Austin J. Shanfelter

Companies

• Cardinal Infrastructure Group Inc.Board member Dec 10, 2025 to now¹
• Orion Group Holdings IncBoard member Dec 19, 2007 to now²
• Orion Group Holdings IncChair Sep 14, 2022 to Sep 28, 2022³
• Orion Group Holdings IncChief executive officer May 23, 2022 to May 23, 2022⁴
• Orion Group Holdings IncChief financial officer May 23, 2022 to May 23, 2022⁴
• Orion Group Holdings IncChief operating officer Mar 28, 2019 to Feb 18, 2020⁵
• MasTecBoard member Aug 18, 2003 to Aug 8, 2008⁶
• MasTecChief executive officer Aug 18, 2003 to Aug 9, 2005⁶
• MasTecPresident Aug 18, 2003 to Aug 9, 2005⁶

Holdings

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

Shares held

• MMasTec MTZ326,678 shares⁷$59.0M at $180.50Aug 8, 2008
• OOrion Group Holdings Inc ORN336,451 shares⁸$3.0M at $8.87May 19, 2026
• CICardinal Infrastructure Group Inc. CDNL11,529 shares⁹$176.7K at $15.32Jun 5, 2026

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

Recent filings

• Jun 5, 2026Granted 1,941 shares of Cardinal Infrastructure Group Inc.⁹
• May 19, 2026Granted 7,236 shares of Orion Group Holdings Inc⁸
• May 7, 2026Granted 3,101 shares at $24.18 of Cardinal Infrastructure Group Inc.¹⁰
• Mar 10, 2026Sold 90,000 shares at $12.17 of Orion Group Holdings Inc¹¹
• May 16, 2025Sold 30,000 shares at $8.67 of Orion Group Holdings Inc¹²
• May 15, 2025Granted 11,481 shares at $8.71 of Orion Group Holdings Inc¹²
• May 20, 2024Sold 40,000 shares at $9.01 of Orion Group Holdings Inc¹³
• May 16, 2024Granted 10,695 shares at $9.35 of Orion Group Holdings Inc¹³
• Nov 27, 2023Sold 30,000 shares at $4.86 of Orion Group Holdings Inc¹⁴
• Sep 6, 2023Sold 15,000 shares at $4.76 of Orion Group Holdings Inc¹⁵
• Sep 6, 2023Sold 15,000 shares at $4.74 of Orion Group Holdings Inc¹⁵
• May 18, 2023Granted 34,091 shares of Orion Group Holdings Inc¹⁶
• Mar 1, 2023Shares withheld for tax 62,061 shares at $2.74 of Orion Group Holdings Inc¹⁷
• Mar 1, 2023Shares withheld for tax 60,970 shares at $2.74 of Orion Group Holdings Inc¹⁸
• Mar 1, 2023Exercised options 250,896 shares of Orion Group Holdings Inc¹⁷
• Sep 12, 2022Shares withheld for tax 40,054 shares at $2.75 of Orion Group Holdings Inc¹⁹
• Sep 12, 2022Exercised options 179,211 shares of Orion Group Holdings Inc²⁰
• Sep 12, 2022Granted 179,211 shares at $2.75 of Orion Group Holdings Inc¹⁹
• Aug 8, 2008Sold 300,000 shares at $14.89 of MasTec⁷
• Aug 8, 2008Exercised options 300,000 shares at $10.56 of MasTec⁷
• Dec 20, 2007Sold 15,671 shares at $9.91 of MasTec²¹
• Dec 18, 2007Sold 30,000 shares at $9.91 of MasTec²¹
• Dec 6, 2007Exercised options 124,162 shares at $7.74 of MasTec²²
• Dec 6, 2007Exercised options 25,838 shares at $7.74 of MasTec²²
• Dec 6, 2007Exercised options 150,000 shares at $3.34 of MasTec²²