The contract win will see AOK Events manage a range of events for the banking giant, including traditional and bespoke corporate hospitality events and golf days, as well as regional hospitality and sponsorship events.
AOK CEO Alex Hewitt said: "We are delighted to be working with Santander UK and look forward to delivering its programme."
Hewitt added that this is a significant new business win for the agency, which has not worked with Santander in the past.
"This is the fifth major account win this year with two more in the pipeline," he said. "We’re looking at a record-breaking year and I think the industry as a whole is hugely optimistic."
This follows on from a positive second half of 2013, during which AOK Events won new contracts with clients including online supermarket Ocado, clothing retailer Karen Millen, jewellery brand Swarovski and US global executive search firm Egon Zehnder. The agency delivered Ocado’s UK annual supplier conference for 550 delegates and a seven-day global partners’ conference for Egon Zehnder earlier this year.
Meanwhile, Santander awarded Banks Sadler preferred-supplier status for event management and venue finding in February. Santander has worked with Banks Sadler for 15 years.