Anyone who's a whistleblower should compile key docs and put it in a "dead man's switch" service that releases your testimony/docs to multiple news agencies in the event of your untimely demise. The company you're whistle blowing against and their major shareholders should know this exists. Also, regularly post public video attesting to you current mental state.
* Enemies and competitors of A now have an incentive to kill you.
* If the info about A would move the market, someone who would like to profit from knowing the direction and timing now has an incentive to kill you.
* Risks about trustworthiness of this "service". What if the information is released accidentally. What if it's a honeypot for a hedge fund, spy agency, or a "fixer" service.
* You've potentially just flagged yourself as a more imminent threat to A.
* Attacks against loved ones seems to have been a thing. And doesn't trigger your deadman's switch.