TSMC to invest up to $1B in Anthropic and OpenAI, $500M in each

Taiwan Semiconductor Manufacturing (TSM) plans to invest up to $1B in Anthropic (ANT) and OpenAI, split evenly between the two AI companies.

TSMC's board approved the plan on Tuesday. It covers up to $500M of Anthropic shares bought at the IPO price and up to $500M of OpenAI preferred stock.

The Anthropic shares come through a private placement alongside the IPO. TSMC's investment arm, TSMC Partners, is one of seven tech companies buying $26B of non-voting Class N shares at the IPO price.

Alphabet (GOOGL) and Nvidia (NVDA) are the largest buyers in that placement, with $10B each.

Anthropic plans to sell shares at $70 to $78 each. At the $74 midpoint, TSMC's money buys about 6.8M shares, or about 0.05% of the company.

At the top of the range, the 13.1B shares Anthropic will have outstanding after the IPO and the placement are worth about $1.02T. The $1.4T figure Reuters gives also counts options, RSUs and shares set aside for employee plans.

TSMC did not say at what price it will buy into OpenAI. OpenAI raised $11B at a $1.25T valuation on November 6, the first part of a round that could reach $20B.

Both companies depend on TSMC's chips. Anthropic's prospectus says most of the world's most advanced chipmaking capacity sits in Taiwan, mainly at TSMC. It adds that TSMC has at times been unable to meet demand, so Anthropic has not always been able to get enough chips.

TSMC's US-listed shares rose 2.0% on Tuesday, while the PHLX Semiconductor index fell 0.4%. In Taipei, the stock closed 4.8% higher on Wednesday, as the Taiwan Weighted Index gained 3.6%.

The Anthropic placement is set to close right after the IPO, and only if the offering goes ahead.

Sources & Further Reading

1. "TSMC Board of Directors Meeting Resolutions (Form 6-K)." Taiwan Semiconductor Manufacturing Company. November 10, 2026.
2. "TSMC to invest up to $1 billion in Anthropic, OpenAI." Reuters. November 10, 2026.
3. "Anthropic, PBC Amendment No. 2 to Form S-1." Anthropic. November 10, 2026.
4. "OpenAI gets $11 billion funding at $1.25 trillion valuation, source says." Reuters. November 6, 2026.