Anchor investor is the phrase that turned a routine Anthropic IPO update into a Reuters exclusive on Thursday night. At 23:00 UTC on 11 September 2026, Krystal Hu and Milana Vinn reported that Anthropic is in talks to bring Nvidia in as an anchor investor for what could be the largest initial public offering in history. Two people familiar with the matter said Anthropic is seeking to raise as much as $100 billion at a valuation of around $2 trillion. One of them said Nvidia is considering investing up to $10 billion.
Both numbers come with the same warning: “The plans remain under discussion and could change.” Anthropic declined to comment. Nvidia did not immediately respond. Nothing about the anchor investor role has been filed, and no artificial intelligence company has ever tried to sell $100 billion of stock in one offering, so the story is a report about a negotiation, not a term sheet.
We read the wire text as syndicated verbatim by AOL and MSN, Arm’s and Instacart’s 2023 prospectuses for what a US anchor investor actually signs, Nvidia’s 10-Q for the quarter ended 26 July 2026, Anthropic’s own Series G and Series H announcements, and the CNBC reporting on how Nvidia’s last mega cheque, the $100 billion OpenAI letter of intent, shrank to $30 billion. Together they answer the questions the 525-word wire leaves open: what an anchor investor commits to, what Nvidia already owns, where $10 billion sits on its balance sheet, and what has to happen in the 53 days between the report and the midterm elections.
Our report on the Anthropic IPO calendar slipping to mid-October covered the timetable. This one covers the money at the front of the book.
Table of contents
- What Reuters Reported About the Anchor Investor Talks
- What an Anchor Investor Actually Commits To
- The Anchor Investor Precedents Reuters Cited: Arm and SpaceX
- Nvidia Already Owns Part of Anthropic
- Where $10 Billion Sits on Nvidia’s Balance Sheet
- The OpenAI Precedent: How Nvidia’s Last Mega Cheque Shrank
- Why Anthropic Wants an Anchor Investor at All
- The Compute Ties Behind the Anchor Investor Role
- The Valuation an Anchor Investor Would Be Underwriting
- What Could Change Before an Anchor Investor Is Named
- What the Anchor Investor Story Means for Businesses Using Claude
- Frequently Asked Questions About the Anchor Investor Talks
- References and Further Reading
What Reuters Reported About the Anchor Investor Talks
The Reuters story is short, and almost every number in it is attributed to someone other than the two companies. That matters for a listing that has not yet published a prospectus, because the figures a reader will see repeated all week come from three different places: unnamed sources, prior Reuters reporting, and Anthropic’s own past statements.
Five numbers, three kinds of sourcing
The anchor investor talks are sourced to “two people familiar with the matter”. The $100 billion raise and the $2 trillion valuation are sourced to “the people”. The $10 billion is sourced to “one of the sources”. The revenue figures are attributed to Anthropic, and the 2028 projection to earlier Reuters reporting. Laid out, the story rests on the following.
| Figure in the story | Value | Who it is attributed to | Status |
|---|---|---|---|
| Nvidia as anchor investor | In talks | Two people familiar with the matter | Under discussion, could change |
| Size of the raise | Up to $100 billion | The same people | Not filed |
| Valuation | Around $2 trillion | The same people | Not filed |
| Nvidia’s cheque | Up to $10 billion | One of the sources | Under discussion |
| Series H | $65 billion at $965 billion post-money | Anthropic, 28 May 2026 | Announced |
| Run-rate revenue | Above $65 billion by end of July, from about $9 billion at end of 2025 | Anthropic | Company figure |
| 2028 revenue projection | $190 billion to $200 billion | Reuters, previously reported | Internal projection |
| US IPO proceeds to end of August | Record $137 billion, excluding SPACs | Dealogic | Market data |
The one sentence that explains why it is news
Reuters put the significance in a single clause: bringing “a deep-pocketed anchor investor like Nvidia onboard could boost investor confidence in the listing, which is shaping up to be a major test of public-market appetite for the enormous valuations and capital requirements of frontier AI labs.” An anchor investor is, in other words, insurance against the book coming up short. That is a different reason to want one than the usual “strategic alignment” language, and it tells you how the bankers see the risk.
What the story does not say
The wire does not say whether Nvidia would buy at the offer price or a discount, whether any lock-up would apply, whether the $10 billion is new money or a top-up of an existing holding, or who else is being asked to anchor. It also does not say when a decision is due. Every one of those gaps is normal for an IPO that is still weeks from a public filing, and every one of them is where the anchor investor arrangement will be judged once the prospectus lands.
What an Anchor Investor Actually Commits To
Reuters defines an anchor investor as an institution that commits “to buy a set portion of an IPO before it is marketed more broadly, providing an early vote of confidence in the shares.” In a US listing, that commitment is usually weaker than the word suggests. The prospectuses of the two most-cited recent examples spell out exactly how weak.
Arm’s prospectus: “not binding agreements or commitments to purchase”
Arm’s amended F-1 for its September 2023 Nasdaq listing named ten cornerstone investors: AMD, Apple, Cadence, Google, Intel, MediaTek, Nvidia, Samsung, Synopsys and TSMC. They “have, severally and not jointly, indicated an interest in purchasing up to an aggregate of $735 million” of the shares at the offer price. The next sentence is the one to remember: “Because these indications of interest are not binding agreements or commitments to purchase, any of the Cornerstone Investors may determine to purchase more, fewer, or no ADSs in this offering, or the underwriters may determine to sell more, fewer, or no ADSs to any of the Cornerstone Investors.”
Instacart’s S-1, filed a month earlier, used the same construction for Norges Bank Investment Management, TCV, Sequoia Capital, D1 Capital Partners and Valiant Capital Management, which had “indicated an interest, severally and not jointly, in purchasing shares of common stock in an aggregate amount of up to approximately $400 million”. Same non-binding language, same “up to”.
The anchor investor in Hong Kong is a different animal
The reason the word carries more weight than the US paperwork justifies is that it was borrowed from Asia. A Hong Kong cornerstone investor signs a binding placing agreement, is guaranteed its allocation even when the book is oversubscribed, and accepts a six-month lock-up, as Clifford Chance’s market-trends briefing on cornerstone investment sets out. A US anchor investor does none of those three things unless the parties agree to them privately, and the prospectus discloses only an indication of interest.
| Feature | US anchor investor (Arm, Instacart) | Hong Kong cornerstone investor | Pre-IPO strategic investor (Nvidia, Nov 2025) |
|---|---|---|---|
| Nature of commitment | Indication of interest, expressly non-binding | Binding placing agreement | Private financing agreement |
| Allocation | At the underwriters’ discretion, “more, fewer, or no” shares | Guaranteed for the committed amount | Negotiated stake |
| Price | Offer price, same terms as everyone | Offer price | Round valuation ($380 billion post-money for Series G) |
| Lock-up | None by default | Six months | Subject to the IPO lock-up like other holders |
| Disclosure | Named in the prospectus cover pages | Named in the prospectus with amounts | Announced by the companies |
| What it signals | Demand exists before the roadshow | Demand is contractually locked | Commercial partnership |
Why the distinction matters for a $100 billion book
For a $660 million Instacart offering, a non-binding $400 million indication is a courtesy. For a $100 billion Anthropic offering, a $10 billion anchor investor indication is a tenth of the book, and whether it is binding decides whether the underwriters can count it when they size the deal. Securities lawyers at Olshan note that indications of interest have to be planned and disclosed carefully to avoid a long SEC review, which is one reason the names tend to appear only in the public filing rather than in a press release. Expect the Anthropic prospectus, not a Reuters follow-up, to be where the anchor investor terms are finally written down.
The Anchor Investor Precedents Reuters Cited: Arm and SpaceX
Reuters gave two examples. “Chip designer Arm’s anchor investors included Nvidia and Amazon, while Saudi Arabia’s PIF was among SpaceX’s anchor investors.” One of those claims does not match the filing it refers to.
Arm: ten names in the prospectus, and Amazon is not one of them
Arm’s F-1 lists the ten cornerstone investors quoted above. Nvidia is there. Amazon is not, and the word Amazon appears in that filing only as a customer that ships Arm-based Graviton chips. Amazon may well have bought Arm shares in the offering, but it was not a disclosed cornerstone, so the sentence conflates a named anchor investor with an ordinary institutional buyer. It is a small slip in a story that otherwise hedges carefully, and it is worth flagging because the Arm precedent is the one every follow-up piece has copied.
SpaceX: a $5 billion anchor in a $75 billion deal
Reuters reported on 2 April 2026 that SpaceX wanted the Public Investment Fund to make “a roughly $5 billion anchor investment in the offering”, partly to prevent dilution of PIF’s existing stake of just under 1%. SpaceX then priced on 12 June at $135 a share, raising $75 billion at a $1.77 trillion valuation, per CNBC. A $5 billion anchor investor in a $75 billion book is 6.7% of the offering. Nvidia’s proposed $10 billion in a $100 billion book would be 10%.
Instacart: the anchor investor group that was most of the deal
The outlier is Instacart. Its five cornerstone investors indicated up to $400 million of a $660 million raise, which is 60.6% of the offering. That deal is the reminder that the anchor investor share is a choice, not a convention, and that a heavily anchored book can signal thin outside demand as easily as strong support. The chart below divides each anchor indication by the size of the offering it sat in.
| IPO | Anchor investor(s) | Indication | Offering | Binding? |
|---|---|---|---|---|
| Instacart, Sept 2023 | Norges Bank IM, TCV, Sequoia, D1, Valiant | Up to ~$400 million | $660 million | No, per the S-1 |
| Arm, Sept 2023 | AMD, Apple, Cadence, Google, Intel, MediaTek, Nvidia, Samsung, Synopsys, TSMC | Up to $735 million | $4.87 billion at $51 | No, per the F-1 |
| SpaceX, June 2026 | Saudi PIF among others | Roughly $5 billion, per Reuters in April | $75 billion at $135 | Not disclosed |
| Anthropic, planned | Nvidia, in talks | Up to $10 billion | Up to $100 billion | Unknown |
Nvidia Already Owns Part of Anthropic
The anchor investor talks are not Nvidia’s first cheque to Anthropic. They would be its second, and the first one has already been marked up several times.
The November 2025 partnership and the Series G
On 18 November 2025, Anthropic announced that “NVIDIA and Microsoft are committing to invest up to $10 billion and up to $5 billion respectively in Anthropic”, alongside a commitment by Anthropic to buy $30 billion of Azure compute and to contract up to one gigawatt of capacity on Nvidia Grace Blackwell and Vera Rubin systems. CNBC reported that the deal pushed Anthropic’s valuation to around $350 billion, from $183 billion in September. Jensen Huang called it “a dream come true for us” and “the first time we are going to deeply partner with Anthropic”.
The money landed in the Series G. Anthropic’s 12 February 2026 announcement of that $30 billion round at a $380 billion post-money valuation lists Microsoft and NVIDIA among the investors. CNBC reported on 4 September that Nvidia has since “finalized” the $10 billion Anthropic investment alongside its $30 billion OpenAI stake.
What the first $10 billion is worth now
If the full $10 billion went in at the Series G price, it bought roughly 2.63% of Anthropic ($10 billion divided by $380 billion). Ignoring dilution from the Series H and the IPO itself, that stake was worth about $25.4 billion at the $965 billion Series H valuation and would be worth about $52.6 billion at the $2 trillion figure Reuters’ sources describe. The chart uses those three marks and nothing else.
So the anchor investor cheque would buy 0.5% of the company at $2 trillion, and the existing stake it sits alongside is already several times the size of the new money. Reuters’ phrase “further deepening ties” undersells it. Nvidia would be adding to a position that has, on paper, quintupled in seven months.
Nvidia is not the only strategic holder
Amazon has invested $8 billion, then $5 billion in April 2026 with up to $20 billion more to follow, per Anthropic’s own announcement. Alphabet’s holding was the subject of our earlier report on the Google Anthropic investment. Microsoft’s up to $5 billion sits in the same Series G as Nvidia’s. An anchor investor at the IPO would be one more strategic name on a cap table that already carries Amazon, Google, Microsoft and Nvidia.
Where $10 Billion Sits on Nvidia's Balance Sheet
Nvidia’s 10-Q for the quarter ended 26 July 2026 was filed weeks before the Reuters story, so it says nothing about Anthropic’s IPO. It does say exactly how much room there is for another $10 billion, and how fast the investment portfolio has grown.
Liquidity, holdings and commitments
| 10-Q line, 26 July 2026 | Amount | $10 billion as a share |
|---|---|---|
| Cash, cash equivalents and marketable debt securities | $56.6 billion | 17.7% |
| Marketable equity securities (public holdings) | $42.8 billion | 23.4% |
| Non-marketable equity securities (private holdings) | $47.9 billion, from $3.8 billion a year earlier | 20.9% |
| Net additions to private holdings, first half of fiscal 2027 | $31.0 billion | 32.3% |
| Committed but unfunded equity investments | $25 billion, of which $18 billion in the rest of fiscal 2027 | 40.0% |
| Second-quarter revenue | $96.2 billion | 10.4% |
| Returned to shareholders in the quarter | About $26.0 billion | 38.5% |
| Long-term debt | $32.4 billion, from $7.5 billion in January | 30.9% |
The private-holdings line is the striking one. Non-marketable equity securities went from $3.8 billion to $47.9 billion in twelve months, a 12.6-fold rise, and the 10-Q says the company “committed to make certain equity investments in AI model makers, infrastructure financiers, and other private companies, subject to certain contingencies.” A $10 billion anchor investor commitment would be large by any company’s standard and ordinary by this one’s.
Kress’s “nearly $50 billion” and the arithmetic behind it
CNBC’s Kai Nicol-Schwarz reported on 4 September that Nvidia’s equity investments were valued at $99 billion as of 26 July, up from about $7 billion a year earlier, and quoted CFO Colette Kress telling analysts the company had invested “nearly $50 billion in the frontier AI labs.”
The two disclosed lab investments, $30 billion in OpenAI and $10 billion in Anthropic, add up to $40 billion, which leaves roughly $10 billion for the rest of the frontier, including the xAI round CNBC reported Nvidia joined before xAI merged with SpaceX. A further $10 billion in Anthropic would take the lab total to about $60 billion and Anthropic’s share of it to a third.
The quarter also shows how the money is being raised
The same filing records $24.9 billion of debt issued in the quarter, $19.7 billion of buybacks and $6.0 billion of dividends, with $99.0 billion still authorised for repurchases. Nvidia is simultaneously borrowing, buying back its own stock and buying stakes in its customers. Whether an anchor investor cheque comes out of the cash line, the debt line or a smaller buyback is a question the next 10-Q will answer, not this one.
The OpenAI Precedent: How Nvidia's Last Mega Cheque Shrank
The best guide to how a Nvidia anchor investor commitment might evolve is the one Nvidia made to Anthropic’s closest rival a year ago, because that one changed shape three times.
From $100 billion to “on ice” to $30 billion
In September 2025, Jensen Huang and Sam Altman announced on CNBC that Nvidia would invest up to $100 billion in OpenAI as it built out 10 gigawatts of Nvidia systems. It was a letter of intent. By November, Nvidia’s own risk factors warned: “There is no assurance that we will enter into definitive agreements with respect to the OpenAI opportunity or other potential investments.”
On 30 January 2026 the Wall Street Journal reported the talks were “on ice”. In February, Nvidia put $30 billion into OpenAI’s $110 billion round at an $852 billion post-money valuation. Huang said in March that $100 billion was probably “not in the cards” and that the $30 billion “might be the last time” Nvidia wrote a cheque before an IPO.
| Nvidia and the lab | OpenAI | Anthropic |
|---|---|---|
| Headline commitment | Up to $100 billion, Sept 2025 letter of intent | Up to $10 billion, Nov 2025 partnership |
| What was actually invested | $30 billion, Feb 2026, at $852 billion post-money | $10 billion, Series G, at $380 billion post-money |
| Implied stake at that round | About 3.5% | About 2.6% |
| Compute tied to the deal | 3 GW inference and 2 GW training on Vera Rubin, per Investing.com’s account of the round | $30 billion of Azure plus up to 1 GW on Grace Blackwell and Vera Rubin |
| Credit support | Guarantees capped at $105 billion for a 4.25 GW Ohio campus, per the 10-Q | None disclosed |
| IPO participation | Huang told CNBC in February Nvidia wants to take part | Anchor investor talks, up to $10 billion, per Reuters |
Why the circularity question follows every cheque
The OpenAI episode also produced the critique that will follow any Anthropic anchor investor announcement. Wedbush’s Matthew Bryson told CNBC in May that Nvidia’s investments fit “squarely into the circular investment theme” behind fears about the market’s durability. Mizuho’s Jordan Klein was blunter about the neocloud deals: “It smells like you are pre-funding the purchase of your own GPUs and products.” Huang’s answer, from an April podcast, was that “we try to invest in all of them. We don’t pick winners. We need to support everyone.”
An anchor investor cheque at an IPO is a cleaner transaction than a private round tied to a compute commitment, because the price is set by the public book and the shares are the same as everyone else’s. It still puts Nvidia’s capital behind a company whose Azure and Nscale contracts run on Nvidia silicon, and the 10-Q already notes that “one AI research and deployment company contributed a meaningful amount of our revenue by purchasing cloud services from our customers.” The question is not whether the loop exists but how large a share of Anthropic’s spend it covers, which is the subject of the compute section below.
Why Anthropic Wants an Anchor Investor at All
A company with $65 billion of run-rate revenue and a $15 billion credit facility in the works does not need $10 billion from any single buyer. It needs the book to look full on the first day of marketing, and the size of this book has no precedent.
The raise against every record before it
Dealogic counts a record $137 billion of US IPO proceeds through the end of August, excluding SPACs. A $100 billion Anthropic offering would be 73% of that entire eight-month total in one deal. It would be a third larger than SpaceX’s $75 billion in June, which CNBC called the largest IPO in history, and more than four times Alibaba’s $21.8 billion in 2014, which held the US record for a decade. Even at $2 trillion, selling $100 billion means floating 5% of the company, against 4.2% for SpaceX at $1.77 trillion.
The calendar leaves no room for a soft book
Reuters reported on 4 September that Anthropic’s public prospectus had slipped to late September and marketing to mid-October at the earliest, with completion still targeted before the 3 November midterm elections. Counting from the anchor investor report on 11 September, that is 53 days to get a $100 billion deal filed, marketed, priced and closed. An anchor investor is the mechanism for removing the biggest uncertainty from that window before the roadshow begins, which is why the talks are happening now rather than after the filing.
Public-market appetite is the thing being tested
Reuters’ own framing is that the listing is “a major test of public-market appetite for the enormous valuations and capital requirements of frontier AI labs.” SpaceX had Starlink revenue and a decade of launch contracts. Anthropic will be asking public investors to underwrite a company whose run rate went from about $9 billion to more than $65 billion in seven months, on projections of $190 billion to $200 billion for 2028. An anchor investor that also happens to be the company’s most important chip supplier tells the rest of the book that the people closest to the compute bill are still buying.
The Compute Ties Behind the Anchor Investor Role
Reuters describes Anthropic as relying “heavily on Nvidia GPUs, while also seeking to diversify its chip suppliers”. Anthropic’s own announcements put numbers on both halves of that sentence, and the split is not what the anchor investor story implies.
Who supplies Anthropic’s compute, and whose silicon it is
| Supplier and date | Commitment, as announced | Silicon | Nvidia? |
|---|---|---|---|
| Amazon Web Services, 20 April 2026 | More than $100 billion over ten years, up to 5 GW; over one million Trainium2 chips already in use | Trainium2, Trainium3, later generations; Graviton | No |
| Google and Broadcom, 6 April 2026 | Multiple gigawatts of next-generation TPU capacity from 2027 | Google TPU | No |
| Microsoft Azure, 18 November 2025 | $30 billion of Azure capacity plus up to 1 GW | Nvidia Grace Blackwell and Vera Rubin | Yes |
| Nscale, reported 26 August 2026 | About $45 billion over six years for roughly 460 MW in West Virginia | Nvidia Vera Rubin | Yes |
| In-house chip team, 5 August 2026 | Hiring engineers to co-design custom chips for Claude; no product, node or date announced | Custom, alongside AWS, Google, Nvidia and AMD | Not yet |
Of the dollar figures Anthropic or its suppliers have disclosed, the AWS commitment alone exceeds the Azure and Nscale contracts combined ($100 billion against $75 billion), and it runs on Amazon’s own chips. The Google and Broadcom agreement adds multiple gigawatts of TPUs on top. So the anchor investor would be backing a customer that is spending more, by its own announcements, on non-Nvidia silicon than on Nvidia’s.
What Nvidia gets that a passive anchor investor would not
The November 2025 partnership committed the two companies to joint engineering work, and the Nscale contract, which we analysed in our report on the Nscale $45 billion Vera Rubin deal, puts a further 460 megawatts of Nvidia racks into Anthropic’s fleet from late 2027. Our earlier explainer on Nvidia Vera Rubin covers what that generation changes. An anchor investor stake would not add a single GPU to those contracts. What it adds is a seat close to the largest customer whose long-term chip strategy is explicitly to need Nvidia less, which is a reason to hold equity rather than to rely on purchase orders.
Demand has strained capacity, on the company’s own account
Reuters notes that “demand for Claude has strained its available computing capacity”, and Anthropic’s April statements say the same in its own words, promising “meaningful compute in the next three months and nearly 1GW in total before the end of the year” from AWS. That is the context for the anchor investor talks: the money Anthropic raises at the IPO is compute money, and Nvidia has an interest in which vendors receive it.
The Valuation an Anchor Investor Would Be Underwriting
Reuters’ sources put the valuation at “around $2 trillion”. Anthropic’s disclosed revenue lets you see what an anchor investor would be paying for, and how quickly the marks have moved.
The run-rate ladder Anthropic has published
Anthropic’s own posts give the sequence: about $9 billion at the end of 2025, $14 billion at the Series G in February, more than $30 billion at the Google and Broadcom announcement in April, $47 billion at the Series H in May, and above $65 billion by the end of July per Reuters. That is a 7.2-fold rise in seven months. The valuation marks moved almost as fast: about $350 billion in November 2025, $380 billion in February, $965 billion in May and now a reported $2 trillion, which is 5.7 times the November figure in 297 days.
| Valuation mark | Run rate at the time | Multiple of run rate | Source of the mark |
|---|---|---|---|
| Series G, Feb 2026: $380 billion | $14 billion | 27.1x | Anthropic announcement |
| Series H, May 2026: $965 billion | $47 billion | 20.5x | Anthropic announcement |
| Reported IPO, Sept 2026: $2 trillion | Above $65 billion | 30.8x | Reuters’ sources |
| Reported IPO against 2028 projection | $190 billion to $200 billion | 10.3x at the midpoint | Reuters, prior reporting |
| OpenAI, Feb 2026: $852 billion | About $40 billion | 21.3x | Round announcement, Reuters |
What the multiple says about the anchor investor’s bet
At $2 trillion on a $65 billion run rate, the anchor investor is paying 30.8 times current annualised revenue, a higher multiple than the Series H (20.5x) or OpenAI’s last round (21.3x), and roughly 10 times the 2028 projection. The reason the multiple can rise while the round gets bigger is that the run rate has been doubling faster than the marks; the Series H was struck at a lower multiple than the Series G. Whether the IPO holds that pattern depends on the run-rate figure Anthropic puts in the prospectus, and that is the number the anchor investor will see before anyone else.
We looked at the same question from the other side in our piece on the Cognition valuation doubling while its revenue multiple stayed flat. Anthropic’s marks have moved the other way: the multiple compressed from February to May, then expanded again in the IPO chatter.
The caveat that belongs on every valuation sentence
Nothing about $2 trillion has been filed. As we noted when the calendar slipped, the figure is an expectation attributed to sources, not a price range, and the first document that will carry a range is the public prospectus. Until then, every multiple in this section is arithmetic on a rumour.
What Could Change Before an Anchor Investor Is Named
Reuters was careful to say the plans “could change”. Here is what is actually undecided, and what would tell you which way it went.
Nvidia’s own record on headline numbers
The OpenAI history above is the base rate: a $100 billion headline became $30 billion, and the interval between the announcement and the money was five months. An “up to $10 billion” anchor investor figure sourced to one person is softer than that letter of intent was. It could be $10 billion, it could be less, and Huang’s stated preference for participating at the IPO stage rather than writing another private cheque cuts in favour of it happening at all.
The prospectus is where the anchor investor terms will appear
Arm and Instacart both disclosed their cornerstone investors on the cover of the prospectus, with the “up to” amount and the non-binding language. If Nvidia is an anchor investor, expect the same paragraph in Anthropic’s S-1 when it goes public, which Reuters’ 4 September reporting placed in late September. That paragraph, not a press release, will say whether the $10 billion is an indication of interest or something firmer, and whether any lock-up applies.
Other anchors, and the allocation question
Reuters names only Nvidia. SpaceX’s anchor investor was a sovereign fund, and Anthropic’s Series G and Series H included GIC, MGX, Qatar Investment Authority and Temasek, so there are obvious candidates for a second and third anchor investor. If several names commit, the share of the offering that is pre-placed becomes the number to watch; Instacart’s 60.6% is the cautionary example, and Arm’s 15.1% the conventional one.
What would count as confirmation
| Signal | Where it would appear | What it would settle |
|---|---|---|
| Cornerstone paragraph naming Nvidia | Anthropic public S-1, expected late September | Whether the anchor investor role is real and how much is indicated |
| Price range | Amended S-1 before the roadshow, mid-October at the earliest | Whether $2 trillion survives contact with the bankers |
| Nvidia commitments table | Nvidia 10-Q for the quarter ending 25 October | Whether a new equity commitment has been booked |
| Allocation and lock-up | Final prospectus at pricing | Whether the anchor investor got its full $10 billion and whether it can sell |
| Statement from either company | Newsroom or filing | Both declined on 11 September; a comment either way would be new |
What the Anchor Investor Story Means for Businesses Using Claude
Most readers of this site buy Claude through an API key, a cloud marketplace or a subscription rather than through a brokerage account. The anchor investor talks still touch three things they care about.
Compute security, and who pays for it
An IPO of this size is compute money, and Anthropic’s own statements say demand has strained capacity. A successful raise, anchored or not, funds the AWS, Google, Azure and Nscale contracts that decide whether rate limits loosen in 2027. Nvidia as an anchor investor does not change that arithmetic, but it does make Nvidia’s interest in Anthropic’s capacity plans a shareholder interest as well as a supplier one.
Vendor concentration works in both directions
Enterprises that have standardised on Claude, including through our own work on Claude Fable 5.1 and Claude Mythos 5.1, are now buying from a company whose largest chip supplier may be one of its largest shareholders. That is the same structure OpenAI’s customers have lived with since February. It is not a reason to change vendors, but it is a reason to read the prospectus’s related-party section when it arrives, because the compute contracts in it are the ones that set your unit costs.
Pricing pressure after a public listing
A public company at 30 times run rate has to show the multiple was earned. The lever available to Anthropic is the same one available to any software vendor: price. Businesses planning multi-year Claude spend should model the possibility that the terms they sign in 2026 are the cheapest they will see, and lock in what can be locked in. An anchor investor at the IPO does not cause that; a $2 trillion valuation does.
Frequently Asked Questions About the Anchor Investor Talks
What exactly is an anchor investor in a US IPO?
An institution that indicates, before the roadshow, an interest in buying a set amount of the offering at the public price. In Arm’s and Instacart’s prospectuses those indications were expressly non-binding, and the underwriters could allocate “more, fewer, or no” shares to them. Reuters describes the role as “an early vote of confidence in the shares”.
How much is Nvidia considering, and is it confirmed?
Reuters reported on 11 September 2026 that Nvidia is considering up to $10 billion, sourced to one person familiar with the matter. Neither company confirmed it. Anthropic declined to comment and Nvidia did not immediately respond. The plans “remain under discussion and could change”.
Does Nvidia already own Anthropic shares?
Yes. Nvidia committed up to $10 billion in November 2025 and is listed among the investors in Anthropic’s $30 billion Series G at a $380 billion post-money valuation in February 2026. CNBC reported on 4 September that the $10 billion had been finalised. At the Series G price that is roughly a 2.6% stake before later dilution.
How does $10 billion compare with other anchor investor commitments?
It would be 10% of a $100 billion offering. Arm’s ten cornerstone investors indicated $735 million of a $4.87 billion deal (15.1%), SpaceX’s reported PIF anchor was about $5 billion of $75 billion (6.7%), and Instacart’s five cornerstone investors indicated $400 million of $660 million (60.6%).
When would the anchor investor be named?
In the public prospectus, if the arrangement is agreed. Reuters reported on 4 September that Anthropic’s public filing had slipped to late September, with marketing from mid-October at the earliest and completion targeted before the 3 November midterm elections.
Is Reuters’ Arm example accurate?
Partly. Arm’s F-1 lists Nvidia among ten cornerstone investors, but Amazon is not one of them; Amazon appears in that filing only as a customer. Reuters’ sentence that Arm’s anchor investors “included Nvidia and Amazon” overstates the second name.
References and Further Reading
Exclusive: Nvidia in talks to invest in Anthropic’s mega IPO, sources say (Reuters via AOL)
Exclusive: Nvidia in talks to invest in Anthropic’s mega IPO, sources say (Reuters via MSN)
Arm Holdings plc, Amendment No. 1 to Form F-1 (SEC EDGAR)
Maplebear Inc. (Instacart), Form S-1 (SEC EDGAR)
NVIDIA Corporation, Form 10-Q for the quarter ended July 26, 2026 (SEC EDGAR)
NVIDIA Announces Financial Results for Second Quarter Fiscal 2027
Nvidia’s investments grow to $99 billion as chip giant becomes major backer of AI companies (CNBC)
Nvidia embraces AI investor role, topping $40 billion in equity bets in 2026 (CNBC)
Nvidia, OpenAI appear stalled on their mega deal. But the AI giants still need each other (CNBC)
Anthropic valued in range of $350 billion following investment deal with Microsoft, Nvidia (CNBC)
Microsoft, NVIDIA and Anthropic announce strategic partnerships (Anthropic)
Anthropic raises $30 billion Series G funding at $380 billion post-money valuation (Anthropic)
Anthropic raises $65B Series H at $965B valuation (Anthropic)
Anthropic and Amazon expand compute collaboration (Anthropic)
Anthropic raises $65 billion, nears $1T valuation ahead of IPO (TechCrunch)
Anthropic to build in-house chip design team for Claude, hire engineers (Reuters via TradingView)
CNBC Daily Open: SpaceX IPO, the largest in history
SpaceX is poised to be the biggest IPO ever. Here are the top U.S. deals to date (CNBC)
Market trends in cornerstone investment (Clifford Chance)
Planning and Disclosing Indications of Interest for Participating in IPOs (Olshan)
Microsoft, NVIDIA and Anthropic announce strategic partnerships (Microsoft)
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