AVDL Stock Alert: Halper Sadeh LLC Is Investigating Whether the Sale of Avadel Pharmaceuticals plc Is Fair to Shareholders

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NEW YORK--(BUSINESS WIRE)--Oct 22, 2025--

Halper Sadeh LLC, an investor rights law firm, is investigating whether the sale of Avadel Pharmaceuticals plc (NASDAQ: AVDL) to Alkermes plc is fair to Avadel shareholders. Under the terms of the proposed transaction, Avadel shareholders will receive $18.50 per share, plus a non-transferable contingent value right entitling holders to a potential additional cash payment of $1.50 per share, contingent upon final FDA approval of LUMRYZ™ for the treatment of idiopathic hypersomnia in adults by the end of 2028.

Halper Sadeh encourages Avadel shareholders to click here to learn more about their legal rights and options or contact Daniel Sadeh or Zachary Halper at (212) 763-0060 or [email protected] or [email protected].

The investigation concerns whether Avadel and its board of directors violated the federal securities laws and/or breached their fiduciary duties to shareholders by failing to, among other things: (1) obtain the best possible consideration for Avadel shareholders; (2) determine whether Alkermes is underpaying for Avadel; and (3) disclose all material information necessary for Avadel shareholders to adequately assess and value the merger consideration.

On behalf of Avadel shareholders, Halper Sadeh LLC may seek increased consideration for shareholders, additional disclosures and information concerning the proposed transaction, or other relief and benefits. We would handle the action on a contingent fee basis, whereby you would not be responsible for out-of-pocket payment of our legal fees or expenses.

Halper Sadeh LLC represents investors all over the world who have fallen victim to securities fraud and corporate misconduct. Our attorneys have been instrumental in implementing corporate reforms and recovering millions of dollars on behalf of defrauded investors.

Attorney Advertising. Prior results do not guarantee a similar outcome.

View source version on businesswire.com:https://www.businesswire.com/news/home/20251022741605/en/

CONTACT: Halper Sadeh LLC

One World Trade Center

85th Floor

New York, NY 10007

Daniel Sadeh, Esq.

Zachary Halper, Esq.

(212) 763-0060

[email protected]

[email protected]

https://www.halpersadeh.com

KEYWORD: UNITED STATES NORTH AMERICA NEW YORK

INDUSTRY KEYWORD: CLASS ACTION LAWSUIT PROFESSIONAL SERVICES LEGAL

SOURCE: Halper Sadeh LLC

Copyright Business Wire 2025.

PUB: 10/22/2025 08:04 AM/DISC: 10/22/2025 08:05 AM

http://www.businesswire.com/news/home/20251022741605/en