The for-profit education management industry has, based on the available data, entered a period of relative stability. The industry's actual condition, however, is more difficult to determine than ever. This is because companies that dominate the industry are privately held and do not have to provide information to the public that they choose not to share. As a result a large portion of the Education Management Organization (EMO) industry is not subject to independent scrutiny of either financial results or academic performance. An examination of enrollment patterns reported by large-size education management companies--those that run 10 or more schools--finds that the charter schools they manage typically have larger enrollments than the U.S. charter school average. This pattern is most prevalent among primary schools where large-size EMOs enroll the bulk of their students. These findings suggest a business model that relies on primary education and volume for profits. The "Profiles of For-Profit Education Management Organizations: 2006-2007" is the ninth annual "Profiles" report. Profiled EMOs are categorized into three size categories: small (those operating three or fewer schools); medium (those operating four to nine schools); and large (those operating ten or more schools). The "2006-2007 Profiles' report identifies a total of 23 companies categorized as large- or medium-size, the same number as identified in the 2005-2006 Profiles. EMOs now operate in 31 states, up two from last year, however. In 2006-2007, large- and medium-size EMOs managed a total of 457[superscript 2] schools, down from 480 in the "2005-2006 Profiles". Edison Schools lost the greatest net number of school contracts (four) among large- and medium-size EMOs. Seven appendices are included: (1) Reader's Guide; (2) Special Notes on Company Profiles; (3) No Longer Profiled Companies; (4) Methods; (5) National Average Enrollments; (6) District Comparison; and (7) Small Companies. (Contains 7 tables.) [For "Profiles of For-Profit Education Management Organizations: Eighth Annual Report, 2005-2006", see ED508524.]