The following is an abbreviated version of the apartment owners portion of the 2011 NMHC 50, an annual ranking of the 50 largest U.S. apartment owners and managers published in NREI's April issue. The companies below are ranked according to the number of apartment units in which they had an ownership interest as of Jan. 1, 2011.

  1. Boston Capital

    Boston, MA

    Apartments with Ownership

    Interest: 158,947

  2. Centerline Capital Group

    New York, NY

    Apartments with Ownership

    Interest: 152,600

  3. Boston Financial Investment Management, LP

    Boston, MA

    Apartments with Ownership

    Interest: 145,454

  4. SunAmerica Affordable Housing Partners, Inc.

    Los Angeles, CA

    Apartments with Ownership

    Interest: 141,113

  5. Equity Residential

    Chicago, IL

    Apartments with Ownership

    Interest: 129,604

  6. PNC Tax Credit Capital

    Portland, OR

    Apartments with Ownership

    Interest: 123,462

  7. AIMCO

    Denver, CO

    Apartments with Ownership

    Interest: 110,946

  8. National Equity Fund

    Chicago, IL

    Apartments with Ownership

    Interest: 107,138

  9. Enterprise Community Investment

    Columbia, MD

    Apartments with Ownership

    Interest: 96,195

  10. The Richman Group Affordable Housing Corp.

    Greenwich, CT

    Apartments with Ownership

    Interest: 94,925

  11. Archstone

    Englewood, CO

    Apartments with Ownership

    Interest: 81,613

  12. Alliant Capital

    Woodland Hills, CA

    Apartments with Ownership

    Interest: 65,245

  13. Camden Property Trust

    Houston, TX

    Apartments with Ownership

    Interest: 63,278

  14. Hunt Companies, Inc.

    El Paso, TX

    Apartments with Ownership

    Interest: 62,109

  15. UDR

    Highlands Ranch, CO

    Apartments with Ownership

    Interest: 58,796

  16. Edward Rose & Sons

    Farmington Hills, MI

    Apartments with Ownership

    Interest: 56,025

  17. Pinnacle Family of Companies

    Dallas, TX

    Apartments with Ownership

    Interest: 55,932

  18. AvalonBay Communities

    Arlington, VA

    Apartments with Ownership

    Interest: 52,490

  19. J.P. Morgan Asset Management

    New York, NY

    Apartments with Ownership

    Interest: 52,304

  20. WNC & Associates

    Irvine, CA

    Apartments with Ownership

    Interest: 52,134

  21. Invesco Real Estate

    Dallas, TX

    Apartments with Ownership

    Interest: 50,567

  22. Forest City Residential Group

    Cleveland, OH

    Apartments with Ownership

    Interest: 47,384

  23. Lincoln Property Co.

    Dallas, TX

    Apartments with Ownership

    Interest: 46,507

  24. MAA

    Memphis, TN

    Apartments with Ownership

    Interest: 46,306

  25. JRK Property Holdings, Inc.

    Los Angeles, CA

    Apartments with Ownership

    Interest: 43,900