John C. Plant

Companies

• Howmet AerospaceChair Mar 7, 2019 to now¹
• JabilBoard member Jan 21, 2016 to now²
• MascoBoard member May 8, 2012 to now³
• Howmet AerospaceBoard member Feb 5, 2016 to Apr 4, 2022⁴
• Howmet AerospaceChief executive officer Feb 19, 2019 to Apr 9, 2020⁵
• Gates CorporationBoard member Jan 25, 2018 to Feb 26, 2019⁶

Holdings

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

Shares held

• Howmet Aerospace HWM2,707,911 shares⁷$594.8M at $219.67Feb 18, 2026
• Masco MAS50,574 shares⁸$3.7M at $72.59May 8, 2026
• Jabil JBL6,500 shares⁹$1.8M at $281.26Apr 23, 2026

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

Recent filings

• May 8, 2026Granted 2,650 shares of Masco⁸
• Apr 23, 2026Granted 600 shares of Jabil⁹
• Feb 17, 2026Granted 22,333 shares of Howmet Aerospace⁷
• Jul 1, 2025Granted 255,363 shares of Howmet Aerospace¹⁰
• May 12, 2025Sold 150,000 shares at $156.96 of Howmet Aerospace¹¹
• May 12, 2025Sold 650,000 shares at $156.96 of Howmet Aerospace¹¹
• May 9, 2025Granted 2,900 shares of Masco¹²
• Feb 18, 2025Granted 41,268 shares of Howmet Aerospace¹³
• Jan 24, 2025Sold 46,200 shares at $172.50 of Jabil¹⁴
• Jan 24, 2025Sold 3,800 shares at $173.10 of Jabil¹⁴
• Jan 23, 2025Granted 1,300 shares of Jabil¹⁴
• May 10, 2024Granted 2,490 shares of Masco¹⁵
• Feb 15, 2024Granted 89,142 shares of Howmet Aerospace¹⁶
• Jan 1, 2024Shares withheld for tax 217,610 shares at $54.12 of Howmet Aerospace¹⁷
• Jan 1, 2024Exercised options 500,000 shares of Howmet Aerospace¹⁷
• Nov 21, 2023Gift 102,501 shares of Howmet Aerospace¹⁸
• Nov 21, 2023Gift 140,451 shares of Howmet Aerospace¹⁸
• Nov 21, 2023Gift 242,952 shares of Howmet Aerospace¹⁸
• Oct 19, 2023Granted 1,600 shares of Jabil¹⁹
• May 11, 2023Granted 3,040 shares of Masco²⁰
• Mar 31, 2023Shares withheld for tax 1,128,307 shares at $42.37 of Howmet Aerospace²¹
• Mar 31, 2023Exercised options 2,100,000 shares of Howmet Aerospace²¹
• Mar 31, 2023Exercised options 494,999 shares of Howmet Aerospace²¹
• Dec 6, 2022Gift 284,043 shares of Howmet Aerospace²²
• Dec 6, 2022Gift 284,043 shares of Howmet Aerospace²²

Trade performance

Ranked 30 on our insider buyers board: 9 scored buys, a median of +24.7% against the S&P 500 a year later, and 67% beating it.

Returns are price-only (no dividends), measured from the trade date.