Finances The Porter Foundation makes available its most recent IRS Forms 990-PF: 2021 – 990-PF 2020 – 990-PF 2019 – 990-PF 2018 – 990-PF 2017 – 990-PF 2016 – 990-PF 2015 – 990-PF 2014 – 990-PF 2013 – 990-PF 2012 – 990-PF 2011 – 990-PF