** Dating app Grindr's GRND.N shares rise 3.2% to $13.15 after the bell
** Shareholders Ray Zage and James Lu send letter to GRND's board stating interest in exploring the possibility of taking it private
** While there is no proposal yet, the board has established a special committee with disinterested and independent directors if a definitive proposal, including committed financing, is made
** Zage is a member of GRND's board and Lu is chair of the board
** GRND has lost over 28% YTD
(Reporting by Juby Babu in Mexico City)
((Juby.Babu@thomsonreuters.com))