S aroj Rani Gupta is the co-founder and a major shareholder of APL Apollo Tubes, India's largest producer of structural steel tubes and pipes. She founded the company, originally known as Bihar Tubes, in 1986 along with her late husband, Sudesh Kumar Gupta. Starting from a small manufacturing unit in Sikandrabad, the company grew steadily by focusing on innovation and building a strong distribution network.

Following her husband's passing, she played a role in guiding the family business, which is now managed by her son, Sanjay Gupta. Under the family's stewardship, APL Apollo has revolutionized the steel tube industry in India with new technologies like direct forming technology. The company's products are widely used in infrastructure, housing, and commercial construction. Her wealth is derived from her significant stake in the publicly listed company.