PacWest kicking Mantech out of S&P MidCap 400Apr. 2, 2014 6:00 PM ET|About: PacWest Bancorp (PACW)|By: Eric Jhonsa, SA News Editor PacWest Bancorp (PACW) will take Mantech's (MANT) place in the S&P 400 following Monday's close. Mantech, in turn, will take PacWest's place in the S&P SmallCap 600. PACW +1% AH. MANT -1.2%.