Eyewear retailer Lenskart Solutions Ltd, home and furnishings company Wakefit Innovations Ltd and four other companies have secured Sebi's approval to raise funds through initial public offerings (IPOs), an update with the market regulator showed on Monday. Tenneco Clean Air India, Cordelia Cruises operator Waterways Leisure Tourism, cotton yarns manufacturer Shree Ram Twistex and industrial laminates manufacturer Lamtuf are among the companies that have received regulatory approval. Together, these companies are expected to raise over Rs 6,500 crore through their IPOs.