X0101 EFFECT 33 LIVE 2009-12-01 0000950123-09-051260 485APOS 0000030126 BURNHAM INVESTORS TRUST 002-17226 S000002997 Burnham Fund C000082356 Class I S000002998 Burnham Financial Services Fund C000082357 Class I S000002999 Burnham Financial Industries Fund C000082358 Class I