144 1 Fatzinger144filing060518.txt FATZINGER144FILING060518.TXT 1a Mantech Internaltional 1b 22-1852179 1c 000-49604 2a Walter R. Fatzinger 3b Bloomberg Tradebook LLC 3c 2000 3d 110,900 3f 06/05/2018 3g NASDAQ