These Auckland-based critical infrastructure operators are primarily large, established firms, many with long histories, providing essential services across New Zealand. Key players include Air New Zealand, a leading airline connecting New Zealand globally, and major financial institutions like ASB Bank and Bank of New Zealand, both with over a century of operation. Spark New Zealand is a significant telecommunications provider, and Genesis supplies electricity and gas solutions. Health New Zealand also features prominently with several large regional divisions such as Te Toka Tumai Auckland and Counties Manukau.
The list highlights a strong presence of healthcare providers, with four out of the top fifteen companies belonging to the Hospitals and Health Care sector. This includes Health New Zealand's three regional entities in Auckland and Hato Hone St John, a charity offering essential health services. This concentration indicates a significant local focus on public and charitable health infrastructure.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
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 | |||
| 2 | 6,643 | ||||
| 3 |
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 | |||
| 4 |
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 | |||
| 5 |
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 | |||
| 6 |
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 | |||
| 7 |
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 | |||
| 8 |
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 | |||
| 9 |
Auckland Transportat.govt.nz
Planning and funding local public transport, operating roading network, managing parking and traffic systems in Auckland region. |
2,206 | |||
| 10 |
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 | |||
| 11 |
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 | |||
| 12 | 1,820 | ||||
| 13 |
2degrees2degrees.nz
Full service telecommunications provider offering mobile network coverage and internet services across New Zealand with strong customer focus. |
1,707 | |||
| 14 |
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 | |||
| 15 |
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 | |||
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. | |||||
| 16 |
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 | |||
| 17 |
Chorus NZ Limitedchorus.co.nz
Providing and innovating New Zealand's telecommunications network infrastructure, enabling digital connectivity and supporting businesses and communities nationwide. |
989 | |||
| 18 |
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 | |||
| 19 |
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 | |||
| 20 |
Auckland Airportaucklandairport.co.nz
Handles over 18.5 million passengers annually, supports tourism, trade, and economy, and invests in sustainable travel infrastructure. |
888 | |||
| 21 |
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 | |||
| 22 |
Kordiakordia.co.nz
A leading provider of mission-critical technology solutions including connectivity, infrastructure, cyber security, field services, media, safety of life services, and more |
563 | |||
| 23 |
Green Cross Healthgreencrosshealth.co.nz
A leading provider of primary health care services in New Zealand, offering pharmacy, medical, occupational health, and community care divisions nationwide |
476 | |||
| 24 |
Heartland Bank LTDheartland.co.nz
Innovative financial services group with a focus on inclusivity and diversity, offering specialist products for household, business, and rural sectors |
438 | |||
| 25 |
Fidelity Lifefidelitylife.co.nz
Leading New Zealand life insurer providing certainty for a rewarding life through local ownership, customer focus, and closing the protection gap |
437 | |||
| 26 |
Awanui Groupawanuigroup.co.nz
Leader in human and veterinary pathology in New Zealand, offering services through multiple pathology networks and collection centers nationwide |
434 | |||
| 27 |
Enviro NZenvironz.co.nz
Specializes in waste management and resource recovery, partnering with government, communities, and businesses to deliver sustainable environmental solutions. |
429 | |||
| 28 |
Southern Crosssoutherncross.co.nz
A health-focused group in New Zealand offering health insurance, private hospitals, and various insurance options, operating on not-for-profit principles |
357 | |||
| 29 |
Whakarongorau Aotearoa // New Zealand Telehealth Services//whakarongorau.nz
A national telehealth service providing free health and mental health advice, support, and information 24/7, 365 days a year in Aotearoa |
342 | |||
| 30 |
Radius Careradiuscare.co.nz
Providing unparalleled care and quality of life for residents through world-class facilities and a dedicated team committed to genuine, respectful, and professional service |
321 | |||
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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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