William D. Porteous

Companies

• BlackSkyBoard member Sep 16, 2021 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

• BBlackSky BKSY807,204 shares²$13.9M at $17.23Sep 14, 2026

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

Recent filings

• Sep 11, 2026Granted 8,733 shares of BlackSky²
• Jun 30, 2026Granted 805 shares of BlackSky³
• Mar 31, 2026Granted 894 shares of BlackSky⁴
• Dec 31, 2025Granted 1,200 shares of BlackSky⁵
• Dec 10, 2025Granted 1,500 shares of BlackSky⁶
• Sep 30, 2025Granted 1,116 shares of BlackSky⁷
• Sep 11, 2025Granted 8,625 shares of BlackSky⁸
• Jun 30, 2025Granted 1,093 shares of BlackSky⁹
• Mar 31, 2025Granted 2,910 shares of BlackSky¹⁰
• Dec 31, 2024Granted 2,085 shares of BlackSky¹¹
• Dec 12, 2024Sold 570 shares at $10.65 of BlackSky¹²
• Sep 30, 2024Granted 4,746 shares of BlackSky¹³
• Sep 4, 2024Granted 135,135 shares of BlackSky¹⁴
• Jun 30, 2024Granted 21,028 shares of BlackSky¹⁵
• Mar 31, 2024Granted 16,544 shares of BlackSky¹⁶
• Dec 31, 2023Granted 16,071 shares of BlackSky¹⁷
• Sep 30, 2023Granted 19,230 shares of BlackSky¹⁸
• Sep 8, 2023Granted 118,110 shares of BlackSky¹⁹
• Sep 9, 2022Granted 69,767 shares of BlackSky²⁰
• Dec 21, 2021Granted 37,641 shares of BlackSky²¹