PNW SEC filings last scanned 22 Aug 2026, 17:12 UTC
CEO Timeline
Theodore N. GeislerCurrent
Apr 2025 — Present(1y 5mo)
Theodore N. Geisler was appointed Chairman of the Board, President, and Chief Executive Officer of Pinnacle West Capital Corp, effective April 1, 2025, replacing Mr. Guldner.
3 source filings — click to expand
Jeffrey B. Guldner
Nov 2019 — Apr 2025(5y 5mo)
Jeffrey B. Guldner was appointed Chief Executive Officer of Pinnacle West Capital Corporation, succeeding Donald E. Brandt, effective November 15, 2019.
planned retirement
5 source filings — click to expand
Donald E. Brandt
Apr 2009 — Nov 2019(10y 7mo)
Donald E. Brandt was appointed Chairman of the Board and Chief Executive Officer of Pinnacle West Capital Corporation, effective April 30, 2009, succeeding William J. Post.
planned retirement
4 source filings — click to expand
William J. PostManually reviewed
Feb 1999 — Apr 2009(10y 2mo)
William J. Post resigned as Chairman of the Board and Chief Executive Officer of Pinnacle West Capital Corporation, effective April 30, 2009.