Mark Howard Snyder

Companies

• Halozyme TherapeuticsGeneral counsel Jan 5, 2022 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

• HTHalozyme Therapeutics HALO49,929 shares²$6.1M at $121.51Jun 12, 2026

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

Recent filings

• Jun 12, 2026Shares withheld for tax 2,715 shares at $69.50 of Halozyme Therapeutics²
• Jun 12, 2026Exercised options 5,034 shares of Halozyme Therapeutics²
• Feb 23, 2026Shares withheld for tax 3,782 shares at $70.64 of Halozyme Therapeutics³
• Feb 23, 2026Exercised options 7,011 shares of Halozyme Therapeutics³
• Feb 20, 2026Shares withheld for tax 2,876 shares at $70.98 of Halozyme Therapeutics³
• Feb 20, 2026Exercised options 5,332 shares of Halozyme Therapeutics³
• Feb 16, 2026Shares withheld for tax 6,481 shares at $79.44 of Halozyme Therapeutics⁴
• Feb 16, 2026Exercised options 12,016 shares of Halozyme Therapeutics⁴
• Feb 16, 2026Shares withheld for tax 2,587 shares at $79.44 of Halozyme Therapeutics⁴
• Feb 16, 2026Exercised options 4,796 shares of Halozyme Therapeutics⁴
• Jan 3, 2026Shares withheld for tax 4,243 shares at $70.31 of Halozyme Therapeutics⁵
• Jan 3, 2026Exercised options 7,611 shares of Halozyme Therapeutics⁵
• Jun 12, 2025Shares withheld for tax 2,711 shares at $54.54 of Halozyme Therapeutics⁶
• Jun 12, 2025Exercised options 5,035 shares of Halozyme Therapeutics⁶
• Feb 23, 2025Shares withheld for tax 3,775 shares at $57.75 of Halozyme Therapeutics⁷
• Feb 23, 2025Exercised options 7,012 shares of Halozyme Therapeutics⁷
• Feb 16, 2025Shares withheld for tax 2,582 shares at $58.29 of Halozyme Therapeutics⁸
• Feb 16, 2025Exercised options 4,796 shares of Halozyme Therapeutics⁸
• Feb 16, 2025Shares withheld for tax 9,373 shares at $58.29 of Halozyme Therapeutics⁸
• Feb 16, 2025Exercised options 17,409 shares of Halozyme Therapeutics⁸
• Jan 3, 2025Shares withheld for tax 4,289 shares at $47.74 of Halozyme Therapeutics⁹
• Jan 3, 2025Exercised options 7,611 shares of Halozyme Therapeutics⁹
• Feb 16, 2024Shares withheld for tax 2,577 shares at $36.10 of Halozyme Therapeutics¹⁰
• Feb 16, 2024Exercised options 4,796 shares of Halozyme Therapeutics¹⁰
• Jan 3, 2024Shares withheld for tax 2,957 shares at $35.78 of Halozyme Therapeutics¹¹