The extent of the executives’ sales was hard to determine in part because Signature filed the documents with the Federal Deposit Insurance Corporation, rather than the Securities and Exchange Commission, which is typical for companies of its size.
Most banks of this size have their securities regulated by the SEC and file their forms there.
Signature was one of only two companies in the S&P 500 that didn’t file insider-trading transactions to the SEC. The other was First Republic Bank, which was rescued by a $30 billion deposit by a group of large banks.
Source: Signature Bank Insiders Sold $100 Million in Stock During Crypto Surge – WSJ