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