Ms. Burnthorn has tried numerous securities and commodities fraud lawsuits. Her primary practice is on behalf of defendants. She has tried securities cases brought against brokers and sellers of securities alleging misrepresentations and omissions of material facts, failure to supervise, churning, unauthorized trading, selling away, and unsuitability. She has handled matters under the Securities Act and the Securities Exchange Act, including issues for reporting companies and lawsuits arising out of broker/dealer registration provisions.

She has handled a limited number of securities cases on behalf of plaintiffs. For example, when a meritorious securities fraud case against a national broker dealer presented itself from the plaintiff's perspective, Ms. Burnthorn accepted the case. She alleged "selling away" and unauthorized trading, tried the case to conclusion, and obtained a judgment in favor of the plaintiff. In the self-service action, Ms. Burnthorn successfully represented a group of plaintiff investors seeking rescission of securities purchases and damages under Securities Act registration provisions, Securities Act fraud provisions, Securities Exchange Act fraud provisions, and the Louisiana Blue Sky Law. She has additionally presented programs instructing claims handlers on FINRA litigation.