Sir Robertson Huntly Stewart CBE (21 September 1913 – 13 August 2007) was a New Zealand industrialist and exporter.

[3] He started to work for Plastic & Die Casting Ltd in 1947,[3] a company founded ten years earlier.

The company was listed on the New Zealand Stock Exchange in 1971 and at its height, employed 2,200 staff with an annual turnover of NZ$350 million.

[3] The 60% family shareholding in PDL was sold in 2001 to the French company Schneider Electric for NZ$97 million.

[2] Due to his lack of formal education, the recognition that he was most proud of was his honorary doctorate of engineering from the University of Canterbury.

[2] In the 1960s, Stewart offered to fund the erection of a fountain on a small public reserve on the corner of Colombo, High, and Hereford Streets.

This was built in the early 1970s, Stewart finally putting up NZ$14,000, his first philanthropic contribution to Christchurch.

[17] In 1970, he married his secretary, Melbourne-born Ellen Adrienne Cansdale (who was made a Dame Companion of the New Zealand Order of Merit in the 2015 New Year Honours).