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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,765 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureCivil Engineering FirmsLiestalHOLINGER AG
HOLINGER AG Logo
Verified· 4 sourcesTrust Score
Summary

About the company

HOLINGER AG is an engineering firm that develops and implements solutions for the water cycle, providing services in wastewater, water supply, hydraulic engineering, civil engineering, energy, industry, geology, urban drainage, environmental sustainability and digital planning.

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Offering

Products & services

Industry:Civil Engineering Firms
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4.1/5

HOLINGER AG

✓ Offered9
Wastewater
Wastewater treatment, concept development, design and construction of wastewater treatment plants for municipal and industrial wastewater projects; upgrades, operational optimisation, micropollutants, sludge recovery, phosphorus recovery and nitrogen removal.
Construction
Design of structural solutions for water, building and industrial construction; excavation planning, special foundation engineering, geotechnical investigations, fire protection, structural engineering, and construction of infrastructure and utility lines.
Digital planning
Digital planning with BIM, GIS and CAD; management, coordination, modelling, integrated data management, 3D modelling, network information systems and visualisations.
Energy
Energy solutions for decarbonising heat, cold, electricity and process energy; district energy supply, energy storage, heating centres, cooling systems, power plants and special installations.
Industry
Engineering services for industrial plants in water, air, soil, energy and infrastructure engineering; impact studies, laboratory analyses, preliminary design, detailed planning, implementation and operational support.
Urban drainage
Drainage concepts, general drainage planning, stormwater management, sponge city approaches, sewer systems, hydraulic analyses, sewer network management and measurement campaigns.
Environment & sustainability
Environmental impact assessment and environmental site supervision, sustainability consulting, contaminated site investigation and remediation, building pollutants, radon and indoor air measurements, geology and groundwater.
Water construction
Flood protection, revitalisation, defining river corridors, planning of watercourse maintenance, hazard mapping, risk analyses, hydrology reports and reconstruction measures.
Water supply
Planning and construction of facilities and utility lines, drinking water treatment, consulting and support during operations, strategic water supply planning, quality assurance and protection zones.
Trust & reputation

ranQ Trust Score of HOLINGER AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 100% · As of October 2026

HOLINGER AG scores 53.8 out of 100 points in the Reputation area of the ranQ Trust Score. This area carries 42% of the weighting.
x
CriterionValueWeight
  • Review quality: The average rating across all connected sources, smoothed against the industry mean. So 5.0 stars from three reviews do not outrank 4.7 from three hundred.70.824%
  • Review volume: The number of reviews across all sources. The scale is logarithmic: the first reviews count the most, and the maximum is reached at 50 reviews.27.910%
  • Review recency: The age of the most recent review. Two-year-old reviews deliberately sit in the middle, because that is normal for Swiss SMEs. Only after three years without a new voice does the value drop markedly.35.08%
HOLINGER AG scores 97.5 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
x
CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.100.012%
  • Company size: The headcount band, researched by ranQ or stated by the company. It is scored in steps rather than by head count, because the data only provides bands.90.07%
HOLINGER AG scores 86.7 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
x
CriterionValueWeight
  • Verification: Official register entry (commercial register with UID or professional-body record, 55 points), confirmed domain (20 points) and confirmed ranQ profile (up to 25 points, depending on completeness).86.722%
HOLINGER AG scores 50.0 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
x
CriterionValueWeight
  • Website authority: Ahrefs' Domain Rating measures, on a scale of 0 to 100, how strongly a website is linked from other websites. For Swiss SMEs the range up to 40 is typical; the maximum is reached at 35.100.04%
  • Media authority: Quality and number of editorial mentions, weighted by the importance of the source, plus the recency of the latest high-quality mention.0.04%
Qualifications+0.00

HOLINGER AG reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 2 customer reviews. As of October 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

Reviews

Aggregated rating

Aggregated rating
5
of 5

Aggregated from 2 reviews across all connected sources

Sources
GGoogle52
★TrustpilotSoon
PProvenExpertSoon

Further sources are added continuously and factored into the ranQ Rating.

Press

Media

June 30, 2026Media
«Het äs Gschmäckli»: Gemeindepräsidentin gibt Ehemann Bauaufträge
20min.ch
January 18, 2023Media
Holinger Gruppe mit Sitz in Liestal hat mit Andreas Borer einen neuen Konzernchef
bzbasel.ch

Knowledge

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Location

Galmsstrasse 4
4410 Liestal
Opening hours
Mon
08:00 - 18:00
Tue
08:00 - 18:00
Wed
08:00 - 18:00
Thu
08:00 - 18:00
Fri
08:00 - 18:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-105.956.432
Founded
1967 · 59 years
Last commercial register change
August 25, 2026
Employees
51 to 100
Legal form: Graded by liability and disclosure. The weight is kept small: a sole proprietorship is not a dubious company, it is just liable differently.
100.0
6%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.100.03%
    • Full methodology

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