AST SpaceMobile Soars 16% on Rakuten Japan Satellite Joint Venture: “A Key Pillar”
AST SpaceMobile (ASTS) rose 16% after forming a joint venture with Rakuten Group (4755) for a satellite network in Japan, backed by up to $1 billion in government funding. Firefly Aerospace (FLY) and Rocket Lab (RKLB) also gained. AST's Q3 report is expected to detail its cash plan, including a $800 million deal with Firefly for rocket engines. Analysts project AST's revenue to grow to $1.73 billion by 2028.
How this was made
The 30-second read
Why it matters
The announcements collectively drive a multi‑stock rally, indicating material new contracts and funding that could reshape the satellite communications landscape.
Market read
The deal introduces a new, government‑funded satellite network in a major market, creates a sizable revenue stream for engine supplier Firefly, and adds positive sentiment to related space‑tech equities.
What to watch
Potential delays in the 2029 service launch and the reliance on government funding could affect long‑term profitability.
Background
AST SpaceMobile secured a government‑backed joint venture with Rakuten to build a direct‑to‑smartphone satellite network in Japan, accompanied by a large engine contract for Firefly Aerospace and a concurrent earnings release from Rocket Lab.
Ticker impact
AST SpaceMobile announced a joint venture with Rakuten, driving a 16% stock jump.
likely upward pressure as investors price in the new government‑backed contract and $800M engine deal.
The deal includes up to $1B funding and a sizable engine order, both material and newly disclosed.
Rakuten Group (ADR) is a 51% partner in the new Rakuten AST venture, prompting a 16% move in its partner ASTS.
potential modest upside as the partnership expands Rakuten's telecom services.
First public disclosure of the joint venture and sizable government funding.
Firefly Aerospace will supply engines to AST's reusable rocket, lifting its stock 14% on the news.
likely upward pressure as the order represents >50% of FY2026 revenue guidance.
New, material contract disclosed for the first time.
Rocket Lab shares rose 12% after reporting its own earnings and noting the AST partnership.
likely continued upside if its Neutron rocket program stays on track.
Earnings release and related industry news disclosed today.
Market effects
Strengthens the satellite communications and small‑launch sectors, suggesting broader upside for space‑tech stocks.
Highlights Japan's push for domestic satellite services, potentially benefiting other Japanese telecom and tech firms.
Signals increased competition for Starlink in Asia and may influence global satellite‑service valuations.
Counterpoint
The joint venture may face regulatory and execution risks, and the dilution from the engine deal could pressure ASTS earnings.
Key entities
- CompanyAST SpaceMobile
U.S. satellite communications firm launching a joint venture in Japan.
- CompanyRakuten Group
Japanese e‑commerce and telecom conglomerate partnering in the satellite JV.
- CompanyFirefly Aerospace
Engine supplier receiving a large order for AST's reusable rocket.
- CompanyRocket Lab
Space launch provider reporting earnings and noting industry momentum.

