[rshm]

Is it possible or are there free data sources if an average person wants to dig into tradings of Jul 27, two day before official date of discovery.

[jannes]

No, that's not possible. These trades are only public because there is regulation that mandates Equifax to file trades by their employees above a certain level.

Statement of Changes in Beneficial Ownership: https://en.wikipedia.org/wiki/Form_4

Otherwise you have this trading information spread across thousands of brokers (and it doesn't become public)