What Gemini Bio-Products does

Gemini Bio-Products, LLC (doing business as GeminiBio) is a privately held biotechnology manufacturing company founded in 1985 and headquartered in West Sacramento, California. The company operates two segregated cGMP manufacturing facilities totaling 57,000 square feet, one dedicated to animal-origin-free (AOF) production and the other to animal-component production, supporting cell and gene therapy workflows that require cross-contamination control. GeminiBio is ISO 13485:2016 certified, FDA registered as a Class I Medical Device Manufacturer, and aligned with 21 CFR Part 820, holding a Drug Master File for clinical-grade human serum products.

The company organizes its offering into two verticals. Cell Culture Solutions encompasses GemPure high-purity waters and buffers, a comprehensive fetal bovine serum line (Premium, Stasis, Foundation, BenchMark, GemCell grades), clinical-grade human AB serum (GemCell Plus Xeno-Free) delivered via the trademarked Aseptic Assurance System using cryo-bag closed-system manufacturing, other animal sera, T-cell media, supplements, reagents, and hundreds of growth factors and cytokines. Process Liquid Solutions provides cGMP custom buffer manufacturing, custom media hydration, and private-label contract manufacturing for life science tools manufacturers, with batch sizes from 10-liters to 10,000-liters under TrueCustom and ExpressCustom service models (the latter delivering 7–10 day feasibility and 8–10 week lead times). In February 2026, GeminiBio launched aiMOS in collaboration with Tolemy Bio, an AI-enabled media optimization service that uses multi-omics data to design custom cell therapy media supplements.

GeminiBio monetizes through one-time catalog sales (e-commerce storefront at store.geminibio.com and direct US/international sales teams), multi-year contract manufacturing agreements with defined SLAs, and quote-based pricing for custom and private-label products with Net 30 payment terms. The company serves five segments: Research, BioPharma, Gene Therapy, Cell Therapy, and Life Science Tools Manufacturers, with named customers including multi-billion-dollar global bioprocess tools companies and clinical-stage cell therapy developers in the US, EU, Southeast Asia, the Middle East, and APAC. The go-to-market combines enterprise field sales, an e-commerce storefront for SMB and individual researchers, and channel partnerships with life science tools manufacturers who private-label GeminiBio's cGMP process liquids for their end customers.

Name

Gemini Bio-Products

Legal name

Gemini BioProducts, LLC

Website

https://geminibio.com

Company type

Private

Founded year

1985

Operating status

Operating

Headcount range

51–100 employees

Short description

Gemini Bio-Products is a privately held, FDA-registered cGMP manufacturer founded in 1985 that produces cell culture products (FBS, human AB serum, media, growth factors) and custom process liquids for research, cell/gene therapy, and life science tools manufacturers worldwide from two segregated facilities in West Sacramento.

Ownership category

akta.pro rank

Product category

Cell Culture & Bioprocessing Solutions

NAICS

Biological Product (except Diagnostic) Manufacturing (325414)

SIC

Biological Products, (No Disgnostic Substances) (2836)

akta.pro primary industry

mRNA & Nucleic Acid Manufacturing Services (mRNA/saRNA/Plasmid DNA) (HLAGAGAC)

Keywords

• Cell culture media
• Fetal bovine serum
• Bioprocessing solutions
• Process liquid manufacturing
• Contract manufacturing

Headquarters

HQ city

West Sacramento

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. Cell Culture Products: Sale of sera (fetal bovine serum, human serum, other animal sera), cell culture media, supplements, reagents, growth factors, cytokines, and lab consumables. Products sold through catalog offerings and custom formulations.
2. Custom cGMP Manufacturing Services: Contract manufacturing of cGMP process liquids including custom buffers, media, and other process liquids in batch sizes from 10-liters to 10,000-liters. Includes private-label manufacturing for life science tools manufacturers.
3. Process Liquid Solutions: High purity water (WFI quality), buffers, and other process liquids manufactured under cGMP conditions. Products include GemPure brand waters and custom manufactured solutions.
4. Contract Manufacturing Agreements: Long-term supply and manufacturing agreements with defined SLAs for process liquid products. Includes stability study services and validation support.

Pricing tiers

Go-to-market motion2 records

Distribution channels5 records

Marketing channels7 records

Core offering

Gemini Bio-Products (GeminiBio) manufactures and supplies cell culture products and cGMP process liquid solutions to the global biotechnology industry. The company offers a catalog of sera (fetal bovine serum, human AB serum, other animal sera), cell culture media, supplements, growth factors, cytokines, lab consumables, and high-purity waters under its GemPure brand. It also provides cGMP custom buffer manufacturing, custom media hydration, and contract/private-label manufacturing for life science tools manufacturers in batch sizes ranging from 10 liters to 10,000 liters.

Product overview

GeminiBio is a cell culture and process liquid solutions provider offering a comprehensive portfolio of products organized into two core verticals: Cell Culture Solutions and Process Liquid Solutions. The Cell Culture Solutions vertical includes GemPure™ water products, fetal bovine serum (FBS) in multiple grades (Premium, Stasis™, Foundation™, BenchMark™, GemCell™), human serum products (GemCell™ Plus Xeno-Free with Aseptic Assurance System®), other animal sera, cell culture media (Yssel's T-Cell Media), cell culture supplements and reagents (albumins, insulin, NeuroPlex™ supplements), and hundreds of growth factors and cytokines in research, animal-free, and cGMP grades. The Process Liquid Solutions vertical encompasses custom buffer manufacturing, custom media hydration, and contract manufacturing services in cGMP batch sizes from 10-liters to 10,000-liters. The company recently launched aiMOS™, an AI-enabled media optimization service developed with Tolemy Bio that uses multi-omics data to design custom media supplements for cell therapy manufacturing. GeminiBio serves Research, BioPharma, Gene Therapy, Cell Therapy, and Life Science Tools Manufacturers markets.

Differentiator

Problem solved

Functional benefit

Brands

• GemCell: Human serum and biological products brand including GemCell Plus Xeno-Free, GemCell U.S. Origin, and other serum products.
• GemPure
• GeminiBio FBS Brands
• HABS
• Aseptic Assurance System

Products and services

• GemPure Water Products GemPure brand high-purity water products including Cell and Molecular Grade Water, Purified Water, Water for Injection (WFI) Quality Water, and Water for Irrigation (WFIr) Quality Water in various packaging formats from 1L bottles to 200L BPC.
• Fetal Bovine Serum (FBS) Comprehensive line of fetal bovine serum products including Premium, Premium Select, Optima grades, and specialized variants such as Tetracycline Negative, Stem Cell Qualified (Stasis), Foundation B, Foundation, BenchMark, GemCell U.S. Origin, AbSolute Low-IgG, and Charcoal/Dextran Stripped.
• Human Serum (GemCell) Human AB serum products for cell therapy including Research Grade, Clinical Grade Off-the-Clot, and Clinical Grade GemCell Plus Xeno-Free (World Grade) options with Aseptic Assurance System packaging in bottles or cryo-bags.
• Other Sera Additional animal sera including Donor Horse Serum, Bovine Calf Serum, Newborn Calf Serum, Rabbit Serum, and Adult Bovine Serum from U.S. origin.
• Cell Culture Media Cell culture media products including Yssel's Serum Free T-Cell Medium available in Xeno-Free variants with or without Phenol Red for T-cell and therapeutic cell manufacturing applications.
• Cell Culture Supplements and Reagents Cell culture supplements including Human Serum Albumin (HSA), Human Recombinant Insulin, Bovine Insulin, NeuroPlex supplements (G5, N2, Gem21), albumins (HSA, BSA), antibiotics (Blasticidin, Ampicillin, Puromycin, Hygromycin B), available in powder and solution formats.
• Growth Factors and Cytokines Hundreds of growth factors and cytokines for research, animal-free, and cGMP applications from human, mouse, rat, porcine, canine, equine, and other species, developed in E. coli with >95% purity and low endotoxin levels.
• Lab Equipment, Consumables and Reagents Laboratory supplies including FroggaBio equipment, syringe filters, 96-well plates, PCR tubes, microcentrifuge tubes, serological pipettes, pipette tips, Taq DNA polymerase, and microscope slides.
• Custom Buffer Manufacturing cGMP custom buffer manufacturing in batch sizes from 10 liters to 10,000 liters with TrueCustom and ExpressCustom service models, including custom formulations, component specifications, and release criteria development.
• Custom Media Hydration Media hydration services for biopharma and cell therapy customers supporting upstream and downstream workflows with cGMP manufacturing in batch sizes from 10 liters to 10,000 liters.
• Contract Manufacturing (Private Label) cGMP process liquid contract manufacturing services for life science tools manufacturers with ability to fill into diverse container types from 500 mL bottles to 1,000-liter pallet tanks.
• aiMOS AI-Enabled Media Optimization Service AI-enabled media optimization service that uses artificial intelligence and multi-omics data (genomics, proteomics, metabolomics) to design custom media supplements for cell therapy manufacturing, improving performance, consistency, and reducing costs.

Quantifiable outcome

• 10-day feasibility and custom product proposal turnaround for custom buffers
• +3 more outcomes

Named customers10 records

Segments1 record

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability4 records

Feature5 records

Partnerships

Two partnerships are on record, tiered core and minor.

• Tolemy BiocoreStrategic or Co-development Partner · 10 February 2026Launch of aiMOS, the first AI-enabled media optimization service for cell therapy manufacturing. The technology leverages AI and multi-omics data to optimize media supplements, improving cell therapy performance, reducing costs, and supporting scaling from research to commercialization.
• Compliance Insight, Inc.minorStrategic or Co-development PartnerCollaboration with Compliance Insight, a nationally recognized compliance firm serving FDA-regulated industries, to release a whitepaper on regulatory and supply chain considerations for human AB serum in cell therapy development and manufacturing.

Scale indicators5 records

Recent moves7 records

Expansion highlights6 records

Broad incumbents

• Cytiva: Global bioprocess solutions provider offering cell culture media, buffers, single-use technologies, and process development services; competes with GeminiBio's process liquid and custom buffer manufacturing across all scale ranges.
• Sartorius: Bioprocess solutions provider offering cell culture media, buffers, filtration, and fermentation systems; overlaps with GeminiBio's process liquid and cell therapy manufacturing solutions.
• Merck KGaA (MilliporeSigma): Life science tools and bioprocess solutions business offering cell culture media, buffers, single-use systems, and biopharma services; directly competes with GeminiBio's process liquid solutions and custom cGMP manufacturing offerings.
• Thermo Fisher Scientific (Gibco): Largest life science tools company with the Gibco brand for cell culture media, sera, and reagents; directly competes with GeminiBio's FBS, cell culture media, and process liquid portfolio with far greater scale and distribution.

Direct peers

• Avantor: Supplier of high-purity process liquids, buffers, and bioprocess solutions to biopharma manufacturers; directly competes with GeminiBio's GemPure water products and custom buffer manufacturing services.
• Bio-Techne: Life science reagents and cell culture products company offering cytokines, growth factors, and cell culture media; directly overlaps with GeminiBio's growth factors/cytokines and cell culture media lines and acquired Atlanta Biologicals for FBS.
• BioIVT: Supplier of biological specimens and research services to life science researchers; comparable to GeminiBio's research-facing cell culture product portfolio and share leadership ties (former BioIVT CEO Jeffrey Gatz joined GeminiBio's board).
• FUJIFILM Irvine Scientific: Cell culture media and sera supplier for biopharma, cell therapy, and IVF applications; competes directly with GeminiBio's cell culture media, FBS, and process liquid offerings across research, clinical, and cGMP grades.
• Peak Serum: Specialty FBS and cell culture sera supplier; directly competes with GeminiBio's FBS product line including Premium, Foundation, and specialty FBS variants.
• Valley Biomedical: Specialty human and animal serum supplier for cell therapy, regenerative medicine, and biopharma applications; directly competes with GeminiBio's GemCell human serum and other sera product lines.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/GemBio
• Xx.com/gembio

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 records

Funding overview

Funding rounds1 record

Investors1 record

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

M&A1 record

Investments

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

Frequently asked questions about Gemini Bio-Products