The donation will help the cancer charity to continue providing a range of physical, emotional and financial support for people living with cancer across the UK.
Noel Collett, chief operating officer at SSP UK and Ireland said: “We want to thank all of our teams who have gone above and beyond to raise money for Macmillan in the past four years to reach this amazing milestone.
“We believe that together we can make a difference and are extremely proud to have partnered with a charity that provides such critical support for those living with cancer, and is so near and dear to everyone’s hearts in the UK.”
SSP teams have committed to raising money through a number of fundraising activities, including ‘Go Green’ days, 'around the world' virtual globetrotting challenges, bake-off competitions, sponsored bike rides and marathons.
Becky Ettinger, head of corporate partnerships at Macmillan Cancer Support, added: "There are three million people living with cancer in the UK and one in two of us is likely to receive a cancer diagnosis in our lifetime. With significant pressures across the NHS and the cost-of-living crisis causing ongoing worry, there has never been a more important time to support people living with cancer.
“We are truly grateful to colleagues across SSP for their incredible fundraising efforts which have generated a phenomenal amount and will help to ensure Macmillan can continue to be there for people living with cancer, when they need us most.”