Dec 18 (Reuters) - ABM Industries Q4 adjusted EBITDA margin 6.1%. * Q4 EPS USD -0.19 * Q4 revenue USD 2,200 million vs. IBES estimate USD 2,079 million * Q4 adjusted EBITDA USD 128 million vs. IBES estimate USD 124.9 million * Q4 net income USD -11.7 million * outlook FY adjusted EBITDA margin 6.3-6.5% * outlook FY adjusted EPS USD 3.6-3.8