Portugal-based Graphenest developed a novel method for large production of high quality graphene nanoplatelets and their functional derivatives from natural graphite.

Grahpenest is currently producing and selling graphene flakes (GNPS) of various qualities.

Graphensic was established in November 2011 in Sweden is a spin-off from the Linköping University. The company aims to produce single layer graphene on hexagonal silicon carbide for the electronic equipment market, and related markets.

Established in 2016 in Canada, Graphite Innovation & Technologies (GIT) is an R&D Company that develops and produces high quality graphene flakes (GNPs). GIT also develops advanced engineered materials customized for specific applications and technologies.

Graphitene, established in 2013 in the UK, produces graphite compounds, graphene and graphene oxide in lab-scale in collaboration with NTNU in Norway and Cambridge University in the UK.

In 2015 the company's small-scale manufacturing plant in the UK commenced production. The company is also engaged in various graphite and graphene R&D projects.

Grolltex (short for ‘graphene-rolling-technologies’) is an advanced materials and equipment company located in San Diego, California. Its core business is creating products based on single layer, CVD generated graphene of the highest quality.

Haydale Graphene Industries Plc is the holding company for Haydale Limited, Haydale Composite Solutions Limited and Haydale Technologies (Korea) Co., Limited.

Haydale Limited, housed in a purpose built facility for processing and handling nano-materials with an R&D laboratory, is facilitating the application of graphenes and other nano-materials in fields such as inks, sensors, energy storage, photovoltaics, composites, paints and coatings. Haydale has developed a patented proprietary scalable plasma process to functionalise graphene and other nanomaterials.

Hazer Group is an early stage technology development company undertaking the commercialization of the Hazer Process, a low-emission hydrogen and graphite production process. The Hazer Process was developed by researchers at The University of Western Australia (UWA), before the IP were assigned to Hazer for further commercial development.

India-based Hexorp produces graphene materials for industrial markets that uses its own propreitary method that results in high-purity materials.

Hexorp currently offers few-layer graphene flakes powder, and is also developing other materials including Graphene Oxide and graphene composites.

Established in 2016, China-based Highbery Nano New Material Technology developed graphene-enhanced polymers, with a focus on graphene-nylon fibers.

It seems as if Highbery is no longer in business.

HQ Graphene is a nanotechnology company, specialized in the production and characterization of two-dimensional crystals like hexagonal boron nitride, high quality single crystal graphene, single large size crystals of sulphides, tellurides and more.

HydroGraph Clean Power is a Canada-based private company that was formed in 2017 to fund and commercialize green, cost-effective processes to manufacture graphene, hydrogen and other strategic materials in bulk, and to create customized graphene solutions for specific applications.

HydroGraph has received an exclusive worldwide license from Kansas State University to commercialize their patented detonation process to produce graphene and by extension, hydrogen gas. The Company has invested heavily into digitizing, automating and commercializing this production technology.

Hygraner is an Italy-based startup that was established in 2016 with an aim to produce graphene-based materials.

The company main products are based on recycled PET fibers and polypropylene fibers, both enhanced with graphene. The company also offer fabrics made from its fiber materials and other graphene-based materials.

Incubation Alliance was established in 2007 in Kobe, Japan to manufacture and sale carbon materials. The company is offering so-called Graphene Flower materials: substrate-free and catalyst-free multi layer graphene material made by direct synthesis.

JMC (originally the Jeil Moolsan Company), owned by the KISCO group, produces fine chemical products, such as reactive dyes, medicinal intermediates, electronics, plastics, and agriculture. JMC is also a large-scale producer of the artificial sweetener Saccharin.

KennedyLabs, based in Canada and spun off from the National Research Council in Canada, is a boutique material maker that produces graphene sheets (CVD), graphene oxide and graphene inks. The company is also producing other 2D materials (i.e. hBN) and it

Knano (the full name is Xiamen Knano Graphene Technology Co) specializes in graphene R&D, production and sales.

Knano holds more than 40 patents and develops graphene for several applications - including energy storage, composites, coatings and more. Knano's graphene flake production capacity is a few dozens of tons per year, and it is building a 250 tons per year (graphene and graphene-based materials) facility.

KNV's was established in 2010 by the Sharma family, to manufacture construction and flame retardant chemicals. The company expanded into graphene production in 2015.

KNV currently produces 1-3 layer graphene flakes in bulk for both research and industrial applications. The company sells graphene and graphene oxide, as well as graphene-enhanced inks.