The Chicago Board Options Exchange (CBOE) has filed a 19b-4 form for the CANARY PENGU ETF, positioning $PENGU as the second memecoin to undergo review by the U.S. Securities and Exchange Commission (SEC), following $DOGE. This filing places $PENGU alongside major cryptocurrencies such as Bitcoin ($BTC), Solana ($SOL), and Ripple ($XRP) in the SEC's evaluation process. The move marks a significant step for memecoins in gaining institutional recognition and potential market entry through regulated financial products.