Martha Stewart net worth: Martha Stewart is an American entrepreneur and television personality who has a net worth of $300 million. Martha Stewart earned her net worth from a business conglomerate, which includes TV, magazines and products for the home. Martha also hosts a satellite radio show. Martha has written several cookbooks, books and instructional manuals for the home decorator. Martha's first book was published in 1983. She is the founder and former CEO of Martha Stewart Living Omnimedia. After the first day of being a public company, Martha Stewart's stake was worth more than $1 billion. Today the value of Martha Stewart Living Omnimedia has decreased significantly.