A security tag incorporating a hybrid clamp that combines an attachment clamp with an RFID component. The attachment clamp is used to secure an item, such as an article of clothing, to the tag. The RFID component, e.g., an RFID antenna, transmits data signals to an RFID reader where the data signals are encoded with information stored about the security tag. The hybrid clamp combines the attachment features and RFID antenna features of the security tag in one clamp.