The following is an abbreviated version of the apartment management 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 they managed as of Jan. 1, 2011.

1. Greystar Real Estate Partners, LLC

   Apartments Managed: 187,360

   Charleston, SC

   Corporate Officer: Robert A. Faith

2. Riverstone Residential Group

   Apartments Managed: 162,182

   Dallas, TX

   Corporate Officer: Walt Smith

3. Pinnacle Family of Companies

   Dallas, TX

   Apartments Managed: 151,367

   Corporate Officer: Stan Harrelson

4. Lincoln Property Co.

   Dallas, TX

   Apartments Managed: 133,425

   Corporate Officer: Tim Byrne

5. Equity Residential

   Chicago, IL

   Apartments Managed: 129,604

   Corporate Officer: David J. Neithercut

6. AIMCO

   Denver, CO

   Apartments Managed: 117,119

   Corporate Officer: Terry Considine

7. WinnCompanies

   Apartments Managed: 84,817

   Boston, MA

   Corporate Officer: Samuel Ross

8. Archstone

   Apartments Managed: 81,613

   Englewood, CO

   Corporate Officer: R. Scot Sellers

9. Camden Property Trust

   Apartments Managed: 63,498

   Houston, TX

   Corporate Officer: Richard J. Campo

10. Bell Partners

    Apartments Managed: 60,182

    Greensboro, NC

    Corporate Officers: Steven D. Bell and Jonathan D. Bell

11. FPI Management

    Apartments Managed: 58,604

    Folsom, CA

    Corporate Officer: Dennis Treadaway

12. UDR

    Apartments Managed: 58,340

    Highlands Ranch, CO

    Corporate Officer: Thomas W. Toomey

13. Edward Rose & Sons

    Apartments Managed: 56,025

    Farmington Hills, MI

    Corporate Officer: Warren Rose

14. AvalonBay Communities

    Apartments Managed: 52,490

    Alexandria, VA

    Corporate Officer: Bryce Blair

15. Alliance Residential Co.

    Apartments Managed: 48,520

    Phoenix, AZ

    Corporate Officer: Bruce Ward

16. The ConAm Group of Cos.

    Apartments Managed: 47,400

    San Diego, CA

    Corporate Officer: Brad Forrester

17. Fairfield Residential

    Apartments Managed: 46,851

    San Diego, CA

    Corporate Officer: Chris Hashioka

18. MAA

    Apartments Managed: 46,306

    Memphis, TN

    Corporate Officer: H. Eric Bolton, Jr.

19. Milestone Management LP

    Apartments Managed: 45,896

    Dallas, TX

    Corporate Officer: Steve Lamberti

20. Westdale Real Estate Investment & Management

    Apartments Managed: 44,765

    Dallas, TX

    Corporate Officer: Joseph G. Beard

21. Picerne Real Estate Group

    Apartments Managed: 44,588

    Phoenix, AZ

    Corporate Officer: David R. Picerne

22. JRK Property Holdings, Inc.

    Apartments Managed: 41,900

    Los Angeles, CA

    Corporate Officer: Jim Lippman

23. BH Management Services

    Apartments Managed: 41,641

    Des Moines, IA

    Corporate Officer: Nicholas H. Roby

24. The Laramar Group, LLC

    Apartments Managed: 40,521

    Denver, CO

    Corporate Officer: David B. Woodward

25. Village Green

    Apartments Managed: 40,000

    Detroit, MI

    Corporate Officer: Jonathan Holtzman