More than half the students who were investigated by the school's administrative board have been required to withdraw from the college for a period of time, Boston.com reported.
Of the remaining cases, around half received disciplinary probation, and the rest were dismissed, according to the news website.
Harvard's Dean of Faculty of Arts and Sciences informed members of the school community about the results of the board's investigations in a campus-wide email.
School officials said in August that they had discovered suspicious similarities while reading through students' year-end take-home exams over the summer. The cases were heard by the school's administrative board and decided throughout the fall and winter, Boston.com reported.
All of the students involved in the incident were in the same 279-person undergraduate course, Government 1310: "Introduction to Congress."