SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-Q

Commission file number 1-11239

HCA Holdings, Inc.

(Exact name of registrant as specified in its charter)

(Registrant’s telephone number, including area code)

(Former name, former address and former fiscal year, if changed since last report)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  þx    No  o¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 ofRegulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  þx    No  o¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” inRule 12b-2 of the Exchange Act. (Check one):

Indicate by check mark whether the registrant is a shell company (as defined inRule 12b-2 of the Exchange Act).    Yes  o¨    No  þx

Indicate the number of shares outstanding of each of the issuer’s classes of common stock as of the latest practicable date.

On November 17, 2006, HCA Inc. completed its merger with Hercules Acquisition Corporation, pursuant to which the Company was acquired by Hercules Holding II, LLC, a Delaware limited liability company owned by a private investor group comprised of affiliates of Bain Capital Partners, Kohlberg Kravis Roberts & Co., BAML Capital Partners (formerly Merrill Lynch Global Private Equity) (each a “Sponsor”), affiliates of Citigroup Inc. and Bank of America Corporation (the “Sponsor Assignees”) and affiliates of HCA founder, Dr. Thomas F. Frist Jr., (the “Frist Entities,” and together with the Sponsors and the Sponsor Assignees, the “Investors”) and by members of management and certain other investors.

On November 22, 2010, HCA Inc. reorganized by creating a new holding company structure (the “Corporate Reorganization”). HCA Holdings, Inc. became the new parent company, and HCA Inc. is a wholly-owned direct subsidiary of HCA Holdings, Inc. As part of the Corporate Reorganization, HCA Inc.’s outstanding shares of capital stock were automatically converted, on a share for share basis, into identical shares of our common stock. Immediately following the Corporate Reorganization, our amended and restated certificate of incorporation, amended and restated bylaws, executive officers and board of directors were the same as HCA Inc.’s in effect immediately prior to the Corporate Reorganization, and the rights, privileges and interests of HCA Inc.’s stockholders remained the same with respect to us as the new holding company.

During February 2011, our Board of Directors approved an increase in the number of our authorized shares to 1,800,000,000 shares of common stock and a 4.505-to-one split of our issued and outstanding common shares. All common share and per common share amounts in these condensed consolidated financial statements and notes to condensed consolidated financial statements reflect the 4.505-to-one split. During March 2011, we completed the initial public offering of 87,719,300 shares of our common stock at a price of $30.00 per share (before deducting underwriter discounts, commissions and other related offering expenses). Certain of our stockholders also sold 57,410,700 shares of our common stock in this offering. We did not receive any proceeds from the shares sold by the selling stockholders. Our common stock is now traded on the New York Stock Exchange (symbol “HCA”).

The Investors have provided management and advisory services to the Company pursuant to a management agreement among HCA Inc. and the Investors executed in connection with the Investors’ acquisition of HCA Inc. in November 2006. The management agreement was terminated pursuant to its terms upon completion of the initial public offering of our common stock, and the Company paid the Investors a final fee of $181 million. The management agreement also provided that the Company pay a 1% fee in connection with certain financing, acquisition, divestiture and change of control transactions. The Company paid the Investors a fee of $26 million related to the initial public offering of our common stock, and this fee was recorded as a cost of the stock offering.

HCA Holdings, Inc. is a holding company whose affiliates own and operate hospitals and related health care entities. The term “affiliates” includes direct and indirect subsidiaries of HCA Holdings, Inc. and partnerships and joint ventures in which such subsidiaries are partners. At JuneSeptember 30, 2011, these affiliates owned and operated 157 hospitals, 98 freestanding surgery centers and facilities which provided extensive outpatient and ancillary services. Affiliates of HCA Holdings, Inc. are also partners in joint ventures that own and operate seven hospitals and 1314 freestanding surgery centers, which are accounted for using the equity method. HCA Holdings, Inc.’s facilities are located in 20 states and England. The terms “Company,” “HCA,” “we,” “our” or “us,” as used herein and unless otherwise stated or indicated by context, refer to HCA Inc. and its affiliates prior to the Corporate Reorganization and to HCA Holdings, Inc. and its affiliates after the Corporate Reorganization. The terms “facilities” or “hospitals” refer to entities owned and operated by affiliates of HCA and the term “employees” refers to employees of affiliates of HCA.

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles for interim financial information and with the instructions toForm 10-Q and Article 10 ofRegulation S-X. Accordingly, they do not include all the information and footnotes required by generally accepted accounting principles for complete consolidated financial statements. In the opinion of management, all adjustments considered necessary for a fair presentation have been included and are of a normal and recurring nature.

The majority of our expenses are “cost of revenue” items. Costs that could be classified as general and administrative would include our corporate office costs, which were $55$53 million and $44$46 million for the quarters ended JuneSeptember 30, 2011 and 2010, respectively, and $109$162 million and $84$130 million for the sixnine months ended JuneSeptember 30, 2011 and 2010, respectively. Operating results for the quarter and sixnine months ended JuneSeptember 30, 2011 are not necessarily indicative of the results that may be expected for the year ending December 31, 2011. For further information, refer to the consolidated financial statements and footnotes thereto included in our annual report onForm 10-K for the year ended December 31, 2010.

We adopted the provisions of Accounting Standards Update No. 2011-07,Presentation and Disclosure of Patient Service Revenue, Provision for Bad Debts, and the Allowance for Doubtful Accounts for Certain Health Care Entities (“ASU 2011-07”), during the periods ended September 30, 2011. ASU 2011-07 requires health care entities to change the presentation of the statement of operations by reclassifying the provision for doubtful accounts from an operating expense to a deduction from patient service revenues. All periods presented in this Form 10-Q have been reclassified in accordance with ASU 2011-07.

Revenues are recorded during the period the health care services are provided, based upon the estimated amounts due from the patients and third-party payers. Third-party payers include federal and state agencies (under the Medicare, Medicaid and other programs), managed care health plans, commercial insurance companies and employers. Estimates of contractual allowances under managed care health plans are based upon the payment terms specified in the related contractual agreements. Revenues related to uninsured patients and copayment and deductible amounts for patients who have health care coverage may have discounts applied (uninsured discounts and contractual discounts). We also record a provision for doubtful accounts related to uninsured accounts to record the net self pay accounts receivable at the estimated amounts we expect to collect. Our revenues from our third-party payers, the uninsured and other revenues for quarters and nine months ended September 30, 2011 and 2010 are summarized in the following tables (dollars in millions):

NOTE 2 — INCOME TAXES

During the quarter ended September 30, 2011, we finalized a settlement with the Internal Revenue Service (“IRS”) Examination Division resolving all outstanding issues for our 1997 through 2001 tax years.

At JuneSeptember 30, 2011, we were contesting, before the Internal Revenue Service (“IRS”)IRS Appeals Division, certain claimed deficiencies and adjustments proposed by the IRS Examination Division in connection with its audit of HCA Inc.’s 2005 and 2006 federal income tax returns. The disputed items include the timing of recognition of certain patient service revenues, the deductibility of certain debt retirement costs and our method for calculating the tax allowance for doubtful accounts. In addition, eight2002, 2003 and 2004 taxable periods of HCA Inc. and its predecessors ended in 1997 through 2004,, for which the primary remaining issue is the computation of the tax allowance for doubtful accounts, were pending before the IRS Examination Division as of JuneSeptember 30, 2011. The IRS Examination Division began an audit of HCA Inc.’s 2007, 2008 and 2009 federal income tax returns in 2010.

Our liability for unrecognized tax benefits was $399$462 million, including accrued interest of $91$49 million, as of JuneSeptember 30, 2011 ($413 million and $115 million, respectively, as of December 31, 2010). Unrecognized tax benefits of $198$153 million ($190 million as of December 31, 2010) would affect the effective rate, if recognized. The liability for unrecognized tax benefits does not reflect deferred tax assets of $55$38 million ($63 million as of December 31, 2010) related to deductible interest and state income taxes or a refundable deposit of $82$39 million ($82 million as of December 31, 2010), which is recorded in noncurrent assets. The provision for income taxes reflects $2$66 million and $59$5 million ($142 million and $37$3 million, net of tax) in reductions in interest expense related to taxing authority examinations for the quarters ended JuneSeptember 30, 2011 and 2010, respectively, and $26$92 million and $74$79 million ($1658 million and $47$50 million, respectively, net of tax) reductions in interest expense related to taxing authority examinations for the sixnine months ended JuneSeptember 30, 2011 and 2010, respectively.

Depending on the resolution of the IRS disputes, the completion of examinations by federal, state or international taxing authorities, or the expiration of statutes of limitation for specific taxing jurisdictions, we believe it is reasonably possible our liability for unrecognized tax benefits may significantly increase or decline within the next 12 months. However, we are currently unable to estimate the range of any possible change.

NOTE 3 — EARNINGS PER SHARE

We compute basic earnings per share using the weighted average number of common shares outstanding. We compute diluted earnings per share using the weighted average number of common shares outstanding, plus the dilutive effect of outstanding stock options and restricted share units, computed using the treasury stock method.

The following table sets forth the computation of basic and diluted earnings per share for the quarters and sixnine months ended JuneSeptember 30, 2011 and 2010 (dollars in millions, except per share amounts, and shares in thousands):