About the Company Acadia is a leading provider of behavioral healthcare services across the United States. As of December 31,2024, Acadia operated a network of 262 behavioral healthcare facilities with approximately 11,850 beds in39 states and Puerto Rico. With approximately 25,500 employees serving more than 80,000 patients daily,Acadia is the largest stand-alone behavioral healthcare company in the U.S. Acadia provides behavioralhealthcare services to its patients in a variety of settings, including inpatient psychiatric hospitals, specialtytreatment facilities, residential treatment centers and outpatient clinics. Financial Highlights Cash and cash equivalentsProperty and equipment, netTotal assetsTotal debtStockholders’ equity (1)Please see a reconciliation of GAAP and non-GAAP results beginning on page IV. Fellow Stockholders Acadia Healthcare is proud of our thousands of team members and clinicians who work to deliver critical, lifesaving careto over 80,000 patients facing some of the most complex mental health, addiction and substance use challenges. In 2024, we made significant progress in advancing our strategy, extending our reach and achieving favorable patientoutcomes. Looking ahead, we will continue to drive sustainable, balanced growth through bed additions, de novo buildsand joint venture partnerships while also demonstrating the cash flow generation capabilities of the business. Our variousservice lines allow us to maintain our focus to serve patients across the full care continuum and are aligned to ourstrategy of delivering care to high-acuity and complex needs patient populations. Together with our strong leadership team and committed Board of Directors, we maintain a deep focus on advancingour purpose toLead Care with Light.Additional information about how we are setting the standard for care can be foundat Quality.AcadiaHealthcare.com. The dignity and wellbeing of our patients is at the core of everything we do. As our communities endure an ongoingand unprecedented mental health and addiction crisis with rising rates of serious mental illness and substance usedisorders, Acadia Healthcare remains committed to expanding access and providing specialized care and treatment toall those we serve. Thank you for your continued investment in and support of Acadia Healthcare. Sincerely, Christopher H. HunterChief Executive Officer and Director Safe Harbor Some of the statements made in this letter constitute forward-looking statements within the meaning of The Private Securities LitigationReform Act of 1995. Forward-looking statements include any statements that address future results or occurrences. In some casesyou can identify forward-looking statements by terminology such as “may,” “might, “will,” “should,” “could” or the negative thereof.Generally, the words “anticipate,” “believe,” “continues,” “expect,” “intend,” “estimate,” “project,” “plan” and similar expressions identifyforward-looking statements. In particular, statements about our expectations, beliefs, plans, objectives, assumptions or future events orperformance contained in this letter are forward-looking statements. We have based these forward-looking statements on our current expectations, assumptions, estimates and projections. While we believethese expectations, assumptions, estimates and projections are reasonable, such forward-looking statements are only predictions andinvolve known and unknown risks, uncertainties and other factors, many of which are outside of our control, which could cause ouractual results, performance or achievements to differ materially from any results, performance or achievements expressed or impliedby such forward-looking statements. Given these risks and uncertainties, you are cautioned not to place undue reliance on such forward-looking statements.These risks and uncertainties may cause our actual future results to be materially different than those expressed in our forward-lookingstatements. Additional risks and uncertainties are described more fully in “Risk Factors” in periodic reportsand other filings with the Securities and Exchange Commission. These forward-looking statements are made only as of thedate of this letter. We do not undertake and specifically decline any obligation to update any such statements or to publicly announce the results of anyrevisions to any such statements to reflect future events or developments. Comparative Performance Graph The following graph compares the cumulative total stockholder return on the Company’s common stock with (a) the performanceof a broad equity market indicator and (b) the performance of a published industry index or peer group. In 2022, we selected theS&P 500 as our broad equity market index as we believe it is more commonly used by investors relative to our prior index. Wealso selected the S&P Health Care Services Select Industry Index as our peer group because we believe it is more representativeof healthcare companies that