It is the world's most valuable semiconductor company, the world's largest dedicated independent (pure-play) semiconductor foundry, and one of Taiwan's largest companies, with its headquarters and main operations located in the Hsinchu Science Park in Hsinchu. It is majority owned by foreign investors.

TSMC has a global capacity of about thirteen million 300 mm-equivalent wafers per year as of 2020, and makes chips for customers with process nodes from 2 microns to 5 nanometres. TSMC is the first foundry to provide 7-nanometre and 5-nanometre (used by the 2020 Apple A14 and M1 SoC) production capabilities, and the first to commercialize extreme ultraviolet (EUV) lithography technology in high volume.

(WOWTIMES) TSMS’s history and achievements

• 1987: TSMC pioneered the pure-play foundry business model when it was founded in 1987, and has been the world’s leading dedicated semiconductor foundry ever since.
• 1991: After starting as a six-inch, 2-micron wafer-processing fabrication facility, or fab, it broke the 1-micron barrier in 1991.
• 1992: TSMC was rated as the world’s top silicon foundry, producing chips for other companies.
• 1994: TSMC went public on the Taiwan Stock Exchange.
• 1996: TSMC became the first Taiwanese company to be listed on the New York Stock Exchange when it raised more than $500 million through the sale of 305 million ADR (American depository receipt) shares.
• 2000: TSMC mergered with WSMC and TI-Acer
• 2000s: TSMC opened various of fabrication plants
• 2020: officials in Phoenix, Arizona in the United States approved TSMC's plan to build a $12 billion chip plant in the city.  The facility may be tripled to roughly a $35 billion investment with six factories.
• 2021: TSMC and Sony announced that TSMC would be establishing a new subsidiary named Japan Advanced Semiconductor Manufacturing (JASM) in Kumamoto, Japan. The new subsidiary will manufacture 22 and 28 nanometer processes.

Apart from its main base of operations in Hsinchu in Northern Taiwan, where several of its fab facilities are located, it also has leading-edge fabs in Southern Taiwan and Central Taiwan, with other fabs located at its subsidiaries TSMC China in Shanghai, China, WaferTech in Washington state, United States, and SSMC in Singapore, and it has offices in China, Europe, India, Japan, North America, and South Korea.

According to Wikipedia