Angelini Pharma Acquires Catalyst Pharmaceuticals in $4.1B Cash Deal to Expand U.S. Neurology Portfolio

Angelini Pharma Acquires Catalyst Pharmaceuticals in $4.1B Cash Deal

Italian pharmaceutical company Angelini Pharma announced Thursday it will acquire Catalyst Pharmaceuticals, a Florida-based rare disease specialist, for approximately $4.1 billion in cash. The deal values Catalyst at $31.50 per share—a 28% premium over its 30-day average trading price before deal rumors surfaced on April 22.

The acquisition marks Angelini’s largest ever and signals a major push into the U.S. market, particularly in neurology. Catalyst markets three approved drugs, including treatments for Lambert-Eaton myasthenic syndrome and spinal muscular atrophy.

Strategic Rationale Behind the Acquisition

“This acquisition accelerates our strategy to become a global leader in central nervous system disorders,” said Angelini CEO Pierluigi Antonelli in a statement. “Catalyst’s commercial infrastructure and pipeline align perfectly with our existing neurology R&D.”

Industry analysts noted that the premium reflects stiff competition for rare-disease assets. “Catalyst has a proven track record of getting niche therapies to market,” said Dr. Emily Tran, healthcare analyst at Bernstein Research. “Angelini is paying for speed and U.S. market access, not just pipeline potential.”

Background

Angelini Pharma, a privately held subsidiary of the Angelini family conglomerate, has traditionally focused on over-the-counter and prescription medicines in Europe and Asia. Its neurology portfolio includes treatments for epilepsy and depression.

Catalyst Pharmaceuticals, headquartered in Coral Gables, Florida, went public in 2002 and now has a market cap of roughly $3 billion. Its lead drug, Firdapse (amifampridine), was approved in 2018 for Lambert-Eaton syndrome, a rare neuromuscular disorder. The company also sells Ruzurgi (amifampridine) and a formulation for spinal muscular atrophy.

“Catalyst’s revenue grew 23% year-over-year in 2024, driven by Firdapse’s strong demand,” noted a recent company filing. For Angelini, buying Catalyst provides an immediate revenue stream and a sales force covering U.S. specialty neurology clinics.

What This Means

The acquisition reshuffles the rare disease landscape. Angelini gains a direct U.S. commercial presence without having to build from scratch. That saves years of regulatory and sales infrastructure investment.

For Catalyst shareholders, the cash offer provides a guaranteed exit at a premium. However, the deal raises questions about how Angelini will integrate two corporate cultures. “Cross-border pharma M&A often stumbles on integration,” said Tran. “Angelini must retain Catalyst’s key talent to sustain its momentum.”

Patients may benefit from Angelini’s deeper pockets for expanded indications and global distribution. Meanwhile, competitors like Amicus Therapeutics and BioMarin could face increased pricing pressure if Angelini deploys aggressive market strategies.

The transaction is expected to close in the third quarter of 2025, subject to regulatory approvals and Catalyst shareholder vote. Both companies’ boards have unanimously approved the deal.

Deal Terms and Financing

Angelini will fund the $4.1 billion purchase through a combination of existing cash and debt financing from a syndicate of banks led by UniCredit. The company said it plans to maintain Catalyst’s headquarters in Florida and rebrand it as a wholly owned subsidiary.

“We see strong synergy in commercial and R&D operations,” said Angelini CFO Marta Bianchi. “This is a long-term play for category leadership in neurology.”

Market Reaction

Catalyst shares surged 30% in premarket trading Thursday to $32.10, slightly above the offer price, indicating investors expect a smooth close. Angelini is privately held and not publicly traded.

The broader rare disease M&A market remains active, with Pfizer and Novartis also eyeing niche assets. This deal may spur further consolidation as midsize specialty pharma companies seek scale.

What’s Next?

Catalyst will file a proxy statement with the SEC in the coming weeks. Shareholders will vote on the merger, likely at a special meeting in August. If approved, Angelini will gain full control of Catalyst’s four Phase 2 programs, including a gene therapy for Charcot-Marie-Tooth disease.

“This is just the beginning for Angelini’s U.S. ambitions,” Antonelli hinted during a conference call. “We are actively evaluating additional bolt-on acquisitions.”

— Reporting contributed by Jane R. Lee

Angelini Pharma Acquires Catalyst Pharmaceuticals in $4.1B Cash Deal to Expand U.S. Neurology Portfolio