oh, I thought that the blonde lady in the first photo was a Walton. Who is she?
Nope, they're all CEO, President or Chairman at major companies:
CEO selfie L-R: John Bryant, CEO, Kellogg Company; Doug McMillon, CEO, Walmart blocks face of AG Lafley, COB, President and CEO, Procter & Gamble; Kees Kruythoff, President, North America, Unilever; Hugh Grant, Chairman and CEO, Monsanto; Indra Nooyi, Chairperson and CEO, PepsiCo; Denise Morrison, President and CEO, Campbell; Roberto Marques, Chairman, Consumer NA, J&J.
Even if it was the richest Walton (Christy), that would only account for $36.7b. According to Forbes, there are 4 Waltons each worth over $30b, plus another 2 at $4b+.
ETA: In case you needed help decoding the caption, the blonde lady is the CEO of Campbell.