A new malthouse was built and weekly production had increased to more than 500 hogsheads, with the brewery employing a 30 members of staff.

[6] In 1924, James Boag III retired temporarily from the company, and returned in 1930 as Managing Director, a position he held until his death in 1944.

His obituary in the Examiner reported: "Having been closely connected with business and sporting activities, Mr Boag was known and respected by a wide circle of friends.

In 2000, San Miguel Corporation acquired J. Boag & Son (previously a publicly listed company) for $92 million.

In 2004, Boag's Brewery was expanded to occupy the complete block enclosed by William, Tamar and Shield Streets and The Esplanade.