A legacy built on trust

We've spent more than 120 years focused on what matters.

For more than 120 years, we’ve focused on one thing: making anti-infective medicines the world depends on — reliably, consistently, and at scale.

Because in this category, supply is not just operational. It’s critical.

Fermentation-based manufacturing is complex. It requires deep expertise, long-term investment, and the ability to manage uncertainty over time. The molecules cannot be rushed — and neither can the decisions behind them.

That’s why our role goes beyond production. We work with our partners to ensure continuity — not just delivery. To anticipate challenges before they surface, and to stay aligned as requirements evolve.

As the category changes — with rising resistance, tightening regulation, and increasing pressure on supply chains — we continue to expand our capabilities, strengthen our portfolio, and invest ahead of demand.

When you partner with Xellia, you’re not just securing supply for today. You’re building confidence in what comes next.