The Deutsche Boerse subsidiary outlined its existential incentive in maintaining and nurturing its existing strong and proven relationships with London-based firms in its monthly transaction data report for September.
Clearstream said it is preparing for Brexit by joining forces with all other entities of Deutsche Börse Group.
Despite the uncertainty that came after the referendum results last year, Clearstream said its main objective through Brexit was to minimise risk of cross-border settlement.
It is unclear how Clearstream and other financial services providers will be able to provide for their UK clients if the current Brexit negotiations fail to yield a viable deal for financial services to operate across the channel after the March 2019 deadline.
Philip Brown, co-CEO of Clearstream Banking, said: "We standardise what is fragmented. Clearstream has supported its clients in tough transitions before, among them the Argentina default and the beginning of the sovereign debt crisis with the restructuring of Greek bonds."
Clearstream’s September report showed that assets under custody increased by 2 percent from €13.1 billion to €13.4 year over year.
Year to date assets under custody was down 12 percent from €524.4 billion to €463.7 billion to the same period last year.