Total traffic increased by six percent to 8.8 million metric tons, driving a 7 percent rise in revenue to $29.2 million.
Pre-tax profit shrunk, however, by 59 percent to $2.6 million from $6.35 million in the first half of 2009.
The Greek government cancelled an international tender to privatize Thessaloniki's container facilities last year after Hong Kong's Hutchison Port Holdings withdrew its bid on the eve of signing a draft contract with the state-controlled Port Authority.
Hutchison forfeited a $6.4 million guarantee which was booked as extraordinary income in the second half accounts.
Greece's largest port, Piraeus, which handed over management of two of its container terminals to China's Cosco Pacific in October, handled 376,727 TEUs in the first half of 2010.
The Piraeus terminals generated revenue of $46.6 million but booked a net loss of $10.6 million mainly due to start up costs.