Is Big Tech here to stay? Venture capital firms Founders Fund and Atomic and e-commerce company OpenStore signed leases for more than 22,000 square feet in Wynwood. Silicon Valley’s Founders Fund, which took a temporary space in Brickell earlier this year, is leasing the eighth floor at Wynwood Annex, a Class A office building in the trendy Miami neighborhood, Atomic signed a lease for the entire seventh floor and part of the fourth floor, and OpenStore is taking the larger portion of the fourth floor, Arellano said.