Slavic401k is an innovative leader in retirement services and a top provider of 401(k) plans to more than 12,000 employers an ... d 250,000 employees across the U.S. With over $9B in assets under management and growing. Slavic401k is one of the fastest growing 401(k) providers in the U.S. Established over 30 years ago by current president and CEO John Slavic, Slavic401k specializes in multiple employer and pooled employer 401(k) plans and have built our business around providing a 401(k)-administration platform that is custom-tailored to the meet the unique needs of PEOs, financial advisors, associations and service bureaus. read more