Feb 13 (Reuters) - Karman Holdings ( KRMN ) and some of its

existing shareholders raised $506 million in an upsized New York

initial public offering, fetching a valuation of nearly $3

billion for the defense and space systems maker.

They sold 23 million shares on Wednesday at $22 apiece,

above the marketed range of $18 to $20, the Huntington Beach,

California-based company said.

Karman ( KRMN ) sold roughly 8.4 million shares, and the others,

about 14.6 million. They had earlier aimed for a sale of roughly

21 million shares.

Shares of the company, backed by private equity firm Trive

Capital, will start trading on the New York Stock Exchange on

February 13, under ticker symbol "KRMN".

Trive Capital will continue to own a majority of the voting

power at Karman ( KRMN ) after the IPO.