TSMC Approves Up to $1 Billion for Anthropic and OpenAI

Taiwan Semiconductor Manufacturing Company, the world's largest contract chipmaker, has approved up to $1 billion in stakes in the two most watched AI labs in the world: up to $500 million in Anthropic and up to $500 million in OpenAI. The approvals came from TSMC's board meeting on 10 November 2026, and they arrive on the same day Anthropic filed the latest amendment to its IPO prospectus, pricing 825 million shares at $70 to $78 each on Nasdaq under the ticker ANT. A preferred stock is a class of shares that typically ranks ahead of common stock for dividends and in a liquidation, but usually carries limited or no voting rights. This is an approval of ceilings, not a completed purchase, and the distinction matters: TSMC has authorised itself to invest up to those amounts, not confirmed that the money has moved.

What TSMC's board actually approved

TSMC's board resolutions, disclosed in a 6-K filing with the US Securities and Exchange Commission on 10 November 2026, approved two separate caps. The first allows TSMC to subscribe for up to $500 million of Anthropic PBC common shares at the per-share IPO price. The second allows up to $500 million of OpenAI Group PBC preferred stock. Together the two caps create a combined ceiling of up to $1 billion: a maximum authorised amount, split evenly between the two labs. The same board meeting also approved about $40.93 billion in capital appropriations for new capacity, and a separate company for strategic investments with a cap of up to $500 million. That third $500 million is a different item entirely, and it is not part of the $1 billion headline figure, so it should not be added to it.

Anthropic's IPO: the numbers at $70 to $78

Anthropic's Amendment No. 2 to its Form S-1, filed on 10 November 2026, sets the offering at 825 million Class A shares priced at $70 to $78 each. At the top of the range, the offering raises $64.35 billion, a figure widely reported as $64.4 billion. At the midpoint of about $74, it raises roughly $61 billion. The valuation implied by the filing is about $1.02 trillion on a non-diluted basis at the top of the range, rising to up to about $1.4 trillion on a fully diluted basis at $78. At the midpoint, the fully diluted valuation is about $1.33 trillion. One figure that should not be used is $69.3 billion: that came from a withdrawn draft prospectus covering 867 million shares at $70 to $80, which Anthropic said was inaccurate.

Figure	At $70 (low)	At $74 (midpoint)	At $78 (high)
Shares offered	825 million	825 million	825 million
Total raise	$57.75 billion	About $61 billion	$64.35 billion
Valuation (fully diluted)	Not stated	About $1.33 trillion	Up to about $1.4 trillion
Anthropic's own shares	About 801.4 million	About 801.4 million	About 801.4 million
TSMC private-placement shares	6,756,756	6,756,756	6,756,756

Anthropic itself is selling about 801.4 million of the 825 million shares, which is worth about $62.5 billion at $78, while about 23.6 million shares come from existing holders. The underwriters also have a 30-day option to buy up to 123.75 million additional shares. Pricing and trading dates are reported, not stated in the filing: CNBC reported that pricing is expected on 18 November and trading on 19 November, so those dates should be treated as reported, not confirmed by Anthropic. Our earlier Anthropic IPO filing coverage set out the first filing; the amended prospectus now sets the terms.

The $26 billion private placement

Alongside the public offering, Anthropic has lined up a concurrent private placement worth an aggregate $26.0 billion of non-voting Class N stock, priced at the IPO price and contingent on the IPO going ahead. Seven buyers are named in the filing: AMD, Broadcom, Google, Micron, Microsoft, Nvidia, and TSMC Partners. The Class N shares carry no voting rights, which means these buyers are buying economic exposure rather than control. TSMC's share of the placement is 6,756,756 shares, worth about $500 million at the $74 midpoint, which lines up neatly with the $500 million cap its board approved for Anthropic. The placement shows Anthropic's own suppliers becoming its shareholders. The placement is attributed to the S-1 filing itself, and it only completes if the IPO completes.

Engineers in white protective suits working in a semiconductor fabrication clean room

The OpenAI leg: what is known, and what is not

The OpenAI half of TSMC's approval is far thinner on detail. The TSMC release approves up to $500 million of OpenAI Group PBC preferred stock, but it gives no price, no share count, no round, and no timetable. None of those details should be invented or inferred. OpenAI is a private company with no public IPO filing of its own, so there is no equivalent of Anthropic's S-1 to anchor the numbers. What is known is the structure: preferred stock, which would give TSMC a senior claim on dividends and assets ahead of common shareholders. The symmetry of the two caps is the story here: TSMC is treating the two leading labs as equally worth a half-billion-dollar option, even though only one of them has public pricing to attach the stake to.

Why a chipmaker is buying into its customers

TSMC does not build AI models; it builds the chips that train and run them. Its largest customers include the companies that buy the most advanced AI accelerators, and its order book is tied to how much those customers keep spending on compute. Taking a stake in the two labs that drive much of that demand is a way of aligning TSMC's interests with theirs, and it follows a pattern seen across the industry this year. The most comparable recent deal is the NVIDIA $3 billion Meta investment, where a chipmaker took a direct financial stake in a major customer. The difference is scale: Nvidia's Meta stake is a single, larger commitment, while TSMC is spreading up to $1 billion across two labs. Every large AI investment now gets read through the same question we asked when we examined whether is the AI bubble bursting: are these stakes a bet on real demand, or circular financing in which chipmakers fund the labs that buy their chips? The timing also matters. Anthropic's IPO is days away from pricing, and the private placement locks in chip suppliers as shareholders before the stock starts trading. For TSMC, whose $40.93 billion of capital appropriations approved at the same meeting shows how much it is spending to expand capacity, the stakes are a small but strategic hedge on the demand side of its own business.

Macro close-up of a silicon wafer with a grid of microchips held by a gloved hand

What happens next

The next milestone is Anthropic's pricing, reported for 18 November, followed by trading on 19 November under the ticker ANT. At that point the $500 million TSMC cap for Anthropic converts into a concrete shareholding at the IPO price, and the $26 billion private placement either closes or falls away with the offering. The OpenAI leg has no public timetable, so the only thing to watch for is a further TSMC disclosure or an OpenAI announcement that confirms terms. The numbers to remember are the caps themselves: up to $500 million in each lab, up to $1 billion combined, approved but not yet spent. The $40.93 billion in capital appropriations approved at the same meeting is a reminder of where TSMC's real spending goes: into fabs, not into stakes in its customers.

A modern chip fabrication plant exterior at dusk with illuminated glass and steel

Key Takeaways

TSMC's board approved up to $500 million in Anthropic and up to $500 million in OpenAI on 10 November 2026 — a combined ceiling of up to $1 billion, approved but not yet spent.
Anthropic's IPO prices 825 million shares at $70 to $78, raising up to $64.35 billion and valuing the company at up to about $1.4 trillion fully diluted.
A verified $26 billion private placement of non-voting Class N stock brings in AMD, Broadcom, Google, Micron, Microsoft, Nvidia, and TSMC Partners, contingent on the IPO.
TSMC's private-placement share is 6,756,756 shares, worth about $500 million at the $74 midpoint, matching its Anthropic cap.
The OpenAI leg has no disclosed price, share count, round, or timetable; the reported pricing date is 18 November and trading on 19 November.

Conclusion

TSMC's approval of up to $1 billion across Anthropic and OpenAI is a measured move, not a spending spree: two $500 million ceilings, one anchored to a public IPO price and one still without terms. The Anthropic numbers are now concrete: 825 million shares, $70 to $78, up to $64.35 billion raised, and a $26 billion private placement. The OpenAI side remains an option, not a deal. Watch 18 and 19 November, when Anthropic prices and starts trading, to see whether the market agrees with the value TSMC and the other buyers have put on it.

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