Macronix America, Inc. is the U.S. subsidiary of Macronix International Co., Ltd. (TWSE: 2337), a Taiwanese non-volatile memory (NVM) maker founded December 1989 and headquartered in the Hsinchu Science Park, Taiwan. Macronix America is based at 680 N. McCarthy Blvd., Milpitas, California, and its stated function in company filings is marketing/distribution of Macronix products for the U.S. market. The parent is publicly listed in Taiwan (IPO March 1995; common tickers "MXIC"), not a subsidiary of a larger group. Third-party data puts the parent at roughly 4,300–5,500 employees and TTM revenue in the $1.3–1.5 billion range (PitchBook, FT, GlobalData); figures vary by source and reporting date.
Products / operations. Macronix is an integrated device manufacturer (IDM) that designs, fabricates and tests its own memory: NOR Flash (serial/parallel, OctaBus, wide-Vcc, 1.2V), NAND Flash (SLC and serial NAND), Mask ROM, e.MMC, and specialty lines such as ArmorFlash (security/authentication) and LybraFlash. It also sells wafer foundry services and operates 8-inch (Fab 2) and 12-inch (Fab 5) fabs in Hsinchu. End markets include consumer, communications, computing, networking, industrial and automotive (automotive = ~24% of NOR revenue per the 2023 annual report). It reports being the top worldwide Mask ROM supplier and among the leading NOR Flash vendors.
Litigation posture. Macronix America is an operating-company plaintiff, not an NPE. In the tracked data it appears in 2 cases, both as plaintiff and both at the U.S. International Trade Commission under Section 337 — zero defendant cases (ITC §337 actions target imported infringing goods rather than damages venues like E.D. Tex., so no district-court clustering is reflected here).
Notable cases. (1) Macronix International Co., Ltd. et al. v. Spansion, Inc. et al. (filed 2013-12-27, ITC Inv. No. 337-TA-922), concerning flash memory patents. (2) Macronix International Co., Ltd. et al. v. Toshiba Corporation et al. (filed 2017-03-07, ITC Inv. No. 337-TA-1046), asserting NVM/3D NAND-related patents. Both were competitor-vs-competitor memory disputes; Macronix is a repeat enforcer of its own large patent portfolio (9,203 patents obtained worldwide as of end-2023).