Not yet. Anthropic's S-1 became public on October 26, 2026, but it isn't effective, and the price range and share count are still blank. Those come in an amended S-1. Media reports point to a road show as early as the week of November 9 and a debut before Thanksgiving, but Anthropic hasn't confirmed dates. We'll update this page as things change.

Per the S-1, the liquidity condition is satisfied when the registration statement becomes effective. For RSUs that have already met their time-based condition, the S-1 describes net settlement, where shares are withheld to cover estimated taxes. Your grant agreement and Anthropic's equity team have the final word on your numbers, and we'll help you read them.

Because withholding is an estimate. Federal withholding on supplemental income is a flat 22% up to $1M and 37% above that, but what you actually owe depends on your total income, state and local taxes, and everything else landing in the same year. If salary, bonus, RSU settlement, and any tender proceeds stack up, you can owe more at filing. We model it before settlement so you can set cash aside. More in our post on RSU tax withholding.

It depends on your lock-up agreement. Anthropic's S-1 sets a staggered lock-up instead of one big 180-day wait, and the timeline above shows when releases are expected. Confirm which tranche applies to you with Anthropic's equity team, and we'll map your sale plan to it.

We aren't sure yet! Many Ants have been told they will be mandatory but the S-1 makes no mention of this. Plenty of employees at recently public companies use one anyway, because it takes the stress out of diversifying. Our full guide to 10b5-1 plans walks through it.

Often yes, if your company's policy allows it. Adopting a plan in an open window lets the cooling-off period (30 days for most employees, 90 to 120 days for officers and directors) run during the lock-up. The S-1 notes that no plan can transfer shares during a lock-up that applies to you, so sales start after your release date.

Anthropic did a 10-for-1 forward split of its Class A and Class N common stock on September 17, 2026, and the S-1 adjusts share, option, and RSU figures to match. Share counts and exercise prices are typically adjusted for splits, so check your equity portal for the split-adjusted numbers.

It depends on how much of your net worth is in one stock, your tax situation, and what you want the money to do. A lot of people end up with far more in a single stock than they'd ever choose on purpose. Keep the lock-up schedule in mind too. A good place to start is should I sell my RSUs immediately?

Possibly. Exercising ISOs can trigger the alternative minimum tax based on the spread between your exercise price and the fair market value. We plan exercises, sometimes across tax years, and weigh whether to sell or hold the shares.

Extremely unlikely in this case. Eligibility depends on when and how your shares were issued and on the company's size at that time. RSU shares issued at settlement and recently exercised options generally won't qualify. We check eligibility share by share, and you should confirm with a tax professional.