Net income reached 167.5 billion won (US$142.4 million) in the July-September period, compared with 203.4 billion a year ago, KT&G said in a regulatory filing.
Sales added 9.7 percent annually to 706 billion during the same period, while operating profit fell 22.3 percent to 217 billion won.
Shares of KT&G fell 1.53 percent to 71,000 won as of 11:39 a.m. on the Seoul bourse.
"A rise in operating cost sparked by foreign exchange losses hurt our third-quarter performance, "KT&G said.
The South Korean won has gained about 36 percent versus the U.S. dollar since early March.
In January, KT&G said it is targeting 2.99 trillion won in sales and 1.15 trillion won in operating profit for this year.

More News:
Market Updates |
Stock Alerts |
All Trading News |
Stock Index