Fundraising Fox

IBX

Venture capital

Rockville · Seed · 13 people tracked

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Investment thesis

IBX describes itself as an innovation and investment firm dedicated to advancing the state of humanity and human knowledge. It pursues new frontiers across space, technology, and energy with the stated aim of expanding human potential and creating positive impact in the world. The firm frames its approach around audacious pursuit as a means of connecting people, protecting the planet, and advancing human ways of life.

Source: firm website, verified Aug 3, 2026.

Stage
Seed
HQ
Rockville, MD, US
Instruments
Equity
Tracked investments
9

Team · 13 people

from the firm's website
Ted Sonnenschein· Vice Chairman
Jonathan Cirtain
Nick Williams

What they invest in

from 3 of 9 portfolio companies

Deep Tech ×2Defense Tech ×2Hardware ×2Space Tech ×2EdTech ×1Energy ×1

Investments · 9 tracked

founders shown can be your intro path
Intuitive Machinesintuitivemachines.comNASDAQ: LUNR
X-energyNASDAQ: XE

Developer of advanced small modular nuclear reactors and proprietary fuel technology for clean, zero-carbon, and affordable energy generation.

Axiom Spaceaxiomspace.comin𝕏

Axiom Space develops commercial space stations and provides access to low-Earth orbit microgravity environments for research, manufacturing, and innovation by governments, researchers, and organizations.

Defense TechEdTechHardwareSpace Tech

Dr. Kam Ghaffarian(Executive Chairman)Michael Suffredini(Founder, former CEO and President)

PartnerAnton Brevde· led

Casimirspacecasimirspace.comin𝕏

Casimir develops energy-harvesting microchips that generate power from ambient energy sources, eliminating the need for batteries or external charging.

Deep TechEnergyHardware

PTX

Aerospace engineering services firm supporting government space missions with cutting-edge technical solutions and commercial process efficiencies.

Ptx Llcptx-llc.com
Quantum Spacequantumspace.us

Quantum Space designs and builds the Ranger spacecraft platform, a highly maneuverable spacecraft for space defense, orbital mobility, and cislunar operations.

Deep TechDefense TechSpace Tech<UNKNOWN>

PartnerAnton Brevde· led

Terrionterrion.io

Critical materials company producing engineered graphite for energy, defense, and industrial applications, built on a domestic onshore supply model.

Frequently asked questions

What stage does IBX invest at?
IBX invests at the Seed stage.
What sectors does IBX focus on?
IBX focuses on Deep Tech, Defense Tech, Energy, Space Tech.
Where is IBX located?
IBX is headquartered in Rockville, US.

Media · Podcasts & interviews

featuring the team

DNA of Space Companies, with Anton Brevde (IBX Inc.) - YouTube

Payload · Anton Brevde

Images

IBX photo

Co-investors · 2

Firms observed investing alongside IBX, from public investor directories.

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