Actually, I must admit the first link was not very clear.
Here's more from the second source
https://inequality.org/great-divide/updates-billionaire-pandemic/
"The combined fortune of the nation’s 660 billionaires as of Monday, January 18, 2021 was $4.1 trillion, up 38.6% from their collective net worth of just under $3 trillion on March 18, 2020"
"On March 18, 2024, the country has 737 billionaires with a combined wealth of $5.529 trillion,"
That's + 35% compared to January 18, 2021.
To sum up
In less than one year under Trump, +38%
In three years under Biden ÷35%