On November 10, 2026, TSMC's board approved two investments of up to $500 million each: subscribing to Anthropic shares at its IPO price, and subscribing to preferred stock of OpenAI Group. The resolutions were filed with the US Securities and Exchange Commission the same day on Form 6-K. Both figures are ceilings, not completed deals — but a chip foundry betting on the world's two most-watched model companies at once sends a clear signal: the biggest beneficiary of AI compute demand is starting to own a piece of the source of that demand.
What each sum buys
The Anthropic investment has a clear target: TSMC Partners is one of seven strategic placement buyers named in Anthropic's prospectus, alongside Google, Nvidia, AMD, Broadcom, Micron, and Microsoft, subscribing to $26 billion of nonvoting Class N shares at the IPO price. At the $74 midpoint, TSMC's roughly $500 million corresponds to 6,756,756 shares. Anthropic's offering is priced at $70 to $78 per share, covering 825 million Class A shares, with pricing expected on November 18 and Nasdaq trading under the ticker ANT from November 19. On November 11, the Financial Times reported that first-day roadshow orders already covered the entire offering, that bankers plan to price above the range, lifting the valuation back above $1.5 trillion, and that proceeds could exceed $100 billion. The OpenAI investment carries no public price or round: the resolution only says "preferred stock, up to $500 million." According to Bloomberg on November 6, OpenAI has already taken in about $11 billion in its current round at a $1.25 trillion valuation, with the total possibly reaching $20 billion.
More than two investments: $40.9 billion of capacity spending behind them
The same board meeting approved about $40.93 billion in capital appropriations for long-term capacity planning, covering advanced processes, advanced packaging, mature-process capacity, fab construction, and 2027 R&D spending; raised the quarterly cash dividend from NT$7.0 to NT$9.0 per share; and approved another $500 million to set up a strategic investment company. Taken together, TSMC's logic runs on two tracks: expand capacity to capture AI compute orders, and take stakes in the buyers to lock in demand. The irony is that Anthropic's own prospectus lists TSMC as a chip-supply concentration risk — the chip seller has become a buyer, while the buyer depends on the seller's capacity.
For the market, two dates matter next: November 18, when Anthropic's final pricing will show whether it can clear the top of the $78 range; and the final size and terms of OpenAI's current round. Two $500 million checks are not large, but they tie chips, models, and capital together in one knot. Anthropic's IPO pricing was sent to banks, then withdrawn: the $70–80 issue price no longer stands told the story of this IPO's pricing twists and turns; the plot now is that the price is not yet set, and the buyers are already queuing up.
