The Aluminum Company of Canada Ltd. was founded in June 1902 by Arthur V. Davis in Shawinigan Falls, Quebec as a subsidiary of the Pittsburgh Reduction Company. Its industry was mining and aluminum and its headquarters were in Toronto, Ontario (1902-1939) and Montreal, Quebec (1939-present). It split apart from ALCOA in 1928 and became a subsidiary of Aluminum Ltd., a newly-formed holding company. This firm changed its name to Alcan Aluminum Ltd. in 1966. In 1987, Alcan Aluminum merged its principal subsidiary. In 1994, the firm sold its building products business to the Genstar Capital Corporation. In 2000, the company acquired Algroup AG and merged with it a year later. Alcan was acquired by Rio Tinto in 2007 and reorganized as Rio Tinto Alcan.

Amako Construction Ltd. is a construction company based in North Vancouver.

Ambassador Development Corporation Of Canada Ltd. (ADCC) was incorporated on Thursday December 16, 1974 in Vancouver as a real estate development company. They had plans to develop "a whole new community" in what is now the White Gold residential neighbourhood in Whistler, however their development never came to fruition, and it is unclear why. The White Gold Estates planned by the ADCC originally envisioned a neighbourhood including large cabin lots, condominiums, a shopping area, and a hotel complex spread over 172 acres [70 hectares]. The developers claimed that they would keep a large portion of the natural setting intact, “retaining as much of the park-like landscape as possible.”

American Friends of Whistler (AFOW) was an American charitable organization set up to enhance the Whistler community and foster greater understanding and friendship between Canadians and Americans, raising and distributing funds for health and human services, culture and the arts, and the environment and outdoor recreation in the Whistler community. Founded in July 2002 by a small group of Americans who spend time in Whistler as second home-owners, the group has donated millions of dollars to local Whistler non-profit organizations registered as a non-profit charity in Washington State. In 2019, the board made the decision to cease operations due to trouble being an all-volunteer organization keeping administrative costs under 3%. Former members decided to continue to be active in supporting the Whistler community through charitable giving as individuals, and maintain the AFOW website as a way to facilitate the continuing of charitable giving for the Whistler area.

The Anglo-Canadian Logging Company was a logging company incorporated in 1933, with claims along the Pacific Great Eastern railway corridor.

The Ancient Order of Froth-Blowers was a humorous British charitable organisation "to foster the noble Art and gentle and healthy Pastime of froth blowing amongst Gentlemen of-leisure and ex-Soldiers". Though the organization peaked in the 1920s and 1930s, it has been briefly revived intermittently since then.

Anthill Films is a film production company based in Squamish, BC known for producing films in adrenaline sports and for brands related to adrenaline sports. It is comprised of a specialized group of filmmakers who work to gather stories and capture video from the furthest reaches of the planet. Staff include Darcy Wittenberg, Darren McCullough, Colin Jones, Ian Dunn, Scott Jewett, Fraser Newton, Matt Butterworth, Courtney Cairns, Vince Shuley, Sterling Lorence, Haruki Noguchi, Paul Harrison, Jo Osborne, Adam Foley, and Monique Joyce. Some of their most popular films are the mountain biking films 'UnReal', 'Not Bad', 'Not2Bad', and the Collective Anthology.

Real Estate developer from Burnaby led by Jim Bosa specializing in high rise condominium construction in Vancouver, Whistler, and Vancouver Island.

The Archives Association of British Columbia represents individual and institutional members, maintains resources for the public and the archival community, and advocate for Archives in the province.

Founded in 1960 by professional golfer, Arnold Palmer, Arnold Palmer Enterprises Inc. is a design company that focuses on building and remolding golf courses. It is headquartered in Cleveland, Ohio.