I have worked many years as a broadcast engineer, and thus have worked closely with many broadcast journalists over the years.
First, you should know that there is no such thing as an "anonymous" tip to the media. The media uses "Fact Checkers" that will contact you to verify the details of any story before they run it. What they will do, though, is "protect" your identity when reporting the story.
Fortunately, in the US at least, protecting the identity of a source is something that is a very serious matter, and is something journalists take great personal and professional pride in doing, so you have that going for you.
However, no system is perfect. Any details you share with the media may be traceable to you. For instance, if you are one of only 5 people with access to confidential information, and the media gets it, and 3 of the other 4 are the ones who are harmed by it coming to light, it's not going to take the world's greatest detective to figure out who was talking to the media. Also, if it results in a criminal investigation, a judge can order a reporter to divulge their source. Some reporters have gone to jail on contempt charges to protect sources, and some US states have journalist shield laws, but you're depending on a lot of things to keep your identity safe.
And finally, even if there were criminal convictions, you could still be subject to civil lawsuits from the company if you violated your employee agreement by disclosing confidential information.
In short, the only one who will "Win" in this conflict is the journalist who gets recognized, and possibly rewarded for their work. The company won't. You and your coworkers will be "tarnished" by association (How does that 4 year stint at "Enron" look on a resume today?), and you will have to be happy with knowing you were on the side of Right, because you will most certainly have consequences for "turning them in."
It all comes down to how much you are willing to risk. If you believe your company's activities are harming society, and that people need to know about these activities, and you're willing to risk all of the above for the Common Good, God bless you and go for it. If this is about "revenge," then I would just walk away and go find a place to be happy.