** Shares of investment accounting software provider Clearwater Analytics CWAN.N fall 3.6% to $29.90 in extended trade

** CWAN launches a secondary public offering of 25 mln Class A shares worth $775.5 mln based on the stock's last close

** Private equity firms Welsh, Carson, Anderson & Stowe, Warburg Pincus and Permira Advisers are selling shares in the offering

** CWAN has 247 mln outstanding shares with a $7.88 bln market capitalization - LSEG data

** J.P. Morgan is the sole book-running manager for the proposed offering

** As of last close, CWAN shares up ~55% YTD

(Reporting by Arasu Kannagi Basil in Bengaluru)

((ArasuKannagi.Basil@thomsonreuters.com;))