# Oratomic raises $475M Series B led by General Catalyst

> Oratomic, based in United States, has raised $475M in a Series B led by General Catalyst, Khosla Ventures and Index Ventures, announced on 8 October 2026.

Source: https://millionrounds.com/news/rounds/oratomic-series-b-2026-10 (Millionrounds; every figure on the page links to its filing or article)

Raised **$475M** 2 sources reported it

Stage **Series B** 1 earlier round on record

Investors **6** 6 named as lead

Where **US** United States

Quantum Computing

## How big is it?

Against every equity round we recorded in the twelve months to 8 October 2026. Ranks count companies, so the same raise reported twice is counted once.

**#120** equity round of the last twelve months

**#11** Series B of 405 in that time

**#84** round in United States, of 1,161

This round **$475M**

Median Series B **$50M**

9.5 times the median Series B of the last twelve months.

## Who invested

- [**General Catalyst** 258 rounds in the last twelve months *Led*](https://millionrounds.com/fund/general-catalyst)
- [**Khosla Ventures** 157 rounds in the last twelve months *Led*](https://millionrounds.com/fund/khosla-ventures)
- [**Index Ventures** 119 rounds in the last twelve months *Led*](https://millionrounds.com/fund/index-ventures)
- [**Spark Capital** 56 rounds in the last twelve months *Led*](https://millionrounds.com/fund/spark-capital)
- [**ARCH Venture Partners** 37 rounds in the last twelve months *Led*](https://millionrounds.com/fund/arch-venture-partners)
- [**Bezos Expeditions** 12 rounds in the last twelve months *Led*](https://millionrounds.com/fund/bezos-expeditions)

## Funding history

- October 2026 Series B **$475M**
- July 2026 Series A **$300M**

$775M raised across the 2 rounds we hold.

## Reported by

- Silicon Angle 8 October
- AlleyWatch 12 October

The round's figures come from these reports; each link opens the original.

## Other big rounds that week

[**TypeSafe AI** $870M Series A](https://millionrounds.com/news/rounds/typesafe-ai-series-a-2026-10)[**Oxide** $445M Series D](https://millionrounds.com/news/rounds/oxide-series-d-2026-10)[**VEIR** $110M Series C](https://millionrounds.com/news/rounds/veir-series-c-2026-10)[**DeepSeek** $15B Series B](https://millionrounds.com/news/rounds/deepseek-series-b-2026-10)[M **Manus / Butterfly Effect** $500M Growth](https://millionrounds.com/news/rounds/manus-butterfly-effect-growth-round-2026-10)[**Arena** $200M Series B](https://millionrounds.com/news/rounds/arena-series-b-2026-10)

[The company **Oratomic on Millionrounds** *→*](https://millionrounds.com/company/oratomic)[Weekly roundup **Week of 5 October** *→*](https://millionrounds.com/news/weekly/2026-10-05)[Monthly roundup **October 2026** *→*](https://millionrounds.com/news/monthly/2026-10)

**How this article is made**

We write one for every equity round of $100M or more that at least two sources reported. It is put together from our record of rounds, not rewritten from the reports: the ranks and medians count every equity round we read in the twelve months to the round's date. [How we read rounds](https://millionrounds.com/methodology) · [Report a mistake](https://millionrounds.com/corrections)