Updates stock activity, adds context
** Shares of ride-hailing firm Lyft LYFT.O up 2.2% to $12.49 after rising as high as $13.20 in early afternoon trading on Tues after activist investor news
** Hedge fund Engine Capital Management gearing up for a boardroom fight and has nominated director candidates, sources familiar with the matter told Reuters
** The activist investor has pushed co in recent weeks to address its sagging stock price and strategy, the sources said
** LYFT shares have lost nearly 40% over the past 12 months, including move on the session
** Co has roughly $5 bln market cap
(Lance Tupper is a Reuters market analyst. The views expressed are his own)
((lance.tupper@tr.com 1-646-279-6380))