Pomerantz is investigating five companies after stock drops, including Sionna’s 91.18% plunge when a cystic fibrosis trial missed its key sweat-chloride endpoint.

Finance· Sep 23, 2026

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Sionna, Masovian Voivodeship

village in Masovian, Poland

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SSionna, Masovian Voivodeship· Finance · 8 sources · Sep 23, 2026Story

Pomerantz Investigates Five Companies After Sharp Stock Drops

Pomerantz is investigating five companies after stock drops, including Sionna’s 91.18% plunge when a cystic fibrosis trial missed its key sweat-chloride endpoint.

Finance· Sep 23, 2026

Facts from Wikidata (CC0).

Sionna, Masovian Voivodeship across IJR

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About Sionna, Masovian Voivodeship

Sionna is a village in the administrative district of Gmina Kotuń, within Siedlce County, Masovian Voivodeship, in east-central Poland.

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