We will refer to some presentation slides today as well as to the earnings release, which we issued this morning. We have also posted the slide presentation and the earnings release under the Investor tab on our website. In our earnings release and filings, we reconcile these non-GAAP measures to GAAP measures. Ian will start today with more detail on our fourth quarter and full year financial results.
Jennifer will provide her perspective on our performance, current market conditions, our multi-year growth initiatives, and go over our outlook for 2026 before we open the line for any questions. Our financial results for the fourth quarter and full year of 2025 are provided in today's earnings report. Before I talk about the fourth quarter, let me highlight some of our full-year consolidated results for 2025. Net sales for the year were $2.18 billion, a record high for the company and an increase of $319 million, or 17% compared to last year.
Organic net sales growth for the year was $205 million, or 11%. Operating income for the year was $340.9 million, an increase of $59.5 million, or 21% from last year. Net income for the year was $246.6 million, an increase of $30.3 million, or 14% from last year. Adjusted EBITDA for the year was $438.9 million, up $88.3 million, or 25% compared to last year.