AUSTIN-Cousins Properties Inc.'s Congress at Fourth building has hauled in its fifth tenant, hiking pre-opening occupancy to 34%. And the tenant, Dewey Ballantine, a New York City-based law firm, hikes its Austin profile to the top two floors of what will be the city's tallest building.

Dewey Ballantine, which opened an Austin office in 2002, will take 35,000 sf on the building's 32nd and 33rd stories for 10 years, according to Tim Hendricks, senior vice president of development at Cousins. He declined to reveal the building's asking rents.

The firm will join three other law firms and an engineering company in the 525,000-sf tower. Last week, Cousins announced a 15-year lease with the Winstead, Sechrest & Minick law firm for 48,000 sf, the biggest in the building so far.