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Anthropic will let some insiders sell 10% of locked-up shares on IPO day

Anthropic will let some insiders sell 10% of locked-up shares on IPO day

Anthropic official brand assets (anthropic.com)

Non-founder insiders can sell up to 10% of locked-up shares on IPO day, while co-founders stay locked up for up to a year.

Anthropic will allow some insiders to sell up to 10% of their locked-up shares as soon as its stock begins trading, according to the company’s S-1 filed Monday. The early release covers non-founder directors, officers and certain current and former employees and consultants.

Those holders can sell an additional 35% on the second full trading day after Anthropic publishes full-year 2026 results. The rest unlocks at the earlier of the second trading day after first-quarter 2027 results or 180 days after the IPO.

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Founders face the longest wait

The seven co-founders and stockholders holding more than 0.5% of fully diluted shares are bound by an extended lockup. It ends at the earlier of the second trading day after third-quarter 2027 results or 365 days after the offering. 

Other holders unlock in staged tranches, starting with up to 6% on the 27th and 48th days after the IPO. Goldman Sachs and Morgan Stanley can waive the restrictions early.

The co-founders have each pledged 80% of their personal equity to philanthropy, the filing said. Anthropic warned that donations and later sales by recipients could put a significant number of shares on the market.

Disclosure: This article was edited by Diego Almada Lopez. For more information on how we create and review content, see our Editorial Policy.