Power company NRG Energy inked the largest lease north of Market Street this year, taking 51,530 square feet at 100 California St,, landlord Pembrooke Real Estate said Monday. In San Francisco overall, the lease is the ninth-largest in San Francisco this year - far behind six-figure leases inked in the South Financial District and South of Market by Uber, Docusign and Lending Club, according to data compiled by Cushman & Wakefield.