Dome's 20% tender offer for Conoco unintentionally began a takeover battle among several larger companies.

[1] Dome grew by making acquisitions in the energy industry, notably the 1981 acquisition of a 52.9% interest of Hudson's Bay Oil and Gas Company (HBOGC) through its wholly owned subsidiary, Dome Energy Limited.

Dome was active mainly in Western Canada, the Beaufort Sea, and the Arctic islands.

The company developed serious problems as a result of the 1986 drop in world oil prices and substantial debts from past takeovers.

In November 1987, after months of negotiation, an agreement in principle was reached that led to Amoco Canada Petroleum Co Ltd buying Dome for $5.5 billion.