Berger Action Fund, the nonprofit group founded by billionaire megadonor Hansjörg Wyss, sent $31 million to the Sixteen Thirty Fund between April 2020 and March 2021, according to a new tax filing obtained by POLITICO. The Sixteen Thirty Fund has become a massive force on the left in recent years, growing from an operation that moved a few million dollars per year early in the last decade to a $400 million behemoth in the final year of Donald Trump’s presidency. Sixteen Thirty Fund’s total revenue climbed from $138 million in 2019 to $390 million in 2020, according to its tax filings. Meanwhile, Berger Action Fund’s 2020 grant to the group was down several million dollars from its 2019 fiscal year, when the Wyss group gave $34.9 million. Other major known donors to the Sixteen Thirty Fund in 2020 include tech billionaire Pierre Omidyar, who said he and his wife gave $45 million to one of the group’s projects.