| 14 | 2012 | Every Little Mistake ⇒ 0 | June 16 - June 17 |
| 15 | 2013 | Everybody Lives at Most Once | June 15 - June 16 |
| 16 | 2014 | Ego Loss May Occur | June 15 and June 21 |
| 17 | 2015 | Ex-Lincoln Math Olympiad | June 21 |
| 18 | 2016 | Elmo Lives Mostly Outside | June 18 and June 19 |
| 19 | 2017 | vEry badLy naMed cOntest | June 10 and June 17 |
| 20 | 2018 | Eyy LMaO | June 9 and June 16 |
| 21 | 2019 | Exclusively carL-Made Olympiad | June 8 and June 16 |
| 22 | 2020 | ELMO Literally Moved Online | July 20 and July 21 |
| 23 | 2021 | Olympians Enjoy Mixed-up Letters | June 17 and June 18 |
| 24 | 2022 | Elmo, Let Me Out! | June 11 and June 19 |
| 25 | 2023 | ELMOnade / waterELMOn | June 10 and June 18 |
| 26 | 2024 | abcdEfghijkLMnOpqrstuvwxyz | June 8 and June 15 |
| 27 | 2025 | Elmo Like Swapping Math Olympiads | June 14 and June 21 |
