Space firm Karman falls after launching secondary offering

Defense and space systems maker Karman Holdings' KRMN.N shares fall 6.1% to $52.80 premarket

KRMN late Monday launched secondary offering of 20 million shares being offered by some existing stockholders

Selling shareholders include private equity firm Trive Capital and Karman CEO Tony Koblinski

Citigroup and Evercore ISI are book-running managers for proposed offering

KRMN went public in February after 23 million share IPO priced at $22 apiece

All five brokerages covering stock rate "buy" or higher; median PT $50.50 - data compiled by LSEG

As of last close, KRMN stock has more than doubled since debut on February 13