Y Combinator

Accelerator · Mountain View, CA

Verified active in the last 12 monthsSEC-registered adviser

Accelerator based in Mountain View, CA. Most recent fund on file: Y Combinator ES26, LLC ($228M offering), filed Apr 2026.

“Y Combinator created a new model for funding early stage startups. Four times a year we invest in a large number of startups.” (from the firm’s website)

Stages: Pre-seed to Series B
Typical check (est.): $250K–$500K
Latest fund: $228M · Apr 2026
Last verified activity: Sep 2026

Focus

AI & MLB2B SoftwareDeveloper ToolsHardware & RoboticsIndustrial & Manufacturing

Recent portfolio activity

Most Robotic
Accelerator batch · CA
Sep 2026
Amorphic Labs
Accelerator batch · CA
Sep 2026
Dipole Labs
Accelerator batch · MA
Sep 2026
Illume Labs
Accelerator batch · CA
Sep 2026
Sidekick
Accelerator batch · CA
Sep 2026
rekursiv.ai
Accelerator batch · CA
Sep 2026
Tsenta
Accelerator batch · CA
Sep 2026
Poth Labs
Accelerator batch · CA
Sep 2026
Applied Electrodynamics, Inc.
Accelerator batch · CA
Sep 2026
Litmus
Accelerator batch · CA
Sep 2026
Meteoric
Accelerator batch · CA
Sep 2026
WonderTx
Accelerator batch · CA
Sep 2026
Trident
Accelerator batch · CA
Sep 2026
Ekpa
Accelerator batch · MA
Sep 2026
Rapidfolio
Accelerator batch · CA
Sep 2026

Funds and vehicles on SEC file

Y Combinator ES26, LLC
Fund · $228M offering
Apr 2026
Y Combinator ES24, LLC
Fund · $153M offering
Apr 2024

Sources

SEC Form D: Y Combinator ES26, LLCApr 27, 2026
SEC Form D: Y Combinator ES24, LLCApr 9, 2024
SEC adviser record: Y CombinatorMar 27, 2026
Firm websiteOct 12, 2026

Profile last verified Oct 12, 2026. Is this you? Correct or remove this profile.