NASDAQ · PRTA

Prothena Corporation plc Ordinary Shares

Healthcare · Biotechnology

$9.26

Down-$0.18 (-1.94%)

Updated Aug 13, 2026, 11:29 PM

SID Score

4.4/10

Composite research score

Smart Money

—

Institutional and insider signal

Price performance

PRTA price history

1M range · 21 trading sessions · Daily adjusted prices

Daily close

View OHLC price history

PRTA OHLC price history, latest 40 sessions
Date	Open	High	Low	Close	Volume
Aug 12, 2026	$9.22	$9.31	$9.09	$9.26	274.93K
Aug 11, 2026	$9.12	$9.285	$8.862	$9.22	475.25K
Aug 10, 2026	$8.76	$9.17	$8.53	$9.12	713.69K
Aug 7, 2026	$8.54	$8.85	$8.04	$8.76	481.88K
Aug 6, 2026	$8.50	$8.7664	$8.33	$8.58	418.69K
Aug 5, 2026	$8.49	$8.735	$8.405	$8.49	489.49K
Aug 4, 2026	$8.33	$8.58	$8.33	$8.49	329.91K
Aug 3, 2026	$8.17	$8.38	$8.04	$8.33	566K
Jul 31, 2026	$8.41	$8.51	$8.00	$8.12	545.49K
Jul 30, 2026	$8.50	$8.555	$8.255	$8.41	502.23K
Jul 29, 2026	$8.45	$8.68	$8.39	$8.56	641.22K
Jul 28, 2026	$8.70	$8.78	$8.36	$8.56	802.26K
Jul 27, 2026	$8.88	$9.13	$8.66	$8.70	704.71K
Jul 24, 2026	$8.54	$8.825	$8.35	$8.75	576.84K
Jul 23, 2026	$8.27	$8.625	$8.23	$8.53	532.21K
Jul 22, 2026	$8.69	$8.79	$8.43	$8.44	542.55K
Jul 21, 2026	$8.72	$8.81	$8.51	$8.75	647.64K
Jul 20, 2026	$8.66	$8.85	$8.545	$8.67	549.63K
Jul 17, 2026	$8.40	$8.7993	$8.275	$8.66	408.39K
Jul 16, 2026	$8.40	$8.66	$8.075	$8.47	659.66K
Jul 15, 2026	$8.58	$8.63	$8.42	$8.43	504.69K