Reuters EIKON rebranded metastock Xenith is $115 or $165 a month. Not an api but you get all the red Reuters alerts and most of the stories behind the headlines.
Russian hacking group hacked the US listing agents and had the earnings before time. They won more than they lost but got arrested by the FBI when visiting Switzerland. CNBC documentary.
All securities brokerages and crypto exchanges report all sales and account balance to the OECD yearly. This information can then be accessed by your local tax authority...
Reuters EIKON rebadged Metastock Xenith will give you scrolling news for a ticker. $165 a month. Will give you all headlines in red (alerts) and most of the stories behind the headlines later. Full price expensive if you want all stories.