Anthropic Set to File IPO Prospectus After Labor Day, Eyes Late September Listing

Anthropic, the company behind the Claude AI models, could emerge as one of the most significant IPOs of the year, with recent reports suggesting a public listing could occur within weeks.

The AI startup plans to release its IPO prospectus after Labor Day, with a target public listing in late September or early October, according to sources cited by The Information. The development represents an eagerly anticipated opportunity for investors seeking exposure to Anthropic’s growing AI capabilities, though the deal’s reported structure adds particular intrigue.

How Anthropic is reportedly structuring its IPO

Anthropic’s rumored IPO plans include several distinctive elements. Details obtained by The Information indicate the company may permit existing shareholders to sell shares as part of the IPO offering. Additionally, the company is reportedly considering lockup periods extending beyond the standard 180 days and could require rank-and-file employees to sell shares through preset 10b5-1 plans rather than during post-earnings windows.

These approaches would diverge from other IPOs this year, including Space Exploration Technologies (SpaceX) and Cerebras. Neither company allowed existing shareholders to sell as part of their IPOs, and both implemented tiered lockup periods with tranches of shares becoming available periodically.

Anthropic may be pursuing this structure to mitigate the volatility observed following SpaceX’s June IPO. The space stock surged to $226 within days of going public, only to decline to $105 in subsequent weeks. The share price has since recovered to $141 as of September 2, near its IPO price of $135.

Extended lockup periods and scheduled, staggered selling would provide greater predictability for a recent IPO with limited trading volume.

Should you invest in the Anthropic IPO?

While the prospect is exciting, Anthropic appears to present considerable investment risk with an almost certain premium attached. Reports indicate the company may be seeking to raise capital at a valuation exceeding $2 trillion. Without access to a public S-1 filing (the company initially filed for public listing with a confidential report), obtaining a complete financial picture remains challenging, though third-party sources have provided some insights.

Analysts estimate Anthropic achieved its first operating profit of approximately $559 million in the second quarter of 2026. The company reportedly generated $10.9 billion in revenue that quarter, a significant increase from $4.8 billion in the first quarter. Its annual run rate exceeded $65 billion by late July, up from roughly $9 billion at the end of 2025. While the growth trajectory is impressive, annual run rate represents an estimate of future revenue and may prove inaccurate if expansion slows.

The AI company has reportedly accumulated losses of approximately $10 billion to $15 billion since 2021, which is not unusual for a technology startup. However, at a $2 trillion valuation, the company would trade at roughly 30 times its annual run rate, making it an expensive entry point.

Investors may also encounter difficulty acquiring Anthropic shares at the IPO given anticipated high demand. Even for those able to purchase shares, a cautious approach seems advisable given the inherent risks. Alternatively, investors could gain indirect exposure through positions in Amazon or Alphabet, both of which hold stakes in the AI startup. Retail investors seeking direct exposure will need to await the IPO, which likely is not far off.

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