EXHIBIT 10.5.6 FIRST AMENDMENT TO STANDARD OFFICE LEASE (600 CORPORATE POINTE, SUITE 1200) THIS FIRST AMENDMENT TO STANDARD OFFICE LEASE ("FIRST AMENDMENT") is made and entered into as of the 1st day of April, 2000, by and between ARDEN REALTY FINANCE...Standard Office Lease • March 29th, 2001 • Investment Technology Group Inc • Security brokers, dealers & flotation companies
