MRAM related companies

Grandis, established in 2002 and headquartered in Silicon Valley, California, develops Spin Torque Transfer based RAM technology (STT-RAMTM). STT-RAMTM is a "second generation" magnetic random access memory (MRAM) which solves the writing current scaling problem for conventional MRAM.
In November 2002, Grandis announced a collaboration with Renesas.

Grandis web page 

In July 2006, Freescale became the first company to offer commercial MRAM modules (4 Mbit,25$). IP issues with NVE are still open.

Freescale's web site

Crocus is a new startup, headquartered in Grenoble (France) with operations in the Paris area and in Silicon Valley.
Crocus mission is to become the leading supplier of products and technologies to the MRAM market.
The MRAM technology that is the foundation on which Crocus is built was developed in the Grenoble-based Spintec research center and Crocus has formal joint development programs with Spintec and other leading European laboratories.
In June 2006, Crocus has raised 17M$

Crocus web page 

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.

NVE's web site