The following is an abbreviated version of the apartment management portion of the 2009 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 they managed as of Jan. 1, 2009.

1. Pinnacle

   Seattle, WA
   Apartments Managed: 185,219

2. Riverstone Residential, A CAS Partners Co.

   Dallas, TX
   Apartments Managed: 181,928

3. AIMCO

   Denver, CO
   Apartments Managed: 154,987

4. Equity Residential

   Chicago, IL
   Apartments Managed: 148,115

5. Greystar Real Estate Partners

   Houston, TX
   Apartments Managed: 140,000

6. Lincoln Property Co.

   Dallas, TX
   Apartments Managed: 130,265

7. Archstone

   Headquarters:
   Englewood, CO
   Apartments Managed: 83,871

8. WinnCompanies

   Boston, MA
   Apartments Managed: 75,353

9. Camden Property Trust

   Houston, TX
   Apartments Managed: 62,641

10. Bell Partners

    Greensboro, NC
    Apartments Managed: 61,663

11. Fairfield Residential

    San Diego, CA
    Apartments Managed: 60,265

12. FPI Management

    Folsom, CA
    Apartments Managed: 53,671

13. Edward Rose & Sons

    Farmington Hills, MI
    Apartments Managed: 52,794

14. AvalonBay Communities

    Alexandria, VA
    Apartments Managed: 49,730

15. Alliance Residential Co.

    Phoenix, AZ
    Apartments Managed: 49,600

16. UDR

    Highlands Ranch, CO
    Apartments Managed: 47,652

17. Picerne Real Estate Group

    Phoenix, AZ
    Apartments Managed: 44,754

18. The ConAm Group of Co.s

    San Diego, CA
    Apartments Managed: 43,500

19. Westdale Real Estate Investment & Management

    Dallas, TX
    Apartments with Management Interest: 42,915

20. CnC Investments

    Houston, TX
    Apartments Managed: 42,647

21. Mid-America Apartment Communities

    Memphis, TN
    Apartments Managed: 42,554

22. The Michaels Development Co.

    Marlton, NJ
    Apartments Managed: 41,120

23. Capstone Real Estate Services

    Austin, TX
    Apartments Managed: 40,870

24. Empire American Holdings

    Montvale, NJ
    Apartments Managed: 40,776

25. Home Properties

    Rochester, NY
    Apartments Managed: 38,280