 24% 26%
Others 6% 6% 6%
Testing 17% 19% 18%
Material 2% 2% 2%
Capacity & EBITDA
Equipment CapEx (US$ million) 2,063 1,646 736
EBITDA2 (NT$ million) 52,440 41,491 27,969
Number of Wirebonders 24,801 24,815 25,120
Number of Testers 8,831 8,348 7,066

EMS Operations

3Q26 2Q26 3Q25
Net Revenues (NT$ million) 93,469 65,789 69,022
Revenues by Application
Communication 19% 22% 30%
Computing 21% 16% 9%
Consumer 41% 36% 40%
Industrial 12% 16% 12%
Automotive 6% 8% 7%
Others 1% 2% 2%
Capacity
Equipment CapEx (US$ million) 41 49 40

2 EBITDA stands for net income or loss before interest, taxes, depreciation, amortization, impairment and investment gain or loss as well as other items.

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ASE Technology Holding Co., Ltd.

Summary of Consolidated Statement of Income Data

(In NT$ million, except per share data)

(Unaudited)

For the three months ended For the nine months ended

Sep. 30

2026

Jun. 30

2026

(Retrospectively Adjusted)

Sep. 30

2025

Sep. 30

2026

(Retrospectively Adjusted)

Sep. 30

2025

Net revenues
Packaging 122,173 99,387 79,806 310,541 221,877
Testing 26,302 23,665 18,420 71,008 51,037
EMS 92,997 65,411 68,405 219,769 188,638
Others 2,689 2,601 1,938 7,569 5,920
Total net revenues 244,161 191,064 168,569 608,887 467,472
Cost of revenues (190,194) (150,917) (139,692) (479,955) (388,015)
Gross profit 53,967 40,147 28,877 128,932 79,457
Operating expenses
Research and development (11,273) (10,229) (8,308) (30,712) (23,891)
Selling, general and administrative (9,552) (8,788) (7,368) (26,455) (22,501)
Total operating expenses (20,825) (19,017) (15,676) (57,167) (46,392)
Operating income 33,142 21,130 13,201 71,765 33,065
Net non-operating income and expenses
Interest expense - net (2,611) (1,853) (1,428) (6,040) (3,887)
Foreign exchange gain (loss) - net (636) 738 (3,790) (2,123) 6,420
Gain (Loss) on valuation of financial assets and liabilities - net 1,812 2,899 5,191 7,775 (4,035)
Gain on equity-method investments - net 190 2,298 294 3,216 557
Others - net 813 484 508 1,975 921
Total non-operating income and expenses (432) 4,566 775 4,803 (24)
Income before tax 32,710 25,696 13,976 76,568 33,041
Income tax expense (4,831) (4,171) (2,615) (12,632) (6,213)
Income from operations and before non-controlling interests 27,879 21,525 11,361 63,936 26,828
Non-controlling interests (883) (460) (491) (1,743) (883)
Net income attributable to shareholders of the parent

26,996

21,065

10,870

62,193

25,945

Per share data:
Earnings per share
– Basic NT$6.13 NT$4.80 NT$2.50 NT$14.17 NT$5.99
– Diluted NT$5.84 NT$4.61 NT$2.41 NT$13.40 NT$5.73
Earnings per equivalent ADS
– Basic US$0.384 US$0.304 US$0.168 US$0.895 US$0.383
– Diluted US$0.365 US$0.292 US$0.162 US$0.846 US$0.367
Number of weighted average shares used in diluted EPS calculation (in thousand shares) 4,532,144 4,505,703 4,419,121 4,510,216 4,414,605
FX (NTD/USD) 31.96 31.59 29.74 31.69 31.24
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ASE Technology Holding Co., Ltd.

Summary of ATM Statement of Income Data

(In NT$ million)

(Unaudited)

For the three months ended For the nine months ended

Sep. 30

2026

Jun. 30

2026

(Retrospectively Adjusted)

Sep. 30

2025

Sep. 30

2026

(Retrospectively Adjusted)

Sep. 30

2025

Net revenues
Packaging 122,945 100,324 80,602 312,942 224,402
Testing 26,302 23,665 18,420 71,008 51,037
Direct material 2,148 2,057 1,190 5,826 3,839
Others 90 102 77 291 244
Total net revenues 151,485 126,148 100,289 390,067 279,522
Cost of revenues (105,073) (91,661) (77,592) (279,970) (216,966)
Gross profit 46,412 34,487 22,697 110,097 62,556
Operating expenses
Research and development (9,375) (8,384) (6,695) (25,256) (19,058)
Selling, general and administrative (6,794) (6,325) (5,140) (18,943) (15,484)
Total operating expenses (16,169) (14,709) (11,835) (44,199) (34,542)
Operating income 30,243 19,778 10,862 65,898 28,014
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ASE Technology Holding Co., Ltd.

Summary of EMS Statement of Income Data

(In NT$ million)

(Unaudited)

For the three months ended For the nine months ended

Sep. 30

2026

Jun. 30

2026

Sep. 30

2025

Sep. 30

2026

Sep. 30

2025

Net revenues 93,469 65,789 69,022 221,132 190,088
Cost of revenues (85,676) (59,916) (62,643) (201,604) (172,632)
Gross profit 7,793 5,873 6,379 19,528 17,456
Operating expenses
Research and development (1,969) (1,887) (1,671) (5,606) (4,974)
Selling, general and administrative (2,713) (2,417) (2,167) (7,375) (6,820)
Total operating expenses (4,682) (4,304) (3,838) (12,981) (11,794)
Operating income 3,111 1,569 2,541 6,547 5,662
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ASE Technology Holding Co., Ltd.

Summary of Consolidated Balance Sheet Data

(In NT$ million)

(Unaudited)

As of Sep. 30, 2026

As of Jun. 30, 2026

(Retrospectively Adjusted)

Current assets
Cash and cash equivalents 88,421 91,292
Financial assets – current 19,517 16,081
Trade receivables 174,495 143,318
Inventories 99,721 86,268
Others 37,313 23,565
Total current assets 419,467 360,524
Financial assets - non-current & investments - equity -method 70,189 67,852
Property, plant and equipment 621,962 517,715
Right-of-use assets 16,480 14,427
Intangible assets 65,731 65,937
Others 50,956 44,988
Total assets 1,244,785 1,071,443
Current liabilities
Short-term borrowings3 70,428 60,063
Long-term debts - current portion 5,141 11,787
Trade payables 126,991 99,513
Others 160,317 165,445
Total current liabilities 362,877 336,808
Bonds payable 42,201 14,985
Long-term borrowings3 276,633 209,603
Other liabilities 109,152 90,852
Total liabilities 790,863 652,248
Equity attributable to shareholders of the parent 422,834 389,203
Non-controlling interests 31,088 29,992
Total liabilities & shareholders’ equity 1,244,785 1,071,443
Current ratio 1.16 1.07
Net debt to equity ratio 0.66 0.47

3 Borrowings include bank loans and bills payable.

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ASE Technology Holding Co., Ltd.

Summary of Consolidated Statement of Cash Flow Data

(In NT$ million)

(Unaudited)

For the three months ended For the nine months ended
Sep. 30
2026
Jun. 30
2026
(Retrospectively Adjusted)
Sep. 30
2025
Sep. 30
2026
(Retrospectively Adjusted)
Sep. 30
2025
Cash Flows from Operating Activities
Income before tax 32,710 25,696 13,976 76,568 33,041
Depreciation & amortization 22,258 20,003 16,992 60,929 49,614
Other operating activities items (4,506) 1,315 (16,342) (3,634) (11,211)
Net cash generated from operating activities 50,462 47,014 14,626 133,863 71,444
Cash Flows from Investing Activities

Net payments for property, plant

and equipment

(125,852) (79,849) (44,920) (249,792) (124,373)
Other investment activities items (1,490) (3,240) (996) (6,383) (2,677)
Net cash used in investing activities (127,342) (83,089) (45,916) (256,175) (127,050)
Cash Flows from Financing Activities
Net proceeds from borrowings and bonds 100,925 39,864 49,518 140,862 87,825
Dividends paid (28,958) - (23,034) (28,958) (23,034)
Other financing activities items 1,067 (709) 1,234 1,122 835
Net cash generated from financing activities 73,034 39,155 27,718 113,026 65,626
Foreign currency exchange effect 975 401 5,929 5,238 (11,371)
Net increase (decrease) in cash and cash equivalents (2,871) 3,481 2,357 (4,048) (1,351)
Cash and cash equivalents at the beginning of period 91,292 87,811 72,785 92,469 76,493
Cash and cash equivalents at the end of period 88,421 91,292 75,142 88,421 75,142
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