The following is an abbreviated version of the apartment owners portion of the 2010 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, 2010.

1. Boston Capital
   Boston, MA
   Apartments with Ownership
   Interest: 162,677

2. SunAmerica Affordable Housing Partners
   Los Angeles, CA
   Apartments with Ownership
   Interest: 147,087

3. Equity Residential
   Chicago, IL
   Apartments with Ownership
   Interest: 136,843

4. AIMCO
   Denver, CO
   Apartments with Ownership
   Interest: 133,200

5. PNC Tax Credit Capital
   Portland, OR
   Apartments with Ownership
   Interest: 128,727

6. National Equity Fund
   Chicago, IL
   Apartments with Ownership
   Interest: 101,226

7. Enterprise Community Investment
   Columbia, MD
   Apartments with Ownership
   Interest: 96,395

8. The Richman Group Affordable Housing Corp.
   Greenwich, CT
   Apartments with Ownership
   Interest: 90,346

9. Archstone
   Englewood, CO
   Apartments with Ownership
   Interest: 83,085

10. Pinnacle
    Seattle, WA
    Apartments with Ownership
    Interest: 68,017

11. Camden Property Trust
    Houston, TX
    Apartments with Ownership
    Interest: 63,286

12. Alliant Capital
    Woodland Hills, CA
    Apartments with Ownership
    Interest: 60,258

13. Edward Rose & Sons
    Farmington Hills, MI
    Apartments with Ownership
    Interest: 55,925

14. BlackRock Realty
    San Francisco, CA
    Apartments with Ownership
    Interest: 55,144

15. UDR
    Highlands Ranch, CO
    Apartments with Ownership
    Interest: 51,509

16. Fairfield Residential
    San Diego, CA
    Apartments with Ownership
    Interest: 51,196

17. WNC & Associates
    Irvine, CA
    Apartments with Ownership
    Interest: 50,332

18. AvalonBay Communities
    Alexandria, VA
    Apartments with Ownership
    Interest: 48,924

19. Forest City Residential Group
    Cleveland, OH
    Apartments with Ownership
    Interest: 47,633

20. Invesco Real Estate
    Dallas, TX
    Apartments with Ownership
    Interest: 47,340

21. Lincoln Property Co.
    Dallas, TX
    Apartments with Ownership
    Interest: 46,347

22. Michaels Development Co.
    Marlton, NJ
    Apartments with Ownership
    Interest: 44,916

23. Raymond James Tax Credit Funds, Inc.
    St. Petersburg, FL
    Apartments with Ownership
    Interest: 43,945

24. Mid-America Apartment Communities
    Memphis, TN
    Apartments with Ownership
    Interest: 43,604

25. Bell Partners, Inc.
    Greensboro, NC
    Apartments with Ownership
    Interest: 43,160