The Space Stack

Jeff Bezos space company. First external funding round May 2026. Developing New Glenn heavy-lift rocket and lunar lander. IPO signals emerging as company seeks capital for orbital ambitions.

Building orbital data centers in low Earth orbit to power AI compute with unlimited solar energy — the fastest YC unicorn in history (17 months from founding to unicorn). $170M Series A at $1.1B valuation (March 30, 2026). Satcom infrastructure for defense and commercial markets.

The Boring Company develops tunneling technology and builds underground transportation networks to reduce urban traffic congestion and enable high-speed point-to-point transit.

Overture supersonic passenger jet. United Airlines orders. Major consumer and tech press coverage. Boom Supersonic IPO searches high as test flights continue.

Dream Chaser spaceplane developer. NASA cargo missions. Space station development. Sierra Space IPO candidate as commercial space station market matures.

3D-printed rockets company. Major tech coverage. Multiple successful launches achieved. Relativity Space IPO searches as company approaches profitability.

Private space station builder with NASA contracts. Building commercial space station. Axiom Space IPO searches growing as commercial space expands.

Space and ground network infrastructure for government and commercial communications

In-space manufacturing company producing pharmaceuticals, fiber optics, and advanced materials in microgravity for terrestrial use.

Pioneering the world's first space-based energy grid, wirelessly beaming concentrated solar power to satellites in low Earth orbit.