secwatch / observer

8-K filed May 28, 2026, 12:41 PM ET ticker IONS CIK 0000874015

other material confidence high sentiment positive materiality 0.85

Bepirovirsen Phase 3 achieves 19% functional cure rate in chronic hepatitis B; Q3 2026 FDA decision expected

IONIS PHARMACEUTICALS INC

19% functional cure rate (233/1,220) vs 0% placebo (p<0.001) in overall population (HBsAg ≤3000 IU/mL).
26% functional cure rate in patients with ≤1000 IU/mL HBsAg, representing ~45% of diagnosed CHB cases globally.
49% of bepirovirsen recipients achieved qHBsAg ≤100 IU/mL one year post-treatment in exploratory analysis.
Bepirovirsen under priority FDA review (Breakthrough/Fast Track); first regulatory decisions anticipated in Q3 2026.
Ionis eligible for tiered royalties of 10-12% on net sales plus milestones under 2019 GSK license.

item 7.01 item 8.01 item 9.01

Featured in Daily 8-K Digest

Selected #10 for 2026-05-28. Read digest

Machine-readable event card

schema_version: secwatch.filing_event.v1
accession: 0001140361-26-023093
form_type: 8-K
ticker: IONS
cik: 0000874015
company_name: IONIS PHARMACEUTICALS INC
filed_at: 2026-05-28T16:41:22+00:00
discovered_at: 2026-05-28T16:42:00.705058+00:00
generated_at: 2026-05-28T16:42:18.793427+00:00
sec_items: ["7.01", "8.01", "9.01"]
event_type: other_material
sentiment: positive
materiality_score: 0.85
calibrated_materiality_score: 0.85
confidence: high
secwatch_canonical_url: https://secwatch.observer/filing/0001140361-26-023093
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markdown_url: https://secwatch.observer/filing/0001140361-26-023093.md
text_url: https://secwatch.observer/filing/0001140361-26-023093.txt
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review_status: machine_generated
human_reviewed: false
corrected: false
correction_note: null
correction_timestamp: null
superseded_by: null

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