Quarterly Returns (%)United Microelectronics Corporation
| Years | Q1 | Q2 | Q3 | Q4 | Annual |
|---|---|---|---|---|---|
| 2000 | 0 | 0 | -14.9 | -21.4 | 0 |
| 2001 | 13.6 | 4.4 | -41.7 | 88.9 | 15.9 |
| 2002 | 9.8 | -31.6 | -48.7 | -5.3 | -64.7 |
| 2003 | -11.1 | 25 | 815 | 9.8 | 1016.7 |
| 2004 | 5 | -17.1 | -15.4 | 4.7 | -22.9 |
| 2005 | -4.5 | 21.6 | -12.2 | -13.3 | -11.6 |
| 2006 | 9.5 | -8.7 | 51.1 | 13 | 70.8 |
| 2007 | -9 | 6.5 | 5.1 | -5.9 | 2.1 |
| 2008 | -2.5 | -13.3 | -33.2 | 0 | -43.5 |
| 2009 | 29.6 | 4 | 44 | 2.3 | 98.5 |
| 2010 | -3 | -22.7 | -2 | 13.7 | -16.4 |
| 2011 | -13.8 | -6.2 | -19.3 | 12.3 | -26.8 |
| 2012 | 14.6 | -11.7 | -4.7 | -3.6 | -3.1 |
| 2013 | -10.1 | 30.1 | -12.9 | -1.2 | 5 |
| 2014 | 2.4 | 15.8 | -14.7 | 14.2 | 15.6 |
| 2015 | 7.3 | -15.9 | -17.8 | 16.1 | -14 |
| 2016 | 10.8 | -4.4 | -2.8 | -5.3 | -2.4 |
| 2017 | 10.5 | 26.3 | 6.2 | -5 | 41.4 |
| 2018 | 8.3 | 9.8 | -6.9 | -30.6 | -21.8 |
| 2019 | 5 | 17.1 | -6 | 26.1 | 49.7 |
| 2020 | -5 | 4 | 8 | 74.2 | 214.6 |
| 2021 | 8.1 | 3.7 | 21 | 2.4 | 38.8 |
| 2022 | -22.1 | -25.8 | -17.7 | 17.2 | -44.2 |
| 2023 | 34.2 | -10 | -10.5 | 20.5 | 29.6 |
| 2024 | -4.6 | 8 | 3 | -3.1 | -23.4 |
| 2025 | 1.2 | 0 | 0 | 1.2 |