The IPO isn't your payday

Anthropic's proposed public listing has made something that once felt theoretical look more tangible for employees holding substantial equity.

There is a filing. There is a proposed ticker. There is the prospect of a public market for the shares.

But that does not mean an employee suddenly has spendable wealth.

A filing, a flotation and the point at which someone can actually sell their shares are different events.

For an American working in London, the useful question is therefore not simply: what might my shares be worth?

It is: what do I actually own, when could I turn it into cash, what might remain after tax, and what would I want that money to do?

Start with what you actually own

An employee may have several different types of equity.

Some shares may already be owned.

Some restricted stock units, or RSUs, may have vested. Others may still depend on continued employment.

Options may give the employee the right to buy shares at a set price.

These are not the same thing.

Suppose a stock-plan portal shows awards with a headline value of $2 million.

That does not mean the employee has $2 million available to spend.

Some awards may not have vested. Options may need to be exercised. Selling restrictions may apply. Tax may be due. And the eventual share price may be very different from the value shown today.

The first job is therefore to establish what has actually vested, what remains conditional and when each award could potentially become saleable.

A public share price is not cash

Even after a listing, employees may not be able to sell immediately.

Lock-ups, company trading policies and other restrictions can affect when shares become available.

The share price can also move between the IPO and the first point at which an employee is able to sell.

That creates three different numbers:

the value shown on paper,
the amount that can actually be sold,
and the amount left for the family after tax.

They should not be treated as interchangeable.

The UK-US position adds another layer

For an American who has moved to London, equity can cross two tax systems.

US citizens generally remain within the US tax system while living abroad. At the same time, UK rules can apply to employment-related shares and options.

If an award was granted while someone worked in America, continued vesting after the move to London and was eventually sold while they were UK resident, the analysis can become more complicated.

RSUs, options and shares already owned can also have different tax triggers.

This is where coordination matters.

Before treating anticipated proceeds as available for a house, school fees or another goal, establish what event creates tax in each country, what has already been withheld and what the family could realistically keep.

Then decide what the money is for

Eventually, the employee may be able to sell.

That creates another question: how much?

Someone who has helped build a company may understandably want to retain a meaningful shareholding.

But keeping a very large position also means the family's wealth, future compensation and career can all remain tied to the same company.

Rather than starting with a prediction about the share price, start with the family's priorities.

How much would make the London home secure?

How much is needed for education?

What would allow one partner to work less?

How much would make a future move back to America easier?

Once those goals have a number attached to them, it becomes easier to decide how much wealth needs to become independent of the employer and how much exposure the employee is comfortable retaining.

What would liquidity actually change?

This is the more interesting question.

For years, another vest or promotion may have felt essential because so much of the family's future depended on continued employment and the value of the company.

If enough equity eventually becomes usable wealth, that may change.

Perhaps the employee still wants the next promotion.

Perhaps they want to keep working just as hard.

But perhaps the house no longer depends on the next vest.

Perhaps returning to America becomes a choice rather than something that has to wait.

Or perhaps, after tax and realistic planning, the amount turns out not to change very much at all.

The IPO itself is an event in the company's story.

For the employee, the important moment is when wealth on paper can finally be connected to something the family actually wants.

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The example is illustrative. Equity awards, selling restrictions and tax treatment depend on the specific plan, award terms and individual circumstances.