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50 leading critical infrastructure operators in New Zealand

Tamtam tracks 100 critical infrastructure operators headquartered in New Zealand. This list ranks the 50 largest by number of employees on LinkedIn, led by Health New Zealand | Te Whatu Ora, Air New Zealand and ASB Bank. Their median headcount is 1,311. Half of them were founded in 1999 or later. The most common headquarters are Auckland (21) and Wellington (12).

馃嚦馃嚳 New Zealand50 companiesUpdated Nov 12, 2026

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.

#CompanyIndustryHeadquarters EmployeesFounded
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

Hospitals and Health Care 馃嚦馃嚳 Wellington 9,861 2022
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.

Airlines and Aviation 馃嚦馃嚳 Auckland 7,894 n/a
3
ASB Bankasb.co.nz

Providing business banking services, insights, advice, and resources to help established businesses in New Zealand grow and succeed.

Banking 馃嚦馃嚳 Auckland 6,643 1847
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

Banking 馃嚦馃嚳 Auckland 5,522 1861
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.

Telecommunications 馃嚦馃嚳 Auckland 4,453 1987
6
Westpac New Zealandwestpac.co.nz

Providing personal, business, and agribusiness banking solutions across New Zealand with extensive branch and ATM network support.

Banking 馃嚦馃嚳 New Zealand 4,266 n/a
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

Hospitals and Health Care 馃嚦馃嚳 Auckland 3,315 n/a
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.

Government Administration 馃嚦馃嚳 Wellington 2,863 2008
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

Freight and Package Transportation 馃嚦馃嚳 Wellington 2,799 1840
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

Banking 馃嚦馃嚳 Wellington 2,719 2002
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

Truck Transportation 馃嚦馃嚳 Wellington 2,665 2008
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.

Hospitals and Health Care 馃嚦馃嚳 Hamilton 2,558 2001
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

Hospitals and Health Care 馃嚦馃嚳 Auckland 2,554 n/a
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

Utilities 馃嚦馃嚳 Auckland 2,502 1999
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

Hospitals and Health Care 馃嚦馃嚳 Auckland 2,500 n/a
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

Hospitals and Health Care 馃嚦馃嚳 Wellington 2,373 1947
17
Auckland Transportat.govt.nz

Planning and funding local public transport, operating roading network, managing parking and traffic systems in Auckland region.

Government Administration 馃嚦馃嚳 Auckland 2,206 2010
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

Construction 馃嚦馃嚳 Auckland 2,139 n/a
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

Hospitals and Health Care 馃嚦馃嚳 Auckland 1,860 1885
20
One New Zealandone.nz

An organization representing New Zealand on LinkedIn

Telecommunications 馃嚦馃嚳 Auckland 1,820 2023
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

Utilities 馃嚦馃嚳 Dunedin Central 1,800 1998
22
2degrees2degrees.nz

Full service telecommunications provider offering mobile network coverage and internet services across New Zealand with strong customer focus.

Telecommunications 馃嚦馃嚳 Auckland 1,707 n/a
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.

Oil and Gas 馃嚦馃嚳 Wellington 1,476 2011
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

Hospitals and Health Care 馃嚦馃嚳 Dunedin 1,345 n/a
25
Transpower New Zealandtranspower.co.nz

Empowering New Zealand's energy future through innovation and sustainable solutions

Utilities 馃嚦馃嚳 Wellington 1,311 n/a

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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

Hospitals and Health Care 馃嚦馃嚳 Wellington South 1,267 1847
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.

Utilities 馃嚦馃嚳 Auckland 1,205 n/a
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

Insurance 馃嚦馃嚳 Auckland 1,131 1869
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

Utilities 馃嚦馃嚳 Auckland 1,091 1999
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

Hospitals and Health Care 馃嚦馃嚳 Wellington 1,047 n/a
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

Utilities 馃嚦馃嚳 Wellington 1,044 1995
32
ProCareprocare.co.nz

Leading healthcare provider delivering progressive, proactive, and equitable health and wellbeing services across Aotearoa for diverse communities.

Hospitals and Health Care 馃嚦馃嚳 Auckland Central 993 1995
33
Chorus NZ Limitedchorus.co.nz

Providing and innovating New Zealand's telecommunications network infrastructure, enabling digital connectivity and supporting businesses and communities nationwide.

Telecommunications 馃嚦馃嚳 Auckland 989 2011
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

Hospitals and Health Care 馃嚦馃嚳 Palmerston North 988 n/a
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

Government Administration 馃嚦馃嚳 Tauranga 971 n/a
36
Northpowernorthpower.nz

An electricity and fibre network operator in Northland, New Zealand, providing specialist contracting services and focusing on community prosperity and safety

Utilities 馃嚦馃嚳 North Island 962 n/a
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

Hospitals and Health Care 馃嚦馃嚳 Auckland 941 2008
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

Utilities 馃嚦馃嚳 Auckland 934 1999
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

Environmental Services 馃嚦馃嚳 Tamaki 916 n/a
40
Auckland Airportaucklandairport.co.nz

Handles over 18.5 million passengers annually, supports tourism, trade, and economy, and invests in sustainable travel infrastructure.

Airlines and Aviation 馃嚦馃嚳 Auckland 888 1960
41
Meridian Energymeridianenergy.co.nz

This company generates electricity from renewable sources like water and wind, supplying homes, businesses, and farms in New Zealand

Utilities 馃嚦馃嚳 Wellington 868 1999
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

Hospitals and Health Care 馃嚦馃嚳 Nelson 867 n/a
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

Hospitals and Health Care 馃嚦馃嚳 Tauranga 830 n/a
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

Hospitals and Health Care 馃嚦馃嚳 Whangarei 806 n/a
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

Hospitals and Health Care 馃嚦馃嚳 Auckland 718 n/a
46
Greater Wellingtongw.govt.nz

Regional council managing environment, flood protection, land, parks, public transport, water supply, policy development, and climate change planning.

Government Administration 馃嚦馃嚳 Wellington 709 n/a
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.

Airlines and Aviation 馃嚦馃嚳 657 n/a
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.

Hospitals and Health Care 馃嚦馃嚳 New Plymouth 611 n/a
49
Suncorp New Zealandsuncorp.co.nz

Leading insurance company focused on improving financial wellbeing, delivering better customer outcomes, and fostering employee growth and empowerment.

Insurance 馃嚦馃嚳 Cbd 610 2016
50
Powercopowerco.co.nz

Specializing in electricity and gas distribution through extensive networks, connecting homes and businesses with essential energy infrastructure across New Zealand

Utilities 馃嚦馃嚳 New Plymouth 592 n/a

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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.

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