That article appears to talk about whether it is insider trading to trade on information that originated with a public company (insiders) and privately sold - i

That article appears to talk about whether it is insider trading to trade on information that originated with a public company (insiders) and privately sold - including sales information that hasn't been reported yet in public filings. There are serious questions about whether that, under US law, would be considered insider trading as it appears to be just that. Simply owning a single share of stock in a company does not make one an insider. An insider, in the US, is someone who either works for the company, owns more than 10% of a company or has some other kind of fiduciary duty to the company. Insider trading can include anyone trading on any information from insiders even if they themselves aren't. Mind, this is different in other countries.