- The Banana Splits Movie (2019) as "Eric"
- Breakaway (2011) as "Tim Appleby"
- The Goon (2015) as "Young Goon"
- Max & Shred (2014) as "Max Asher" (TV movie)
- The Other Kingdom (2015) as "Prince Jasper" (TV movie)
- The Next Step (2013-2017) as "Ethan Turner"
- Backstage (2016-2017) as "Miles Parker"
- Odd Squad (2014-2018) as "Otis"
- The Stanley Dynamic (2015-2017) as "Henry Quinn"
- Some Assembly Required (2014) as "Logan Abbott"
- The Stanley Dynamic (2014) as "Henry Quinn"
- My Babysitter's a Vampire (2011-2012) as "Rory Webber"
Soponidis has also appeared in several short films and made guest appearances in television shows like "The Haunting Hour: The Series", "Life with Boys", and "Lost Girl".