a person’s dealing in securities for his account or on behalf of a third party by sale, purchase, submitting an offer of sale or purchase or Acquisition in respect thereof, issuance, public offer for Subscription, waiver of the right to subscribe, promoting, marketing, undertaking to cover a Subscription, custody, listing, depositing, settling, financing the dealing of, lending, short sale, pledge, waiver of securities, or any other transaction which the Authority deems as dealing in Securities.