The closure of a $300million fundraise for Cambridge-based quantum computing company Quantinuum is a triumph for the Hills Road company and for Honeywell, which remains the company’s majority shareholder. The new equity values Quantinuum, which is developing fault-tolerant quantum computing and quantum software development, at $5billion, and brings the total capital raised by Quantinuum since its inception to $625m. It is also Quantinuum’s first equity funding round since Cambridge Quantum Computing \- founded in 2014 – and Honeywell Quantum Solutions merged in November 2021. Though Quantinuum…