** Oil and gas producer Kosmos Energy KOS.N shares down 15.4% premarket to $2.04 after ~$185.3 mln follow-on priced

** Dallas, Texas-based KOS late Tues sold 97.5 mln shares at $1.90, 21.2% discount to last sale

** Co, which had launched $175 mln offering, intends to use net offering proceeds to repay debt

** Barclays and Stifel joint bookrunners

** Co has ~481 mln shares outstanding

** Stock up ~166% YTD at Tues close

** 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))