[2] The school was founded in 1923 by brothers Bill and Percy Rees and has been situated in the east Llanelli village of Bryn since 1928.

Upon retirement of the Rees' brothers, former head boy Mr Vaughan-Evans was appointed Headmaster in 1962.

[5] The deal for St Michael's, along with Bosworth Independent College, specifically cost the company a sum of £38m.

[9] In 2012 the school appeared in national headlines after accusations arose that education officers at Cognita UK, a rival education company, had posed as parents at St Michael's in order to obtain commercial information.

Cognita at the time operated nearby Ffynone House School in Swansea but denied all of the allegations.