Both the political action committee and the advocacy arm were established by former President Trump’s former campaign manager, Brad Parscale.
Brad Parscale, former campaign manager for President Donald Trump’s 2020 re-election campaign, established both the American Greatness Fund and the American Greatness PAC in February 2021. The Trump 2020 campaign fired Parscale, but he reportedly returned to Trump’s inner circle in early 2021 when he started the political action committee and its sister advocacy group. 
American Greatness PAC filed a statement of organization with the Federal Election Commission in February 2021. Two weeks later that same month, Parscale incorporated the American Greatness Fund in Delaware. 
Parscale said upon launching the advocacy group, “American Greatness Fund will provide transparent data research and visualization, which will offer an accurate state-by-state aggregation of all needed, ongoing, and completed efforts towards voting integrity.” 
Shortly after Parscale created the American Greatness PAC, Trump launched his own political fundraising operation that included a Trump store online.