677 Washington Blvd., Stamford. Image courtesy of Google Maps.

Fairfield County office vacancies rose slightly to 26.8 percent in the second quarter, with a big lease by WWE in Stamford offset by a developer’s repositioning of the Matrix Corporate Center in Danbury.

The largest transaction of the second quarter was professional wrestling organization WWE’s consolidation of its headquarters at 677 Washington Blvd. in downtown Stamford. The 415,000-square-foot lease accounted for more than a third of the county’s leasing activity during the quarter, Cushman & Wakefield reported.

The vacancy rate represents a 2.3 percent increase over the past 12 months.

The largest single vacancy is in Danbury, where Summit Development is repositioning the former Matrix Corporate Center at 39 Old Ridgebury Road as The Summit. Southport-based Summit Development acquired the 1.2-million-square-foot office complex previously known as the Matrix Center last October for $17 million and is rebranding and repositioning it as a mixed-use property with a multitenant leasing strategy.

The Greater Danbury submarket registered the largest 12-month drop in asking rents, which fell $5.55 per square foot to $19.20. Greenwich rents led the county, rising $0.87 per square foot to $52.58. Countywide rents decreased $0.88 per square foot to $31.59.