UMC SEC filings (2026)
CIK 1033767 · Semiconductors & Related Devices (SIC 3674) · incorporated in F5 · fiscal year ends in December
732 filings on EDGAR since 1997 · 26 annual, 0 quarterly, 581 current · financial statements · earnings
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.
September 2026
- Sep 298-K8-K · Report of a foreign private issuer
- Sep 22Insider saleLIN JEN-TSUNG (Vice President) sold 10,000 shares for $1.6M at $163.00
- Sep 17Insider saleLiu Chitung (CFO & SVP) sold 400,000 shares for $58.0M at $145.00
- Sep 16Insider saleLiu Chitung (CFO & SVP) sold 1,200,000 shares for $170.8M at $142.33
- Sep 48-K8-K · Report of a foreign private issuer
- Sep 28-K8-K · Report of a foreign private issuer
August 2026
- Aug 268-K8-K · Report of a foreign private issuer
- Aug 148-K8-K · Report of a foreign private issuer
- Aug 68-K8-K · Report of a foreign private issuer
- Aug 58-K8-K · Report of a foreign private issuer
July 2026
- Jul 308-K8-K · Report of a foreign private issuer
- Jul 298-K8-K · Report of a foreign private issuer
- Jul 298-K8-K · Report of a foreign private issuer
- Jul 218-K8-K · Report of a foreign private issuer
- Jul 158-K8-K · Report of a foreign private issuer
- Jul 148-K8-K · Report of a foreign private issuer
- Jul 13Insider saleLiu Chitung (CFO & SVP) sold 1,900,000 shares for $294.3M at $154.89
- Jul 68-K8-K · Report of a foreign private issuer
June 2026
- Jun 30Insider saleHU CHE-JEN (Vice President) sold 10,000 shares for $1.7M at $171.30
- Jun 298-K8-K · Report of a foreign private issuer
- Jun 238-K8-K · Report of a foreign private issuer
- Jun 228-K8-K · Report of a foreign private issuer
- Jun 188-K8-K · Report of a foreign private issuer
- Jun 168-K8-K · Report of a foreign private issuer
- Jun 58-K8-K · Report of a foreign private issuer
- Jun 38-K8-K · Report of a foreign private issuer
May 2026
- May 278-K8-K · Report of a foreign private issuer
- May 228-K8-K · Report of a foreign private issuer
- May 208-K8-K · Report of a foreign private issuer
- May 158-K8-K · Report of a foreign private issuer
- May 138-K8-K · Report of a foreign private issuer
- May 128-K8-K · Report of a foreign private issuer
- May 118-K8-K · Report of a foreign private issuer
- May 88-K8-K · Report of a foreign private issuer
- May 78-K8-K · Report of a foreign private issuer
April 2026
- Apr 30ReportAnnual report (foreign private issuer), FY2025 — revenue $7.57B (+7% y/y), net income $1.28B, EPS $0.50
- Apr 308-K8-K · Report of a foreign private issuer
- Apr 298-K8-K · Report of a foreign private issuer
- Apr 298-K8-K · Report of a foreign private issuer
- Apr 218-K8-K · Report of a foreign private issuer
- Apr 158-K8-K · Report of a foreign private issuer
- Apr 88-K8-K · Report of a foreign private issuer
March 2026
- Mar 268-K8-K · Report of a foreign private issuer
- Mar 128-K8-K · Report of a foreign private issuer
- Mar 58-K8-K · Report of a foreign private issuer
February 2026
- Feb 258-K8-K · Report of a foreign private issuer
- Feb 258-K8-K · Report of a foreign private issuer
- Feb 248-K8-K · Report of a foreign private issuer
- Feb 138-K8-K · Report of a foreign private issuer
- Feb 58-K8-K · Report of a foreign private issuer
January 2026
- Jan 288-K8-K · Report of a foreign private issuer
- Jan 148-K8-K · Report of a foreign private issuer
- Jan 78-K8-K · Report of a foreign private issuer
December 2025
- Dec 308-K8-K · Report of a foreign private issuer
- Dec 178-K8-K · Report of a foreign private issuer
- Dec 108-K8-K · Report of a foreign private issuer
- Dec 48-K8-K · Report of a foreign private issuer
November 2025
- Nov 288-K8-K · Report of a foreign private issuer
- Nov 208-K8-K · Report of a foreign private issuer
- Nov 128-K8-K · Report of a foreign private issuer
- Nov 68-K8-K · Report of a foreign private issuer
October 2025
- Oct 298-K8-K · Report of a foreign private issuer
- Oct 298-K8-K · Report of a foreign private issuer
- Oct 288-K8-K · Report of a foreign private issuer
- Oct 278-K8-K · Report of a foreign private issuer
- Oct 218-K8-K · Report of a foreign private issuer
- Oct 158-K8-K · Report of a foreign private issuer
- Oct 78-K8-K · Report of a foreign private issuer
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 $526.4M in 5 sales and bought nothing on the open market; 1 other transaction (awards, exercises, tax withholding, gifts and plan purchases).
| Date | Insider |
|---|---|
| Sep 22, 2026Form 4 | LIN JEN-TSUNGVice PresidentSold · $1.6M · 10,000 sh |
| Sep 17, 2026Form 4 | Liu ChitungCFO & SVPSold · $58.0M · 400,000 sh |
| Sep 16, 2026Form 4 | Liu ChitungCFO & SVPSold · $170.8M · 1,200,000 sh |
| Jul 13, 2026Form 4 | Liu ChitungCFO & SVPSold · $294.3M · 1,900,000 sh |
| Jun 30, 2026Form 4 | HU CHE-JENVice PresidentSold · $1.7M · 10,000 sh |
Awards, exercises, withholding and plan purchases · 1 transaction
| Date | Insider |
|---|---|
| Sep 7, 2026Form 4 | Liu ChitungCFO & SVPOther · $0 · 2,000,000 sh |
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 · 48 filings
| Filed | What it is |
|---|---|
| Sep 29, 20266-K | Report of a foreign private issuer |
| Sep 4, 20266-K | Report of a foreign private issuer |
| Sep 2, 20266-K | Report of a foreign private issuer |
| Aug 26, 20266-K | Report of a foreign private issuer |
| Aug 14, 20266-K | Report of a foreign private issuer |
| Aug 6, 20266-K | Report of a foreign private issuer |
| Aug 5, 20266-K | Report of a foreign private issuer |
| Jul 30, 20266-K | Report of a foreign private issuer |
| Jul 29, 20266-K | Report of a foreign private issuer |
| Jul 29, 20266-K | Report of a foreign private issuer |
| Jul 21, 20266-K | Report of a foreign private issuer |
| Jul 15, 20266-K | Report of a foreign private issuer |
| Jul 14, 20266-K | Report of a foreign private issuer |
| Jul 6, 20266-K | Report of a foreign private issuer |
| Jun 29, 20266-K | Report of a foreign private issuer |
| Jun 23, 20266-K | Report of a foreign private issuer |
| Jun 22, 20266-K | Report of a foreign private issuer |
| Jun 18, 20266-K | Report of a foreign private issuer |
| Jun 16, 20266-K | Report of a foreign private issuer |
| Jun 5, 20266-K | Report of a foreign private issuer |
| Jun 3, 20266-K | Report of a foreign private issuer |
| May 27, 20266-K | Report of a foreign private issuer |
| May 22, 20266-K | Report of a foreign private issuer |
| May 20, 20266-K | Report of a foreign private issuer |
| May 15, 20266-K | Report of a foreign private issuer |
| May 13, 20266-K | Report of a foreign private issuer |
| May 12, 20266-K | Report of a foreign private issuer |
| May 11, 20266-K | Report of a foreign private issuer |
| May 8, 20266-K | Report of a foreign private issuer |
| May 7, 20266-K | Report of a foreign private issuer |
| Apr 30, 20266-K | Report of a foreign private issuer |
| Apr 30, 202620-F | Annual report (foreign private issuer), FY2025 — revenue $7.57B (+7% y/y), net income $1.28B, EPS $0.50 |
| Apr 29, 20266-K | Report of a foreign private issuer |
| Apr 29, 20266-K | Report of a foreign private issuer |
| Apr 21, 20266-K | Report of a foreign private issuer |
| Apr 15, 20266-K | Report of a foreign private issuer |
| Apr 8, 20266-K | Report of a foreign private issuer |
| Mar 26, 20266-K | Report of a foreign private issuer |
| Mar 12, 20266-K | Report of a foreign private issuer |
| Mar 5, 20266-K | Report of a foreign private issuer |
| Feb 25, 20266-K | Report of a foreign private issuer |
| Feb 25, 20266-K | Report of a foreign private issuer |
| Feb 24, 20266-K | Report of a foreign private issuer |
| Feb 13, 20266-K | Report of a foreign private issuer |
| Feb 5, 20266-K | Report of a foreign private issuer |
| Jan 28, 20266-K | Report of a foreign private issuer |
| Jan 14, 20266-K | Report of a foreign private issuer |
| Jan 7, 20266-K | Report of a foreign private issuer |
2025 · 47 filings
| Filed | What it is |
|---|---|
| Dec 30, 20256-K | Report of a foreign private issuer |
| Dec 17, 20256-K | Report of a foreign private issuer |
| Dec 10, 20256-K | Report of a foreign private issuer |
| Dec 4, 20256-K | Report of a foreign private issuer |
| Nov 28, 20256-K | Report of a foreign private issuer |
| Nov 20, 20256-K | Report of a foreign private issuer |
| Nov 12, 20256-K | Report of a foreign private issuer |
| Nov 6, 20256-K | Report of a foreign private issuer |
| Oct 29, 20256-K | Report of a foreign private issuer |
| Oct 29, 20256-K | Report of a foreign private issuer |
| Oct 28, 20256-K | Report of a foreign private issuer |
| Oct 27, 20256-K | Report of a foreign private issuer |
| Oct 21, 20256-K | Report of a foreign private issuer |
| Oct 15, 20256-K | Report of a foreign private issuer |
| Oct 7, 20256-K | Report of a foreign private issuer |
| Sep 22, 20256-K | Report of a foreign private issuer |
| Sep 10, 20256-K | Report of a foreign private issuer |
| Sep 4, 20256-K | Report of a foreign private issuer |
| Aug 13, 20256-K | Report of a foreign private issuer |
| Aug 12, 20256-K | Report of a foreign private issuer |
| Aug 6, 20256-K | Report of a foreign private issuer |
| Jul 30, 20256-K | Report of a foreign private issuer |
| Jul 30, 20256-K | Report of a foreign private issuer |
| Jul 28, 20256-K | Report of a foreign private issuer |
| Jul 22, 20256-K | Report of a foreign private issuer |
| Jul 10, 20256-K | Report of a foreign private issuer |
| Jul 7, 20256-K | Report of a foreign private issuer |
| Jun 30, 20256-K | Report of a foreign private issuer |
| Jun 20, 20256-K | Report of a foreign private issuer |
| Jun 10, 20256-K | Report of a foreign private issuer |
| Jun 5, 20256-K | Report of a foreign private issuer |
| Jun 4, 20256-K | Report of a foreign private issuer |
| May 28, 20256-K | Report of a foreign private issuer |
| May 15, 20256-K | Report of a foreign private issuer |
| May 8, 20256-K | Report of a foreign private issuer |
| Apr 24, 20256-K | Report of a foreign private issuer |
| Apr 24, 202520-F | Annual report (foreign private issuer), FY2024 — revenue $7.08B (−3% y/y), net income $1.48B, EPS $0.60 |
| Apr 23, 20256-K | Report of a foreign private issuer |
| Apr 23, 20256-K | Report of a foreign private issuer |
| Apr 10, 20256-K | Report of a foreign private issuer |
| Apr 1, 20256-K | Report of a foreign private issuer |
| Mar 20, 20256-K | Report of a foreign private issuer |
| Mar 11, 20256-K | Report of a foreign private issuer |
| Feb 26, 20256-K | Report of a foreign private issuer |
| Feb 11, 20256-K | Report of a foreign private issuer |
| Jan 21, 20256-K | Report of a foreign private issuer |
| Jan 13, 20256-K | Report of a foreign private issuer |
2024 · 31 filings
| Filed | What it is |
|---|---|
| Dec 27, 20246-K | Report of a foreign private issuer |
| Dec 18, 20246-K | Report of a foreign private issuer |
| Dec 11, 20246-K | Report of a foreign private issuer |
| Nov 25, 20246-K | Report of a foreign private issuer |
| Nov 14, 20246-K | Report of a foreign private issuer |
| Nov 13, 20246-K | Report of a foreign private issuer |
| Oct 30, 20246-K | Report of a foreign private issuer |
| Oct 22, 20246-K | Report of a foreign private issuer |
| Oct 9, 20246-K | Report of a foreign private issuer |
| Sep 12, 20246-K | Report of a foreign private issuer |
| Aug 19, 20246-K | Report of a foreign private issuer |
| Aug 9, 20246-K | Report of a foreign private issuer |
| Jul 31, 20246-K | Report of a foreign private issuer |
| Jul 17, 20246-K | Report of a foreign private issuer |
| Jun 12, 20246-K | Report of a foreign private issuer |
| May 30, 20246-K | Report of a foreign private issuer |
| May 23, 20246-K | Report of a foreign private issuer |
| May 14, 20246-K | Report of a foreign private issuer |
| Apr 25, 20246-K | Report of a foreign private issuer |
| Apr 25, 202420-F | Annual report (foreign private issuer), FY2023 — revenue $7.27B (−20% y/y), net income $1.96B, EPS $0.80 |
| Apr 24, 20246-K | Report of a foreign private issuer |
| Apr 16, 20246-K | Report of a foreign private issuer |
| Apr 3, 20246-K | Report of a foreign private issuer |
| Mar 25, 20246-K | Report of a foreign private issuer |
| Mar 25, 20246-K | Report of a foreign private issuer |
| Mar 22, 20246-K | Report of a foreign private issuer |
| Feb 27, 20246-K | Report of a foreign private issuer |
| Feb 26, 20246-K | Report of a foreign private issuer |
| Jan 31, 20246-K | Report of a foreign private issuer |
| Jan 26, 20246-K | Report of a foreign private issuer |
| Jan 25, 20246-K | Report of a foreign private issuer |
2023 · 23 filings — 22 × 6-K, 1 × 20-F
2022 · 26 filings — 25 × 6-K, 1 × 20-F
2021 · 27 filings — 25 × 6-K, 1 × 20-F, 1 × 6-K/A
2020 · 26 filings — 25 × 6-K, 1 × 20-F
2019 · 27 filings — 26 × 6-K, 1 × 20-F
2018 · 28 filings — 27 × 6-K, 1 × 20-F
2017 · 26 filings — 25 × 6-K, 1 × 20-F
2016 · 18 filings — 17 × 6-K, 1 × 20-F
Counted, not listed; the year is on EDGAR.
2015 · 20 filings — 19 × 6-K, 1 × 20-F
Counted, not listed; the year is on EDGAR.
2014 · 20 filings — 19 × 6-K, 1 × 20-F
Counted, not listed; the year is on EDGAR.
2013 · 21 filings — 19 × 6-K, 1 × 20-F, 1 × 6-K/A
Counted, not listed; the year is on EDGAR.
2012 · 19 filings — 18 × 6-K, 1 × 20-F
Counted, not listed; the year is on EDGAR.
2011 · 18 filings — 17 × 6-K, 1 × 20-F
Counted, not listed; the year is on EDGAR.
2010 · 19 filings — 18 × 6-K, 1 × 20-F
Counted, not listed; the year is on EDGAR.
2009 · 26 filings — 25 × 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 · 20 filings — 19 × 6-K, 1 × 20-F
Counted, not listed; the year is on EDGAR.
2006 · 22 filings — 20 × 6-K, 1 × 20-F, 1 × 20-F/A
Counted, not listed; the year is on EDGAR.
2005 · 24 filings — 23 × 6-K, 1 × 20-F
Counted, not listed; the year is on EDGAR.
2004 · 13 filings — 12 × 6-K, 1 × 20-F
Counted, not listed; the year is on EDGAR.
2003 · 18 filings — 17 × 6-K, 1 × 20-F
Counted, not listed; the year is on EDGAR.
2002 · 15 filings — 14 × 6-K, 1 × 20-F
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 · 36 filings — 30 × 3, 5 × 4, 1 × SD
| Filed | What it is |
|---|---|
| Sep 22, 20264 | Insider transaction (Form 4) |
| Sep 18, 20263 | Initial insider holdings (Form 3) |
| Sep 17, 20264 | Insider transaction (Form 4) |
| Sep 8, 20264 | Insider transaction (Form 4) |
| Jul 13, 20264 | Insider transaction (Form 4) |
| Jun 30, 20264 | Insider transaction (Form 4) |
| May 29, 2026SD | Specialized disclosure (conflict minerals) |
| May 7, 20263 | Initial insider holdings (Form 3) |
| May 7, 20263 | Initial insider holdings (Form 3) |
| May 7, 20263 | Initial insider holdings (Form 3) |
| May 7, 20263 | Initial insider holdings (Form 3) |
| May 7, 20263 | Initial insider holdings (Form 3) |
| May 7, 20263 | Initial insider holdings (Form 3) |
| May 7, 20263 | Initial insider holdings (Form 3) |
| May 7, 20263 | Initial insider holdings (Form 3) |
| May 7, 20263 | Initial insider holdings (Form 3) |
| May 7, 20263 | Initial insider holdings (Form 3) |
| May 7, 20263 | Initial insider holdings (Form 3) |
| May 7, 20263 | Initial insider holdings (Form 3) |
| May 7, 20263 | Initial insider holdings (Form 3) |
| May 7, 20263 | Initial insider holdings (Form 3) |
| May 7, 20263 | Initial insider holdings (Form 3) |
| May 7, 20263 | Initial insider holdings (Form 3) |
| May 7, 20263 | Initial insider holdings (Form 3) |
| May 7, 20263 | Initial insider holdings (Form 3) |
The newest 25 of 36 shown; the full year is on EDGAR.
2025 · 1 filing — 1 × SD
| Filed | What it is |
|---|---|
| May 29, 2025SD | Specialized disclosure (conflict minerals) |
2024 · 2 filings — 1 × S-8, 1 × SD
2023 · 2 filings — 1 × SC 13G/A, 1 × SD
Counted, not listed; the year is on EDGAR.
2022 · 4 filings — 1 × F-6 POS, 1 × S-8, 1 × SC 13G and 1 other form
Counted, not listed; the year is on EDGAR.
2021 · 1 filing — 1 × SD
Counted, not listed; the year is on EDGAR.
2020 · 8 filings — 3 × SC 13G/A, 2 × UPLOAD, 1 × CORRESP and 2 other forms
Counted, not listed; the year is on EDGAR.
2019 · 3 filings — 2 × SC 13G/A, 1 × SD
Counted, not listed; the year is on EDGAR.
2018 · 3 filings — 2 × SC 13G, 1 × SD
Counted, not listed; the year is on EDGAR.
2017 · 2 filings — 1 × F-6 POS, 1 × SD
Counted, not listed; the year is on EDGAR.
2016 · 6 filings — 3 × UPLOAD, 2 × CORRESP, 1 × SD
Counted, not listed; the year is on EDGAR.
2015 · 6 filings — 3 × UPLOAD, 2 × CORRESP, 1 × SD
Counted, not listed; the year is on EDGAR.
2014 · 7 filings — 4 × UPLOAD, 2 × CORRESP, 1 × SD
Counted, not listed; the year is on EDGAR.
2012 · 3 filings — 2 × UPLOAD, 1 × CORRESP
Counted, not listed; the year is on EDGAR.
2011 · 6 filings — 2 × SC 13G/A, 2 × UPLOAD, 1 × CORRESP and 1 other form
Counted, not listed; the year is on EDGAR.
2010 · 4 filings — 2 × UPLOAD, 1 × CORRESP, 1 × SC 13G
Counted, not listed; the year is on EDGAR.
2009 · 5 filings — 2 × UPLOAD, 1 × CORRESP, 1 × EFFECT and 1 other form
Counted, not listed; the year is on EDGAR.
2007 · 2 filings — 1 × F-6 POS, 1 × S-8
Counted, not listed; the year is on EDGAR.
2006 · 2 filings — 1 × F-6 POS, 1 × UPLOAD
Counted, not listed; the year is on EDGAR.
2005 · 3 filings — 1 × CORRESP, 1 × S-8, 1 × UPLOAD
Counted, not listed; the year is on EDGAR.
2004 · 1 filing — 1 × SC 13G/A
Counted, not listed; the year is on EDGAR.
2003 · 3 filings — 2 × SC 13G, 1 × S-8
Counted, not listed; the year is on EDGAR.
2002 · 4 filings — 2 × 424B5, 1 × F-3/A, 1 × SC 13G/A
Counted, not listed; the year is on EDGAR.
2001 · 6 filings — 3 × SC 13G, 3 × SC 13G/A
Counted, not listed; the year is on EDGAR.
2000 · 1 filing — 1 × SC 13D/A
Counted, not listed; the year is on EDGAR.
1999 · 1 filing — 1 × SC 13D/A
Counted, not listed; the year is on EDGAR.
1997 · 3 filings — 2 × SC 13D, 1 × SC 13D/A
Counted, not listed; the year is on EDGAR.
About this data
United Microelectronics Corporation (NEW) (UMC) has 732 filings on EDGAR going back to 1997: 26 annual reports, 0 quarterly reports and 581 current reports, plus proxy statements, insider forms and ownership schedules. Its latest annual report, a 20-F, was filed on Apr 30, 2026 for the fiscal year ended Dec 31, 2025. The most recent 8-K, on Sep 29, 2026, covered a material event. Over the last 13 months insiders sold $526.4M in 5 sales and bought nothing on the open market; 1 other transaction (awards, exercises, tax withholding, gifts and plan purchases). Not investment advice.
Every row is a filing EDGAR lists for the registrants that have been United Microelectronics Corporation (NEW), 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 UMC's latest 10-K?
- UMC's latest annual report, a 20-F, was filed on Apr 30, 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 UMC last file an 8-K?
- On Sep 29, 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 UMC insiders buying or selling?
- Over the last 13 months insiders sold $526.4M in 5 sales and bought nothing on the open market; 1 other transaction (awards, exercises, tax withholding, gifts and plan purchases). The most recent sale: LIN JEN-TSUNG (Vice President) sold 10,000 shares on Sep 22, 2026 for $1.6M. 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 UMC made?
- 732 filings are on EDGAR under the registrant records that have been United Microelectronics Corporation (NEW), going back to 1997; 35 of them are insider ownership forms (Forms 3, 4, 5 and 144).