financial sector I can recommend
Sampath, HNB, Commercial, Vallible Finance, Lfin, DFCC, NDB
Insurance - HNB Assurance, AIA, Union Assurance
F& B - Cargills,
Diversified - JKH, Hemas, Richard Pieris
Manufacturing - All tile companies(RCL,TILE,LWL), Tokyo, Teejay, Alumex, Swisstek
Power - Lanka IOC, Vallible Power
Plantations - Malwatte, Lankem Developments, Hatten Plantations, Watawala, Elpitiya, Talawakelle