This selection of New Zealand's critical infrastructure operators features large organizations, with a strong presence of healthcare providers and financial institutions. Health New Zealand | Te Whatu Ora manages the health system, while Air New Zealand provides air travel services. ASB Bank and Bank of New Zealand are key players in the banking sector. Spark New Zealand delivers telecommunications solutions, and NZ Transport Agency Waka Kotahi manages the land transport system.
A notable pattern is the concentration of headquarters in Auckland and Wellington. Auckland hosts companies like Air New Zealand, ASB Bank, and Spark New Zealand, covering aviation, banking, and telecommunications. Wellington is home to Health New Zealand | Te Whatu Ora, NZ Transport Agency Waka Kotahi, and NZ Post, representing healthcare, government administration, and logistics.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Health New Zealand | Te Whatu Orahealthnz.govt.nz
Te Whatu Ora manages the health system at various levels, providing hospital services, public health initiatives, primary care, and improving health outcomes in partnership with the M膩ori Health Authority |
9,861 | |||
| 2 |
Air New Zealandairnewzealand.com
Leading airline providing innovative, customer-focused air travel services connecting New Zealand with the world, emphasizing strong values and culture. |
7,894 | |||
| 3 | 6,643 | ||||
| 4 |
Bank of New Zealandbnz.co.nz
A leading financial institution in New Zealand with a 160-year history of helping customers achieve their financial goals and create a better future |
5,522 | |||
| 5 |
Spark New Zealandspark.co.nz
Providing advanced technology solutions, extensive network coverage, and enhanced customer experiences to support individuals and businesses across New Zealand. |
4,453 | |||
| 6 |
Westpac New Zealandwestpac.co.nz
Providing personal, business, and agribusiness banking solutions across New Zealand with extensive branch and ATM network support. |
4,266 | |||
| 7 |
Health New Zealand | Te Toka Tumai Aucklandadhb.health.nz
The company provides health and disability services to over half a million people in Auckland, Northland, and nationwide, including hospital care and community support |
3,315 | |||
| 8 |
NZ Transport Agency Waka Kotahinzta.govt.nz
Management and innovation of New Zealand's national land transport system ensuring safety, efficiency, sustainability, and connectivity for people and businesses. |
2,863 | |||
| 9 |
NZ Postnzpost.co.nz
Delivery partner for a digital world, providing innovative solutions for businesses through a state-of-the-art processing operation and efficient delivery services |
2,799 | |||
| 10 |
Kiwibankkiwibank.co.nz
A bank dedicated to supporting the people of New Zealand, creating a place where employees can belong, thrive, and make a difference |
2,719 | |||
| 11 |
KiwiRailkiwirail.co.nz
A leading integrated transport network and tourism operator in New Zealand, committed to safety, wellbeing, and providing world-class service to customers |
2,665 | |||
| 12 |
Health New Zealand | Waikatowaikatodhb.health.nz
Management and operation of daily healthcare services ensuring accessible and effective medical support for the Waikato region community. |
2,558 | |||
| 13 |
Health New Zealand | Counties Manukaucountiesmanukau.health.nz
Counties Manukau Health provides health and disability services to over 500,000 residents through collaboration, funding, hospital services, and health promotion initiatives, prioritizing health equity |
2,554 | |||
| 14 |
Genesisgenesisenergy.co.nz
Energy provider offering electricity, solar, and gas solutions with a focus on customer empowerment and innovative energy management options for homes and businesses |
2,502 | |||
| 15 |
Health New Zealand | Waitemat膩waitematadhb.govt.nz
Health New Zealand - Waitemata provides healthcare services to over 650,000 residents in Auckland's North Shore, Waitakere, and Rodney districts, including hospitals, mental health facilities, and community health services |
2,500 | |||
| 16 |
Health New Zealand | Capital, Coast and Hutt Valleyhealthnz.govt.nz
A health district in Wellington with over 6,000 staff, operating three hospitals and a health center, providing healthcare services in the region |
2,373 | |||
| 17 |
Auckland Transportat.govt.nz
Planning and funding local public transport, operating roading network, managing parking and traffic systems in Auckland region. |
2,206 | |||
| 18 |
Fletcher Constructionfletcherconstruction.co.nz
A team dedicated to planning, building, maintaining, and managing infrastructure in New Zealand and the South Pacific for generations to come |
2,139 | |||
| 19 |
Hato Hone St Johnstjohn.org.nz
A charity organization in New Zealand offering essential health services, Ambulance Services, first aid training, event medical services, and community programs |
1,860 | |||
| 20 | 1,820 | ||||
| 21 |
Delta Utility Servicesthinkdelta.co.nz
Specializing in infrastructure, they construct, manage, and maintain energy and environmental infrastructure across a specific region in New Zealand |
1,800 | |||
| 22 |
2degrees2degrees.nz
Full service telecommunications provider offering mobile network coverage and internet services across New Zealand with strong customer focus. |
1,707 | |||
| 23 |
Z Energy NZz.co.nz
Largest transport energy provider in New Zealand offering fuel products, EV charging services, and electricity retail through Flick Electric. |
1,476 | |||
| 24 |
Health New Zealand | Southernhealthnz.govt.nz
Leading the health system in New Zealand's Southern region, providing high-quality, patient-centered health services and working to improve health outcomes for all |
1,345 | |||
| 25 |
Transpower New Zealandtranspower.co.nz
Empowering New Zealand's energy future through innovation and sustainable solutions |
1,311 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 26 |
Capital & Coast District Health Boardccdhb.org.nz
Operates three hospitals and a health center, employing over 6,000 staff in the Wellington region, serving Capital, Coast, and Hutt Valley |
1,267 | |||
| 27 |
Watercare Services Limitedwatercare.co.nz
Provides lifeline services, drinking water, wastewater treatment, and infrastructure planning for Aucklanders, protecting the environment, without chemicals, safely returning it. |
1,205 | |||
| 28 |
Tower Insurancetower.co.nz
A company offering insurance solutions in New Zealand and the Pacific, focused on providing simple and rewarding experiences for customers |
1,131 | |||
| 29 |
Vector Limitedvector.co.nz
A leading distributor of electricity and gas in New Zealand, also operating in Australia and the Pacific Islands Providing innovative energy solutions |
1,091 | |||
| 30 |
HealthcareNZ Limitedhealthcarenz.co.nz
HealthCare NZ provides a wide range of healthcare services, specializing in community health, rehabilitation, disability support, mental health, behavior services, and training |
1,047 | |||
| 31 |
Contact Energy Ltdcontact.co.nz
A leading energy provider in New Zealand, focused on lowering carbon emissions and producing renewable energy for reliable access to energy |
1,044 | |||
| 32 |
ProCareprocare.co.nz
Leading healthcare provider delivering progressive, proactive, and equitable health and wellbeing services across Aotearoa for diverse communities. |
993 | |||
| 33 |
Chorus NZ Limitedchorus.co.nz
Providing and innovating New Zealand's telecommunications network infrastructure, enabling digital connectivity and supporting businesses and communities nationwide. |
989 | |||
| 34 |
Te Whatu Ora Te Pae Hauora o Ruahine o Tararua MidCentralmidcentraldhb.govt.nz
Health organization in New Zealand serving the Ruahine and Tararua regions with a focus on holistic well-being and healthcare services |
988 | |||
| 35 |
Tauranga City Counciltauranga.govt.nz
A leading organization in Tauranga, New Zealand, providing infrastructure, services, and investment to enhance the city's livability and attract diverse talent |
971 | |||
| 36 |
Northpowernorthpower.nz
An electricity and fibre network operator in Northland, New Zealand, providing specialist contracting services and focusing on community prosperity and safety |
962 | |||
| 37 |
Oceaniaoceaniahealthcare.co.nz
Transforming retirement and aged care experience to redefine living in a Village, prioritizing enjoyment, purpose, and individuality for a better lifestyle |
941 | |||
| 38 |
Mercury NZmercury.co.nz
A forward-thinking organization providing energy and telecommunications services, with a dedication to sustainability and creating a better future for New Zealand |
934 | |||
| 39 |
WM New Zealandwm.nz
Leading environmental services provider in New Zealand, offering resource recovery, waste management, recycling, and sustainable solutions for a diverse range of clients |
916 | |||
| 40 |
Auckland Airportaucklandairport.co.nz
Handles over 18.5 million passengers annually, supports tourism, trade, and economy, and invests in sustainable travel infrastructure. |
888 | |||
| 41 |
Meridian Energymeridianenergy.co.nz
This company generates electricity from renewable sources like water and wind, supplying homes, businesses, and farms in New Zealand |
868 | |||
| 42 |
Health New Zealand | Nelson Marlboroughnmdhb.govt.nz
Health New Zealand - Nelson Marlborough is a major healthcare provider in the region, serving 145,000 people with hospitals, public health services, and community programs |
867 | |||
| 43 |
Health New Zealand | Bay of Plentyinfo.health.nz
Provides healthcare services to a population of 200,000 in New Zealand, with a focus on enabling communities to achieve good health and independence |
830 | |||
| 44 |
Health New Zealand | Te Tai Tokerau Northlandhealthnz.govt.nz
A national health agency in Northland, providing health and disability services to 151,000 people Committed to improving population health and reducing inequities |
806 | |||
| 45 |
Evolution Healthcareevolutioncare.com
Leading provider of healthcare services in New Zealand with hospitals, day hospitals, maternity hospital, mental health clinics, and specialist health and wellbeing services |
718 | |||
| 46 |
Greater Wellingtongw.govt.nz
Regional council managing environment, flood protection, land, parks, public transport, water supply, policy development, and climate change planning. |
709 | |||
| 47 |
Airways New Zealandairways.co.nz
Providing air navigation services across 30 million square kilometres of airspace, ensuring safe travel for all aircraft in New Zealand. |
657 | |||
| 48 |
Health New Zealand | Taranakitdhb.org.nz
Provision of personal health, public health, and disability support services for geographically defined populations in the Taranaki region. |
611 | |||
| 49 |
Suncorp New Zealandsuncorp.co.nz
Leading insurance company focused on improving financial wellbeing, delivering better customer outcomes, and fostering employee growth and empowerment. |
610 | |||
| 50 |
Powercopowerco.co.nz
Specializing in electricity and gas distribution through extensive networks, connecting homes and businesses with essential energy infrastructure across New Zealand |
592 | |||
Turn this list into pipeline
Tamtam finds the decision-makers at every company on a list like this one, with verified emails, phone numbers and the buying signals that tell you when to reach out.
How this list is built
Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 12, 2026.
More company lists in New Zealand
- The largest companies in New Zealand 839
- Multinational companies in New Zealand 146
- Retail chains in New Zealand 101
- Public sector organisations in New Zealand 79
- Manufacturers in New Zealand 61
- Education providers in New Zealand 59
- Government Administration companies in New Zealand 57
- Companies with a mobile app in New Zealand 53
- Hospitals and Health Care companies in New Zealand 50
- Healthcare providers in New Zealand 49
- Professional services firms in New Zealand 49
- Financial services firms in New Zealand 48
- Companies with in-house R&D in New Zealand 43
- IT Services and IT Consulting companies in New Zealand 43
- Publicly traded companies in New Zealand 36
- Corporate groups and holding companies in New Zealand 35
- Food and beverage companies in New Zealand 34
- Construction companies in New Zealand 34
- Financial Services companies in New Zealand 34
- Distributors and wholesalers in New Zealand 34
- Retail companies in New Zealand 33
- Food and Beverage Services companies in New Zealand 32
- SaaS companies in New Zealand 31
- Higher Education companies in New Zealand 29