As market volatility spreads to financial sectors around the globe, CEOs, CFOs, and directors of numerous US banks continue to buy stock in a big way.

Here are yesterday’s Form 4s:

• Coastal Financial Corporation $CCB.
• Fifth Third Bancorp $FITB.
• Lakeland Financial Corporation $LKFN.
• Byline Bancorp $BY.
• Brookline Bancorp $BRKL.
• Cullen/Frost Bankers $CFR.
• FB Financial Corporation $FBK.
• Customers Bancorp $CUBI.

However, the most notable insider activity from yesterday wasn’t a regional bank.

It was the largest brokerage in the US.

The regional banking panic that began last week has caused a drastic repricing of financial stocks. 

As selling pressure accelerates for a variety of vulnerable banks, executives are coming out and buying shares in an effort to shore up the volatility and put a vote of confidence in their stock.

The most significant insider transaction on today’s list comes in a 13D from Carl Icahn reporting an increase in his Southwest Gas Holdings $SWX stake.

Icahn now owns 12.64% of outstanding shares, a significant change from the 9.8% he reported on October 26.

The largest insider buy on today's list comes in a Form 4 filing by Energy Holding Corp.

The firm revealed a $21 million purchase of Tecnoglass $TGLS shares.

The biggest Form 4 filing on today's hot list is from Catherine Spear, CEO of FIGS Inc $FIGS.

Spear reported the purchase of 790,000 FIGS shares, equivalent to $4.9 million.

We’ve been looking out for this filing since last week!

Right on time, Uncle Warren strikes again with the Berkshire put in Occidental Petroleum $OXY.

The largest insider buy on today's list comes from DISH Network Corporation $DISH co-founder and executive vice-president, James DeFranco. 

DeFranco revealed a purchase of $15.7 million worth of DISH shares in his latest Form 4.

The largest insider buy on today's list comes in a Form 4 filing by Russell J. Weiner, the CEO of Domino's Pizza $DPZ.

Weiner revealed a $1 million purchase of DPZ shares.

The largest insider buy on today's list comes in a Form 4 filing by NextEra Energy $NEE director Kirk S. Hachigian.

Hachigian revealed an NEE purchase worth $700,000.

The largest insider buy on today's list comes in a Form 4 filing by Mark P. Vergnano, a director of Waters Corporation $WAT.

Vergnano reported a purchase worth $997,927.

The largest insider buy on today's list comes in a Form 4 filing by Wes Cummins, a director of Vishay Precision Group $VPG.

Cummins reported a purchase of $370,175.

The largest insider buy on today’s list comes in a Form 4 filing by Kelcy Warren, co-founder and executive chairman of Energy Transfer $ET.

Warren reported an additional purchase, this one worth $21.6 million.