Mark W. Westphal

Companies

• Post HoldingsPRES., MICHAEL FOODS Feb 5, 2018 to now¹

Holdings

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

Shares held

• Post Holdings POST214,930 shares²$16.7M at $77.49Nov 20, 2025

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

Recent filings

• Nov 18, 2025Granted 3,243 shares of Post Holdings²
• Nov 18, 2025Granted 16,682 shares of Post Holdings²
• Nov 15, 2025Shares withheld for tax 2,521 shares at $106.70 of Post Holdings³
• Nov 14, 2025Shares withheld for tax 2,757 shares at $106.34 of Post Holdings³
• Nov 12, 2025Shares withheld for tax 2,171 shares at $106.02 of Post Holdings⁴
• Nov 12, 2025Exercised options 4,759 shares of Post Holdings⁴
• Nov 12, 2025Shares withheld for tax 1,413 shares at $106.02 of Post Holdings⁴
• Nov 12, 2025Exercised options 3,097 shares of Post Holdings⁴
• Oct 22, 2025Shares withheld for tax 19,658 shares at $107.19 of Post Holdings⁵
• Oct 22, 2025Granted 43,108 shares of Post Holdings⁵
• Nov 16, 2024Shares withheld for tax 2,749 shares at $106.14 of Post Holdings⁶
• Nov 16, 2024Exercised options 6,027 shares of Post Holdings⁶
• Nov 15, 2024Shares withheld for tax 2,521 shares at $107.78 of Post Holdings⁷
• Nov 14, 2024Shares withheld for tax 4,941 shares at $109.47 of Post Holdings⁷
• Nov 14, 2024Shares withheld for tax 2,757 shares at $109.47 of Post Holdings⁷
• Oct 21, 2024Shares withheld for tax 21,436 shares at $115.21 of Post Holdings⁸
• Oct 21, 2024Granted 47,008 shares of Post Holdings⁸
• Nov 17, 2023Shares withheld for tax 2,940 shares at $84.21 of Post Holdings⁹
• Nov 16, 2023Exercised options 6,027 shares of Post Holdings¹⁰
• Nov 16, 2023Shares withheld for tax 2,749 shares at $85.39 of Post Holdings⁹
• Nov 15, 2023Shares withheld for tax 4,724 shares at $85.50 of Post Holdings¹¹
• Nov 15, 2023Shares withheld for tax 2,520 shares at $85.50 of Post Holdings¹¹
• Nov 14, 2023Granted 10,835 shares of Post Holdings¹¹
• Nov 14, 2023Granted 18,133 shares of Post Holdings¹¹
• Oct 24, 2023Shares withheld for tax 18,168 shares at $80.91 of Post Holdings¹²