Advanced MicroSensors Corporation (AMS) is a semiconductor foundry, which develops and fabricates MEMS and spintronics solutions. AMS was founded in 1999 and is based in Massachusetts, USA.
Spintronics companies
Atomistix
Atomistix is a provider of software solutions for development of nanotechnology. Since its incorporation in Copenhagen (2003), the company has been working in close collaboration with the Nano-Science Center at the Niels Bohr Institute of Copenhagen University.
Crocus
Crocus is an early stage startup, headquartered in Grenoble (France) with operations in the Paris area and in Silicon Valley.
Everspin
EverSpin was spun-off Freescale in June 2008, to handle Freescale's MRAM development, and is now an independent company. EverSpin is the world's first and only MRAM producing company, offering MRAM and STT-MRAM chips.
Freescale

In July 2006, Freescale became the first company to offer commercial MRAM modules (4 Mbit,25$).
Grandis
Grandis, established in 2002 and headquartered in Silicon Valley, California, develops Spin Torque Transfer based RAM technology (STT-MRAM). STT-RAMTM is a "second generation" magnetic random access memory (MRAM) which solves the writing current scaling problem for conventional MRAM.
IBM corporation (SpinAps)
Established in 1910, IBM is one of the largest technology companies, operating as an information technology (IT) company worldwide.
Intel
Established in 1968, Intel is the world's leading chip maker. Intel is researching Spintronics, and is supporting several universites in their Spintronics research (In 2006, Intel gave 12M$ in research funds and equipment to several Californian universities).
Intel trades in the Nasdaq (ticker is INTC).
NVE corporation
NVE develops and sells devices (Sensors and couplers) using spintronics. NVE is also into MRAM research, and lists Motorola, Cypress and Agilent as licensees.
NVE trades in the NASDAQ (ticker is NVEC). You can follow the latest spintronics news from NVE here.
Organic Spintronics
Organic Spintronics was established in 2003 (spun off from CNR).
The company works on several research areas, one of them being spintronic materials and processes.
QuantumWise
QuantumWise is a provider of software solutions for development of nanotechnology. QuantumWise bought the assest of Atomistix after it went bankrupt in January 2009.
Rhomap
Rhomap was spun-off from Durham University in 2011 to develop manufacture-to-order scientific instrumentation for high precision magneto-transport measurement systems. Rhomap's instruments targets new materials and next generation semiconductors, photovoltaics, spintronics and ferromagnetic systems.
Rhomap's web site seems to be empty so it's not clear whether the company is still active.
Spindeco
Finland-based Spindeco Technologies developed a proprietary technology (called SpinX) which is based on the polarization of conduction electrons, which reduces dissipation in conductors and appliances. The technology reduces energy consumption, improves the efficiency and lowers the operating temperature.
Spintronics-Info
Spintronics-Info, based in Israel, is a web publication focused on Spintronics technologies. Spintronics-Info has been providing news and resources since 2006. The site is regularly read by industry professionals, researchers, system designers and consumers interested in next generation spintronics technologies.
Spintronics-Info is edited by Ron Mertens.