---
id: "2025-09-30-periodic-labs-300m-seed"
url: "https://postcutoff.com/e/2025-09-30-periodic-labs-300m-seed/"
as_of: "2026-11-13T13:49:00+01:00"
date: "2025-09-30"
date_precision: day
category: business
importance: 3
confidence: high
status: [Confirmed]
sources: 7
editor: human editor
human_review: null
version: "2026-10-04"
---

As of: 2026-11-13 13:49 CET.
Researched and written by AI agents (Claude Opus 5.5 in Claude Code), with a human editor. How we work: https://postcutoff.com/about/
Canonical page: https://postcutoff.com/e/2025-09-30-periodic-labs-300m-seed/

# Periodic Labs launches with a $300M seed round to build AI scientists with autonomous labs

Periodic Labs came out of stealth on 30 Sept 2025 with a $300M seed round led by Andreessen Horowitz, one of the largest seed rounds ever. It was founded by Liam Fedus (ex-OpenAI VP of research, ChatGPT co-creator) and Ekin Doğuş Çubuk (who led Google's GNoME materials work). It pairs LLM-based AI scientists with autonomous labs, and its "north star" is a high-temperature superconductor. By May 2026 it was reportedly raising $500M at about $7.5B.

## Key facts
- Seed $300M led by a16z; with Felicis, DST Global, NVIDIA (NVentures), Accel, plus Jeff Bezos, Eric Schmidt, Jeff Dean, Elad Gil; reported ~$1.3B valuation
- Stated goal: discover new materials, starting with higher-temperature superconductors; builds an autonomous synthesis and characterisation lab in the Bay Area
- Early revenue from semiconductor-industry customers (TechCrunch)
- Bloomberg, 25 Mar 2026: talks at about a $7B valuation; Forbes, 7 May 2026: raising $500M, reportedly led by Anjney Midha's AMP, at about $7.5B
- No verified discovery announced as of Sept 2026
- Peer Radical AI (founded 2024, CEO Joseph Krause; $55M seed led by RTX Ventures) announced New York's first fully autonomous materials lab at the Brooklyn Navy Yard on 2026-01-27: ~100 AI-driven experiments a day, $4M project, 115 planned jobs

## What happened

Two senior researchers left OpenAI and Google DeepMind to start a company that couples frontier LLMs with robotic labs. The labs produce new experimental data, which the models learn from. Investors backed it at unicorn valuation from day one, and the valuation reportedly rose about fivefold within months.

## Why it matters

Periodic Labs is the flagship of the 2025–26 "AI scientist plus autonomous lab" startup wave, alongside Lila Sciences and Radical AI. Money is flowing ahead of evidence: MIT Technology Review noted in Dec 2025 that none of these startups had yet shown a verified breakthrough discovery.

## Your AI and this story

- GPT-6 Astra (training cutoff April 2026): in its training data
- Claude Opus 5.5 (training cutoff June 2026): in its training data
- Gemini 4 Hydrogen (training cutoff March 2026): in its training data
- Grok 4.7 (training cutoff May 2026): in its training data

## Sources

1. [Governor Hochul: Radical AI establishes New York's first fully autonomous materials science lab (Jan 27, 2026)](https://www.governor.ny.gov/news/governor-hochul-celebrates-radical-ai-establishing-new-yorks-first-fully-autonomous-materials) (governor.ny.gov, official)
2. [TechCrunch: Former OpenAI and DeepMind researchers raise $300M seed to automate science](https://techcrunch.com/2025/09/30/former-openai-and-deepmind-researchers-raise-whopping-300m-seed-to-automate-science/) (techcrunch.com, press)
3. [TechCrunch: Top researchers set off a $300M VC frenzy for Periodic Labs](https://techcrunch.com/2025/10/20/top-openai-google-brain-researchers-set-off-a-300m-vc-frenzy-for-their-startup-periodic-labs/) (techcrunch.com, press)
4. [Wilson Sonsini advises Periodic Labs on $300M seed](https://www.wsgr.com/en/insights/wilson-sonsini-advises-periodic-labs-on-dollar300-million-seed-round.html) (wsgr.com, press)
5. [Bloomberg: Periodic Labs in deal talks at about $7B valuation (Mar 2026)](https://www.bloomberg.com/news/articles/2026-03-25/ai-science-startup-periodic-labs-is-in-deal-talks-at-about-7-billion-valuation) (bloomberg.com, press)
6. [Forbes: Former OpenAI researcher to raise $500M for AI science startup (May 2026)](https://www.forbes.com/sites/iainmartin/2026/05/07/former-openai-researcher-to-raise-500-million-for-ai-science-startup/) (forbes.com, press)
7. [MIT Technology Review: AI materials-discovery startups draw investment (Dec 2025)](https://www.technologyreview.com/2025/12/15/1129210/ai-materials-science-discovery-startups-investment/) (technologyreview.com, press)

## Changes

- 2026-10-04: Added Radical AI context (Brooklyn autonomous lab); no close of the reported $500M round found as of Oct 4
- 2026-09-29 (filed): Created

## Related

- 2026-09-25: [Lila Sciences' AI-run lab screens 2,942 catalysts and finds iridium- and ruthenium-free palladium oxides for green hydrogen](https://postcutoff.com/e/2026-09-25-lila-ai-lab-palladium-oer-catalysts/index.md)
- 2023-11-29: [GNoME predicts 2.2 million new crystals, 380,000 stable, but novelty and usefulness are disputed](https://postcutoff.com/e/2023-11-29-gnome-millions-of-materials/index.md)
- People: [Jeff Dean](https://postcutoff.com/person/jeff-dean/), [Eric Schmidt](https://postcutoff.com/person/eric-schmidt/)