Ballantine and Gardiner was a Scottish manufacturer of stained-glass windows, one of several names the company worked under.

In 1843, they won a competition to design windows for the new Houses of Parliament, although it was subsequently changed to that of the House of Lords.

Alexander's son, James Ballantine III, also joined in 1905, a year before his father's death.

[1] Some of the firm's work was signed with the alternative spelling of Ballantyne.

[1] The company installed the windows of the following buildings: