Anthropic's Unusual IPO Rules
Anthropic Considers Mandatory 10b5-1 Trading Plans For All Employees Before IPO
Anonymous
Key Points
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If adopted, Anthropic's 10b5-1 plans could allow employee stock sales outside standard trading windows, but would cap the timing and size of trades.
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Financial advisory firms working with Anthropic employees have already recommended voluntary adoption of 10b5-1 plans ahead of the IPO.
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Anthropic confidentially submitted a draft Form S-1 to the SEC around June 1, 2026, as it considered a public listing.
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A reported Series H funding round put a post-money valuation near $965 billion with run-rate revenues cited around $47 billion, per coverage tied to Anthropic's fundraising context.
Anthropic is weighing a rare move: requiring every employee — not just executives — to use preset stock-trading plans ahead of its IPO, according to TipRanks and The Edge Malaysia. Known as 10b5-1 plans, these arrangements force sellers to lock in the timing, amount, and price of stock sales in advance, cutting off any chance of trading on inside information.
The company confidentially filed a draft Form S-1 with the SEC around June 1, 2026, signaling a serious push toward going public, TipRanks reported. If Anthropic follows through on the mandatory trading-plan idea, it would be a highly unusual step for any pre-IPO company.
What a 10b5-1 Plan Actually Does
A 10b5-1 plan is a legal agreement where an employee sets their trade details before they ever get access to sensitive company news. The SEC updated the rules in 2022 to add stricter safeguards. Now sellers must wait through a cooling-off period. They must also certify in writing that they hold no material non-public information — meaning no secret news that could move the stock price.
The plans are common among CEOs and top executives. Extending them to rank-and-file workers is rare. Anthropic's proposal would cap when and how much any employee can sell, Freedom 96.9 reported. It would create a clear paper trail that regulators could follow if questions ever arose about insider trading.
Advisers Already Pushing Employees to Sign Up Voluntarily
Even before any company-wide rule is set, financial advisory firms working with Anthropic employees have already started recommending 10b5-1 plans on a voluntary basis, according to Mezha. That suggests growing pressure inside Anthropic's orbit to get ahead of any compliance problems before the IPO opens the company to public scrutiny.
Anthropic is also weighing limits on how much stock insiders can sell on the very first day of trading, along with post-IPO lockup periods that would block sales for a set time after the listing, The Edge Malaysia reported. Together, these moves point to a deliberate effort to project strong governance to investors from day one.
A $965 Billion Valuation Sets the Stakes
The IPO planning comes as Anthropic's valuation has soared. A reported Series H funding round put the company's post-money valuation near $965 billion, with run-rate revenues cited around $47 billion, per TipRanks. At that scale, even small employee stock sales could move markets — which makes the insider-trading risk very real.
The higher the valuation, the more eyes regulators and investors will put on every trade. Requiring all employees to use 10b5-1 plans would give Anthropic a strong defense: every sale was planned in advance, with no secret information involved. That argument could prove valuable if any trade is ever questioned after the company goes public.
Why This Could Set a New IPO Governance Standard
Most companies only ask senior leaders to use these plans. Applying the rule to every worker — from engineers to office staff — would be a major step beyond current norms, Head Topics noted. Governance experts and institutional investors increasingly reward companies that go beyond the legal minimum on transparency.
If Anthropic adopts the policy and it goes smoothly, other high-profile tech companies preparing to go public could face pressure to do the same. The move would signal that Anthropic views governance not just as a legal checkbox, but as a competitive advantage in winning investor trust on its way to a public listing.
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