Stevenson Aggregates Ltd

What Stevenson Aggregates Ltd does

Stevenson Aggregates Ltd is a New Zealand quarry and concrete operator providing construction materials across the upper North Island. Founded in 1917 as W. Stevenson & Sons Ltd and now a wholly-owned subsidiary of Fulton Hogan (acquired 2018), the company operates 14 sites spanning Auckland, Waikato, and Bay of Plenty regions, with 250+ employees. Its three core business divisions are: Aggregate Products (roading aggregates, sealing chips, basecourses, drainage aggregates, sand, and concrete aggregates manufactured to Waka Kotahi NZTA specifications); Concrete Products (standard, specialized, and low-carbon concrete formulations including high-durability, spray, precast, flow fill, Hydrovia permeable, and engineered mixes, plus low-carbon options like ECOPERLITE using natural volcanic perlite and CarbonCure technology brought to the NZ market by Stevenson); and IANZ Accredited Labs (testing services for aggregates, concrete, and civil engineering applications, with continuous IANZ accreditation since 1975).

The business operates a B2B sales-led go-to-market targeting construction companies, infrastructure developers, local authorities, and residential builders. Revenue is generated through direct quote-based sales of aggregates and ready-mix concrete delivered from quarry sites using company transport, supplemented by professional laboratory testing services and recurring government/infrastructure supply contracts (e.g., Watercare's Puketutu Island project, Auckland Transport). Technology differentiators include the iStrada paperless ticketing platform for real-time concrete delivery tracking and XRF contamination screening for soil assessment. Key assets include the Clevedon Quarry with 3 million tonnes/year extraction capacity and 50-year consented life, plus multi-decade reserves at Poplar Lane (operating since 1940s), Tauhei (manufacturing for 100 years), and Waingaro (operating since 1947). The company's competitive position is anchored by over 100 years of brand history, IANZ-accredited technical capability, regulatory resource consents, and integration with Fulton Hogan's broader infrastructure services portfolio.

Name

Stevenson Aggregates Ltd

Legal name

Stevenson Aggregates and Stevenson Concrete

Website

https://stevensonresources.co.nz

Company type

Private

Founded year

1917

Operating status

Operating

Headcount range

1–10 employees

Short description

Stevenson Aggregates Ltd is a New Zealand quarry and concrete operator (founded 1917) running 14 sites across Auckland, Waikato, and Bay of Plenty, producing aggregates, ready-mix concrete, and IANZ-accredited lab testing services for construction, infrastructure, and government clients as a Fulton Hogan subsidiary.

Ownership category

akta.pro rank

Product category

Construction Aggregates and Concrete

NAICS

Nonmetallic Mineral Mining and Quarrying (2123), Construction Sand and Gravel Mining (212321), Ready-Mix Concrete Manufacturing (327320)

SIC

Mining & Quarrying Of Nonmetallic Minerals (No Fuels) (1400), Concrete Products, Except Block & Brick (3272)

akta.pro primary industry

Construction Aggregates Mining & Processing (Sand, Gravel, Crushed Stone) (IMADAAAI)

akta.pro secondary industries

Crushed Stone Quarrying & Processing (IMAKAHAA), Sand & Gravel Extraction & Processing (IMAKAHAB), Aggregates Logistics, Terminals & Distribution (IMADAAAK)

Keywords

• Quarry aggregate products
• Ready-mix concrete supply
• Construction materials production
• Roading drainage aggregates
• IANZ accredited lab testing

Headquarters

HQ city

Drury

HQ country

New Zealand

HQ region

Oceania

Offices9 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Operations, Personnel, Supply Chain, Infrastructure, Marketing or Sales

Revenue model

1. Aggregates Sales: Sale of quarry aggregates including roading materials, sealing chips, basecourses, drainage aggregates, sand, and concrete aggregates. Products sold by weight/volume with direct delivery from quarry sites.
2. Ready-Mix Concrete Sales: Production and sale of ready-mix concrete products for commercial, infrastructure, and residential applications. Includes specialized mixes such as high-durability, spray, precast, and flow fill.
3. Laboratory Testing Services: IANZ accredited testing services for aggregates, concrete, and civil engineering applications. Includes compression testing, particle size distribution, and quality compliance testing.

Pricing tiers

Go-to-market motion1 record

Distribution channels4 records

Marketing channels8 records

Core offering

Stevenson Aggregates Ltd operates quarries across Auckland, Waikato, and Bay of Plenty extracting and processing aggregates (roading, drainage, sealing chips, basecourses, sand, concrete aggregates), produces ready-mix concrete in standard, specialized, and low-carbon formulations, and provides IANZ-accredited laboratory testing services for aggregates, concrete, and civil engineering applications.

Product overview

Stevenson Aggregates Ltd is a quarry and concrete operator providing a comprehensive portfolio of construction materials organized into three core divisions: Aggregate Products (roading, drainage, sand, and concrete aggregates including specialized sealing chips, basecourses, and non-specified hardfill materials), Concrete Products (standard and specialized concrete for commercial, infrastructure, and residential applications including engineered, high-durability, spray, precast, flow fill, thermal backfill, self-compacting, Hydrovia® permeable, kerb, pump, and tremie mixes, plus low-carbon options like Fly Ash and ECOPERLITE™), and IANZ Accredited Labs (testing services for aggregates covering size/shape, weathering, cleanness, PSD, sand equivalent, and plasticity; concrete testing for compression, flexural, tensile strength and fresh sampling; and other civil engineering tests including XRF, segmental pavers, masonry, and ITS). The company also offers iStrada, a paperless delivery management platform for real-time concrete delivery tracking. Stevenson operates multiple quarries (Clevedon, Drury, Tauhei, Waingaro, Poplar Lane, Bell Road, Tūākau) across Auckland, Waikato, and Bay of Plenty regions, now fully owned by Fulton Hogan since 2018.

Differentiator

Problem solved

Functional benefit

Brands

• iStrada: Paperless ticketing and concrete delivery management system that allows customers to track deliveries, review tickets online and check order details.

Products and services

• Aggregate Products

Quantifiable outcome

• Reduce CO2 emissions in concrete production while maintaining performance
• +2 more outcomes

Named customers5 records

Segments5 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Six partnerships are on record, tiered core and minor.

• Aggregate and Quarry Association (AQA)coreOthers · 1 January 2021Stevenson Technical Manager Jayden Ellis elected as incoming chair of AQA which represents members on industry, government, health and safety, technical and planning issues. Stevenson represents the AQA on various transport infrastructure committees.
• Fulton HogancoreOthers · 1 January 2018Fulton Hogan acquired Stevenson Construction Materials in 2018, securing Drury quarry, four ready-mix concrete plants, transport, and lab testing facility. In 2019, Fulton Hogan integrated its existing upper North Island quarries into the Stevenson brand. Fulton Hogan started in 1933 and employs over 7,800 people.
• WatercareminorStrategic or Co-development Partner · 1 January 2012Puketutu Island Rehabilitation Project - supplied 225,000 tonnes of quarry overburden for use within the biosolid liner system protecting the island's aquifer. Project began in 2012 to dispose of waste solids from Mangere wastewater treatment plant.
• United ConcretecoreStrategic or Co-development Partner · 1 January 1962Established in Takanini in 1962, Stevenson partnered with United Concrete owning 50% initially. By 1987, Stevenson had gained 100% ownership. Plant established in Gavin Street Penrose where ready-mixed concrete plant still operates today.
• Te Maangai o WairerecoreStrategic or Co-development PartnerCultural partnership addressing potential cultural and environmental effects of quarrying activity. Parties have agreed to protocols and mitigation measures documented in Te Ara Tuupuna, a living document addressing potential adversities and providing solutions throughout the quarrying period and beyond.
• Community Liaison GroupminorOthersOngoing community engagement through regular meetings including local representatives. Part of planning process for quarry expansions and community feedback integration.

Scale indicators11 records

Recent moves11 records

Expansion highlights4 records

Direct peers

• Firth Concrete: New Zealand's largest concrete manufacturer and placer, operating ready-mix plants and aggregate quarries across the North and South Island. Directly comparable to Stevenson in serving NZ infrastructure, commercial, and residential construction markets with both concrete and aggregates.
• Atlas Concrete: New Zealand ready-mix concrete supplier operating in the upper North Island. Direct competitor to Stevenson Concrete in commercial and residential segments with comparable product offerings and regional footprint.
• Allied Concrete: Major New Zealand ready-mix concrete supplier with plants across the North Island. Overlaps directly with Stevenson Concrete in serving Auckland and Waikato commercial, infrastructure, and residential concrete customers with similar product mix and delivery model.

Broad incumbents

• Hanson New Zealand (Heidelberg Materials): Heidelberg Materials' New Zealand aggregates and concrete business, with quarries and concrete plants across the country. A broader incumbent offering overlapping capabilities to Stevenson including aggregates, ready-mix concrete, and contract-grade materials for roading.
• Holcim New Zealand: New Zealand subsidiary of global building materials giant Holcim, with aggregates, ready-mix concrete, and concrete products operations. Directly overlaps with Stevenson's product portfolio and competes for major infrastructure and roading contracts across NZ.
• Golden Bay Cement: New Zealand's only major integrated cement manufacturer and a key upstream supplier into the ready-mix concrete industry. Operates in the same construction-materials value chain as Stevenson and competes indirectly through concrete producers it supplies.
• Boral: Major Australian aggregates, concrete, and asphalt producer with historical Trans-Tasman footprint. A broader incumbent in construction materials with overlapping product categories (aggregates, concrete, asphalt) and similar specification-compliance business model serving infrastructure markets.

Others

• Fulton Hogan: Parent company of Stevenson since 2018 and broader Australasian infrastructure provider (7,800+ employees) spanning quarrying, roading, civil construction, and water infrastructure. Functions as a parent/related party but also operates overlapping aggregates and infrastructure capabilities that supply similar customers in the same regions.

Regional players

• Waikato Aggregates: Regional New Zealand aggregates producer operating in the Waikato region. Directly comparable as a regional aggregate competitor overlapping Stevenson's Tauhei and Waingaro quarries in customer segments including farming, roading, and concrete applications.
• McCallum Bros: New Zealand-owned aggregates, civil construction, and drainage materials supplier based in the upper North Island. Comparable regional player competing with Stevenson in aggregates supply for civil and infrastructure projects in overlapping North Island geographies.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/@Stevensonsince1917
• Facebookfacebook.com/StevensonNewZealand
• LinkedInlinkedin.com/company/stevenson-aggregates-ltd
• Instagraminstagram.com/stevenson.nz

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles12 records

Funding overview

Funding rounds

Investors

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

M&A

Investments

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

Frequently asked questions about Stevenson Aggregates Ltd