shares in siemens energy ag and its windenergy subsidiary siemens gamesa renewable energy sa traded lower on wednesday after the companies said their secondquarter results were dragged by a spate of challenges at 0750 gmt shares in germanys siemens energy were 49 lower at eur1861 while siemens gamesa shares were down 19 at eur1513 siemens energy which is 35 controlled by siemens ag swung to an adjusted loss before interest taxes and amortization in the quarter ended march 31 according to preliminary results released late tuesday it said it is reassessing its guidance after madridlisted siemens gamesa in which it controls 67 scrapped its fullyear outlook gamesa said late tuesday that its secondquarter performance was severely hit by product and execution issues the windturbine maker is seeing more headwinds from its 5x platform rampup process as well as pressure on energy commodities and transportation costs lack of availability of key turbine components and harbor congestions jefferies analysts said in a note describing gamesas results as frustrating parent siemens energy said the war in ukraine has also hit revenue and profitability and aggravated existing supplychain constraints it said it couldnt put a figure on the potential hit for the remainder of its fiscal year amid uncertainty over sanctions on russia