When trading on the U.S. markets, there are regulatory fees involved in selling shares. These are charged independently of your brokerage fees. These additional fees are mandated by governing bodies and are required for trading on U.S. markets.
These sell-side fees are:
An SEC Fee for the U.S. Securities and Exchange Commission to cover costs involved in their regulation of equity dealers and the equities market. This is set at US$8.00 for every US$1,000,000 sold, with a minimum charge of US$0.01.
A Trading Activity Fee (TAF) to support the operations of FINRA (a U.S. regulatory body). This is set at US$0.0000119 per unit sold, with a maximum charge of US$5.95 and a minimum charge of US$0.01.
You will see these recorded on trade confirmations, as well as in statements in your Tax & Documents section of Stake.
These are sell-side fees, and you can check out the pricing guides below: