Brandon S. Smith

Companies

• PROTHENA CORP PUBLIC LTD COChief operating officer Oct 1, 2021 to now¹
• PROTHENA CORP PUBLIC LTD COChief Business Officer Mar 4, 2020 to Feb 26, 2021²

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

• PPPROTHENA CORP PUBLIC LTD CO PRTA52,000 shares³$442.0K at $8.50Jul 28, 2026

As of each latest filing. The line shows shares held over time.

Recent filings

• Jul 28, 2026Returned to company 78,000 shares at $8.56 of PROTHENA CORP PUBLIC LTD CO³
• Jul 28, 2026Exercised options 78,000 shares of PROTHENA CORP PUBLIC LTD CO³
• Jul 28, 2025Granted 130,000 shares of PROTHENA CORP PUBLIC LTD CO⁴
• Oct 11, 2023Sold 444 shares at $47.74 of PROTHENA CORP PUBLIC LTD CO⁵
• Oct 11, 2023Sold 3,556 shares at $46.62 of PROTHENA CORP PUBLIC LTD CO⁵
• Oct 11, 2023Exercised options 4,000 shares at $11.12 of PROTHENA CORP PUBLIC LTD CO⁵
• Sep 13, 2023Sold 114 shares at $55.96 of PROTHENA CORP PUBLIC LTD CO⁶
• Sep 13, 2023Sold 3,886 shares at $55.48 of PROTHENA CORP PUBLIC LTD CO⁶
• Sep 13, 2023Exercised options 4,000 shares at $11.12 of PROTHENA CORP PUBLIC LTD CO⁶
• Aug 16, 2023Sold 401 shares at $59.91 of PROTHENA CORP PUBLIC LTD CO⁷
• Aug 16, 2023Sold 1,373 shares at $59.15 of PROTHENA CORP PUBLIC LTD CO⁷
• Aug 16, 2023Sold 2,226 shares at $58.22 of PROTHENA CORP PUBLIC LTD CO⁷
• Aug 16, 2023Exercised options 4,000 shares at $11.12 of PROTHENA CORP PUBLIC LTD CO⁷
• Jul 12, 2023Sold 800 shares at $67.95 of PROTHENA CORP PUBLIC LTD CO⁸
• Jul 12, 2023Sold 3,200 shares at $67.40 of PROTHENA CORP PUBLIC LTD CO⁸
• Jul 12, 2023Exercised options 4,000 shares at $11.12 of PROTHENA CORP PUBLIC LTD CO⁸
• Jun 14, 2023Sold 1,362 shares at $75.56 of PROTHENA CORP PUBLIC LTD CO⁹
• Jun 14, 2023Sold 959 shares at $74.69 of PROTHENA CORP PUBLIC LTD CO⁹
• Jun 14, 2023Sold 1,914 shares at $73.35 of PROTHENA CORP PUBLIC LTD CO⁹
• Jun 14, 2023Sold 1,098 shares at $72.52 of PROTHENA CORP PUBLIC LTD CO⁹
• Jun 14, 2023Exercised options 5,333 shares at $11.12 of PROTHENA CORP PUBLIC LTD CO⁹