We currently operate our business in two reportable segments - Implantable Medical and
Electrochem Solutions("Electrochem"). The Implantable Medical segment is comprised of our Greatbatch Medicaland QiG Groupand designs and manufactures medical devices and components for the cardiac, neuromodulation, vascular and orthopaedic markets. The Implantable Medical segment offers complete medical devices including design, development, manufacturing, regulatory submission and supporting worldwide distribution, which is facilitated through the QiG Groupand leverages the component technology of Greatbatch Medical. The devices designed and developed by the QiG Groupare manufactured by Greatbatch Medical. The Implantable Medical segment also offers individual components for implantable medical devices as well as value-added assembly and design engineering services for its component products. Examples of these components include batteries, capacitors, filtered and unfiltered feedthroughs, machined components, enclosures, leads, introducers, catheters, as well as orthopaedic implants, instruments and cases and trays. Electrochem is an industry leader in designing and manufacturing total power solutions for critical applications with market-leading OEMs, largely in the portable medical and energy space. Electrochem offers its customers components, consultation, design, development and testing for medical device applications in high-value markets, including those that support the transition of delivery of health care from clinical to outpatient and home settings, as well as those that enhance the quality of life for an aging population. Examples of these devices include powered surgical tools, automated external defibrillators, portable ultrasound devices, portable oxygen concentrators, and ventilators, among others. Electrochem provides cell and battery pack configurations for rechargeable and non-rechargeable battery power systems, charging and docking stations, and power supplies, for devices where failure is not an option. As discussed in Note 9 "Other Operating Expenses, Net" of the Notes to Condensed Consolidated Financial Statements in Item 1 of this report, in June 2013, we initiated a plan to realign our operating structure in order to optimize our continued focus on profitable growth. Under this initiative, the sales and marketing and operations groups of our Implantable Medical and Electrochem segments were combined into one sales and marketing and one operations group serving the entire Company. As a result of this realignment initiative, which includes changing the management and reporting structure, we are re-evaluating our operating and reportable segments.
Implantable Medical customers include leading original equipment manufacturers ("OEMs"), in alphabetical order here and throughout this report, such as Biotronik, Boston Scientific, Johnson & Johnson, Medtronic, Smith & Nephew,
Sorin Group, St. Jude Medical, Stryker and Zimmer. The nature and extent of our selling relationships with each OEM varies in terms of breadth of products purchased, purchased product volumes, length of contractual commitment, ordering patterns, inventory management and selling prices. During the nine months ended September 27, 2013, Johnson & Johnson, Medtronic and St. Jude Medical collectively accounted for 49% of our total Company sales.