ABSTRACT: The intention of this article is to analyze the Quota Law (Law 12.711/12) and other affirmative actions implemented by Colégio Pedro II (CPII) and their contributions to the expansion of educational opportunities. We seek to answer two main questions: what affirmative actions were adopted in their admission selection processes over time? And, what changes are perceived in the sociodemographic profile of entrants, especially since the Quota Law? The study is exploratory and documentary, with descriptive analyses based on secondary data obtained from the CPII website and microdata from the School Census. We used as reference three cohorts of entrants in the 6th grade of Elementary School and the 1st grade of regular and integrated High School, in the years 2012, 2014, and 2016. The main results show that since 2005, CPII has adopted an affirmative action policy for student admission with a reservation of 50% of the spots for public school graduates. Starting in 2013, the Quota Law was implemented in both the integrated and regular High School, adding to the existing public school criteria, income criteria, race/color, and disability criteria. The analysis of the students' socio-demographic profile reinforces the contribution of CPII's affirmative action policies and the Quota Law in expanding access opportunities, especially for Black/Brown students.