As far as the public is concerned, Dr. Seuss has no known legal heirs to his wealth. Even Audrey, despite her leadership within Dr. Seuss Enterprises in the years following the author's death, is not known to have had any true legal ownership of it (via Distractify). Instead, according to Celebrity Net Worth, the vast amount of money from book sales and the licensing of Seuss properties (i.e., Netflix's "Green Eggs and Ham" adaption, which netted Dr. Seuss Enterprises about $5 million) is believed to solely go back into the company.
This revenue, which to this day still amounts to several million dollars annually, has been put toward fundraisers, employee salaries, promoting literacy in America, and donations to colleges and charities (via The San Diego Foundation). While his surviving family may or may not be millionaires, Seuss himself has proved to be immensely successful even now. As of 2020, he was cited as the second-highest earning deceased individual behind Michael Jackson (via CheatSheet).
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