Twitter’s Walnut Street offices on the market

BOULDER — About six years after Twitter Inc. (NYSE: TWTR) moved workers into new office space in The Wencel Building at 1301 Walnut St. in downtown Boulder, that real estate is now being marketed again, suggesting that the social media giant has vacated.

Within the three-floor building owned by WWR Real Estate Services LLC, 36,748 square feet is available for lease, according to a marketing brochure from commercial real estate firm Cresa.

Cresa broker Chad Kollar and representatives from Twitter declined to comment. 

Twitter gained a Boulder presence in early 2014 with its acquisition of Gnip and doubled its headcount to around…