X0101 EFFECT 33 LIVE 2008-10-03 0001193125-08-181539 485APOS 0000710124 NORTHERN INSTITUTIONAL FUNDS 002-80543 S000023949 NORTHERN INSTITUTIONAL TREASURY PORTFOLIO C000070152 SHARES S000023949 NORTHERN INSTITUTIONAL TREASURY PORTFOLIO C000070153 SERVICE SHARES S000023949 NORTHERN INSTITUTIONAL TREASURY PORTFOLIO C000070154 PREMIER SHARES