UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Notice of Effectiveness
Effectiveness Date: November 21, 2011 4:00 P.M.
Form: S-4
CIK: 0000922864
Company Name: APARTMENT INVESTMENT & MANAGEMENT CO
File Number: 333-175848
CIK: 0000926660
Company Name: AIMCO PROPERTIES LP
File Number: 333-175848-01