News: NXL Nuix Says Search Warrant Executed At Sydney Office, page-47

Thanks Ganesha.
So the insider trading accusations are based on more than historic data.
Did Macquarie and co. know?
…And that Doyle company allegedly set up to make a mint out of the IPO has a bit of a ckeeky name?

Cambridge Ductionary says ‘Black Hat’ is a well known business term:
https://dictionary.cambridge.org/dictionary/english/black-hat


black hat
noun [ C ]

UK

/ˈblæk ˌhæt/ US

/ˈblæk ˌhæt/


someone in a particular situation who is actingfor morally bad reasons, or something that shows who this person is:
The group is considered kind of a black hat in the consulting business.
In a dysfunctional organization, it is often impossible to tell who are wearing the black hats, and who are wearing the white hats.

a hacker (= a person who gets into computersystems without permission) who does this for criminal or bad reasons:
Black hats are highly motivated. There's a lot of money at stake.
Compare
white hat
More examples

• After Watergate, Republicans were seen as the black hats of the campaign business.
• "That's the problem with most cop shows," he explains. "It's the black hat, white hat thing."
• In the early days black hats were low-renthackers, working from home.
• We want to bring the fringe elements of the hacking community on board, and steer them away from being "black hats" - the malicioushackers responsible for website defacement and security breaches.