 LOS ANGELES--BUSINESS WIRE--- LFST CLASSACTION--Glancy Prongay Murray LLP GPM, a leading national shareholder rights law firm, today announced that it has commenced an investigation on behalf of LifeStance Health Group, Inc. LifeStance or the Company NASDAQ: LFST investors concerning the Companys possible violations of the federal securities laws. If you suffered a loss on your LifeStance investments or would like to inquire about potentially pursuing claims to recover your loss under the fede 