Beta0% was sold under disclosed trading plans, 100% with no plan disclosed. The largest seller, Chitung Liu (CFO & SVP), sold $523M.Share-of-stake figures for this company are being verified and will be added when that check is finished. Why
Officers and directors of non-US companies only began filing Forms 3 and 4 on March 18, 2026 (a new SEC rule), so this page covers the period since then. Their 10% holders still do not file. The SEC rule
A share of stake is shown for 0 of the 3 officers and directors who sold. 25 are left out Disclosed company stock is not an insider's whole wealth.i
Left out: Chia-Tsung Hung, Jason Wang, Ming-Chih Hsu, Chitung Liu, Kuei-Chun Hung, Oliver Chang, Ming-Yu Lin, Chung-Hsien Wu, Che-Jen Hu, Tzyy-Ming Cheng, Ming-Tsung Chen, Jin-Shuang Chen, Shih-Wei Liu, Shih-Chieh Hsu, Shu-Fen Hsu, Shih-Fang Tzou, Ying-Sheng Shen, Jen-Tsung Lin, Yu-Chih Chuang, Lin-Wu Kuo, Ching Liao, Wen Tan, Hung-Yu Yen, Chia-Ao Lu and Su-Lin Wang (share of stake is being verified).
Officers and directors, since March 18, 2026. Their share of stake is being verified and is not shown yet; amounts and trading plans are below.
Officers and directors, Mar 2026 to Oct 2026. Each sale is counted once: under a disclosed plan, else to cover taxes, else no plan disclosed.
| Who | Shares | Price | % of total stake | Total stake after | Trade date | Filed |
|---|---|---|---|---|---|---|
| Jen-Tsung Lin Vice President | 10,000 | $163.00 | n/a | n/a | Sep 22, 2026 | Sep 22, 2026 |
| Who | Shares | Price | % of total stake | Total stake after | Trade date | Filed |
|---|---|---|---|---|---|---|
| Chitung Liu CFO & SVP | 400,000 | $145.00 | n/a | n/a | Sep 17, 2026 | Sep 17, 2026 |
"% of total stake" is the shares in an event against all the vested shares the person held that day, across every share class and holding entity, after that day's vesting. "n/a" means the person's holdings are not confirmed, or the row is a purchase. "Holdings record incomplete" means more shares were sold than the filings show the person held that day, so a percentage would be wrong.
No. Jason Wang reported no open-market sales since March 18, 2026.
Filings rarely give a reason, and we don't guess at one. What they show is how the sales were made: 0% of sales by value ran under 10b5-1 trading plans disclosed in the filings and 100% had no disclosed plan. A trading plan schedules sales in advance.
No. Officers and directors reported no purchases since March 18, 2026.
| Who sold | Amount | % of holdings | Trading plan |
|---|---|---|---|
| Chitung Liu CFO & SVP | $523M 3.50M shares | Not confirmedshare of stake is being verified. Why | No plan disclosed |
| Che-Jen Hu Vice President | $1.7M 10K shares | Not confirmedshare of stake is being verified. Why | No plan disclosed |
| Jen-Tsung Lin Vice President | $1.6M 10K shares | Not confirmedshare of stake is being verified. Why | No plan disclosed |
Vested shares across all share classes, held directly and through trusts, LLCs and family members, as reported on SEC Forms 3, 4 and 5. Unvested awards and options are never counted as owned shares.
| Insider | Held Mar 17, 2026 | Sold | Held Oct 16, 2026 | Still held |
|---|---|---|---|---|
Chia-Tsung Hung!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Chia-Tsung Hung are complete. Chairman & CSO, Director | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Chia-Tsung HungHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Chia-Tsung Hung are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Jason Wang!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Jason Wang are complete. Chief Executive Officer, Director | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Jason WangHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Jason Wang are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Ming-Chih Hsu!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Ming-Chih Hsu are complete. President & COO, Director | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Ming-Chih HsuHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Ming-Chih Hsu are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Chitung Liu!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. See the filing Sales and other transactions for Chitung Liu are complete. CFO & SVP | n/a | −3.50M | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Chitung LiuHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Chitung Liu are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Kuei-Chun Hung!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Kuei-Chun Hung are complete. SVP | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Kuei-Chun HungHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Kuei-Chun Hung are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Oliver Chang!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Oliver Chang are complete. SVP | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Oliver ChangHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Oliver Chang are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Ming-Yu Lin!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Ming-Yu Lin are complete. Vice President | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Ming-Yu LinHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Ming-Yu Lin are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Chung-Hsien Wu!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Chung-Hsien Wu are complete. Ciso & SVP | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Chung-Hsien WuHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Chung-Hsien Wu are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Che-Jen Hu!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Che-Jen Hu are complete. Vice President | n/a | −10K | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Che-Jen HuHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Che-Jen Hu are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Tzyy-Ming Cheng!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Tzyy-Ming Cheng are complete. Vice President | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Tzyy-Ming ChengHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Tzyy-Ming Cheng are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Ming-Tsung Chen!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Ming-Tsung Chen are complete. Vice President | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Ming-Tsung ChenHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Ming-Tsung Chen are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Jin-Shuang Chen!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Jin-Shuang Chen are complete. CHRO & VP | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Jin-Shuang ChenHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Jin-Shuang Chen are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Shih-Wei Liu!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Shih-Wei Liu are complete. Vice President | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Shih-Wei LiuHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Shih-Wei Liu are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Shih-Chieh Hsu!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Shih-Chieh Hsu are complete. Vice President | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Shih-Chieh HsuHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Shih-Chieh Hsu are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Shu-Fen Hsu!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Shu-Fen Hsu are complete. Vice President | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Shu-Fen HsuHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Shu-Fen Hsu are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Shih-Fang Tzou!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Shih-Fang Tzou are complete. Vice President | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Shih-Fang TzouHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Shih-Fang Tzou are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Ying-Sheng Shen!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Ying-Sheng Shen are complete. Vice President | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Ying-Sheng ShenHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Ying-Sheng Shen are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Jen-Tsung Lin!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. See the filing Sales and other transactions for Jen-Tsung Lin are complete. Vice President | n/a | −10K | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Jen-Tsung LinHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Jen-Tsung Lin are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Yu-Chih Chuang!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Yu-Chih Chuang are complete. Vice President | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Yu-Chih ChuangHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Yu-Chih Chuang are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Lin-Wu Kuo!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Lin-Wu Kuo are complete. Vice President | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Lin-Wu KuoHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Lin-Wu Kuo are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Ching Liao!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Ching Liao are complete. General Counsel & VP | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Ching LiaoHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Ching Liao are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Wen Tan!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Wen Tan are complete. Vice President | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Wen TanHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Wen Tan are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Hung-Yu Yen!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Hung-Yu Yen are complete. CHRO & VP | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Hung-Yu YenHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Hung-Yu Yen are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Chia-Ao Lu!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Chia-Ao Lu are complete. Vice President | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Chia-Ao LuHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Chia-Ao Lu are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Su-Lin Wang!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Su-Lin Wang are complete. Director | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Su-Lin WangHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Su-Lin Wang are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Holdings and share of stake for United Microelectronics Corp are being verified, so no balances, unit counts or percentages are shown. Sales, proceeds, plan and tax status, titles and dates come straight from individual filings.
Officer and director open-market sales: $526M across 3,520,000 shares. Plan status and stated purpose are separate questions, and a sale can have both.
Sales with no 10b5-1 plan and no tax reference in the filing. $523M of it is Chitung Liu. No plan disclosed is a statement about the filing, not about why the sale happened. Largest such sale: Chitung Liu, Jul 13, 2026
| Seller | Shares sold | Proceeds | Under a disclosed plan | Share of total | Sales dates |
|---|---|---|---|---|---|
| Chitung Liu CFO & SVP | 3.50M | $523M | 0% | 99% | Jul 13, 2026 to Sep 17, 2026 |
| Che-Jen Hu Vice President | 10K | $1.7M | 0% | 0.3% | Jun 30, 2026 to Jun 30, 2026 |
| Jen-Tsung Lin Vice President | 10K | $1.6M | 0% | 0.3% | Sep 22, 2026 to Sep 22, 2026 |
| Month | Sale proceeds | Disclosed plan | To cover taxes | No plan disclosed |
|---|---|---|---|---|
| Mar 2026 | $0 | $0 | $0 | $0 |
| Apr 2026 | $0 | $0 | $0 | $0 |
| May 2026 | $0 | $0 | $0 | $0 |
| Jun 2026 | $1.7M | $0 | $0 | $1.7M |
| Jul 2026 | $294M | $0 | $0 | $294M |
| Aug 2026 | $0 | $0 | $0 | $0 |
| Sep 2026 | $230M | $0 | $0 | $230M |
| Oct 2026 | $0 | $0 | $0 | $0 |
Holdings and share of stake are being verified. Balances, unit counts and every share-of-stake figure for United Microelectronics Corp are held back until that check is finished. Sales, proceeds, plan and tax status, titles and dates come straight from individual filings and are complete.
External context: we only cite outside events when a documented connection exists. None is shown for this period.
All 35 Forms 3, 4 and 5 on record for United Microelectronics Corp (SEC CIK 1033767), filed from Mar 18, 2026 to Sep 22, 2026; 35 of them were filed in the 12 months this page covers, retrieved from SEC EDGAR on Oct 16, 2026. Prices are the ones reported in each filing, often weighted averages.
Holdings. Each holding line (a share class plus an owner, such as a trust or LLC) carries its last reported balance forward. Entities first reported during the period start at zero, so transfers between an insider's own trusts don't count as selling. Lines not reported for three years or more are listed separately and left out of totals.
Sales. A sale counts as under a 10b5-1 plan if its footnote cites one or the filing's Rule 10b5-1 box is checked, and as tax-related if its footnote cites tax obligations or sell-to-cover. Shares withheld by the company for taxes are listed separately. Sales with neither attribute are labeled "no plan disclosed".
| Name | Last filed | Last reported balance |
|---|---|---|
| Lih-Juann Chen | No balance on record | |
| Jyuo-Min Shyu | No balance on record | |
| Kuang-Si Shiu | No balance on record | |
| Wen Hsu | No balance on record | |
| Ling-Ling Wu | No balance on record |
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