The Bike 400 Cycle Challenge saw around 660 M&S employees covering 60,000 miles as part of a 24-hour endurance event.
Logistik’s event team coordinated the day, which took place at the Prodrive Race Track in Kenilworth, Warwickshire and was inspired by the Le Mans 24 hour endurance event.
The event company's organisation included feeding the 150 teams taking part and providing a tent campsite and treatment areas.
Each rider pedalled for six hours, covering 100 miles around the track. In total the teams will clock up enough miles to travel nearly two and half times around the earth.
In addition to the teams, four M&S cycling enthusiasts competed for the whole 24 hour challenge as solo cyclists, covering 900 miles.
More than £544,000 has been raised to date in support of Breakthrough Breast Cancer (GB), Action Cancer (NI) and the Marie Keating Foundation (ROI) – with two months of fundraising still to go.
James Wilkins, joint managing director of Logistik said: "We’re very proud to support M&S on such an important and ambitious charity challenge. It was fantastic to see so many people getting involved. There was great enthusiasm and excitement surrounding the event."