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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryIndustryPharmaceutical IndustryZofingenSiegfried AG
Siegfried AG Logo
Verified· 4 sourcesTrust Score
Summary

About the company

Siegfried AG is a contract development and manufacturing organization (CDMO) that develops and manufactures active pharmaceutical ingredients, intermediates and finished dosage forms. As an integrated supplier, the company provides services from process development and optimization to regulatory support, manufacturing, packaging and supply‑chain management across a global network of production sites.

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Products & services

Industry:Pharmaceutical Industry
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Siegfried AG

✓ Offered7
API manufacturing
API manufacturing from early development through commercial production; process development, scale-up, tech transfer, CDMO services, and supply of active pharmaceutical ingredients and intermediates.
Medicinal product manufacturing
Development and manufacturing of medicinal products from pilot phase to commercial production; solid oral dosage forms, sterile injectables, ophthalmics, inhalation products and product transfer.
Technical services for drug substances and drug products
Analytics, method development and validation, formulation development, process optimization, stability testing, high-containment processing, as well as spray drying, milling and micronization.
Custom synthesis
Exclusive synthesis of customer-specific active ingredients and intermediates with chemical process development, analytical development and production from gram scale to industrial scale.
API portfolio
Provision of established active pharmaceutical ingredients from the API catalogue for licensing and supply.
Preclinical and early-phase development
Preclinical and early-phase development services with process development, route scouting, scale-up, tech transfer and analytical support for drug substance programs.
Viral vectors
End-to-end viral vector manufacturing for gene therapy projects, including process development, quality control, analytics and manufacturing services.
Trust & reputation

ranQ Trust Score of Siegfried AG: 4.2 out of 5.0

Trust Score4.2/ 5.0

Very high

x

Data basis 100% · As of October 2026

Siegfried AG scores 64.1 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.50.924%
  • 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.67.110%
  • 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.100.08%
Siegfried AG scores 96.8 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.100.07%
Siegfried 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%
Siegfried 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

Siegfried AG reaches a ranQ Trust Score of 4.2 out of 5.0 — rated «Very high». The rating draws, among other things, on 3.8 out of 5 stars from 13 customer reviews. As of October 2026.

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

Reviews

Aggregated rating

Aggregated rating
3.8
of 5

Aggregated from 13 reviews across all connected sources

Sources
GGoogle3.813
★TrustpilotSoon
PProvenExpertSoon

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

Press

Media

August 15, 2025Media
Nach Cyber-Attacke: Laborant erwirkt mit der Unia ein wegweisendes Urteil
workzeitung.ch

Knowledge

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Location

Untere Brühlstrasse 4
4800 Zofingen
Opening hours
Mon
07:30 - 15:30
Tue
07:30 - 15:30
Wed
07:30 - 15:30
Thu
07:30 - 15:30
Fri
07:30 - 15:30
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-106.816.578
Founded
1991 · 35 years
Last commercial register change
July 21, 2026
Employees
More than 500
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.70.03%
    • Full methodology

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