Mumbai, Sept. 23 -- Airtel Money, the fintech arm of Bharti Airtel Ltd that operates across sub-Saharan Africa, is planning what could be the largest new listing on the London Stock Exchange in five years.

The company on Wednesday disclosed plans in an LSE filing to make its public-market debut through an offer for sale, meaning existing shareholders will sell their stakes and Airtel Money will not raise fresh capital. Officially called Airtel Mobile Commerce, the company is a subsidiary of Airtel Africa Plc, which is also listed on the LSE.

Airtel Africa, in turn, is a subsidiary of telecommunications major Bharti Airtel Ltd, the third-most valuable Mumbai-listed company. Bharti Airtel shares closed 0.7% higher at Rs.1,829.75 on the BS...