Matthew Scott Harris

Companies

• Altimmune, Inc.Chief Medical Officer Sep 11, 2019 to now¹
• Altimmune, Inc.Board member Nov 13, 2020 to Nov 13, 2020²

Holdings

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

Shares held

• AAltimmune, Inc. ALT83,874 shares³$194.8K at $2.32Aug 4, 2025

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

Recent filings

• Jul 31, 2025Granted 2,018 shares at $3.14 of Altimmune, Inc.³
• Mar 7, 2025Gift 67,787 shares of Altimmune, Inc.⁴
• Feb 2, 2025Shares withheld for tax 2,708 shares at $6.64 of Altimmune, Inc.⁵
• Feb 2, 2025Exercised options 7,775 shares of Altimmune, Inc.⁵
• Feb 1, 2025Shares withheld for tax 2,109 shares at $6.64 of Altimmune, Inc.⁵
• Feb 1, 2025Exercised options 6,166 shares of Altimmune, Inc.⁵
• Jan 31, 2025Granted 1,905 shares at $5.18 of Altimmune, Inc.⁵
• Jan 30, 2025Shares withheld for tax 3,173 shares at $7.00 of Altimmune, Inc.⁵
• Jan 30, 2025Exercised options 9,275 shares of Altimmune, Inc.⁵
• Jan 25, 2025Shares withheld for tax 4,994 shares at $6.98 of Altimmune, Inc.⁶
• Jan 25, 2025Exercised options 14,600 shares of Altimmune, Inc.⁶
• Jul 31, 2024Granted 1,486 shares at $5.41 of Altimmune, Inc.⁷
• Feb 2, 2024Shares withheld for tax 2,332 shares at $9.32 of Altimmune, Inc.⁸
• Feb 2, 2024Exercised options 7,775 shares of Altimmune, Inc.⁸
• Feb 1, 2024Shares withheld for tax 1,801 shares at $9.88 of Altimmune, Inc.⁸
• Feb 1, 2024Exercised options 6,166 shares of Altimmune, Inc.⁸
• Jan 31, 2024Granted 3,257 shares at $2.69 of Altimmune, Inc.⁹
• Jan 30, 2024Shares withheld for tax 2,709 shares at $9.80 of Altimmune, Inc.⁹
• Jan 30, 2024Exercised options 9,275 shares of Altimmune, Inc.⁹
• Jul 31, 2023Granted 691 shares at $2.81 of Altimmune, Inc.¹⁰
• Mar 23, 2023Bought 10,000 shares at $4.22 of Altimmune, Inc.¹¹
• Feb 2, 2023Shares withheld for tax 2,364 shares at $15.04 of Altimmune, Inc.¹²
• Feb 2, 2023Exercised options 7,775 shares of Altimmune, Inc.¹²
• Feb 1, 2023Shares withheld for tax 2,183 shares at $13.78 of Altimmune, Inc.¹³
• Feb 1, 2023Exercised options 6,166 shares of Altimmune, Inc.¹³