Bank of the Ozarks (NASDAQ: OZRK) has taken a number of interesting steps over the past year, but nothing is more interesting than its decision to no longer submit regulatory filings to the Securities & Exchange Commission, or SEC, where investors and analysts get information about publicly traded companies.The rapidly growing bank will remain a public company, and it will continue to trade on the Nasdaq, but it will submit all future regulatory filings to the Federal Deposit Insurance Corporation, or FDIC, its principal federal regulator.Its final submission to the SEC's EDGAR database was a Form 15-15D, filed on July 7.