NASDAQ · PRTA

Prothena Corporation plc Ordinary Shares

Healthcare · Biotechnology

$8.02

Down-$0.25 (-3.02%)

Updated Oct 7, 2026, 2:08 AM

SID Score

3.6/10

Composite research score

Smart Money

—

Institutional and insider signal

Price performance · PRTA

PRTA price history

1M range · 21 trading sessions · Daily adjusted prices

Prices through Oct 6, 2026

Daily close

View OHLC price history

PRTA OHLC price history, latest 40 sessions
Date	Open	High	Low	Close	Volume
Oct 6, 2026	$8.28	$8.28	$7.80	$8.02	510.61K
Oct 5, 2026	$8.335	$8.37	$7.91	$8.27	714.46K
Oct 2, 2026	$8.62	$8.62	$8.35	$8.36	675.84K
Oct 1, 2026	$8.54	$8.58	$8.35	$8.54	457.09K
Sep 30, 2026	$8.98	$8.99	$8.365	$8.38	634.78K
Sep 29, 2026	$8.66	$8.80	$8.59	$8.78	602.98K
Sep 28, 2026	$8.25	$8.86	$8.0733	$8.72	488.86K
Sep 25, 2026	$8.38	$8.52	$8.185	$8.29	481.05K
Sep 24, 2026	$8.63	$8.73	$8.28	$8.32	426.06K
Sep 23, 2026	$8.94	$8.97	$8.665	$8.68	357.84K
Sep 22, 2026	$8.72	$9.09	$8.70	$8.99	445.5K
Sep 21, 2026	$8.59	$8.795	$8.46	$8.51	363.16K
Sep 18, 2026	$8.41	$8.60	$8.25	$8.58	1.83M
Sep 17, 2026	$8.39	$8.56	$8.23	$8.46	404.76K
Sep 16, 2026	$8.35	$8.50	$8.20	$8.24	398.34K
Sep 15, 2026	$8.86	$8.86	$8.295	$8.33	323.44K
Sep 14, 2026	$8.95	$8.99	$8.79	$8.86	374.87K
Sep 11, 2026	$9.06	$9.14	$8.765	$8.93	376.28K
Sep 10, 2026	$9.25	$9.255	$8.97	$9.02	310.91K
Sep 9, 2026	$9.40	$9.4958	$9.22	$9.30	294.56K
Sep 8, 2026	$9.60	$9.67	$9.345	$9.54	305.44K