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Prothena Corp Public Ltd Co (PRTA) earnings

Quarterly results of Prothena Corp Public Ltd Co as filed with the SEC: revenue, net income and earnings per share for each of the last 8 quarters, the latest results release and when the next one is expected.

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Next earnings date

Prothena Corp Public Ltd Co is expected to report around February 18, 2027. That is an estimate from its filing rhythm (a year after the same report last year), not a date the company has announced.

Latest quarter: Q3 FY2026

In Q3 FY2026 (ended September 30, 2026) Prothena Corp Public Ltd Co reported revenue of $620K (-74.3% on the same quarter a year earlier) and a net loss of $16.5M.

Diluted earnings per share were -$0.32.

Filed with the SEC on November 5, 2026.

Revenue by quarter
Q4 24: $2.1M $2.1M Q4 24Q1 25: $2.8M $2.8M Q1 25Q2 25: $4.4M $4.4M Q2 25Q3 25: $2.4M $2.4M Q3 25Q4 25: $21K $21K Q4 25Q1 26: $51.1M $51.1M Q1 26Q2 26: $1M $1M Q2 26Q3 26: $620K $620K Q3 26
Net income by quarter
Q4 24: -$58M -$58M Q4 24Q1 25: -$60.2M -$60.2M Q1 25Q2 25: -$125.8M -$125.8M Q2 25Q3 25: -$36.5M -$36.5M Q3 25Q4 25: -$21.6M -$21.6M Q4 25Q1 26: $32.7M $32.7M Q1 26Q2 26: -$18.6M -$18.6M Q2 26Q3 26: -$16.5M -$16.5M Q3 26

Quarter by quarter

QuarterEndedRevenuevs year agoNet incomeEPS
Q3 FY2026September 30, 2026$620K-74.3%-$16.5M-$0.32
Q2 FY2026June 30, 2026$1M-77.1%-$18.6M-$0.36
Q1 FY2026March 31, 2026$51.1M+1,706.4%$32.7M$0.60
Q4 FY2025December 31, 2025$21K-99%-$21.6M-
Q3 FY2025September 30, 2025$2.4M--$36.5M-$0.68
Q2 FY2025June 30, 2025$4.4M--$125.8M-$2.34
Q1 FY2025March 31, 2025$2.8M--$60.2M-$1.12
Q4 FY2024December 31, 2024$2.1M--$58M-

Fourth quarters are the fiscal year minus the first three, as most companies report no separate Q4 figures.

Results filings

When is Prothena Corp Public Ltd Co's next earnings date?

Prothena Corp Public Ltd Co is expected to report around February 18, 2027. That is an estimate from its filing rhythm (a year after the same report last year), not a date the company has announced.

What were Prothena Corp Public Ltd Co's latest quarterly results?

For Q3 FY2026, which ended September 30, 2026, Prothena Corp Public Ltd Co reported revenue of $620K and a net loss of $16.5M. The figures come from its filing with the SEC.

Is Prothena Corp Public Ltd Co's revenue growing?

Revenue in Q3 FY2026 was $620K, down 74.3% from $2.4M in the same quarter a year earlier.

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Source: quarterly figures Prothena Corp Public Ltd Co tags in its 10-Q and 10-K filings (SEC EDGAR XBRL). Not investment advice.

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