TOPEKA, Kan. (AP) — A class-action lawsuit has been filed saying that Westar Energy executives undervalued the company when selling it to Great Plains Energy.

Westar’s board of directors agreed to sell the company for about $12.2 billion on May 29. According to the agreement, stockholders will receive $51 in cash and $9 in Great Plains stock.

Westar stockholder Troy Miller says that is unacceptable and filed the suit against the two companies and eight executives Wednesday. Miller says Westar’s stock price increased 55 percent in the year before its sale, but the $60 stock price Great Plains paid is only a 13 percent increase in Westar’s stock price.

He says Great Plains will get an increasingly valuable company, but will pay much less than what it is worth.

Westar spokeswoman Gina Penzig says the company cannot comment on pending litigation.