Dudediligence.

Prothena Corporation plc

PRTANASDAQ · Pharmaceutical Preparations
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Fundamentals

Oldest to newest
Revenue, by quarter
$970,000Sep ’24$2.1MDec ’24$2.8MMar ’25$4.4MJun ’25$2.4MSep ’25$21,000Dec ’25$51.1MMar ’26$1.0MJun ’26
Net income, by quarter
−$59.0MSep ’24−$58.0MDec ’24−$60.2MMar ’25−$125.8MJun ’25−$36.5MSep ’25−$21.6MDec ’25$32.7MMar ’26−$18.6MJun ’26
Fiscal years, by the month each ended
LineDec 2021Dec 2022Dec 2023Dec 2024Dec 2025
Revenue$200.6M$53.9M$91.4M$135.2M$9.7M
Operating income$72.0M−$131.6M−$191.0M−$154.6M−$214.6M
Net income$67.0M−$116.9M−$147.0M−$122.3M−$244.1M
Operating cash flow$92.6M−$108.8M−$133.9M−$150.1M−$163.6M
Cash$579.1M$710.4M$618.8M$471.4M$307.5M
Shares outstanding46.7M52.1M53.7M53.8M53.8M