Neal West
Analyst · JPMorgan
Thanks, Keith. Good morning, everyone. I'll begin on Slide 9 with an overview of our shipments and conversion revenue. Conversion revenue for the first quarter was $367 million, a decrease of $2 million or 1% compared to the prior year period.
Looking at each of our end markets in detail, aero and high-strength conversion revenue totaled $137 million in the first quarter of 2024, reflecting a 12% improvement on an 8% increase in shipments over the prior year quarter. The improvement in conversion revenue reflects a mix of higher-priced products along with growth in shipments.
Packaging conversion revenue was $118 million, a decrease of 11% year-over-year, due primarily to a 7% reduction in shipments of higher-priced coated food products, driven by the expected first quarter 2024 destocking. General Engineering Products conversion revenue was $80 million, up slightly year-over-year on a 2% increase in shipments, partially offset by a lower value mix.
And finally, automotive conversion revenue was $31 million, which was relatively flat compared to the first quarter of 2023, driven by a 4% reduction in shipments, offset by improved pricing. Additional details in conversion revenue and shipments by end market applications can be found in the appendix of this presentation.
Now moving to Slide 10. Reported operating income for the first quarter of 2024 was $33 million after adjusting for operating non-run rate items of approximately $1 million, adjusted operating income was $34 million, up 70% year-over-year on improved operating results, offset by a $2.5 million increase in depreciation.
Our effective tax rate continues to be in the low to mid-20% range under current tax regulations. We anticipate that our 2024 cash taxes for foreign and state taxes will be in the $3 million to $4 million range with no US federal cash tax, until we consume our federal NOLs, which as of year-end 2023, were $101 million.
Reported net income for the first quarter 2024 was $25 million or $1.51 net income per diluted share compared to net income of $16 million or $0.99 net income per diluted share of the prior quarter. After adjusting for approximately $1 million of operating non-run rate items previously mentioned and other non-run rate income of $11 million, primarily related to insurance settlements from prior year claims, adjusted net income for the first quarter 2024 was $17 million or $1.02 adjusted net income per diluted share compared to adjusted net income of $7 million or $0.42 adjusted net income per diluted share in the prior year quarter.
Now turning to Slide 11. Adjusted EBITDA for the first quarter of 2024 was $62 million, up approximately $16 million or 34% from the prior year period. Adjusted EBITDA as a percentage of conversion revenue improved approximately 430 basis points from the first quarter of 2023 to 17%. The improvement in adjusted EBITDA was primarily the result of improved operating efficiencies and cost controls in the business, as well as timing of certain annual planned maintenance events and lower freight costs, which was partially offset by higher employee benefit and incentive costs.
Now, turning to a discussion of our balance sheet and cash flow. On March 31, 2024, total cash of approximately $102 million and approximately $517 million of borrowing availability on our revolving credit facility, provided total liquidity of approximately $619 million. There were no borrowings under our revolving credit facility during and as of the quarter end, and it remains undrawn. On March 31, 2024, our net debt leverage ratio continued to improve to 4.2x, as we continue to make progress towards our target leverage ratio of 2x to 2.5x.
Turning to capital allocation. Capital expenditures for the first quarter totaled $30 million. This is lighter than anticipated, attributed primarily to the timing of payments of invoices related to our roll coat 4 project, which remains on track for commissioning later this year. Our full year 2024 capital expenditures are still forecasted to be in the range of $170 million to $190 million. On April 15, we announced that our Board of Directors declared a quarterly dividend of $0.77 per common share, underscoring the continued confidence our board and management team have in our long-term strategy to improve our profitability and increase stockholder value.
And now, I'll turn the call back over to Keith to discuss our outlook. Keith?