Leading Financial Trade Associations, Led by LSTA, Submit Amicus Brief in Support of Defendant Lenders in Antitrust Case Filed by Optumum Communications Mar 26, 2026 9:43 AM Eastern Daylight Time Leading Financial Trade Associations, Led by LSTA, Submit Amicus Brief in Support of Defendant Lenders in Antitrust Case Filed by Optumum Communications Share NEW YORK--(BUSINESS WIRE)-- LSTA, the trade association for the U.S. corporate lending market, today was joined by SIFMA, the MFA, the Investment Company Ins ...