A SOX retaliation plaintiff need not demonstrate that they disclosed an actual violation of securities law; only that they reasonably believed that their employer was defrauding shareholders or violating an SEC rule. Indeed, a reasonable but mistaken belief is protected under SOX. “To demonstrate that a plaintiff engaged in a protected activity, a plaintiff must show that [s]he had both a subjective belief and an objectively reasonable belief that the conduct [s]he complained of constituted a violation of relevant law.”