William David Mulholland Jr. (June 16, 1926 – September 8, 2007) was an American banker who served as president, chairman, and chief executive officer of the Bank of Montreal.

Whilst a partner at Morgan Stanley in the 1960s, he arranged the financing for the construction of the Churchill Falls Generating Station by the British Newfoundland Corporation (Brinco).

Beginning in 1958, Mulholland had worked with the British Newfoundland Corporation (Brinco), and was involved in the financing of the Twin Falls Generating Station.

Mulholland was principally responsible for Brinco's issue of USD 500 million in bonds to finance the construction of the Churchill Falls Generating Station.

[1] On November 11, 1969, Brinco's de Havilland DH-125 crashed while attempting to land in Labrador City, killing six of the company's executives, including president Donald J. McParland and vice-president of finance Eric G.

[2][3] Due to his close association with the company over the preceding decade, in December 1969 Brinco's board appointed Mulholland as president, effective January 1, 1970.

In November 1974, Mulholland was appointed by the Bank of Montreal as its new president, succeeding Frederick Harold McNeil, who became deputy chairman and chief executive officer.

[5] In his first years as president, he oversaw the creation of a multi-branch banking system, the introduction of daily interest savings accounts, and the transition from print to digital ledgers.

A funeral mass was held on September 12 at Holy Cross Church in Georgetown, and he was interred in the United States with full military honors.