0001116679-07-001936 424B7 1 20070725 20070725 ACADIA REALTY TRUST 0000899629 6798 232715194 MD 1231 424B7 33 333-139950 07999147 20 SOUNDVIEW MARKETPLACE PO BOX 1679 PORT WASHINGTON NY 11050 5167678830 600 THIRD AVE PO BOX 1679 KINGSTON PA 18704 MARK CENTERS TRUST 19930329 424B7 1 acad424b7.htm PROSPECTUS SUPPLEMENT NO. 3