Here's what made the 43-story tall drink of water so attractive to so many tenants, including two that just snapped up the last space available.

This month we reported on Wish's mega 54k SF lease inked at One Sansome, and now we've learned there's no more room in the 587k SF building. Landlord Barker Pacific Group (BPG) has the tower fully leased after signing two more leases, managing director Michael Barker (here on a hike in Southern Utah) exclusively tells us. Sotheby’s has leased 2,540 SF on the sixth floor and Capsilon Technologies leased about 5,600 SF on the seventh floor. Michael says the building embodies what the new S.F. represents: a meld of innovative tech companies and established long-standing powerhouses. CBRE reps the landlord and had a stellar 2014, filling up the building fast. Wish will occupy this spring, he says.

When Citibank downsized at One Sansome, he dumped millions inside and renovated floor by floor (leases and renewals followed). Wish will also occupy the penthouses that have sat empty for 20 years, so Michael plans to install two new elevators for access. Wish will get some of the "most dramatic space" in S.F. (check out the view, above), he says. Two months ago, One Sansome was the first major building in the US to get LEED Version 4 Platinum status. He's not stopping there and is in the process of modernizing its building management systems even more.

Michael is no stranger to filling big holes left behind. When Disney shut down at Barker Pacific's Novato campus four years ago, he lured in an assortment of new tech tenants craving Hamilton Landing's creative layout. He gave us an update on the project: He still has "a ways to go there" before the 403k SF campus is full, but says the site managed to capture strong absorption in Marin County last year.