PRTA Posts Prothena PLC -

2/28/2026 12:53:21 AM

PRTA stock increases 4.8% after hours.

After Hours Gainer

PRTA Prothena PLC -8.67+0.03+0.4%

After Hours:9.09+0.42 (+4.8%)

Prothena Announces up to $100 Million Share Repurchase Plan

Business WireFri, 27-Feb 4:15 PM

2/27/2026 5:21:19 PM

PRTA stock increases 4.7% after hours.

After Hours Gainer

PRTA Prothena PLC -8.67+0.03+0.4%

After Hours:9.08+0.41 (+4.7%)

Prothena Announces up to $100 Million Share Repurchase Plan

Business WireFri, 27-Feb 4:15 PM

2/19/2026 10:06:23 AM

Upcoming Earnings

PRTA Prothena PLC -9.05-0.04 (-0.4%)

Prothena PLC - will report earnings after the market closes. View Calendar The market is expecting a ±4.1% move after earnings are reported. The average move for the past 4 quarters of earnings has been ±3.2%. View Expected Move (Conf Call: Feb 19 4:30 PM)

11/6/2025 10:05:08 AM

Upcoming Earnings

PRTA Prothena PLC -10.25-0.02 (-0.2%)

Prothena PLC - will report earnings after the market closes. View Calendar The market is expecting a ±11.4% move after earnings are reported. The average move for the past 4 quarters of earnings has been ±2.2%. View Expected Move

9/30/2025 10:24:48 AM

Unusual Option Volume

PRTA Prothena PLC -9.64-0.12 (-1.2%)

Prothena PLC - trades 1,710 contracts.

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8/28/2025 10:21:02 AM

Unusual Option Volume

PRTA Prothena PLC -8.45-0.11 (-1.3%)

Prothena PLC - trades 1,400 contracts. News: Prothena Provides Update on PRX012 and Announces Results from the Phase 1 ASCENT Clinical Program

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