TSMC Anthropic OpenAI investment: board approves up to $1bn in stakes in the two AI developers

Taiwan Semiconductor Manufacturing Company (TSMC) has approved spending of up to $1 billion on stakes in two of the best-known artificial intelligence developers. At a meeting on 10 November 2026, its board authorised up to US$500 million to buy Anthropic common shares at the company's initial public offering price, and up to US$500 million to buy preferred stock in OpenAI, according to TSMC's own summary of the board resolutions.

The TSMC Anthropic OpenAI investment was one line in a long list of routine board business, and the company gave no explanation for it. This article sets out what is confirmed, what is not, and how the sums compare with the rest of TSMC's spending. It is news reporting only and is not investment advice.

What exactly did TSMC's board approve?

The resolutions were published by TSMC on 10 November 2026 and filed with the US Securities and Exchange Commission in a Form 6-K signed by Wendell Huang, the senior vice president and chief financial officer.

The resolution covering the two AI companies has two parts:

• Anthropic: an investment in Anthropic, PBC "at its per share initial public offering price", capped at US$500 million, to buy common shares.
• OpenAI: an investment in OpenAI Group PBC, capped at US$500 million, to buy preferred stock.

Both figures are ceilings, not confirmed purchases. The wording is "not to exceed", so the amount TSMC ends up investing could be lower.

A separate resolution approved up to US$500 million to set up an investment company that will make strategic investments in the semiconductor industry and its related ecosystem. That vehicle is distinct from the Anthropic and OpenAI stakes.

Resolution on 10 November 2026	Amount
Anthropic common shares, at the IPO price	Up to US$500 million
OpenAI preferred stock	Up to US$500 million
New investment company for semiconductor ecosystem investments	Up to US$500 million
Capital appropriations (capacity, fab construction, 2027 R&D and sustaining spending)	About US$40,926.70 million
Cash dividend for the third quarter of 2026	NT$9.0 per share

How does this connect to Anthropic's IPO?

The timing lines up with Anthropic's stock market listing. On the same day as TSMC's board meeting, Anthropic said in an updated filing that it will offer 825 million shares at between $70 and $78 each, and that it plans to list on Nasdaq under the ticker "ANT", as CNBC reported.

According to CNBC's account of that filing, Anthropic has also agreed to sell $26 billion of Class N common stock in a private placement, at the IPO price, to a group of technology and chip companies: AMD, Broadcom, Google, Micron, Microsoft, Nvidia and TSMC. Those shares are not part of the registered public offering and, according to the company, will not be subject to underwriter lock-up agreements.

CNBC calculated that the top of the price range would raise up to $64.35 billion and imply a fully diluted valuation of about $1.405 trillion. People familiar with the details told CNBC that pricing is planned for 18 November 2026, with trading starting on 19 November 2026. UPI also reported the $70 to $78 range, the 825 million shares and the 18 November pricing date.

The final price has not been set. Because TSMC's approval is tied to the IPO price and capped in dollars, the number of Anthropic shares it would receive is not yet known.

What do we know about the OpenAI stake?

Much less. TSMC's resolution names the entity (OpenAI Group PBC), the type of security (preferred stock) and the cap (US$500 million). It gives no price, no funding round, no share count and no timetable.

Investment Monitor, in a report carried by Yahoo Finance on 11 November 2026, said both investments remain subject to the terms of the respective share offerings.

We could not find a statement from OpenAI or Anthropic about TSMC's decision, and TSMC's release does not say why the board chose these two companies.

How big is $1 billion for TSMC?

Small, by its own standards. The same board meeting approved capital appropriations of about US$40.93 billion for advanced technology and packaging capacity, fab construction and 2027 research and sustaining spending.

TSMC's finances explain why. The board approved third-quarter 2026 accounts showing consolidated revenue of NT$1,494.24 billion and net income of NT$763.06 billion. Investment Monitor put that revenue at about $45.34 billion.

The company also reported on 10 November that October 2026 revenue was approximately NT$586.89 billion, up 59.7% on October 2025. Revenue for January to October 2026 was NT$4,485.62 billion, up 43.3% on the same period a year earlier.

Investing.com reported that TSMC shares rose more than 4% on Wednesday 11 November 2026, and said the gain followed the October sales data. The week before, chip stocks had fallen sharply, as we covered in our report on the AI chip sell-off.

Analysis: why would a chip foundry buy into AI labs?

This section is our own analysis, not a statement from any of the companies.

TSMC does not usually sell directly to AI model developers. It manufactures chips designed by other firms, and Investing.com describes it as the world's largest contract chipmaker and a supplier to major AI companies including Nvidia. Anthropic and OpenAI sit one step further down the chain: they are among the heaviest users of the processors TSMC's customers design.

Three points stand out.

1. The sums are modest in context. The combined $1 billion ceiling is roughly 2.4% of the capital appropriations approved at the same meeting. If TSMC takes its full US$500 million of Anthropic stock, that would be about 1.9% of the $26 billion private placement CNBC described. Those percentages are our arithmetic from the published figures.
2. TSMC is in familiar company. The other buyers named in Anthropic's placement, per CNBC, include chip designers and a memory maker whose products TSMC builds or works alongside. A supplier taking a small stake next to its customers looks more like a relationship gesture than a change of business model, although TSMC has not described it either way.
3. The new investment company may matter more over time. A standing vehicle for "strategic investments" in the semiconductor ecosystem gives TSMC a route to make further minority investments. The release does not say what it will buy.

What the filings do not show is any commercial agreement between TSMC and either AI company. Nothing published so far links the stakes to chip supply, pricing or capacity. Readers should treat claims of that kind as speculation unless a company confirms them.

For background on the products behind the two companies, see our explainer on what generative AI is.

What happens next?

• 18 to 19 November 2026: the dates CNBC's sources gave for Anthropic's IPO pricing and first day of trading. The final price will determine what TSMC pays per share.
• OpenAI terms: no timetable has been published for the preferred stock purchase.
• The investment company: TSMC has not said when it will be established or who will run it.

Sources

• TSMC: Board of Directors Meeting Resolutions, 10 November 2026
• US Securities and Exchange Commission: TSMC Form 6-K, board resolutions
• TSMC: October 2026 Revenue Report
• CNBC: Anthropic sets IPO price range of $70 to $78
• UPI: Anthropic stock to be priced in $70-78 range per share
• Yahoo Finance / Investment Monitor: TSMC plans up to $1bn investment in Anthropic, OpenAI
• Investing.com: TSMC board approves $1 bln investment in Anthropic, OpenAI; shares rise