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Welborn paid $A79,434 for another 50,000 shares in the company, equating to a price of around $1.588 per share.
The highest point Resolute shares have hit this year was $1.86 last week, but the stock was at $2.35 in September.
Shares dipped on Tuesday after the release of the company's half-year result and had slumped by more than 8% this morning amid weak sentiment for gold stocks.
Welborn has steadily bought Resolute stock since his appointment as a director in early 2015, holding 350,000 shares when he first joined the board, initially as a non-executive director.
His stake is now 1.9 million shares, worth just under $3 million at yesterday's closing price.
He also holds around 4 million performance rights.
Resolute shares were at trading at below 40c when Welborn was announced as the new managing director in May 2015.
