Ring-in-ring stiffeners on a semiconductor package substrate includes a passive device that is seated across the ring stiffeners. The ring-in-ring stiffeners are also electrically coupled to traces in the semiconductor package substrate through electrically conductive adhesive that bonds a given ring stiffener to the semiconductor package substrate. The passive device is embedded between the two ring stiffeners to create a smaller X-Y footprint as well as a lower Z-direction profile.