Pinnacle West Beats Estimates Again, ESP Points to Further Upside

TL;DR: Pinnacle West (PNW) reported earnings of $0.13 per share, beating the $0.05 consensus by 160%, extending a run of surprises that averaged 85.76% over the last two quarters. The stock’s Zacks Earnings ESP of +40% reflects recent analyst bullishness and hints at another potential beat.

Pinnacle West operates as a holding company for Arizona Public Service, a regulated electric utility serving over 1.3 million customers. Utilities typically exhibit steady earnings, making surprise magnitudes notable when they occur. The company’s market capitalization stands near $4.8 billion, and its shares traded up roughly 2.3% on the day of the earnings release, outperforming the S&P 500 Utilities Index which rose 0.7% in the same period.

In the most recent quarter, PNW posted $0.13 earnings per share versus a Zacks Consensus Estimate of $0.05, a surprise of 160%. The prior quarter saw earnings of $3.39 per share against an estimate of $3.04, delivering an 11.51% beat. Over these two periods the average surprise is 85.76%, underscoring a consistent pattern of outperformance.

The Zacks Earnings ESP measures the difference between the Most Accurate Estimate—reflecting the latest analyst revisions—and the broader Consensus Estimate. A positive ESP indicates that analysts have recently raised their expectations, often presaging a beat. At +40.00%, PNW’s ESP suggests meaningful upward revision in the weeks ahead.

For investors, the combination of a positive ESP and a Zacks Rank of #3 (Hold) historically yields a surprise about 70% of the time. While past performance does not guarantee future results, the current metrics align with conditions that have preceded earlier beats.

Watch for the next earnings release scheduled for May 4, 2026, and any interim analyst estimate revisions that could shift the ESP further.