Sirius Space Services Acquires AMM-42 as It Prepares for Inaugural Flight

Key Takeaways

• Acquires AMM‑42, adding 35 engineers to Sirius
• Enhances in‑house additive manufacturing for engines
• Prepares for Sirius 1B suborbital flight 2027
• Completes vertical integration after SERM purchase
• Supports modular booster strategy across three rocket families

Summary

Sirius Space Services has acquired AMM-42, a high‑precision metal‑component manufacturer employing 35 staff, to bring critical production capabilities in‑house ahead of its Sirius 1B demonstrator flight scheduled for early 2027. The purchase follows a previous acquisition of SERM and expands Sirius's additive‑manufacturing capacity for combustion chambers and turbopumps. Sirius is developing three modular rockets—Sirius 1, 13 and 15—with payload capacities ranging from 175 kg to 1,000 kg. Full‑scale engine tests are planned for the first half of 2026, paving the way for the suborbital flight.

Pulse Analysis

The European small‑launcher landscape is increasingly defined by firms that can produce critical components without relying on external suppliers. Sirius Space Services, a French startup, has positioned itself within this trend by acquiring AMM‑42, a specialist metal‑fabrication firm that survived the 2025 collapse of its former parent, ACI Group. By integrating AMM‑42’s precision machining and additive‑manufacturing expertise, Sirius gains direct access to the tooling needed for high‑performance combustion chambers and turbopumps, reducing lead times and supply‑chain risk.

Beyond the immediate technical benefits, the acquisition signals Sirius’s commitment to a vertically integrated production model. After buying SERM in 2025, the company now controls a broader segment of the value chain, from raw metal processing to final engine assembly. This consolidation enables tighter quality control, faster iteration cycles, and potentially lower unit costs—critical advantages as the company readies its modular booster family. The upcoming full‑scale tests of the Star‑1 engine in early 2026 will be the first major milestone to validate the integrated manufacturing workflow before the Sirius 1B suborbital flight in 2027.

For investors and industry observers, Sirius’s strategy illustrates how emerging launch providers are addressing the classic “valley of death” between prototype and commercial service. By internalizing core manufacturing, the firm can better meet the demanding reliability standards of satellite operators while competing against established players like Arianespace and newer entrants such as Rocket Lab. If the 2027 demonstrator succeeds, Sirius could accelerate its entry into the low‑Earth‑orbit market, offering flexible payload options across its three rocket variants and strengthening Europe’s independent access to space.