1992: Workplace stores based in Lakeland, Florida
1994: National Office Products based in Hackensack, New Jersey
1994: Spectrum Office Products based in Rochester, New York
1994: MacIsaac Office Products based in Canton, Massachusetts
1994: Philadelphia Stationers based in Philadelphia, Pennsylvania
1996: Staples Office Products based in Texas
1998: Quill Corporation, the largest mail order office supply retailer in the United States.
Headquartered in Lincolnshire, Illinois, Quill offers products including school and office supplies, office machines, furniture, technology, cleaning and break room, as well as custom-printed and promotional products.

2002: Medical Arts Press, a United States supplier of front office and exam-room products for healthcare facilities.

2004: United Kingdom-based chain Office World, owned by Globus Group.

2006: Chiswick, distributes industrial and retail packaging, shipping and warehouse products to thousands of small and mid–sized manufacturers, distributors and retailers throughout the United States and Canada.
The company offers over 7,500 industrial and retail packaging and shipping products, and their product line includes a wide variety of polyethylene bags, corrugated boxes, tape, labels, protective packaging, mailers, retail shopping bags and related packaging supplies.
Sales channels include Catalog/Direct Mail, the Internet and Outside Sales.
It is now branded as  Staples Industrial.

2007: Thrive Networks, an IT services company that provides IT support to small and mid–level businesses.

2007: American Identity, one of the largest global distributors of corporate branded merchandise.
American Identity has since been re-branded as Staples Promotional Products.

2008: Corporate Express, a Dutch company that supplies office products to businesses and institutions.
The firm was known as Buhrmann prior to April 20, 2007, when it changed its trading name to that of its best known brand, taken from the United States-based corporation it acquired in 1999.
The company was acquired by Staples Inc. in August 2008, and has been integrated into the Staples Advantage brand.

2010: Miami Systems, a commercial printing company based in Cincinnati OH with 250 employees.

2014: PNI Digital Media, a Canadian software maker that powers in-store kiosks for printing photographs, calendars and wedding invitations.
Staples spent $67.3 million in an all-cash deal for this acquisition.

2016: Staples divested its Australian and New Zealand branches as part of a strategic shift to focus on its US-based retail store format.
The company's Australian and New Zealand businesses were rebranded as Winc.
In May 2016, a proposed $6.3 billion merger between Staples and key rival Office Depot was successfully blocked by the Federal Trade Commission.

2018: HiTouch Business Services, offering office supplies, workspace design services and IT solutions.

2019: Essendant, a national wholesale distributor of office supplies, and DEX Imaging, an independent document imaging technology dealer in the United States.
1992: Workplace stores based in Lakeland, Florida
1994: National Office Products based in Hackensack, New Jersey
1994: Spectrum Office Products based in Rochester, New York
1994: MacIsaac Office Products based in Canton, Massachusetts
1994: Philadelphia Stationers based in Philadelphia, Pennsylvania
1996: Staples Office Products based in Texas
1998: Quill Corporation, the largest mail order office supply retailer in the United States. Headquartered in Lincolnshire, Illinois, Quill offers products including school and office supplies, office machines, furniture, technology, cleaning and break room, as well as custom-printed and promotional products.
2002: Medical Arts Press, a United States supplier of front office and exam-room products for healthcare facilities.
2004: United Kingdom-based chain Office World, owned by Globus Group.
2006: Chiswick, distributes industrial and retail packaging, shipping and warehouse products to thousands of small and mid–sized manufacturers, distributors and retailers throughout the United States and Canada. The company offers over 7,500 industrial and retail packaging and shipping products, and their product line includes a wide variety of polyethylene bags, corrugated boxes, tape, labels, protective packaging, mailers, retail shopping bags and related packaging supplies. Sales channels include Catalog/Direct Mail, the Internet and Outside Sales. It is now branded as  Staples Industrial.
2007: Thrive Networks, an IT services company that provides IT support to small and mid–level businesses.
2007: American Identity, one of the largest global distributors of corporate branded merchandise. American Identity has since been re-branded as Staples Promotional Products.
2008: Corporate Express, a Dutch company that supplies office products to businesses and institutions. The firm was known as Buhrmann prior to April 20, 2007, when it changed its trading name to that of its best known brand, taken from the United States-based corporation it acquired in 1999. The company was acquired by Staples Inc. in August 2008, and has been integrated into the Staples Advantage brand.
2010: Miami Systems, a commercial printing company based in Cincinnati OH with 250 employees.
2014: PNI Digital Media, a Canadian software maker that powers in-store kiosks for printing photographs, calendars and wedding invitations. Staples spent $67.3 million in an all-cash deal for this acquisition.
2016: Staples divested its Australian and New Zealand branches as part of a strategic shift to focus on its US-based retail store format. The company's Australian and New Zealand businesses were rebranded as Winc. In May 2016, a proposed $6.3 billion merger between Staples and key rival Office Depot was successfully blocked by the Federal Trade Commission.
2018: HiTouch Business Services, offering office supplies, workspace design services and IT solutions.
2019: Essendant, a national wholesale distributor of office supplies, and DEX Imaging, an independent document imaging technology dealer in the United States.
Staples Inc.