NASDAQ · PRTA

Prothena Corporation plc Ordinary Shares

Healthcare · Biotechnology

$9.02

Down-$0.28 (-3.01%)

Updated Sep 11, 2026, 5:54 AM

SID Score

4.3/10

Composite research score

Smart Money

—

Institutional and insider signal

Price performance

PRTA price history

1M range · 20 trading sessions · Daily adjusted prices

Daily close

View OHLC price history

PRTA OHLC price history, latest 40 sessions
Date	Open	High	Low	Close	Volume
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
Sep 4, 2026	$9.50	$9.87	$9.48	$9.82	383.93K
Sep 3, 2026	$9.77	$9.78	$9.5119	$9.60	277.06K
Sep 2, 2026	$9.64	$9.75	$9.37	$9.685	341.06K
Sep 1, 2026	$9.28	$9.63	$9.26	$9.61	267.67K
Aug 31, 2026	$9.26	$9.40	$9.1001	$9.35	335.15K
Aug 28, 2026	$9.02	$9.479	$8.95	$9.33	498.12K
Aug 27, 2026	$9.16	$9.24	$8.95	$9.09	338.92K
Aug 26, 2026	$9.40	$9.40	$9.1533	$9.25	289.04K
Aug 25, 2026	$9.51	$9.82	$9.42	$9.42	363.71K
Aug 24, 2026	$9.46	$9.49	$9.19	$9.39	248.12K
Aug 21, 2026	$9.11	$9.52	$9.09	$9.45	376.04K
Aug 20, 2026	$9.13	$9.145	$8.71	$9.03	345.97K
Aug 19, 2026	$8.91	$9.34	$8.91	$9.29	385.54K
Aug 18, 2026	$8.88	$9.00	$8.58	$8.71	248.56K
Aug 17, 2026	$8.84	$9.075	$8.729	$8.88	365.92K
Aug 14, 2026	$9.04	$9.15	$8.8387	$8.86	312.6K
Aug 13, 2026	$9.30	$9.365	$9.04	$9.08	343.06K