# Arena raises $200M Series B led by Lightspeed Venture Partners

> Arena, based in United States, has raised $200M in a Series B led by Lightspeed Venture Partners and Khosla Ventures, announced on 8 October 2026.

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

Raised **$200M** 3 sources reported it

Stage **Series B** 6 earlier rounds on record

Investors **8** 2 named as lead

Where **US** United States

AI

## 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.

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

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

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

This round **$200M**

Median Series B **$50M**

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

## Who invested

- [**Lightspeed Venture Partners** 174 rounds in the last twelve months *Led*](https://millionrounds.com/fund/lightspeed-venture-partners)
- [**Khosla Ventures** 157 rounds in the last twelve months *Led*](https://millionrounds.com/fund/khosla-ventures)

Also in the round

- [Andreessen Horowitz](https://millionrounds.com/fund/andreessen-horowitz)
- [Salesforce Ventures](https://millionrounds.com/fund/salesforce-ventures)
- [Felicis](https://millionrounds.com/fund/felicis-ventures)
- [Endeavor Catalyst](https://millionrounds.com/fund/endeavor-catalyst)
- [Dell Technologies Capital](https://millionrounds.com/fund/dell-technologies-capital)
- [01 Advisors](https://millionrounds.com/fund/01-advisors)

## Funding history

- October 2026 Series B **$200M**
- January 2026 Series A **$150M**
- April 2025 Series B **$30M**
- June 2023 Seed **$750K**
- January 2023 Pre-seed **$1.2M**
- March 2022 Series A **$14M**
- July 2021 Seed **$5.2M**

$401M raised across the 7 rounds we hold.

## Reported by

- Firms' own news pages
- Leap Ventures 8 October
- TechStartups 9 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)[**Oratomic** $475M Series B](https://millionrounds.com/news/rounds/oratomic-series-b-2026-10)

[The company **Arena on Millionrounds** *→*](https://millionrounds.com/company/arena)[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)