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Prothena Corporation PRTA · USD

Health Care · US listing · 🇺🇸 United States

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8.78

+10.16%

Close of 9 Nov 2026, in USD

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Reference data, closing prices and charts across 45,000 companies, plus crypto, commodities and currencies.

Largest shareholders

As filed, so dates differ, and a group and its funds can both appear.

HolderSharesStakeChangeFiled
FMR LLC7.2m13.37%−352k30 Jun 2026
RUBRIC CAPITAL MANAGEMENT LP5m9.29%—30 Jun 2026
BLACKROCK, INC.4.9m9.04%+223.8k30 Jun 2026
STATE STREET CORP2.4m4.45%+454.9k30 Jun 2026
ACADIAN ASSET MANAGEMENT LLC2m3.74%+463.1k30 Jun 2026
VANGUARD PORTFOLIO MANAGEMENT LLC1.7m3.07%+205.3k30 Jun 2026
D. E. SHAW & CO., INC.1.6m2.99%−151.9k30 Jun 2026
ADAR1 CAPITAL MANAGEMENT, LLC1.6m2.89%−26.9k30 Jun 2026
TWO SIGMA INVESTMENTS, LP1.3m2.35%+59k30 Jun 2026
PALO ALTO INVESTORS LP1.1m2.12%−65.4k30 Jun 2026
GEODE CAPITAL MANAGEMENT, LLC1.1m2.09%+27.7k30 Jun 2026
FEDERATED HERMES, INC.1.1m2.01%+24.6k30 Jun 2026
MORGAN STANLEY995.3k1.85%−235.1k30 Jun 2026
GOLDMAN SACHS GROUP INC979.7k1.82%+160.8k30 Jun 2026
JACOBS LEVY EQUITY MANAGEMENT, INC966k1.79%−6k30 Jun 2026

Short interest

Shares sold short, 15 Oct 2026. US exchange data.

7.9m

-0.9% on the period before. 13.3 days to cover.

Short volume

Share of the day's trading sold short, 4 Nov 2026

65.0%

Last 60 trading days.

Failed deliveries

Shares not delivered on settlement, from the SEC

  • 29 Sept 2026318 shares
  • 24 Sept 20263,531 shares
  • 21 Sept 20265,860 shares
  • 11 Sept 2026535 shares
  • 9 Sept 2026349 shares

Sources and methodology

Data on this tab
Our data supplier
Chart on the Overview
TradingView

Nothing here is investment advice. Prices can be delayed or wrong, so check with the exchange before relying on them. Data for this page. How we cover markets.