In the following year she finished fourth in the 1000 Guineas and won the Haverhill Stakes before beating a strong field to take the Epsom Oaks in a race record time which stood for more than half a century.

Beam was a daughter of Mistrella (foaled 1907), a British broodmare whose other descendants included Light Brocade, Lady Capulet and the Ascot Gold Cup winners Foxhunter and Trimdon.

[3] As a two-year-old in 1926, Beam ran four times and recorded her only success on her final appearance when she won the Houghton Stakes at Newmarket Racecourse winning by a short head from Cartona.

In the spring of 1927 of Beam ran in the 1000 Guineas over the Rowley Mile at Newmarket and finished fourth of the twenty-eight runners behind Cresta Run, Book Law and Endowment.

She rallied in the closing stages to regain the advantage and won a "terrific race"[2] by a head from Book Law with a gap of six lengths back to Grande Vitesse in third place.