SEC Form 4: Byrne Timothy W exercised 7,500 units of USLM Common Stock at a strike of $114.00, gifted 250 units of USLM Common Stock, sold $1,071,924 worth of USLM Common Stock (5,000 units at $214.38) and covered exercise/tax liability with 3,974 units of USLM Common Stock, decreasing direct ownership by 5% to 30,035 units