Fitchburg Gas and Electric Light Company d/b/a Unitil
- 2023 - annual return
- 2022 - annual return
- 2021 - annual return
- 2020 - annual return
- 2019 - annual return
- 2018 - annual return
- 2017 - annual return
- 2016 - annual return
- 2015 - annual return
- 2014 - annual return
- 2013 - annual return
- 2012 - annual return
- 2011 - annual return
- 2010 - annual return
- 2009 - annual return