She would almost certainly have early knowledge of irregularities at her own company but potentially more broadly in the sector because people talk. Trading restrictions don't really cost an employer anything so they often figure that it's easier to get rid of even the possible appearance of impropriety even if it costs some employees/their spouses money.

At the most basic level, I worked for a company that wouldn't let you sell company stock, even as a non-executive, during a window around earnings being reported.