Telecom , Sri Lankan Airline
There was a time for waiting list to get a telephone for more than 20 years!! when only Telecom had monopoly.
Many a singer, musician had to bribe SLBC to air their songs , works- Not any more
Many films and drama face the above plight when only SLRC /ITN had duo poly
We never got good Tea locally before estates were made companies ! eg Watawala,Zesta, etc
Sri Lankan Air line also did well under Peter Hill before MR sent him home as he did not agree cancel a booked flight and allocate it to MR and his entourage!(as no booking till last day!) and MR spent state money to buy Emirate's share in Srilankan. He did the same to Shell Gas back . The results in both under state is known and not worth repeating!
Many more....
lesson- Privatization does not mean to sell outright but to manage them correctly with best people. Govt can also do business efficiently eg Singapore Airline there were local examples too but now privatized.
It all depends on Government Servants (not politicians) who are in charge of these institutions.