# ASI raises $325M Series C led by Spark Capital

> ASI, based in United States, has raised $325M in a Series C led by Spark Capital, announced on 20 October 2026. 6 other investors joined.

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

Raised **$325M** 5 sources reported it

Stage **Series C** first round on record

Investors **7** 1 named as lead

Where **US** United States

AI Aviation Construction Energy

## How big is it?

Against every equity round we recorded in the twelve months to 20 October 2026. Ranks count companies, so the same raise reported twice is counted once.

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

**#34** Series C of 225 in that time

**#116** round in United States, of 1,235

This round **$325M**

Median Series C **$100M**

3.3 times the median Series C of the last twelve months.

## Who invested

- [**Spark Capital** 56 rounds in the last twelve months *Led*](https://millionrounds.com/fund/spark-capital)

Also in the round

- [Andreessen Horowitz](https://millionrounds.com/fund/andreessen-horowitz)
- [Craft Ventures](https://millionrounds.com/fund/craft-ventures)
- [Energy Impact Partners](https://millionrounds.com/fund/energy-impact-partners)
- [Meritech Capital Partners](https://millionrounds.com/fund/meritech-capital-partners)
- [Citadel Securities](https://millionrounds.com/fund/citadel-securities)
- [Citadel Securities affiliates](https://millionrounds.com/fund/citadel-securities-affiliates)

## Funding history

- October 2026 Series C **$325M**

This is the first round we hold for the company.

## Reported by

- ascendants.in 20 October
- Ventureburn 20 October
- Silicon Angle 21 October
- TechStartups 21 October
- Wowtale 24 October

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

## Other big rounds that week

[**Kalshi** $1.0B Series G](https://millionrounds.com/news/rounds/kalshi-series-g-2026-10)[P **Pathos AI** $237M Series E](https://millionrounds.com/news/rounds/pathos-ai-series-e-2026-10)[W **Warhound** $200M Seed](https://millionrounds.com/news/rounds/warhound-seed-round-2026-10)[W **Warp Sciences** $215M Series A](https://millionrounds.com/news/rounds/warp-sciences-series-a-2026-10)[**Xona** $250M Series D](https://millionrounds.com/news/rounds/xona-series-d-2026-10)[**Tractian** $130M Series D](https://millionrounds.com/news/rounds/tractian-series-d-2026-10)

[The company **ASI on Millionrounds** *→*](https://millionrounds.com/company/asi)[Weekly roundup **Week of 19 October** *→*](https://millionrounds.com/news/weekly/2026-10-19)[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)