Chris Forsythe
Senior Vice President and Chief Financial Officer at Atmos Energy
Thank you, Dan, and good morning everyone. We appreciate you joining us and your interest in Atmos Energy. Yesterday, we announced fiscal year-to-date, diluted earnings per share of $5.33 compared to $5.12 per diluted share in the prior year period. Our third-quarter and fiscal year-to-date financial results were in line with our expectations and continued to be driven by three key themes; regulatory outcomes reflecting increased safety and reliability spending, continued strong customer growth, and higher O&M spending.
Fiscal '22 and '23 regulatory outcomes in both of our segments increased operating income by approximately $204 million and higher consumption residential customer growth, enlighting[phonetic] industrial load in our distribution segment increased operating income by an additional $27 million. These increases were partially offset by $70 million increase in consolidated O&M. Year-to-date distribution O&M increased $48 million or 12.6%. However, during the third fiscal quarter, the rate of O&M increase in this segment moderated somewhat as O&M increasing approximately 3.5% quarter over quarter.
The higher level of O&M spending continues to be largely driven by higher levels of service orders to support our growing service territory, primarily in Texas. Fiscal year-to-date, we experienced an 8% increase in the number of line located in Texas, and we continue to see higher labor costs release third-party services. Additionally, service orders increased 10%, largely driven by customer growth and increasing customer collection activities. The remaining $23 million of fiscal year to date increase in consolidated O&M incurred in our pipeline and storage segment, primarily driven by the timing of in-line inspection work for this segment.
In the prior fiscal year most of that work was concentrated in the fourth-quarter. In this fiscal year this work was incurred more ratably throughout the fiscal year. Consolidated capital spending increased 21% or $358 million to $2.1 billion with 86% dedicated to improving the safety and reliability of our system. This increase primarily reflects higher spending of APT or allowing us to in-line PC projects designed to enhance the safety, reliability, versatility, and supply diversification of our system. Depending[phonetic] our distribution segment has increased due to higher safety line reliability spending and higher spending to support customer growth.
During our third fiscal quarter, we implemented $122 million in annualized regulatory outcomes. Year-to-date, we have now completed $263 million of annualized regulatory outcomes. We currently have an additional $263 million in annualized outcomes and progress, including $107 million related to our APT general rate case that we filed in May of this year. We currently expect to finalize that case in December of 2023. Our financial position continues to remain strong. We finished our third fiscal quarter with an equity capitalization of 61.8% and approximately $3.1 billion of liquidity. This amount includes $590 million of net proceeds available under existing forward sale agreements that will fully satisfy our anticipated fiscal '23 equity needs and a significant portion of our anticipated fiscal '24 needs.
Additionally, during our third fiscal quarter, we completed our $95 million securitization process in Kansas and began including securitization charge on customer bills effective July first. As I previously mentioned, our third-quarter and fiscal year to date results were in line for expectations, which gives us the confidence to reaffirm our fiscal '23 guidance in the range of $6 to $6.10. Additionally, we now expect capital spending to approximately $2.8 billion, largely reflecting higher spending persistent expansion of distribution segment. Thank you for your time today and I will turn the call over to Kevin for his update and some closing remarks. Kevin?