Golden West Diagnostics

What Golden West Diagnostics does

Golden West Diagnostics, LLC is a Temecula, California-based specialty manufacturer of human native matrixes used in the preparation of standards and controls for immunoassay and mass spectrometry applications. Established in 2015 as the manufacturing arm of the Golden West Companies group (founded 1989 by Brian Golie), the company supplies biological raw materials including ultra-low analyte matrices (Mass Spect Gold product line), charcoal-treated and delipidized human serums, human serum albumin in multiple grades, human and animal protein fractions, tissue culture products, specialty whole blood, and toxicology matrices to in vitro diagnostic (IVD) manufacturers, contract research organizations, contract manufacturing organizations, patient reference labs, and academic institutions. The company holds ISO 13485:2016 certification, FDA Blood Establishment Registration, and a California Medical Device Manufacturing License, and operates as a 1-10 employee private LLC under parent Golden West Biologicals, Inc., alongside sister entities Golden West BioSolutions (distribution) and Golden West Biologicals (therapeutic HSA distribution).

The company monetizes through direct B2B sales of biological raw materials and OEM/contract manufacturing services, with pricing structured on a quote-based, pay-as-you-go model accessed through an online portal, phone orders, and a request-for-quote system. International reach is achieved through an authorized distributor network covering Japan (Veritas, Bizcom Japan, SUNFCO) and Australia/New Zealand (PM Separations), while US and European market presence is reinforced through participation in industry trade shows (MEDICA, ADLM). Revenue is generated primarily through one-time product transactions to enterprise customers in regulated diagnostics and life sciences supply chains, with no disclosed subscription or recurring-license model, and the company does not publicly report revenue, headcount growth, or capital events.

Name

Golden West Diagnostics

Legal name

Golden West Diagnostics, LLC

Website

https://goldenwest.bio

Company type

Private

Founded year

2015

Operating status

Operating

Headcount range

1–10 employees

Short description

Golden West Diagnostics is a Temecula, California-based specialty manufacturer of human native matrixes, processed serums, and protein fractions used as standards and controls for immunoassay and mass spectrometry applications. It supplies IVD manufacturers, CROs, CMOs, reference labs, and academic institutions.

Ownership category

akta.pro rank

Product category

Diagnostic Biological Materials

NAICS

In-Vitro Diagnostic Substance Manufacturing (325413)

SIC

In Vitro & In Vivo Diagnostic Substances (2835)

akta.pro industry

PRIMARYHLAAAMAL

Biomarker Assay & Reagent Development (LDT/IVD assay design, antibodies/standards/controls)

Healthcare & Life Sciences/Biotechnology & Biologics/Biomarkers and Companion Diagnostics

SECONDARYHLAHAAAA

Clinical Chemistry & Immunoassay Systems

Healthcare & Life Sciences/Medical Devices & Diagnostics/In Vitro Diagnostics (IVD) & Laboratory Diagnostics

SECONDARYHLAAALAB

Immunoassay Diagnostics (ELISA, chemiluminescence, serology)

Healthcare & Life Sciences/Biotechnology & Biologics/Diagnostics (Biotech-related)

Keywords

• Biological raw materials
• Human native matrixes
• Mass spectrometry matrices
• Immunoassay standards controls
• Diagnostic manufacturing supplies

Headquarters

HQ city

Temecula

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Technology or R&D, Infrastructure, Marketing or Sales

Revenue model

1. Biological Materials and Native Matrixes Sales: Golden West Diagnostics generates revenue through the sale of biological raw materials including human native matrixes, processed serums, protein fractions, and specialty products to IVD manufacturers and research institutions. Sales occur through direct transactions via online portal, phone orders, and distributor relationships.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels4 records

Core offering

Golden West Diagnostics manufactures and sells processed human native matrixes (human serum and plasma) used as standards and controls for in-vitro diagnostic test development and production. The company's portfolio centers on the proprietary Mass Spect Gold line of ultra-low analyte matrices for ultrasensitive mass spectrometry assays, alongside processed human serums, human serum albumin, animal protein fractions, specialty whole blood, tissue culture products, and OEM/contract manufacturing services for IVD manufacturers and research institutions.

Product overview

Golden West Diagnostics operates as part of the Golden West Companies conglomerate (alongside Golden West Biologicals and Golden West BioSolutions), specializing in the manufacturing of human native matrixes used in the preparation of standards and controls for immunoassay and mass spectrometry applications. The company's product portfolio centers on the Mass Spect Gold product line offering ultra-low analyte matrices for hormones, steroids, vitamins, and toxicology testing, complemented by processed human serums (charcoal treated, delipidized, filtered), human serum albumin in multiple formulations, animal protein fractions, tissue culture products, specialty whole blood, and OEM/contract manufacturing services. Golden West BioSolutions handles distribution of antigens, enzymes, human off-the-clot serum, and blood products, while Golden West Biologicals focuses on therapeutic Human Serum Albumin distribution.

Differentiator

Problem solved

Functional benefit

Brands

• Mass Spect Gold: Proprietary product line of human matrices for ultrasensitive assays in hormones, steroids, toxicology, and vitamins.

Products and services

• Mass Spect Gold Human Matrixes Proprietary product line of ultra-low analyte human serum and plasma matrixes designed for ultrasensitive mass spectrometry assays in hormones, steroids, toxicology, and vitamins testing, covering Vitamin A, D, E, K, Biotin, Homocysteine, MMA, Testosterone, Serotonin, Bile Acids, and Catecholamine for IVD manufacturers and research institutions.
• Processed Human Serums and Matrixes Specialty processed human serums including charcoal treated, delipidized, double charcoal treated, and pooled and filtered variants derived from defibrinated plasma, for immunoassay and mass spectrometry IVD manufacturing and research applications.
• Human Serum Albumin Therapeutic and diagnostic grade human serum albumin (HSA) offered in lyophilized, liquid 20%, and liquid 25% formulations for excipient use, stabilizer, and drug delivery applications.
• Human Serum Products Off the clot and defibrinated human serums including AB male serum, charcoal treated, delipidized, pooled, and filtered variants processed for tissue culture and diagnostic manufacturing applications.
• Animal Protein Fractions Bovine serum albumin in multiple grades (standard, NZ standard, reagent grade fatty acid free, gamma irradiated, sulfhydryl blocked), bovine cholesterol concentrate, and thrombin for research and diagnostic applications.
• Human Whole Blood Products Drug-free human whole blood with various anticoagulants (CPDA, K2 EDTA, K3 EDTA, Na EDTA, ACD) and specialty variants including elevated HbA1c samples for diagnostic manufacturing and research.
• OEM/Contract Manufacturing Custom OEM/contract manufacturing services for human matrices, protein fractions, and specialty biological materials tailored to IVD manufacturer specifications, with specialized processing capabilities for tissue culture and specialty whole blood products.
• Toxicology, Saliva and Urine Products pH treated human urine toxicology negative and specialty urine matrices for toxicology assay development and quality control applications.
• Tissue Culture Products Human serum products specifically processed and tested for tissue culture applications including cryopreservation and cell culture use.

Quantifiable outcome

• 30+ years of consistent product quality and customer relationships in biological materials supply

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

Feature4 records

Partnerships

One partnership is on record.

• OctapharmacoreChannel Partner/ Reseller/ Distributor · 1 January 2015Octapharma is an authorized distributor of Golden West Human Serum Albumin for excipient use. Golden West Biologicals, Inc. serves as the authorized distributor for Octapharma Human Serum Albumin (HSA) products including 5%, 20%, and 25% solutions in various fill sizes. These products are used as stabilizers in pharmaceutical and biologic products, drug delivery, and cryopreservation and cell culture applications.

Scale indicators3 records

Recent moves10 records

Expansion highlights4 records

Direct peers

• MilliporeSigma: Life science chemicals and biological products business of Merck KGaA. Directly competes with GWD in processed human serums, biological matrices, and reference standards used by IVD manufacturers and clinical labs. Has global distribution and a vastly larger catalog.
• Bio-Rad Laboratories: Diagnostics and life science research company with a substantial reagents, controls, and reference standards portfolio serving IVD manufacturers and clinical labs. Overlaps directly with GWD's standards/controls and immunoassay reagent offerings.
• LGC Group: UK-based reference materials and life science measurement company (including SeraCare, Biosearch Technologies, and AccuStandard). Provides clinical reference standards, serology controls, and biological matrices used by IVD developers — closely comparable to GWD's specialty matrix business.
• Cerilliant (a brand of Merck/Sigma-Aldrich): Reference standards provider (within the Merck KGaA/MilliporeSigma portfolio) specializing in certified reference materials for clinical, forensic, and toxicology mass spectrometry — directly comparable to GWD's Mass Spect Gold product line.
• Cambridge Isotope Laboratories: Specialty manufacturer of stable isotope-labeled reference standards and unlabelled reference materials for clinical mass spectrometry, including hormones, vitamins, and toxicology analytes. Targets the same clinical MS assay development market as Mass Spect Gold.

Broad incumbents

• Thermo Fisher Scientific: Largest life-sciences tools company, offering biological materials, sera, controls, and reference standards as part of a much broader analytical instruments and reagents portfolio. Competes with GWD across immunoassay and MS workflows but is not specialized to GWD's niche.
• Sartorius: Bioprocessing and lab products supplier offering cell culture media, sera, and biological materials used by diagnostic and pharma manufacturers. Competes in adjacent biological materials but focuses more on upstream bioprocessing than IVD reference standards.
• Lonza Group: Global CDMO and cell & gene therapy manufacturer with biological materials and cell culture offerings. Overlaps with GWD on serum and protein fractions, but operates at much greater scale across biologics manufacturing rather than IVD raw materials.

Emerging players

• Akron Biotechnology: Specialty biological materials supplier for cell therapy, regenerative medicine, and diagnostic applications. Offers human sera, plasma-derived products, and ancillary reagents that partially overlap with GWD's tissue culture and serum product lines.
• Gemini Bio-Products: Specialty manufacturer of cell culture media, sera (including human and animal), and reagents for research and bioprocessing use. Overlaps with GWD on tissue culture sera, animal protein fractions, and custom biological reagents, but does not focus on IVD reference standards.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks7 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/golden-west-diagnostics-llc-

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

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 Golden West Diagnostics