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Regeneron faces investigation after trial failure causes 9.8% stock drop

Market News
21 May 2026
PRNewsWire
View Source
Bearish
pluang ai news

Regeneron Pharmaceuticals is under investigation by Pomerantz LLP following disappointing Phase 3 trial results for its melanoma treatment, which failed to show significant improvement over existing therapy. The news led to a nearly 10% drop in Regeneron's stock price. The investigation will examine whether Regeneron and its executives engaged in securities fraud or other unlawful practices. Investors affected may consider joining the class action lawsuit as the case develops.

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