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SHAREHOLDER ACTION ALERT: The Schall Law Firm Announces the Filing of a Class Action Lawsuit Against Prothena Corporation plc and Encourages Investors with Losses in Excess of $100,000 to Contact the Firm


Schall Law Firm
, a national shareholder rights litigation firm,
announces the filing of a class action lawsuit against Prothena
Corporation plc (''Prothena" or "the Company") (NASDAQ: PRTA)
for violations of §§10(b) and 20(a) of the Securities Exchange Act of
1934 and Rule 10b-5 promulgated thereunder by the U.S. Securities and
Exchange Commission.

Investors who purchased the Company's shares between October 15, 2015,
and April 20, 2018, inclusive (the "Class Period"), are encouraged to
contact the firm before July 16, 2018.

If you are a shareholder who suffered a loss, click
here to participate

We also encourage you to contact Brian Schall, or Sherin Mahdavian, of
the Schall Law Firm, 1880 Century Park East, Suite 404, Los Angeles, CA
90067, at 424-303-1964, to discuss your rights free of charge. You can
also reach us through the firm's website at,
or by email at

The class, in this case, has not yet been certified, and until
certification occurs, you are not represented by an attorney. If you
choose to take no action, you can remain an absent class member.

According to the Complaint, Prothena made false and misleading
statements to the marketplace. The Company withheld clinical trial data
demonstrating that its antibody, NEOD001, was not a clinically effective
treatment for AL amyloidosis. The Company also made misleading
comparisons of NEOD001's "best response" rate against prior studies.
Prothena made misleading statements about the ongoing Phase 1/2 study of
NEOD001, stating that the study would create a strong foundation for
late-stage Phase 2b and Phase 3 studies of the antibody, while the full
Phase 1/2 data showed the antibody was not an effective treatment.
According to the lawsuit, when accurate information about the Company
became apparent in the market, investors suffered damages.

The Schall Law Firm represents investors around the world and
specializes in securities class action lawsuits and shareholder rights

This press release may be considered Attorney Advertising in some
jurisdictions under the applicable law and rules of ethics.

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