Horizon Pharma to Acquire Hyperion Therapeutics for $1.1 Billion

Palo Alto – March 31, 2015 – Cooley is advising Horizon Pharma plc on its agreement to acquire Hyperion Therapeutics for $1.1 billion in an all cash transaction and related debt commitments.

Horizon Pharma plc, which is headquartered in Dublin, Ireland, is a specialty biopharmaceutical company focused on improving patients' lives by identifying, developing, acquiring and commercializing differentiated products that address unmet medical needs. The company markets a portfolio of products in arthritis, inflammation and orphan diseases. Hyperion Therapeutics is a commercial-stage biopharmaceutical company committed to developing and delivering life-changing treatments for orphan diseases.

Earlier this month, Cooley advised Horizon Pharma and Horizon Pharma Investments Limited on its Rule 144A offering of $400 million aggregate principal amount of exchangeable senior notes due 2022.

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