Gareth T. Joyce

Companies

• Compass MineralsBoard member Oct 13, 2021 to now¹
• Proterra IncBoard member Feb 22, 2022 to Mar 13, 2024²
• Proterra IncChief executive officer Feb 22, 2022 to Mar 13, 2024²
• Proterra IncPresident Jun 16, 2021 to Mar 13, 2024³

Holdings

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

Shares held

• Compass Minerals CMP43,118 shares⁴$943.9K at $21.89Mar 5, 2026
• PProterra Inc0 shares⁵Mar 13, 2024

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

Recent filings

• Mar 5, 2026Exercised options 11,905 shares of Compass Minerals⁴
• Dec 31, 2025Granted 1,401 shares of Compass Minerals⁶
• Sep 30, 2025Granted 1,433 shares of Compass Minerals⁷
• Jun 30, 2025Granted 1,369 shares of Compass Minerals⁸
• Mar 31, 2025Granted 2,961 shares of Compass Minerals⁹
• Mar 5, 2025Exercised options 5,685 shares of Compass Minerals¹⁰
• Dec 31, 2024Granted 2,445 shares of Compass Minerals¹¹
• Sep 30, 2024Granted 2,288 shares of Compass Minerals¹²
• Jun 28, 2024Granted 2,663 shares of Compass Minerals¹³
• Mar 31, 2024Granted 1,748 shares of Compass Minerals¹⁴
• Mar 13, 2024Other 147,772 shares of Proterra Inc⁵
• Feb 15, 2024Exercised options 2,989 shares of Compass Minerals¹⁵
• Jan 2, 2024Sold 16,643 shares at $0.02 of Proterra Inc¹⁶
• Dec 31, 2023Granted 1,087 shares of Compass Minerals¹⁷
• Sep 30, 2023Granted 938 shares of Compass Minerals¹⁸
• Sep 25, 2023Sold 18,925 shares at $0.05 of Proterra Inc¹⁹
• Aug 25, 2023Sold 2,283 shares at $0.07 of Proterra Inc²⁰
• Jun 30, 2023Granted 736 shares of Compass Minerals²¹
• Mar 31, 2023Granted 730 shares of Compass Minerals²²
• Mar 28, 2023Granted 584,632 shares of Proterra Inc²³
• Feb 14, 2023Exercised options 2,125 shares of Compass Minerals²⁴
• Jan 23, 2023Sold 22,534 shares at $5.01 of Proterra Inc²⁵
• Oct 12, 2022Exercised options 615 shares of Compass Minerals²⁶
• Aug 26, 2022Sold 3,334 shares at $6.25 of Proterra Inc²⁷
• Aug 26, 2022Sold 61 shares at $6.12 of Proterra Inc²⁷