Who said retail stinks? Tell that to the richest family in America, who got multi-richer Tuesday after shares of Walmart (WMT) - Get Report rose 3% following a better-than-expected fourth quarter.

Shares have trekked slightly higher on Wednesday to $71.89.

That jump deepens the pockets even more of Sam Walton's three surviving children—Rob, Jim and Alice. On Wednesday, Rob's shares were worth $240 million, Jim's, $755 million, and Alice's, $501 million, according to data compiled by TheStreet.

Rob is on the retailer's board and its retired chairman. He has a net worth of $35.8 billion, the 15th highest in the world, according to Bloomberg data. Jim, whose net worth clocks in at $35.4 billion (17th wealthiest in the world), serves on the company's strategic and finance committees.

Alice has no active role in Walmart. She is an art patron, who spearheaded the Walton Family Foundation's effort to develop the Crystal Bridge Museum of Art, which opened in 2011 in Bentonville, Ark., and is dedicated to American art and artists. Her net worth stands at $34.7 billion, making her the 18th wealthiest person in the world.

Their dad co-founded the world's largest retailer in Rogers, Ark., in 1962. Worldwide, the company now has 11,500 retail units in 28 countries and 2.3 million employees.

Whether the paper gains for Walton's three heirs continue into the future is unclear. Walmart's stock could come under pressure as profits are weighed down from the shift to more people shopping online and signing up for Amazon (AMZN) - Get Report Prime accounts. Also not helping the bottom line are rising wages and investments Walmart is being forced to make to build out e-commerce infrastructure.

But for now, the children can rejoice over their paper wealth.