Brian D. Frantz

Companies

• York Space Systems Inc.Chief Accounting Officer Feb 3, 2026 to now¹
• Summit Materials, Inc.Officer Jan 19, 2024 to Feb 10, 2025²
• Intrepid PotashController & Chief Acctg. Off. Jul 23, 2010 to Feb 28, 2017³
• Intrepid PotashChief financial officer Sep 4, 2014 to Feb 27, 2015⁴

Holdings

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

Shares held

• YSYork Space Systems Inc. YSS5,706 shares⁵$32.3K at $5.66Feb 3, 2026
• SMSummit Materials, Inc.0 shares⁶Feb 10, 2025

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

Recent filings

• Jan 30, 2026Granted 10,294 shares of York Space Systems Inc.⁷
• Feb 10, 2025Returned to company 11,402 shares at $52.50 of Summit Materials, Inc.⁶
• Jan 16, 2025Shares withheld for tax 460 shares at $52.19 of Summit Materials, Inc.⁸
• Jan 16, 2025Granted 1,348 shares of Summit Materials, Inc.⁸
• Feb 29, 2024Shares withheld for tax 1,462 shares at $42.71 of Summit Materials, Inc.⁹
• Feb 29, 2024Exercised options 1,373 shares of Summit Materials, Inc.⁹
• Feb 29, 2024Exercised options 1,285 shares of Summit Materials, Inc.⁹
• Feb 29, 2024Exercised options 1,969 shares of Summit Materials, Inc.⁹