UK's 3i rises as portfolio firm buys out remaining stakes in six UK biogas plants
** Shares of private equity group 3i Group III.L up 1.8% at 2,352p
** Co's portfolio company Future Biogas agrees to buy the remaining 49% stake in six UK anaerobic digestion plants for £104 mln ($138.91 mln)
** Co says purchase price is consistent with its September 2026 valuation assumptions for plants as part of Future Biogas
** Including session gains, stock down 27.7%
($1 = 0.7487 pounds)