I am curious as to why other officers of this company are not also following Frost's lead?
Seems very weird to me that they would not be buying at least some for themselves.
Don't let it worry you. Jane Hsiao owns about 23MM shares. Uppaluri owns roughly 3.8MM shares. Rubin owns about 4MM shares. They and Frost own their pro rata shares of another ~15.5MM shares.
But Frost is, strangely enough, the only guy with a 2+B dollar wallet.