# Anthropic valued at $1.325 trillion became Largest private company

*Science. 65% certain. Thursday, 1 October 2026*

> Speculative fiction assembled from prediction-market prices. This has not happened.

**The firm also stayed above the $1.125 trillion low benchmark.**

This valuation made it the Largest private company at the end of the month. The firm also stayed above the $1.125 trillion low benchmark, which it did not reach.

The ranking placed Anthropic ahead of other notable private firms, including Revolut, Perplexity and Neuralink. Those companies were previously among the Largest private entities. The new top spot reflected Anthropic's rapid growth in the AI sector.

The valuation figure was compiled as of September 30, the standard cut-off for end-month assessments. Data were reviewed and confirmed on Thursday, 1 October. The timing aligned with the regular reporting schedule for private-company metrics.

The data were finalized on Thursday, 1 October. At that point Anthropic's valuation stood at $1.325 trillion. The firm held the position of the Largest private company at the end of September.

## Analysis

Being the Largest private company by valuation gives Anthropic a benchmark status that may affect competitive dynamics. Rival private firms may seek mergers, strategic partnerships, or accelerated fundraising to challenge that position, while larger corporations might view Anthropic as a potential acquisition target or a key technology partner.

The fact that Anthropic remained above the $1.125 trillion low threshold shows the valuation did not slip to the lower benchmark, but the absence of a higher target being met leaves open questions about the pace of future growth.

## What this was built from

- **Largest private company end of September?**: Anthropic, 98%; settles Thursday, 1 October 2026 (polymarket). [Market](https://polymarket.com/event/largest-private-company-end-of-september-20260829014000033)
- **Will Anthropic's valuation hit (HIGH) $1.325T by September 30?**: Yes, 100%; settles Thursday, 1 October 2026 (polymarket). [Market](https://polymarket.com/event/will-anthropics-valuation-hit-by-september-30-20260829005000001)
- **Will Anthropic's valuation hit (HIGH) $1.375T by September 30?**: No, 65%; settles Thursday, 1 October 2026 (polymarket). [Market](https://polymarket.com/event/will-anthropics-valuation-hit-by-september-30-20260829005000001)
- **Will Anthropic's valuation hit (LOW) $1.125T by September 30?**: No, 99%; settles Thursday, 1 October 2026 (polymarket). [Market](https://polymarket.com/event/will-anthropics-valuation-hit-by-september-30-20260829005000001)