Amgen Shares Fall as Novartis' Pelacarsen Misses Phase III Study Goal
Amgen shares fell 5% after Novartis' pelacarsen failed to meet its primary endpoint in a phase III study, raising concerns about Lp(a)-lowering therapies. Amgen's olpasiran, also targeting Lp(a), is under investigation. Novartis and Ionis shares also declined. Year-to-date, Amgen shares are up 36.3%.
How this was made

The 30-second read
Why it matters
The negative trial result undermines confidence in Lp(a)-lowering strategies, pressuring stocks of companies with similar programs.
Market read
Immediate price declines for AMGN, NVS, and IONS reflect market reassessment of Lp(a) therapeutic prospects.
What to watch
Potential for Novartis to pivot pelacarsen to other indications or combine with different endpoints.
Background
The article reports the first public disclosure of Novartis's Phase III Lp(a)HORIZON trial failure and its immediate market impact on related companies.
Ticker impact
Amgen shares fell 5% in after‑hours trading after Novartis reported its Phase III pelacarsen trial missed the primary endpoint.
Potential further downside if olpasiran data remain inconclusive.
Investors link Novartis failure to Amgen's similar program, increasing risk perception.
Novartis announced that its Phase III Lp(a)HORIZON study of pelacarsen failed to meet the primary endpoint.
Short‑term price pressure as investors reassess Lp(a) pipeline.
First‑report of a pivotal Phase III failure for a major cardiovascular program.
Ionis Pharmaceuticals shares declined after the announcement of the failed pelacarsen trial, for which it holds global rights.
Likely further sell‑off if no alternative pipeline news emerges.
Ionis's commercial prospects for pelacarsen are directly tied to trial outcome.
Market effects
Lipoprotein(a) therapeutic space faces heightened scrutiny, potentially affecting other biotech Lp(a) programs.
US biotech sector may see broader sell pressure in the short term.
International investors tracking cardiovascular drug pipelines will reassess exposure.
Counterpoint
If olpasiran data later show a clear outcome, Amgen could rebound despite current skepticism.
Key entities
- CompanyAmgen Inc.
Biotech firm developing olpasiran, an Lp(a) siRNA therapy.
- CompanyNovartis AG
Pharmaceutical company whose pelacarsen trial failed.
- CompanyIonis Pharmaceuticals
Partner holding global rights to pelacarsen.


