ZOLL Medical Corporation

What ZOLL Medical Corporation does

ZOLL Medical Corporation, founded in 1980 and headquartered in Chelmsford, Massachusetts, is a wholly-owned subsidiary of the Japanese diversified conglomerate Asahi Kasei (TYO: 3407). The company designs, manufactures, and sells medical devices and software for cardiopulmonary resuscitation, cardiac monitoring, temperature management, and sleep apnea diagnosis and treatment. Its product portfolio spans public-access automated external defibrillators (AED 3, AED Plus, AED Pro), professional monitor/defibrillators (X Series, X Series Advanced, R Series, Propaq MD/M), the AutoPulse NXT automated CPR system, the LifeVest wearable cardioverter-defibrillator, the TherOx SuperSaturated Oxygen Therapy catheter system, the Thermogard intravascular temperature management platform, the WatchPAT home sleep apnea test, the remedē implantable system for central sleep apnea, and an extensive software ecosystem (RescueNet CaseReview/CodeWriter/CodeNet/Live/12-Lead/EventSummary, DeviceDashboard, PlusTrac, emsCharts, Dispatch, Billing, AR Boost, Care Exchange). Underlying technologies include proprietary Real CPR Help accelerometer-based feedback (standard since 2002), Rectilinear Biphasic defibrillation waveform, See-Thru CPR artifact filtering, and TRENDS remote patient monitoring analytics.

The business operates across seven primary customer segments — EMS and fire services, hospitals, public access/community, government and military, cardiac patient management, sleep apnea, and non-acute care — and distributes through a global enterprise field sales force, e-commerce (zollwebstore.com), exclusive distribution partnerships (e.g., BrainCool), and co-marketing relationships (Boston Red Sox/Fenway Park, RCX Sports Foundation, PulsePoint Foundation). Revenue is generated through capital hardware sales (defibrillators, monitors, ventilators, AEDs, temperature management systems, LifeVest, remedē, TherOx), recurring accessories and consumables (electrodes, batteries, cables), software subscriptions (RescueNet, DeviceDashboard, PlusTrac, emsCharts, Billing), and ExpertCare service plans. The company reported $2.4 billion in revenue for 2024, having grown nearly fivefold since 2010, and employs between 1,001 and 5,000 people across operations in the United States, Israel, Japan, and 13 additional countries.

Strategic growth has been driven by serial acquisitions — Itamar Medical in December 2021 (sleep apnea), TherOx in 2019 (SSO2 therapy), Cardiac Science in 2019 (AEDs), Respicardia in 2021 (remedē), and the Vyaire Medical ventilator business in 2024 — combined with organic product launches such as the Zenix Monitor/Defibrillator in 2025. Effective April 1, 2026, Eric Knudsen succeeded Jon Rennert as CEO; Knudsen brings a Corporate Development background and led the ZOLL Itamar division through its post-acquisition expansion. The company faces material regulatory headwinds from an FDA Warning Letter issued April 30, 2026, citing Quality System Regulation violations and medical device reporting failures across X Series AEDs, MRI-compatible ventilators, and electrodes at its Chelmsford facility.

Name

ZOLL Medical Corporation

Legal name

ZOLL Medical Corporation

Website

https://zoll.com

Company type

Private

Founded year

1980

Operating status

Operating

Headcount range

1,001–5,000 employees

Short description

ZOLL Medical Corporation, an Asahi Kasei subsidiary founded in 1980, develops and markets medical devices and software for cardiopulmonary resuscitation, cardiac monitoring, temperature management, and sleep apnea diagnosis and treatment. It serves EMS, hospitals, government/military, and public access markets globally, generating $2.4 billion in 2024 revenue.

Ownership category

akta.pro rank

Product category

Medical Devices and Software for Cardiopulmonary Resuscitation

NAICS

Health Care and Social Assistance (62)

SIC

Surgical & Medical Instruments & Apparatus (3841), Electromedical & Electrotherapeutic Apparatus (3845), Hospital & Medical Service Plans (6324)

akta.pro primary industry

Cardiac Rhythm Management (Pacemakers, ICDs, CRT) (HLAHAFAC)

akta.pro secondary industries

Cardiac Assist & Heart Failure Therapies (Implantables, Neuromodulation) (HLAHAFAL), Respiratory & Sleep Therapy Equipment (Oxygen, CPAP/BiPAP, Nebulizers) (HSABAKAD), Medical-Grade Device Connectivity & Device Management (MDM) (HLACAFAG), Cardiometabolic RPM & Chronic Disease Management (diabetes, hypertension, CHF, obesity) (HLALAFAA)

Keywords

• Medical device manufacturing
• Defibrillator and AED sales
• Cardiac resuscitation technology
• EMS and hospital software
• Sleep apnea diagnostics

Headquarters

HQ city

Chelmsford

HQ country

United States

HQ region

North America

Offices4 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Technology or R&D, Personnel, Marketing or Sales, Operations, Infrastructure

Revenue model

1. Medical Device Hardware Sales: ZOLL generates revenue primarily through the sale of professional medical devices including defibrillators, AEDs, ventilators, monitors, automated CPR devices, and temperature management systems. These are typically one-time capital equipment purchases with varying price points based on device complexity.
2. Software Subscriptions and Licensing: Revenue from software solutions including RescueNet suite (CaseReview, CodeWriter, CodeNet, Live, 12-Lead), DeviceDashboard, PlusTrac AED management, EMS Billing, Dispatch, and emsCharts. Cloud-based solutions likely follow subscription or license models.
3. Accessories and Consumables: Ongoing revenue from electrodes, batteries, cables, circuits, and other accessories required for device operation. Recurring revenue stream from consumables used with installed device base.
4. Therapy Devices: Sale of therapeutic devices including LifeVest wearable defibrillator, remedē System implantable sleep apnea device, and TherOx SSO2 Therapy system.
5. Service and Support: Revenue from ExpertCare service plans, technical training, and support services for installed customer base.

Pricing tiers

Go-to-market motion2 records

Distribution channels5 records

Marketing channels7 records

Core offering

ZOLL Medical Corporation develops, manufactures, and markets professional medical devices and software for cardiopulmonary resuscitation, cardiac monitoring and defibrillation, temperature management, automated CPR, sleep apnea diagnosis and treatment, and EMS/hospital data management. Its portfolio spans automated external defibrillators (AEDs), professional monitor/defibrillators, the LifeVest wearable cardioverter-defibrillator, WatchPAT home sleep apnea tests, the remedē System implantable central sleep apnea device, TherOx SuperSaturated Oxygen Therapy, Thermogard temperature management systems, the AutoPulse automated CPR platform, and the RescueNet software suite (CaseReview, CodeWriter, CodeNet, Live, 12-Lead, EventSummary, DeviceDashboard, PlusTrac, emsCharts, Dispatch, Billing, AR Boost, Care Exchange). Customers include EMS agencies, hospitals, government/military buyers, public access venues, and cardiac patients across more than 30 countries.

Product overview

ZOLL Medical Corporation, an Asahi Kasei company, offers a comprehensive portfolio of medical devices and software solutions for cardiopulmonary and respiratory care across the continuum of care. The product portfolio includes: AEDs (ZOLL AED 3, AED Plus, AED Pro) for public access and professional use with Real CPR Help technology; professional monitor/defibrillators (X Series, X Series Advanced, R Series, Propaq MD/M) for EMS, hospital, and military settings; automated CPR systems (AutoPulse NXT); LifeVest wearable cardioverter defibrillator for sudden cardiac death protection; sleep apnea solutions (WatchPAT home sleep apnea test and remedē System for central sleep apnea); TherOx SuperSaturated Oxygen Therapy for STEMI treatment; temperature management systems (Thermogard XP/HQ); and an extensive software ecosystem (RescueNet Suite including CaseReview, CodeWriter, CodeNet, Live, 12-Lead, EventSummary; DeviceDashboard; PlusTrac; emsCharts; Dispatch; Billing; AR Boost; Care Exchange) for data management, quality improvement, billing optimization, and interoperability. ZOLL operates across public safety, EMS, fire, hospital, non-acute care, government/military, and cardiac patient management market segments.

Differentiator

Problem solved

Functional benefit

Brands

• ZOLL Itamar: Sleep apnea diagnosis and management solutions including WatchPAT home sleep apnea test
• LifeVest
• remede System
• RescueNet
• Real CPR Help
• Thermogard
• AutoPulse
• TherOx
• X Series
• R Series
• ZOLL AED

Products and services

• ZOLL AED 3 Automated external defibrillator with Real CPR Help technology providing audio and visual feedback to guide rescuers in delivering high-quality CPR. For public access and lay rescuers.
• ZOLL AED Plus Automated external defibrillator featuring Real CPR Help with one-piece CPR-D-Padz and voice and text prompts including 'Push Harder' and 'Good Compressions' feedback. For public access and lay rescuers.
• AED Pro Professional-grade automated external defibrillator with manual override capability and Real CPR Help feedback for advanced rescuers.
• X Series Monitor/Defibrillator Lightweight (under 12 pounds), full-featured monitor/defibrillator for patients of all ages from neonates to adults, featuring Real CPR Help and 10 physiologic parameters including NIBP, EtCO2, SpO2, and invasive blood pressures. For EMS and hospital use.
• X Series Advanced Monitor/Defibrillator Advanced monitor/defibrillator featuring Real BVM Help for ventilation feedback, TBI Dashboard for traumatic brain injury patient management, and RescueNet CaseReview integration for post-case performance data review. For EMS and hospital advanced life support.
• R Series Defibrillator/Monitor Professional defibrillator/monitor for advanced life support featuring Real CPR Help, CPR Dashboard, and CodeNet compatibility for hospital resuscitation teams.
• Propaq MD Transport Monitor/Defibrillator Transport monitor/defibrillator for EMS and hospital transport with advanced monitoring capabilities.
• Propaq M Military Monitor/Defibrillator Military-grade trusted and proven monitor/defibrillator designed for military and tactical EMS operations.
• Zenix Monitor/Defibrillator ZOLL's most clinically advanced and easy-to-use professional monitor/defibrillator, featuring innovative, intuitive interface with brilliant visual display.
• AutoPulse NXT Resuscitation System Automated CPR device providing consistent, high-quality chest compressions during cardiac arrest, featuring patient-customized compression delivery for field and transport use.
• LifeVest Wearable Cardioverter Defibrillator (WCD) Proven sudden cardiac death protection device providing actionable insights into cardiac recovery with automatic detection and treatment of life-threatening arrhythmias.
• TherOx SuperSaturated Oxygen (SSO2) Therapy First FDA-approved catheter-based therapy to reduce infarct size by delivering high levels of dissolved oxygen to the heart immediately following PCI in STEMI patients, demonstrating 26% relative median size reduction.
• WatchPAT Home Sleep Apnea Test FDA-cleared innovative home sleep apnea test utilizing peripheral arterial tonometry signal for simple, accurate, and reliable sleep apnea diagnosis. Also FDA-cleared to identify AFib events and premature beats.
• remedē System First FDA-approved non-mask therapy for moderate to severe central sleep apnea, featuring an implantable device that automatically activates to restore normal breathing patterns during sleep.
• Thermogard XP Temperature Management System Intravascular temperature management system for precise patient temperature control in critical care settings.
• Thermogard HQ Temperature Management System Advanced temperature management system for therapeutic hypothermia and normothermia maintenance in hospital settings.
• RescueNet CaseReview Data management software providing snapshot of all data points collected during a code for immediate debriefing and aggregate data for quality improvement initiatives.
• RescueNet CodeWriter Handheld tablet application allowing scribes to take sophisticated notes during a code with real-time guidance and organization.
• RescueNet CodeNet Integrated software combining CodeWriter notes directly into CaseReview data management for seamless post-event analysis and quality improvement.
• RescueNet Live Telehealth solution enabling clinicians to view real-time data from ZOLL X Series Advanced devices used by EMS teams during patient transport.
• RescueNet 12-Lead Complete STEMI management platform facilitating efficient data sharing of 12-lead ECG from EMS to hospital to expedite patient care.
• RescueNet EventSummary Software capturing all clinical data from ZOLL AEDs for quality review, analysis, and post-event debriefing.
• DeviceDashboard Cloud-based remote monitoring platform allowing wireless viewing of all connected defibrillators, health assessment, and troubleshooting from a centralized dashboard.
• PlusTrac AED Program Management Interactive web-based solution for AED program administration, compliance tracking, and device health monitoring.
• ZOLL emsCharts Cloud-based patient care report documentation system designed for modern EMS workflows with anytime/anywhere access via computers, tablets, and mobile devices.
• ZOLL Dispatch Computer-aided dispatch and call-taking solution enabling quick response, effective communication, and quality outcomes with robust monitoring and QA functionality.
• ZOLL Billing Cloud-based EMS billing software automating workflows, eliminating billing errors, and ensuring compliance with current codes and fee schedules.
• ZOLL AR Boost Automated accounts receivable optimization solution automatically finding, correcting, and verifying patient and payer information to capture more revenue.
• ZOLL Care Exchange Interoperability platform facilitating bi-directional data flow between EMS, hospitals, and vendors in near real-time.
• Mobilize Rescue App Just-in-time instructional app providing step-by-step directions, interactive prompts, written instructions, and visual cues for using medical supplies in Mobilize trauma kits during emergencies.
• ZOLL Webstore (Accessories and Consumables) Direct e-commerce storefront (zollwebstore.com) for accessories including electrodes, batteries, cables, and circuits required for ZOLL device operation.
• ExpertCare Service Plans Service and support plans providing technical training and support services for the installed ZOLL device base.

Quantifiable outcome

• 23.4+ hour/day median patient compliance rate with LifeVest wearable defibrillator
• +5 more outcomes

Named customers5 records

Segments7 records

Ideal customer profiles6 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration5 records

AI capability6 records

Feature10 records

Partnerships

Five partnerships are on record, tiered core and flagship.

• PulsePoint FoundationcoreStrategic or Co-development Partner · 1 February 2026PulsePoint Foundation and ZOLL announced the Anyone Can Register initiative to expand the National Emergency AED Registry (NEAR) by mobilizing volunteers and AED manufacturers to add devices in their communities. Program launching February 2026 aims to make AED locations more accessible and improve cardiac arrest response.
• BrainCoolcoreChannel Partner/ Reseller/ Distributor · 1 July 2023ZOLL Medical Corporation received exclusive distribution rights for BrainCool's temperature management products across the United States and major European markets in July 2023. This partnership expands ZOLL's temperature management portfolio for critical care applications.
• RCX Sports FoundationcoreGTM or Marketing PartnerZOLL partners with RCX Sports Foundation to provide AEDs through grant programs as part of the 'Anything Can Happen. Anyone Can Help.' campaign to strengthen cardiac emergency readiness in youth sports across the United States.
• Boston Red SoxflagshipGTM or Marketing PartnerZOLL is the Official AED provider for Fenway Park and the Boston Red Sox, establishing the venue as a model for cardiac preparedness. This partnership positions ZOLL as the trusted AED brand in high-profile sports settings.
• National Emergency AED RegistrycoreStrategic or Co-development PartnerZOLL participates in the National Emergency AED Registry (NEAR) managed by PulsePoint Foundation, with approximately 212,000 of estimated 1.1 million AEDs deployed nationwide currently registered in the system.

Scale indicators7 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Stryker: Owns Physio-Control/LifePak and HeartSine — the most direct global competitor to ZOLL's monitor/defibrillators and AED lines. Competes head-to-head in EMS, hospital, and public-access defibrillation.
• Medtronic: Major cardiac rhythm management incumbent (ICDs, CRT, ablation) and one of the three majority-share holders in sleep apnea implants alongside ZOLL. Direct competitor across implantable and adjacent cardiac device categories.
• Boston Scientific: Cardiac rhythm management and electrophysiology competitor. Competes in hospital cardiology where ZOLL's LifeVest, X Series, and RescueNet are deployed, and has growing sleep apnea/surgical franchises.
• Inspire Medical Systems: Direct competitor in the implantable sleep apnea market — Inspire's hypoglossal nerve stimulation competes head-to-head with ZOLL's remedē System for central sleep apnea treatment.
• Abbott: Cardiovascular and cardiac rhythm management (ICDs, CRT-D) competitor; also competes in hospital diagnostics and remote monitoring relevant to ZOLL's TRENDS and RescueNet ecosystem.
• ResMed: Global leader in sleep apnea (PAP therapy, masks, diagnostics). Competes with ZOLL Itamar (WatchPAT, remedē) in the sleep apnea diagnosis and treatment continuum.
• Nihon Kohden: Japanese patient monitoring and defibrillator manufacturer with overlapping product categories — particularly relevant as a regional competitor in APAC and EMS/hospital monitoring.

Broad incumbents

• Koninklijke Philips N.V. Historically competed with HeartStart AEDs and has overlapping patient-monitoring/hospital informatics offerings. Broader portfolio but meaningful overlap in hospital resuscitation and connected care.
• GE HealthCare: Hospital-wide patient monitoring and anesthesia/critical care portfolio overlaps ZOLL's hospital, critical care, and connected-care offerings; broad incumbent rather than cardiac specialist.

Emerging players

• Mindray: Chinese medical device maker with growing global share in patient monitoring, AEDs, and defibrillators. Increasingly competitive on price-performance in EMS and emerging markets.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks7 records

Key highlights7 records

Customer concentration

• Xx.com/zollemsfire
• YouTubeyoutube.com/channel/UCQj31V_yV1cvduWyBETc80w
• Facebookfacebook.com/zoll.emsfire
• LinkedInlinkedin.com/company/13727
• Instagraminstagram.com/zollmedical

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Subsidiaries2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A15 records

Investments4 records

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about ZOLL Medical Corporation