Colt is enabling trading companies to connect to the London Stock Exchange datacentre in 100 microseconds, following a deal with the UK's primary trading venue.
The time taken for information to go between the stock exchange and trading firms is vital to the competitiveness of both.
For example, with trading companies dealing in microseconds, a three millisecond journey to and from the exchange can make a massive difference.
The stock exchange already has a service where trading companies can put their systems in its datacentre to reduce the message latency. The deal with Colt offers an alternative.
Antoine Shagoury, CIO at the London Stock Exchange Group, said: "This new proximity hosting service will complement our established co-location offering, providing additional choice for customers looking to access our central London data centre".
The London Stock Exchange already claims to have the fastest trading system in the world. Its Turquoise trading platform, which uses its MillenniumIT trading software, boasts average trading time from order to completion in microseconds.
The exchange said the average time taken to complete a trade on Turquoise is 126 microseconds, with 99.9% of trades completed in less than 400 microseconds.
The main London Stock Exchange is planning to move to the MillenniumIT system this year.
This has been delayed following a problem at Turquoise late last year, which caused Turquoise to go down for two hours.