Tenon Medical, Inc. is a medical device company. The Company has developed the Catamaran SI Joint Fusion System that offers a novel, less invasive approach to the SI joint using a single, robust titanium implant. The system features the Catamaran Fixation Device which passes through both the axial and sagittal planes of the ilium and sacrum, stabilizing and transfixing the SI Joint along its longitudinal axis. The angle and trajectory of the Catamaran surgical approach is also designed to provide a pathway away from critical neural and vascular structures and into the strongest cortical bone. Its trademarks include Catamaran, PiSIF, CAT PiSIF, ETAD, CAT SIJ Fusion System, SImmetry, MAINSAIL, SImmetry+, Catamaran Transfixation Fusion Device, Catamaran Transfixation Fusion System, and others. The Catamaran SI Joint Fusion System offers a novel, less invasive Inferior-Posterior approach to the SI joint using a single, robust titanium implant.