Form 10-Q from TD Ameritrade https://research.ameritrade.com/wwws/stocks/secfilings/filing.asp?data=B64ENCeyJEb2N1bWVudEtleSI6IjEzNy0wMDAxNDc3OTMyMTIwMDIzNDgtM0xSVEU4UEg0QVBRUElGUEs2NjdGRFRVT0siLCJGT1JNQVQiOiJIVE0iLCJGT1JNX1RZUEUiOiIxMC1RIiwiQ0FURUdPUlkiOiJRdWFydGVybHkgRmluYW5jaWFscyIsIkRvY3VtZW50RGF0ZSI6IjIwMTItMDctMTggMjA6MTE6MzUiLCJEb2N1bWVudERhdGVfZiI6IjA3LzE4LzIwMTIiLCJBTUVOREVEIjpmYWxzZSwiQU1FTkRFRF9mIjoiIn0=