** Shares of videogame software maker Unity Software U.N climb 8.8% to $32.30 premarket

** Stock set to open at its highest level in over four months, if gains hold

** Brokerage Jefferies raises its PT on stock to $35 from $29, the highest on Wall Street, according to data compiled by LSEG

** New PT represents a near 18% upside to stock's last closing price of $29.69

** Jefferies says it noted incrementally positive comments about U's ad targeting model Vector in its Q2 mobile game Ad Tech survey

** "We expect the impact of Vector to be seen over multiple quarters, and are overall encouraged by the q/q improvement," Jefferies says

** Brokerage maintains "buy" rating on stock; raises its FY25 and FY26 revenue forecasts by 2% and 3%, respectively

** Of the 29 brokerages that cover the stock, 14 rate it "buy" or higher, 14 "hold" and one "sell"; their median PT is $25.9

** As of Tuesday's close, stock was up about 32% YTD

(Reporting by Shashwat Chauhan in Bengaluru)

((Shashwat.Chauhan@thomsonreuters.com))