PRTA

Prothena Corp Public Ltd Co

Company with tickers: PRTA

CIK

1559053

CUSIP

G72800108

Shares Outstanding

52,353,237

13F Activity (30d)

104 filings 100 filers

Weekly off-exchange (dark pool / OTC) trading volume reported to FINRA under its OTC/ATS Transparency data. ATS volume is executed on alternating trading systems (dark pools); non-ATS OTC is other over-the-counter dealer volume. The off-exchange share is total off-exchange volume as a percentage of consolidated weekly trading volume for the same Monday–Friday week.

1M 3M 6M 1Y 5Y All

Off-Exchange Volume History

Week Start	ATS Volume	Non-ATS OTC Volume	Total Off-Exchange	% of FINRA Weekly Volume
2026-05-04	414,396	197,957	612,353	31.3%
2026-04-27	332,213	201,714	533,927	29.5%
2026-04-20	328,879	220,909	549,788	35.6%
2026-04-13	333,853	229,096	562,949	30.3%
2026-04-06	362,812	292,341	655,153	31.8%
2026-03-30	368,671	280,145	648,816	38.1%
2026-03-23	452,828	236,435	689,263	28.1%
2026-03-16	517,013	584,778	1,101,791	32.9%
2026-03-09	632,179	329,348	961,527	29.3%
2026-03-02	550,062	289,706	839,768	27.4%
2026-02-23	492,279	235,853	728,132	33.1%
2026-02-16	447,838	231,572	679,410	37.4%
2026-02-09	306,768	225,824	532,592	32.9%
2026-02-02	422,563	293,794	716,357	30.0%
2026-01-26	395,974	222,825	618,799	30.4%
2026-01-19	596,262	261,452	857,714	35.8%
2026-01-12	578,391	509,544	1,087,935	38.6%
2026-01-05	473,765	319,009	792,774	32.7%
2025-12-29	377,206	304,677	681,883	36.6%
2025-12-22	527,891	266,701	794,592	38.7%
2025-12-15	833,466	839,165	1,672,631	25.1%

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