Sir Percy Malcolm Stewart, 1st Baronet (9 May 1872 – 27 February 1951), was an English industrialist and philanthropist.

He was born at St Leonards, Sussex, the sixth of eight children of Halley Stewart and his wife Jane Elizabeth Atkinson.

[1] After a first job in lightering on the River Thames from about 1891, Stewart entered his father's business, and became a junior partner in 1895.

He became chairman of the board of the Associated Portland Cement Manufacturers Ltd (APCM) in 1924 and remained in that position until 1945 when he became company president.

As a special commissioner appointed by Ramsay MacDonald's coalition government of 1934, he helped devise schemes to reduce unemployment.