BENGALURU, Nov 2 (Reuters) - Indian logistics firm Delhivery is seeking a valuation of more than $5.5 billion, a source familiar with the matter told Reuters, as the SoftBank-backed company filed for an initial public offering of up to 74.6 billion rupees ($997.33 million). The filing comes on the heels of several public offerings this year, such as TPG-backed Nykaa, SoftBank-backed Paytm and online insurance aggregator Policybazaar, as abundant liquidity and strong retail participation pushed the Indian stock market to record levels. Delhivery, which is also a third-party logistics provider for Amazon.com Inc (AMZN.O), competes with DHL"s unit Blue Dart Express Ltd (BLDT.NS) and DTDC India in a sector that had a direct spend of $216 billion in fiscal 2020 and is expected to grow to $365 billion by fiscal 2026. The company"s IPO will consist of a fresh issue of shares worth 50 billion rupees and an offer for sale of shares worth 24.6 billion rupees, according to a copy of Delhivery"s draft herring prospectus dated Nov. 1. Private equity firm Carlyle Group Inc (CG.O), which has a 7.42% stake in the company is selling shares worth 9.2 billion rupees in the IPO, while majority shareholder SoftBank Group Corp (9984.T), with a 22.8% stake, is looking to offload shares worth 7.5 billion rupees. Delhivery"s loss widened to 4.16 billion rupees for the fiscal year ended March 31, 2021, from 2.69 billion rupees a year earlier, while revenue from contracts with customers rose 31% to 36.47 billion rupees. Kotak Mahindra Capital, Morgan Stanley, BofA Securities and Citigroup are the bookrunning lead managers for the IPO. Fashion and cosmetics e-commerce platform Nykaa on Monday became the latest start-up to draw strong investor interest for its public offering, with bids oversubscribed by nearly 82 times. read more ($1 = 74.8000 Indian rupees) Reporting by Chandini Monnappa and Rama Venkat in Bengaluru; Editing by Subhranshu Sahu and Shounak Dasgupta