Some bank executives have spent millions buying up their company's stock since the coronavirus sell-off.

Over the course of March, executives and directors at Wells Fargo & Co. spent the most on their own company's stock with $6.0 million of purchases and no sales, according to an S&P Global Market Intelligence analysis of insider trading disclosures among all publicly traded banks with at least $10 billion in assets. The analysis was limited to open-market or private purchases or sales, excluding other transactions such as grants or gifts.

President and CEO Charles Scharf led the buying spree at Wells Fargo by purchasing $5.0 million worth of the bank's stock.

Andrew Feldstein, PNC Financial Services Group Inc.'s lead director, purchased $8.0 million of PNC stock, the largest buy of any insider in the analysis. However, other executives or directors at PNC were net sellers to the tune of $2.1 million, putting the bank second on the list of insider purchases. Spokespeople for Wells Fargo and PNC declined to comment, citing the earnings season.

Houston-based Prosperity Bancshares Inc. — along with Texas-based peers — have seen their stock hammered as a precipitous fall in the price of oil rattled the market. In March, shares in Prosperity fell some 25%. A spokesman for Prosperity wrote in an email that several insiders took advantage of the sell-off. For banks under $50 billion but greater than $10 billion, Prosperity Bancshares reported the most insider purchases in the month of March at $4.5 million. Chairman Tim Timanus was the top buyer with $2.8 million of purchases. Valley National Bancorp Director Jennifer Steans was not far behind with $2.5 million of acquired stock during March.

"I am very confident regarding the future of Prosperity Bancshares Inc.," Timanus said in a statement. "And I consider the current market an excellent opportunity to acquire additional ownership."