From the Document: "The security assistance the Biden Administration is providing to Ukraine is enabling critical success on the battlefield against the Russian invading force.  The Administration is working around the clock to fulfill Ukraine's priority security assistance requests, delivering weapons from U.S. stocks when they are available, and facilitating the delivery of weapons by allies and partners when their systems better suit Ukraine's needs. [...]  The Administration is continuing to work with allies and partners to identify additional weapons systems to help the Ukrainian military defend its country. [...]  On April 5, the Administration announced an additional $100 million in security assistance to Ukraine through Presidential Drawdown Authority. The Administration also announced $300 million in security assistance on April 1 under authorities provided by the Ukraine Security Assistance Initiative.  These announcements bring the U.S. commitment to more than $1.7 billion in security assistance since Russia's February 24 invasion, and $2.4 billion since the beginning of the Administration."
U.S. Department of Defense: https://www.defense.gov/