Series I. Bronfman Family contains two subseries.

Subseries A. Research Materials for Samuel Bronfman: The Life and Times of Seagram's Mr. Sam by Michael Marrus; The core of these records was created by John Scott, who was hired by the family to write a biography of their patriarch Samuel Bronfman. The remaining records in this subseries were created by Marrus when researching Samuel Bronfman: The Life and Times of Seagram's Mr. Sam.

Subseries B. Bronfman Family Papers; contains documents such as births, deaths, and marriages of some of the Bronfman family and relatives; correspondence, and newspaper clippings.

The Bronfman family subseries consists of images of Seagram company owner Samuel Bronfman, his wife Saiyde, their children, Minda de Gunzberg, Phyllis Lambert, Edgar Bronfman, Sr. and Charles Rosner Bronfman. Samuel Bronfman’s brothers Harry and Abe, and Abe’s son Allan are also pictured. The majority of the photographs are of Samuel Bronfman and Charles Rosner Bronfman and date from 1900 to 1982. There are many individual portraits, events, trips, and albums of birthday parties.

This series is comprised of the following six subseries:

Subseries A. Correspondence, 1974-1980

This subseries contains the chronological file of Bronfman's correspondence. Subjects include Seagram business, CEMP (an acronym for Charles, Edgar, Minda, Phyllis), the Expos, philanthropy, and personal matters.

Subseries B. Acquisitions and Investments, 1958-1983

Correspondence, memoranda, annual and financial reports and other materials regarding Seagram and CEMP financial interests.

Subseries C. Business Records, 1957-1996, bulk 1957-1983

This subseries contains correspondence, clippings, articles, and reports covering a wide range of issues and activities relevant to the company's operation. There are also transcripts of several speeches delivered by Bronfman. Noteworthy files include those regarding the company's participation in Expo '67 and the Seagram Building file, which contains correspondence and clippings about the building including efforts to get the structure designated as a historic landmark.

Subseries D. Bronfman Family, 1949, 1966-1979

These documents include correspondence, clippings and articles about the Bronfman family and their activities. Included is documentation of the 1975 kidnapping of Samuel Bronfman II, eldest son of Edgar Bronfman. Photographs from this subseries were transferred to Hagley's Pictorial Department.

Subseries E. Philanthropy and Jewish Affairs, 1958-1983, bulk 1973-1983

These records describe company and Bronfman family philanthropy and involvement in Jewish affairs.

Subseries F. Montreal Expos and Baseball, 1968-1982

This subseries contains correspondence, clippings and articles, and agreements on a wide range of issues pertaining to the Expos and professional baseball. The greatest concentration of records is in regard to securing the franchise and constructing a stadium.