The acquisition, the company's first for three years, brings its estate up to 10 pubs.
The Y Giler Arms was bought for an undisclosed sum through agents Robert Barry and Co. The pub has seven letting bedrooms and is set in six acres alongside the River Merddwr. The pub is also listed as a Camping and Caravanning Club approved site.
Mat Batham, the company's estate director, said: "We have built up a fund to buy more pubs and have been actively looking for four or five more.
"We have made no secret of the fact that we are looking for more pubs and will continue to explore possibilities in the Cotswolds, Somerset, North Devon and also Derbyshire, in fact anywhere within two hours of our base".