* Meanwhile, official data showed the country's factory activity grew at the slowest pace in four months in June as material shortages persisted and inflation pressures rose. * The largest percentage gainers on the TSX were uranium company Nexgen Energy Ltd , which jumped 4.7%, and Mullen Group Ltd that rose 4.3% after the freight transportation provider announced the acquisition of R.S. Harris Transport Ltd. * Capstone Mining Corp fell 2.2%, the most on the TSX, and the second biggest decliner was pot producer Aurora Cannabis Inc , down 1.8%.