Where can I read ASX's latest 10-K?

ASX's latest annual report, a 20-F, was filed on Apr 1, 2026 for the fiscal year ended Dec 31, 2025. It is linked above and opens on EDGAR, the SEC's own site, where every exhibit is also listed.

When did ASX last file an 8-K?

On Sep 9, 2026: a current report. An 8-K reports a material event between quarterly reports; the one that furnishes the quarter's results is filed under Item 2.02.

Are ASX insiders buying or selling?

Over the last 13 months insiders sold $367.5M in 34 sales and bought nothing on the open market; 25 other transactions (awards, exercises, tax withholding, gifts and plan purchases). The most recent sale: Uang Du-Tsuen (Chief Administration Officer) sold 3,000 shares on Jul 22, 2026 for $2.0M. Every figure is as the insider filed it on Form 4; a sale under a 10b5-1 plan was scheduled in advance.

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ASE Technology Holding Co. Ltd. American Depositary Shares (each representing Two Common Shares)Stock · Technology

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ASX SEC filings (2026)

CIK 1122411 · Semiconductors & Related Devices (SIC 3674) · incorporated in F5 · fiscal year ends in December

941 filings on EDGAR since 2000 · 28 annual, 0 quarterly, 642 current · financial statements · earnings

Latest 20-F

Apr 1, 2026

fiscal year to Dec 31, 2025

Latest 8-K

Sep 9, 2026

current report

Filings on file

941

since 2000, 67 insider forms

What happened, last 12 months#

Every earnings release with its print, every report with its quarter, the other 8-Ks by what they covered, the proxy statements, and each day an insider bought or sold — newest first, each line opening the filing on EDGAR. The index by form and year follows.

Insider transactions#

What officers, directors and 10% holders reported on Forms 4 and 5 over the last 13 months, from the documents themselves: one insider’s trades of one kind on one day are one row, with the shares, the price range and the total as filed. Open-market buys and sells first; awards, exercises, tax withholding, gifts and employee-plan purchases are grouped below them.

Over the last 13 months insiders sold $367.5M in 34 sales and bought nothing on the open market; 25 other transactions (awards, exercises, tax withholding, gifts and plan purchases).

Date	Insider	Action	Shares	Price	Value	Held after	Filing
Jul 22, 2026Form 4	Uang Du-TsuenChief Administration OfficerSold · $2.0M · 3,000 sh	Sold	3,000	$665.00	$2.0M	751,000	Form 4
Jul 15, 2026Form 4	Uang Du-TsuenChief Administration OfficerSold · $2.1M · 3,000 sh	Sold	3,000	$688.00	$2.1M	754,000	Form 4
Jul 6, 2026Form 4	Uang Du-TsuenChief Administration OfficerSold · $1.4M · 2,000 sh	Sold	2,000	$687.00	$1.4M	757,000	Form 4
Jul 1, 2026Form 4	Uang Du-TsuenChief Administration OfficerSold · $2.1M · 3,000 sh	Sold	3,000	$709.00	$2.1M	759,000	Form 4
Jun 30, 2026Form 4	Uang Du-TsuenChief Administration OfficerSold · $3.4M · 5,000 sh	Sold	5,000	$664.00–$687.00	$3.4M	762,000	Form 4
Jun 23, 2026Form 4	Uang Du-TsuenChief Administration OfficerSold · $2.1M · 3,000 sh	Sold	3,000	$697.00	$2.1M	767,000	Form 4
Jun 22, 2026Form 4	Uang Du-TsuenChief Administration OfficerSold · $3.3M · 5,000 sh	Sold	5,000	$667.00	$3.3M	770,000	Form 4
Jun 18, 2026Form 4	Uang Du-TsuenChief Administration OfficerSold · $1.8M · 3,000 sh	Sold	3,000	$611.00	$1.8M	775,000	Form 4
Jun 3, 2026Form 4	Uang Du-TsuenChief Administration OfficerSold · $3.1M · 5,000 sh	Sold	5,000	$617.00	$3.1M	778,000	Form 4
Jun 1, 2026Form 4	Uang Du-TsuenChief Administration OfficerSold · $3.0M · 5,000 sh	Sold	5,000	$607.00	$3.0M	783,000	Form 4
May 27, 2026Form 4	Chen JeffreyDirectorSold · $1.3M · 2,000 sh	Sold	2,000	$653.00	$1.3M	0	Form 4
May 26, 2026Form 4	Chen JeffreyDirectorSold · $5.7M · 9,000 sh	Sold	9,000	$630.00	$5.7M	2,000	Form 4
May 25, 2026Form 4	Chen JeffreyDirectorSold · $5.3M · 9,000 sh	Sold	9,000	$590.00	$5.3M	11,000	Form 4
May 22, 2026Form 4	Chen JeffreyDirectorSold · $4.8M · 9,000 sh	Sold	9,000	$538.00	$4.8M	20,000	Form 4
May 21, 2026Form 4	Chen JeffreyDirectorSold · $4.5M · 9,000 sh	Sold	9,000	$505.00	$4.5M	29,000	Form 4
May 20, 2026Form 4	Chen JeffreyDirectorSold · $4.3M · 9,000 sh	Sold	9,000	$477.00	$4.3M	38,000	Form 4
May 19, 2026Form 4	Chen JeffreyDirectorSold · $4.3M · 9,000 sh	Sold	9,000	$483.00	$4.3M	47,000	Form 4
May 18, 2026Form 4	Chen JeffreyDirectorSold · $4.6M · 9,000 sh	Sold	9,000	$506.00	$4.6M	56,000	Form 4
May 15, 2026Form 4	Chen JeffreyDirectorSold · $5.1M · 9,000 sh	Sold	9,000	$563.00	$5.1M	65,000	Form 4
May 14, 2026Form 4	Chen JeffreyDirectorSold · $5.0M · 9,000 sh	Sold	9,000	$560.00	$5.0M	74,000	Form 4
Apr 24, 2026Form 4	Chen JeffreyDirectorSold · $4.3M · 9,000 sh	Sold	9,000	$473.00	$4.3M	83,000	Form 4
Apr 23, 2026Form 4	Chen JeffreyDirectorSold · $4.4M · 9,000 sh	Sold	9,000	$487.67	$4.4M	92,000	Form 4
Apr 22, 2026Form 4	Chen JeffreyDirectorSold · $4.2M · 9,000 sh	Sold	9,000	$466.50	$4.2M	101,000	Form 4
Apr 21, 2026Form 4	Chen JeffreyDirectorSold · $4.2M · 9,000 sh	Sold	9,000	$463.50	$4.2M	110,000	Form 4
Apr 20, 2026Form 4	Chen Tien-SzuGM, ASE Inc. Chung-Li BranchSold · $247.1M · 530,000 sh	Sold	530,000	$465.11–$471.00	$247.1M	2,251,821	Form 4
Apr 20, 2026Form 4	Chen JeffreyDirectorSold · $4.2M · 9,000 sh	Sold	9,000	$461.50	$4.2M	119,000	Form 4
Apr 17, 2026Form 4	Chen JeffreyDirectorSold · $4.1M · 9,000 sh	Sold	9,000	$454.00	$4.1M	128,000	Form 4
Apr 16, 2026Form 4	Chen JeffreyDirectorSold · $4.0M · 9,000 sh	Sold	9,000	$446.00	$4.0M	137,000	Form 4
Apr 15, 2026Form 4	Chen JeffreyDirectorSold · $3.9M · 9,000 sh	Sold	9,000	$432.00	$3.9M	146,000	Form 4
Apr 14, 2026Form 4	Chen JeffreyDirectorSold · $3.8M · 9,000 sh	Sold	9,000	$427.00	$3.8M	155,000	Form 4
Apr 13, 2026Form 4	Chen JeffreyDirectorSold · $3.7M · 9,000 sh	Sold	9,000	$408.33	$3.7M	164,000	Form 4
Apr 10, 2026Form 4	Chen JeffreyDirectorSold · $3.5M · 9,000 sh	Sold	9,000	$387.00	$3.5M	173,000	Form 4
Apr 9, 2026Form 4	Chen JeffreyDirectorSold · $3.5M · 9,000 sh	Sold	9,000	$388.00	$3.5M	182,000	Form 4
Apr 8, 2026Form 4	Chen JeffreyDirectorSold · $3.4M · 9,000 sh	Sold	9,000	$380.50	$3.4M	191,000	Form 4

Awards, exercises, withholding and plan purchases · 25 transactions

Date	Insider	Action	Shares	Price	Value	Held after	Filing
Sep 22, 2026Form 4	Chang Hung PenDirectorExercise or conversion · $29.6M · 300,000 sh	Exercise or conversion	300,000	$98.60	$29.6M	4,800,000	Form 4
Sep 22, 2026Form 4	Chang Hung PenDirectorExercise or conversion · Stock Option (Right to Buy) · $0 · 300,000 sh	Exercise or conversion· Stock Option (Right to Buy)	300,000	$0.00	$0	1,200,000	Form 4
Sep 7, 2026Form 4	Chen JeffreyDirectorGift · $0 · 1,200,000 sh	Gift	1,200,000	$0.00	$0	2,683,000	Form 4
Sep 7, 2026Form 4	Wu Tien-YueDirectorAward · $0 · 600,000 sh	Award	600,000	$0.00	$0	8,277,473	Form 4
Sep 7, 2026Form 4	Tung Hung-SzuChief Financial OfficerAward · $0 · 400,000 sh	Award	400,000	$0.00	$0	4,202,954	Form 4
Sep 7, 2026Form 4	Lo RaymondGM TW & Kaohsiung Pkg FacilityAward · $0 · 400,000 sh	Award	400,000	$0.00	$0	4,383,430	Form 4
Sep 7, 2026Form 4	Tsai Chi-WenChairman & President, SPILAward · $0 · 334,000 sh	Award	334,000	$0.00	$0	15,598,000	Form 4
Sep 7, 2026Form 4	Chen JeffreyDirectorAward · $0 · 300,000 sh	Award	300,000	$0.00	$0	2,683,000	Form 4
Sep 7, 2026Form 4	Chen Tien-SzuGM, ASE Inc. Chung-Li BranchAward · $0 · 300,000 sh	Award	300,000	$0.00	$0	2,551,821	Form 4
Sep 7, 2026Form 4	Uang Du-TsuenChief Administration OfficerAward · $0 · 90,000 sh	Award	90,000	$0.00	$0	841,000	Form 4
Sep 7, 2026Form 4	Tang Andrew RDirectorAward · $0 · 85,000 sh	Award	85,000	$0.00	$0	310,000	Form 4
Sep 7, 2026Form 4	Kuo Hung-MingPrincipal Accounting OfficerAward · $0 · 50,000 sh	Award	50,000	$0.00	$0	985,500	Form 4
Sep 7, 2026Form 4	Hsiang KennethCEO, ISE LabsAward · $0 · 40,000 sh	Award	40,000	$0.00	$0	109,000	Form 4
Sep 7, 2026Form 4	Lin ChungGM, ASE Shanghai & ElectronicsAward · $0 · 30,000 sh	Award	30,000	$0.00	$0	170,278	Form 4
Sep 7, 2026Form 4	Chung Chih-HsiaoGM, ASE Japan & Wuxi TongzhiAward · $0 · 30,000 sh	Award	30,000	$0.00	$0	425,000	Form 4
Aug 13, 2026Form 4	Chung Chih-HsiaoGM, ASE Japan & Wuxi TongzhiExercise or conversion · $3.0M · 73,000 sh	Exercise or conversion	73,000	$41.10	$3.0M	395,000	Form 4
Aug 13, 2026Form 4	Chung Chih-HsiaoGM, ASE Japan & Wuxi TongzhiExercise or conversion · Stock Option (Right to Buy) · $0 · 73,000 sh	Exercise or conversion· Stock Option (Right to Buy)	73,000	$0.00	$0	0	Form 4
Aug 12, 2026Form 4	Chung Chih-HsiaoGM, ASE Japan & Wuxi TongzhiExercise or conversion · $12.0M · 292,000 sh	Exercise or conversion	292,000	$41.10	$12.0M	322,000	Form 4
Aug 12, 2026Form 4	Chung Chih-HsiaoGM, ASE Japan & Wuxi TongzhiExercise or conversion · Stock Option (Right to Buy) · $0 · 292,000 sh	Exercise or conversion· Stock Option (Right to Buy)	292,000	$0.00	$0	73,000	Form 4
Jul 29, 2026Form 4	Lin ChungGM, ASE Shanghai & ElectronicsExercise or conversion · $2.0M · 35,000 sh	Exercise or conversion	35,000	$41.10–$98.60	$2.0M	140,278	Form 4
Jul 29, 2026Form 4	Lin ChungGM, ASE Shanghai & ElectronicsExercise or conversion · Stock Option (Right to Buy) · $0 · 35,000 sh	Exercise or conversion· Stock Option (Right to Buy)	35,000	$0.00	$0	490,000	Form 4
Jul 13, 2026Form 4	Chang Hung PenDirectorExercise or conversion · $271.2M · 4,500,000 sh	Exercise or conversion	4,500,000	$41.10–$98.60	$271.2M	4,500,000	Form 4
Jul 13, 2026Form 4	Chang Hung PenDirectorExercise or conversion · Stock Option (Right to Buy) · $0 · 4,500,000 sh	Exercise or conversion· Stock Option (Right to Buy)	4,500,000	$0.00	$0	1,500,000	Form 4
Apr 9, 2026Form 4	Chang Chien ShenDirectorExercise or conversion · $272.9M · 4,500,000 sh	Exercise or conversion	4,500,000	$41.10–$99.70	$272.9M	6,247,647	Form 4
Apr 9, 2026Form 4	Chang Chien ShenDirectorExercise or conversion · Stock Option (Right to Buy) · $0 · 4,500,000 sh	Exercise or conversion· Stock Option (Right to Buy)	4,500,000	$0.00	$0	1,500,000	Form 4

Reports and proxy statements#

Annual reports (10-K, 20-F, 40-F), quarterly reports (10-Q), current reports (8-K, 6-K) and proxy statements, newest first. An 8-K is described by its items. A form opens the document on EDGAR, or the filing’s index where it furnishes exhibits (an earnings release is the 8-K’s Exhibit 99.1).

2026 · 21 filings

Filed	Form	What it is	Period
Sep 9, 20266-K	6-K	Report of a foreign private issuer	Sep 9, 2026
Aug 10, 20266-K	6-K	Report of a foreign private issuer	Aug 10, 2026
Aug 3, 20266-K	6-K	Report of a foreign private issuer	Aug 3, 2026
Aug 3, 20266-K	6-K	Report of a foreign private issuer	Aug 3, 2026
Jul 30, 20266-K	6-K	Report of a foreign private issuer	Jul 30, 2026
Jul 30, 20266-K	6-K	Report of a foreign private issuer	Jul 30, 2026
Jul 9, 20266-K	6-K	Report of a foreign private issuer	Jul 9, 2026
Jun 9, 20266-K	6-K	Report of a foreign private issuer	Jun 9, 2026
May 8, 20266-K/A	6-K/A	Report of a foreign private issuer, amended	May 8, 2026
May 8, 20266-K	6-K	Report of a foreign private issuer	May 8, 2026
Apr 29, 20266-K	6-K	Report of a foreign private issuer	Apr 29, 2026
Apr 29, 20266-K	6-K	Report of a foreign private issuer	Apr 29, 2026
Apr 10, 20266-K	6-K	Report of a foreign private issuer	Apr 10, 2026
Apr 8, 20266-K	6-K	Report of a foreign private issuer	Apr 8, 2026
Apr 1, 202620-F	20-F	Annual report (foreign private issuer), FY2025 — revenue $20.57B (+13% y/y), net income $1.31B, EPS $1.40	Dec 31, 2025
Mar 27, 20266-K	6-K	Report of a foreign private issuer	Mar 27, 2026
Mar 10, 20266-K	6-K	Report of a foreign private issuer	Mar 10, 2026
Feb 10, 20266-K	6-K	Report of a foreign private issuer	Feb 10, 2026
Feb 5, 20266-K	6-K	Report of a foreign private issuer	Feb 5, 2026
Feb 5, 20266-K	6-K	Report of a foreign private issuer	Feb 5, 2026
Jan 9, 20266-K	6-K	Report of a foreign private issuer	Jan 9, 2026

2025 · 25 filings

Filed	Form	What it is	Period
Dec 9, 20256-K	6-K	Report of a foreign private issuer	Dec 9, 2025
Nov 10, 20256-K	6-K	Report of a foreign private issuer	Nov 10, 2025
Oct 30, 20256-K	6-K	Report of a foreign private issuer	Oct 30, 2025
Oct 30, 20256-K	6-K	Report of a foreign private issuer	Oct 30, 2025
Oct 9, 20256-K	6-K	Report of a foreign private issuer	Oct 9, 2025
Sep 10, 20256-K	6-K	Report of a foreign private issuer	Sep 9, 2025
Aug 11, 20256-K	6-K	Report of a foreign private issuer	Aug 11, 2025
Jul 31, 20256-K	6-K	Report of a foreign private issuer	Jul 31, 2025
Jul 31, 20256-K	6-K	Report of a foreign private issuer	Jul 31, 2025
Jul 10, 20256-K	6-K	Report of a foreign private issuer	Jul 10, 2025
Jun 10, 20256-K	6-K	Report of a foreign private issuer	Jun 10, 2025
May 9, 20256-K	6-K	Report of a foreign private issuer	May 9, 2025
Apr 30, 20256-K	6-K	Report of a foreign private issuer	Apr 30, 2025
Apr 30, 20256-K	6-K	Report of a foreign private issuer	Apr 30, 2025
Apr 21, 20256-K	6-K	Report of a foreign private issuer	Apr 10, 2025
Apr 7, 20256-K/A	6-K/A	Report of a foreign private issuer, amended	Apr 7, 2025
Apr 1, 20256-K	6-K	Report of a foreign private issuer	Apr 1, 2025
Mar 31, 20256-K	6-K	Report of a foreign private issuer	Mar 31, 2025
Mar 27, 202520-F	20-F	Annual report (foreign private issuer), FY2024 — revenue $18.16B (−4% y/y), net income $1.03B, EPS $1.10	Dec 31, 2024
Mar 10, 20256-K	6-K	Report of a foreign private issuer	Mar 10, 2025
Feb 13, 20256-K	6-K	Report of a foreign private issuer	Feb 13, 2025
Feb 13, 20256-K	6-K	Report of a foreign private issuer	Feb 13, 2025
Feb 10, 20256-K	6-K	Report of a foreign private issuer	Feb 10, 2025
Feb 7, 20256-K	6-K	Report of a foreign private issuer	Feb 7, 2025
Jan 10, 20256-K	6-K	Report of a foreign private issuer	Jan 10, 2025

2024 · 24 filings

Filed	Form	What it is	Period
Dec 10, 20246-K	6-K	Report of a foreign private issuer	Dec 10, 2024
Nov 12, 20246-K	6-K	Report of a foreign private issuer	Nov 11, 2024
Oct 31, 20246-K	6-K	Report of a foreign private issuer	Oct 31, 2024
Oct 31, 20246-K	6-K	Report of a foreign private issuer	Oct 31, 2024
Oct 9, 20246-K	6-K	Report of a foreign private issuer	Oct 9, 2024
Sep 10, 20246-K	6-K	Report of a foreign private issuer	Sep 10, 2024
Aug 9, 20246-K	6-K	Report of a foreign private issuer	Aug 9, 2024
Jul 25, 20246-K	6-K	Report of a foreign private issuer	Jul 25, 2024
Jul 25, 20246-K	6-K	Report of a foreign private issuer	Jul 25, 2024
Jul 9, 20246-K	6-K	Report of a foreign private issuer	Jul 8, 2024
Jun 11, 20246-K	6-K	Report of a foreign private issuer	Jun 11, 2024
May 9, 20246-K	6-K	Report of a foreign private issuer	May 9, 2024
Apr 25, 20246-K	6-K	Report of a foreign private issuer	Apr 25, 2024
Apr 25, 20246-K	6-K	Report of a foreign private issuer	Apr 25, 2024
Apr 9, 20246-K	6-K	Report of a foreign private issuer	Apr 9, 2024
Apr 8, 20246-K	6-K	Report of a foreign private issuer	Apr 8, 2024
Apr 3, 202420-F	20-F	Annual report (foreign private issuer), FY2023 — revenue $19.00B (−13% y/y), net income $1.22B, EPS $1.30	Dec 31, 2023
Mar 28, 20246-K	6-K	Report of a foreign private issuer	Mar 27, 2024
Mar 11, 20246-K	6-K	Report of a foreign private issuer	Mar 11, 2024
Feb 22, 20246-K	6-K	Report of a foreign private issuer	Feb 22, 2024
Feb 15, 20246-K	6-K	Report of a foreign private issuer	Feb 15, 2024
Feb 1, 20246-K	6-K	Report of a foreign private issuer	Feb 1, 2024
Feb 1, 20246-K	6-K	Report of a foreign private issuer	Feb 1, 2024
Jan 9, 20246-K	6-K	Report of a foreign private issuer	Jan 9, 2024

2023 · 28 filings — 27 × 6-K, 1 × 20-F

Filed	Form	What it is	Period
Apr 10, 202320-F	20-F	Annual report (foreign private issuer), FY2022 — revenue $21.83B (+6% y/y), net income $2.10B, EPS $2.25	Dec 31, 2022

27 current reports (8-K) not listed; the year is on EDGAR.

2022 · 23 filings — 22 × 6-K, 1 × 20-F

Filed	Form	What it is	Period
Mar 29, 202220-F	20-F	Annual report (foreign private issuer), FY2021 — revenue $20.55B (+21% y/y), net income $2.24B, EPS $2.45	Dec 31, 2021

22 current reports (8-K) not listed; the year is on EDGAR.

2021 · 28 filings — 27 × 6-K, 1 × 20-F

Filed	Form	What it is	Period
Apr 6, 202120-F	20-F	Annual report (foreign private issuer), FY2020 — revenue $16.99B (+23% y/y), net income $1.02B, EPS $1.10	Dec 31, 2020

27 current reports (8-K) not listed; the year is on EDGAR.

2020 · 28 filings — 26 × 6-K, 1 × 20-F, 1 × 20-F/A

Filed	Form	What it is	Period
May 15, 202020-F/A	20-F/A	Annual report (foreign private issuer), amended	Dec 31, 2019
Mar 31, 202020-F	20-F	Annual report (foreign private issuer), FY2019 — revenue $13.81B (+14% y/y), net income $610.8M, EPS $0.65	Dec 31, 2019

26 current reports (8-K) not listed; the year is on EDGAR.

2019 · 25 filings — 24 × 6-K, 1 × 20-F

Filed	Form	What it is	Period
Apr 26, 201920-F	20-F	Annual report (foreign private issuer), FY2018 — revenue $12.12B (+24% y/y), net income $895.9M, EPS $1.00	Dec 31, 2018

24 current reports (8-K) not listed; the year is on EDGAR.

2018 · 39 filings — 38 × 6-K, 1 × 20-F

Filed	Form	What it is	Period
Mar 28, 201820-F	20-F	Annual report (foreign private issuer), FY2017 — revenue $9.80B (+15% y/y), net income $826.5M, EPS $0.45	Dec 31, 2017

38 current reports (8-K) not listed; the year is on EDGAR.

2017 · 32 filings — 31 × 6-K, 1 × 20-F

Filed	Form	What it is	Period
Apr 21, 201720-F	20-F	Annual report (foreign private issuer)	Dec 31, 2016

31 current reports (8-K) not listed; the year is on EDGAR.

2016 · 36 filings — 35 × 6-K, 1 × 20-F

Counted, not listed; the year is on EDGAR.

2015 · 37 filings — 36 × 6-K, 1 × 20-F

Counted, not listed; the year is on EDGAR.

2014 · 29 filings — 28 × 6-K, 1 × 20-F

Counted, not listed; the year is on EDGAR.

2013 · 29 filings — 28 × 6-K, 1 × 20-F

Counted, not listed; the year is on EDGAR.

2012 · 23 filings — 22 × 6-K, 1 × 20-F

Counted, not listed; the year is on EDGAR.

2011 · 23 filings — 21 × 6-K, 1 × 20-F, 1 × 6-K/A

Counted, not listed; the year is on EDGAR.

2010 · 24 filings — 23 × 6-K, 1 × 20-F

Counted, not listed; the year is on EDGAR.

2009 · 25 filings — 24 × 6-K, 1 × 20-F

Counted, not listed; the year is on EDGAR.

2008 · 25 filings — 24 × 6-K, 1 × 20-F

Counted, not listed; the year is on EDGAR.

2007 · 25 filings — 23 × 6-K, 1 × 20-F, 1 × 20-F/A

Counted, not listed; the year is on EDGAR.

2006 · 25 filings — 24 × 6-K, 1 × 20-F

Counted, not listed; the year is on EDGAR.

2005 · 21 filings — 20 × 6-K, 1 × 20-F

Counted, not listed; the year is on EDGAR.

2004 · 20 filings — 19 × 6-K, 1 × 20-F

Counted, not listed; the year is on EDGAR.

2003 · 19 filings — 18 × 6-K, 1 × 20-F

Counted, not listed; the year is on EDGAR.

2002 · 20 filings — 19 × 6-K, 1 × 20-F

Counted, not listed; the year is on EDGAR.

2001 · 14 filings — 13 × 6-K, 1 × 20-F

Counted, not listed; the year is on EDGAR.

2000 · 2 filings — 2 × 6-K

Counted, not listed; the year is on EDGAR.

Insider, ownership and other filings#

Insider ownership (Forms 3, 4, 5 and 144), beneficial ownership (Schedules 13D and 13G), registration and prospectus (S-1, S-3, S-8, 424B and related) and the rest, counted by year, with the newest 25 of each of the latest 3 years shown. A Form 4 is one insider’s transaction report; a 13G is a passive holder above five percent.

2026 · 68 filings — 33 × 3, 32 × 4, 1 × 3/A and 2 other forms

Filed	Form	What it is	Period
Sep 24, 20264	4	Insider transaction (Form 4)	Sep 22, 2026
Sep 9, 20264	4	Insider transaction (Form 4)	Sep 7, 2026
Sep 9, 20264	4	Insider transaction (Form 4)	Sep 7, 2026
Sep 9, 20264	4	Insider transaction (Form 4)	Sep 7, 2026
Sep 9, 20264	4	Insider transaction (Form 4)	Sep 7, 2026
Sep 9, 20264	4	Insider transaction (Form 4)	Sep 7, 2026
Sep 9, 20264	4	Insider transaction (Form 4)	Sep 7, 2026
Sep 9, 20264	4	Insider transaction (Form 4)	Sep 7, 2026
Sep 9, 20264	4	Insider transaction (Form 4)	Sep 7, 2026
Sep 9, 20264	4	Insider transaction (Form 4)	Sep 7, 2026
Sep 9, 20264	4	Insider transaction (Form 4)	Sep 7, 2026
Sep 9, 20264	4	Insider transaction (Form 4)	Sep 7, 2026
Sep 9, 20264	4	Insider transaction (Form 4)	Sep 7, 2026
Aug 19, 20264	4	Insider transaction (Form 4)	Aug 12, 2026
Aug 10, 20263	3	Initial insider holdings (Form 3)	Aug 10, 2026
Jul 31, 20264	4	Insider transaction (Form 4)	Jul 29, 2026
Jul 24, 20264	4	Insider transaction (Form 4)	Jul 22, 2026
Jul 17, 20264	4	Insider transaction (Form 4)	Jul 15, 2026
Jul 15, 20264	4	Insider transaction (Form 4)	Jul 13, 2026
Jul 8, 20264	4	Insider transaction (Form 4)	Jul 6, 2026
Jul 2, 20264	4	Insider transaction (Form 4)	Jun 30, 2026
Jun 23, 20264	4	Insider transaction (Form 4)	Jun 18, 2026
Jun 3, 20264	4	Insider transaction (Form 4)	Jun 1, 2026
May 29, 2026SD	SD	Specialized disclosure (conflict minerals)	—
May 27, 20263/A	3/A	Initial insider holdings (Form 3), amended	Mar 18, 2026

The newest 25 of 68 shown; the full year is on EDGAR.

2025 · 2 filings — 1 × SCHEDULE 13D/A, 1 × SD

Filed	Form	What it is	Period
May 29, 2025SD	SD	Specialized disclosure (conflict minerals)	—
Mar 12, 2025SCHEDULE 13D/A	SCHEDULE 13D/A	Other filings	—

2024 · 4 filings — 1 × 3, 1 × S-8, 1 × SC 13D and 1 other form

Filed	Form	What it is	Period
Aug 15, 2024S-8	S-8	Employee stock plan registration	—
May 31, 2024SD	SD	Specialized disclosure (conflict minerals)	—
May 8, 2024SC 13D	SC 13D	Active holder above 5% (Schedule 13D)	—
May 8, 20243	3	Initial insider holdings (Form 3)	May 3, 2024

2023 · 2 filings — 1 × S-8, 1 × SD

Counted, not listed; the year is on EDGAR.

2022 · 2 filings — 1 × S-8, 1 × SD

Counted, not listed; the year is on EDGAR.

2021 · 1 filing — 1 × SD

Counted, not listed; the year is on EDGAR.

2020 · 1 filing — 1 × SD

Counted, not listed; the year is on EDGAR.

2019 · 2 filings — 1 × S-8, 1 × SD

Counted, not listed; the year is on EDGAR.

2018 · 23 filings — 9 × 425, 2 × CORRESP, 2 × F-4/A and 8 other forms

Counted, not listed; the year is on EDGAR.

2017 · 21 filings — 6 × 425, 4 × F-4/A, 3 × SC 13D/A and 5 other forms

Counted, not listed; the year is on EDGAR.

2016 · 34 filings — 11 × SC TO-T/A, 9 × SC 13D/A, 4 × 425 and 8 other forms

Counted, not listed; the year is on EDGAR.

2015 · 37 filings — 12 × SC TO-T/A, 11 × SC 13D/A, 3 × CORRESP and 7 other forms

Counted, not listed; the year is on EDGAR.

2014 · 1 filing — 1 × SD

Counted, not listed; the year is on EDGAR.

2013 · 1 filing — 1 × SC 13G/A

Counted, not listed; the year is on EDGAR.

2012 · 1 filing — 1 × SC 13G

Counted, not listed; the year is on EDGAR.

2011 · 3 filings — 1 × F-6EF, 1 × S-8, 1 × SC 13G/A

Counted, not listed; the year is on EDGAR.

2010 · 1 filing — 1 × SC 13G/A

Counted, not listed; the year is on EDGAR.

2009 · 5 filings — 2 × UPLOAD, 1 × CORRESP, 1 × S-8 and 1 other form

Counted, not listed; the year is on EDGAR.

2008 · 5 filings — 3 × SC 13E3/A, 2 × SC 13G/A

Counted, not listed; the year is on EDGAR.

2007 · 7 filings — 2 × SC 13G/A, 2 × SC 14D9, 1 × CORRESP and 2 other forms

Counted, not listed; the year is on EDGAR.

2006 · 13 filings — 5 × SC 13G/A, 3 × SC 14D9, 2 × F-6 POS and 3 other forms

Counted, not listed; the year is on EDGAR.

2005 · 7 filings — 3 × SC 13G/A, 2 × UPLOAD, 1 × CORRESP and 1 other form

Counted, not listed; the year is on EDGAR.

2004 · 6 filings — 3 × SC 13G/A, 1 × RW, 1 × S-8 and 1 other form

Counted, not listed; the year is on EDGAR.

2003 · 9 filings — 3 × F-3/A, 2 × SC 13G/A, 1 × 424B1 and 3 other forms

Counted, not listed; the year is on EDGAR.

2002 · 3 filings — 2 × SC 13G/A, 1 × F-3

Counted, not listed; the year is on EDGAR.

2001 · 3 filings — 2 × SC 13G, 1 × SC 13D

Counted, not listed; the year is on EDGAR.

2000 · 9 filings — 2 × 424B4, 2 × F-1/A, 2 × F-4/A and 3 other forms

Counted, not listed; the year is on EDGAR.

About this data

ASE Technology Holding Co. Ltd. American Depositary Shares (each representing Two Common Shares) (ASX) has 941 filings on EDGAR going back to 2000: 28 annual reports, 0 quarterly reports and 642 current reports, plus proxy statements, insider forms and ownership schedules. Its latest annual report, a 20-F, was filed on Apr 1, 2026 for the fiscal year ended Dec 31, 2025. The most recent 8-K, on Sep 9, 2026, covered a material event. Over the last 13 months insiders sold $367.5M in 34 sales and bought nothing on the open market; 25 other transactions (awards, exercises, tax withholding, gifts and plan purchases). Not investment advice.

Every row is a filing EDGAR lists for the registrants that have been ASE Technology Holding Co. Ltd. American Depositary Shares (each representing Two Common Shares), read from the SEC’s submissions index each morning; a filing accepted after that read appears the next day. Where a company changed its filing entity (a holding-company reorganisation, Google into Alphabet) the predecessor’s filings are shown for the years it filed as the company, derived from the filings themselves. Dates are the filing date; the period is the report’s own. The latest 3 years of reports are listed in full, the next years to 10 without their 8-Ks, and older years are counted; the other forms are counted too, with the newest 25 of each of the latest 3 years shown. Insider transactions are the Form 4 and Form 5 documents themselves, filed since January 2026, every number as the insider filed it: a day’s lots are summed, a blank price adds its shares and no dollars, and a purchase through an employee stock plan is a plan purchase, not insider buying. The documents stay on sec.gov, public domain, and every link opens the SEC’s copy. ChartRow does not summarise or interpret filings.

FAQ#

Where can I read ASX's latest 10-K?: ASX's latest annual report, a 20-F, was filed on Apr 1, 2026 for the fiscal year ended Dec 31, 2025. It is linked above and opens on EDGAR, the SEC's own site, where every exhibit is also listed.
When did ASX last file an 8-K?: On Sep 9, 2026: a current report. An 8-K reports a material event between quarterly reports; the one that furnishes the quarter's results is filed under Item 2.02.
Are ASX insiders buying or selling?: Over the last 13 months insiders sold $367.5M in 34 sales and bought nothing on the open market; 25 other transactions (awards, exercises, tax withholding, gifts and plan purchases). The most recent sale: Uang Du-Tsuen (Chief Administration Officer) sold 3,000 shares on Jul 22, 2026 for $2.0M. Every figure is as the insider filed it on Form 4; a sale under a 10b5-1 plan was scheduled in advance.
How many SEC filings has ASX made?: 941 filings are on EDGAR under the registrant records that have been ASE Technology Holding Co. Ltd. American Depositary Shares (each representing Two Common Shares), going back to 2000; 67 of them are insider ownership forms (Forms 3, 4, 5 and 144).

ASX SEC filings (2026)

What happened, last 12 months#

September 2026

August 2026

July 2026

June 2026

May 2026

April 2026

March 2026

February 2026

January 2026

December 2025

November 2025

October 2025

Insider transactions#

Reports and proxy statements#

Insider, ownership and other filings#

About this data

FAQ#