** Kosmos Energy KOS.N shares down 11.6% at $2.13 post-market as oil and gas producer seeks equity
** Dallas, Texas-based firm launches $175 mln stock offering to repay debt
** Barclays and Stifel joint bookrunners
** Co has ~481 mln shares outstanding for ~$1.2 bln market cap
** Stock ended down 5.9% at $2.41 on Tues, trimming YTD gain to ~166%
** Avg rating of 10 analysts is "buy"; median PT $2.40, per LSEG
(Lance Tupper is a Reuters market analyst. The views expressed are his own)
((lance.tupper@tr.com 1-646-279-6380))