UNITED MICROELECTRONICS CORP (UMC) - Dilution Analysis

Visualizing historical and potential share dilution over time

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Dilution Analysis

Low Risk

Limited dilution potential

Last updated: April 30, 2026

Risk Assessment Details

Potential Dilution: 0.0% of current shares

Recent Dilution: 0.22% (2 years)

Historical Dilution Factor: minimal recent dilution

Outstanding Shares

13B

Potential Supply

Additional shares possible

Splits

None

Past 2 years

Summary

UMC currently has 12.6B outstanding shares. with minimal authorized share overhang for future dilution. The company has minimally diluted shareholders by 0.22% over the past 2 years.

Share Structure Timeline

Outstanding Shares

Total Supply

Historical Data Points

Date	Event	Outstanding
Apr 30, 2026	20-F filing \| 12588.2M shares outstanding	13B
Apr 24, 2025	20-F filing \| 12560.7M shares outstanding	13B
Apr 25, 2024	20-F filing \| 12529.8M shares outstanding	13B
Apr 27, 2023	20-F filing \| 12504.7M shares outstanding	13B
Apr 28, 2022	20-F filing \| 12483.2M shares outstanding	12B
Apr 29, 2021	20-F filing \| 12422.4M shares outstanding	12B
Apr 28, 2020	20-F filing \| 11724.3M shares outstanding	12B

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