Hundreds of volunteers help care for open space on Irvine Ranch More than 300 volunteers with the Irvine Ranch Conservancy spend 15,000 hours annually tending to the permanently preserved land. RELATED PRESS WeWork leases two floors at 400 Spectrum Center Drive Irvine Company names Maggie Brophy as Senior Leasing Manager for its prestigious Chicago portfolio Irvine Company acquires One Del Mar in Del Mar Heights Irvine Company leases 242,000 square feet at Pathline Park in Sunnyvale to leading cybersecurity firm Proofpoint Womble Bond Dickinson relocating to 400 Spectrum Center Drive