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MPM ACQUISITION CORP.

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PART I — FINANCIAL INFORMATION

Item 1.  Financial Statements.

MPM Acquisition Corp.

(A Development Stage Company)

Balance Sheet

See accompanying notes to the financial statements.

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MPM Acquisition Corp.

(A Development Stage Company)

Statement of Operations

(Unaudited)

* Less than $.01 per share

See accompanying notes to the financial statements.

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MPM Acquisition Corp.

(A Development Stage Company)

Statement of Changes in Stockholder’s Equity (Deficit)

Period February 4, 2008 (Inception) through March 31, 2011

(Unaudited)

See accompanying notes to the financial statements.

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MPM Acquisition Corp.

(A Development Stage Company)

Statement of Cash Flows

(Unaudited)

See accompanying notes to the financial statements.

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MPM Acquisition Corp.

(A Development Stage Company)

Notes to Financial Statements

Note 1 — Development Stage Company:

MPM Acquisition Corp., a development stage company (the “Company”), was incorporated in the State of Delaware on February 4, 2008.  The Company is inactive and plans to acquire an existing company or acquire technology to begin operations. The Company is in the development stage.

Note 2 — Summary of Accounting Policies:

Basis of Presentation: The accompanying interim financial statements of the Company have been prepared in accordance with accounting principles generally accepted for interim financial statements presentation and in accordance with the instructions to Regulation S-X. Accordingly, they do not include all of the information and footnotes required by accounting principles generally accepted in the United States of America for complete financial statement presentation. In the opinion of management, all adjustments for a fair statement of the results of operations and financial position for the interim periods presented have been included. All such adjustments are of a normal recurring nature. The accompanying financial statements and the information included under the heading Management’s Discussion and Analysis of Financial Condition and Results of Operations should be read in conjunction with the Company’s audited financial statements and related notes included in the Company’s Form 10-K as of December 31, 2010. Interim results are not necessarily indicative of the results for a full year.

Use of Estimates:  The preparation of the financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the amounts of assets and liabilities and disclosure of contingent asset and liabilities at the date of the financial statements and revenues and expenses during the reporting period.  Actual results could differ from those estimates.

Income Taxes:  The Company utilizes the liability method of accounting for income taxes.  Under the liability method, deferred tax assets and liabilities are determined based on the differences between financial reporting basis and tax basis of the assets and liabilities and are measured using enacted tax rates that will be in effect when the differences are expected to reverse.  A valuation allowance is provided when it is more likely than not, that such tax benefits will not be realized.

The Company recognizes the financial statement benefit of an uncertain tax position only after considering the probability that a tax authority would sustain the position in an examination. For tax positions meeting a “more-likely-than-not” threshold, the amount recognized in the financial statements is the benefit expected to be realized upon settlement with the tax authority. For tax positions not meeting the threshold, no financial statement benefit is recognized.  The Company recognizes interest and penalties, if any, related to uncertain tax positions in income tax expense.  As of March 31, 2011, the Company is unaware of any uncertain tax positions.

Loss per Common Share:  Basic loss per share is calculated using the weighted-average number of common shares outstanding during each period.  Diluted loss per share includes potentially dilutive securities such as outstanding options and warrants, using various methods such as the treasury stock or modified treasury stock method in the determination of dilutive shares outstanding during each period.  The Company does not have any potentially dilutive securities.

Recent Accounting Pronouncements: Management does not believe that any recently issued, but not yet effective accounting pronouncements, if adopted, would have a material effect on the accompanying financial statements.

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Note 3 — Going Concern:

The accompanying financial statements have been prepared assuming that the Company will continue as a going concern, which contemplates the recoverability of assets and the satisfaction of liabilities in the normal course of business. The Company has no revenues and has incurred a net loss from inception of $144,270 which, among other factors, raises substantial doubt about the Company’s ability to continue as a going concern. The ability of the Company to continue as a going concern is dependent upon management’s plan to find a suitable acquisition or merger candidate, raise additional capital from the sale of stock, receive additional loans from its shareholder, and ultimately, income from operations. The accompanying financial statements do not include any adjustments that might be required should the Company be unable to recover the value of its assets or satisfy its liabilities.

Note 4 — Related Party Transactions:

On November 22, 2010, the Company executed and delivered a Demand Promissory Note (the “Note), for a principal amount of up to $100,000, to Radius Health, Inc., an entity whose officers are the same officers as those of the Company. The Note bears interest at 0.41% and is payable within ten (10) business days after demand. As stated in the Note, such demand shall not be made prior to March 31, 2011.

The Company utilizes the office space and equipment of its sole stockholder at no cost.

Note 5 — Preferred Stock :

On February 4, 2008, the Company authorized ten million (10,000,000) shares of $.0001 par value preferred stock with designations, voting and other rights and preferences to be determined from time to time by the board of directors of the Company.

Note 6 — Common Stock :

On February 4, 2008, the Company authorized one hundred million (100,000,000) shares of common stock. On February 4, 2008, the Company issued five million (5,000,000) shares of common stock for $50,000.

Note 7 — Subsequent Events:

On April 25, 2011, the Company entered into an Agreement and Plan of Merger (the “Merger Agreement”) with Radius Health, Inc. (“Radius”), a privately held company incorporated in Delaware, and RHI Merger Corp., a Delaware corporation and a wholly-owned subsidiary of the Company (“Merger Sub”), pursuant to which Merger Sub, subject to certain conditions contained in the Merger Agreement, will merge with and into Radius and Radius will become a wholly-owned subsidiary of the Company (the “Merger”).  Upon completion of the Merger, each outstanding share of Radius Common Stock will automatically convert into the right to receive one share of the Company’s Common Stock and each outstanding share of Radius Preferred Stock will automatically convert into the right to receive one-tenth of a share of the Company’s Preferred Stock from the Company as consideration for the Merger. The Company will assume all outstanding options and warrants of Radius, which shall become exercisable for shares of Company Common Stock or Preferred Stock, as the case may be. Radius and the Company will agree to indemnify each of their officers and directors for their actions relating to the consideration, approval or consummation of the Merger Agreement, in accordance with an indemnity agreement (the “Indemnity Agreement”) to be entered into by and between Radius, the Company and their respective current officers before the closing of the merger.

As a condition to the Merger Agreement, the Company will repurchase all of its currently outstanding shares of common stock effective concurrently with the closing of the merger, (the “Redemption Agreement”) entered into between the Company and its existing shareholders. Conditions to consummating the merger include approval of the shareholders of Radius and other customary conditions. The parties may terminate the Merger Agreement if the merger is not completed by September 30, 2011.

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Item 2.  Management’s Discussion and Analysis of Financial Condition and Results of Operations.

Forward Looking Statement Notice

Certain statements made in this Quarterly Report on Form 10-Q are “forward-looking statements” (within the meaning of the Private Securities Litigation Reform Act of 1995) in regard to the plans and objectives of management for future operations. Such statements involve known and unknown risks, uncertainties and other factors that may cause actual results, performance or achievements of MPM Acquisition Corp. (“we”, “us”, “our” or the “Company”) to be materially different from any future results, performance or achievements expressed or implied by such forward-looking statements. The forward-looking statements included herein are based on current expectations that involve numerous risks and uncertainties. The Company’s plans and objectives are based, in part, on assumptions involving the continued expansion of business. Assumptions relating to the foregoing involve judgments with respect to, among other things, future economic, competitive and market conditions and future business decisions, all of which are difficult or impossible to predict accurately and many of which are beyond the control of the Company. Although the Company believes its assumptions underlying the forward-looking statements are reasonable, any of the assumptions could prove inaccurate and, therefore, there can be no assurance the forward-looking statements included in this Quarterly Report will prove to be accurate. In light of the significant uncertainties inherent in the forward-looking statements included herein, the inclusion of such information should not be regarded as a representation by the Company or any other person that the objectives and plans of the Company will be achieved.

Description of Business

The Company was incorporated in the State of Delaware on February 4, 2008 (Inception) and maintains its principal executive office at c/o MPM Asset Management LLC, 200 Clarendon Street, 54th Floor, Boston, MA 02116.  Since inception, the Company has been engaged in organizational efforts and obtaining initial financing.  The Company was formed as a vehicle to pursue a business combination through the acquisition of, or merger with, an operating business.  The Company filed a Registration Statement on Form 10 with the U.S. Securities and Exchange Commission (the “SEC”) on April 16, 2008, and since its effectiveness, the Company has focused its efforts to identify a possible business combination.

The Company, based on proposed business activities, is a “blank check” company. The SEC defines those companies as “any development stage company that is issuing a penny stock, within the meaning of Section 3(a)(51) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and that has no specific business plan or purpose, or has indicated that its business plan is to merge with an unidentified company or companies.” Many states have enacted statutes, rules and regulations limiting the sale of securities of “blank check” companies in their respective jurisdictions. The Company is also a “shell company,” defined in Rule 12b-2 under the Exchange Act as a company with no or nominal assets (other than cash) and no or nominal operations. Management does not intend to undertake any efforts to cause a market to develop in our securities, either debt or equity, until we have successfully concluded a business combination. The Company intends to comply with the periodic reporting requirements of the Exchange Act for so long as we are subject to those requirements.

The Company was organized as a vehicle to investigate and, if such investigation warrants, acquire a target company or business seeking the perceived advantages of being a publicly held corporation. The Company’s principal business objective for the next 12 months and beyond such time will be to achieve long-term growth potential through a combination with an operating business. The Company will not restrict its potential candidate target companies to any specific business, industry or geographical location and, thus, may acquire any type of business.

The Company currently does not engage in any business activities that provide cash flow.  During the next twelve months we anticipate incurring costs related to:

(i)                                     filing Exchange Act reports, and

(ii)                                  investigating, analyzing and consummating an acquisition.

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We believe we will be able to meet these costs through use of funds in our treasury, through deferral of fees by certain service providers and additional amounts, as necessary, to be loaned to or invested in us by our stockholders, management or other investors. As of the date of the period covered by this report, the Company has $100 in its treasury. There are no assurances that the Company will be able to secure any additional funding as needed.  Currently, however our ability to continue as a going concern is dependent upon our ability to generate future profitable operations and/or to obtain the necessary financing to meet our obligations and repay our liabilities arising from normal business operations when they come due.  Our ability to continue as a going concern is also dependent on our ability to find a suitable target company and enter into a possible reverse merger with such company.  Management’s plan includes obtaining additional funds by equity financing through a reverse merger transaction and/or related party advances, however there is no assurance of additional funding being available.

On April 25, 2011, the Company entered into an Agreement and Plan of Merger (the “Merger Agreement”) with Radius Health, Inc. (“Radius”), a privately held company incorporated in Delaware, and RHI Merger Corp., a Delaware corporation and a wholly-owned subsidiary of the Company (“Merger Sub”), pursuant to which Merger Sub, subject to certain conditions contained in the Merger Agreement, will merge with and into Radius and Radius will become a wholly-owned subsidiary of the Company (the “Merger”).  Upon completion of the Merger, each outstanding share of Radius Common Stock will automatically convert into the right to receive one share of the Company’s Common Stock and each outstanding share of Radius Preferred Stock will automatically convert into the right to receive one-tenth of a share of the Company’s Preferred Stock from the Company as consideration for the Merger. The Company will assume all outstanding options and warrants of Radius, which shall become exercisable for shares of Company Common Stock or Preferred Stock, as the case may be. Radius and the Company will agree to indemnify each of their officers and directors for their actions relating to the consideration, approval or consummation of the Merger Agreement, in accordance with an indemnity agreement (the “Indemnity Agreement”) to be entered into by and between Radius, the Company and their respective current officers before the closing of the merger.

As a condition to the Merger Agreement, the Company will repurchase all of its currently outstanding shares of common stock effective concurrently with the closing of the merger, (the “Redemption Agreement”) entered into between the Company and its existing shareholders. Conditions to consummating the merger include approval of the shareholders of Radius and other customary conditions. The parties may terminate the Merger Agreement if the merger is not completed by September 30, 2011.

The Company filed a Form 8-K with the Securities and Exchange Commission on April 29, 2011.  The Form 8-K included, as attachments, copies of the Merger Agreement and the Redemption Agreement.

The Company filed a Schedule 14f-1 with the Securities and Exchange Commission on April 29, 2011 and made a distribution of such schedule to its sole shareholder.  The Schedule 14f-1 indicates that effective upon the completion of the Merger following the expiration of the ten-day period beginning on the later of the date of the filing of this Information Statement with the SEC pursuant to Rule 14f-1 or the date of mailing of this Information Statement to our Stockholders, the Company expects that it will (i) increase the size of the Board of Directors of Company to seven (7) persons; and (ii) elect to the Board of Directors Alan Auerbach, Jonathan Fleming, Ansbert K. Gadicke, M.D., Kurt Graves, Martin Muenchbach, Ph.D. and Elizabeth Stoner, M.D. In connection with the Merger, Nick Harvey will resign immediately from the Board of Directors. Accordingly, following the Merger, Alan Auerbach, Jonathan Fleming, Ansbert K. Gadicke, M.D., Kurt Graves, C. Richard Lyttle, Ph.D., Martin Muenchbach, Ph.D. and Elizabeth Stoner, M.D. will constitute the entire Board of Directors. Upon the effectiveness of the appointments and resignations contemplated in the Schedule 14f-1 of April 29, 2011, the Company will file a Form 8-K.

If the Merger is not completed, the Company may consider acquiring a different business which has recently commenced operations, is a developing company in need of additional funds for expansion into new products or markets, is seeking to develop a new product or service, or is an established business which may be experiencing financial or operating difficulties and is in need of additional capital. In the alternative, a business combination may involve the acquisition of, or merger with, a company which does not need substantial additional capital but which desires to establish a public trading market for its shares while avoiding, among other things, the time delays, significant expense, and loss of voting control which may occur in a public offering.

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Since our Registration Statement on Form 10 went effective, our management has had contact and discussions with representatives of other entities regarding a business combination with us. Any target business that is selected may be a financially unstable company or an entity in its early stages of development or growth, including entities without established records of sales or earnings. In that event, we will be subject to numerous risks inherent in the business and operations of financially unstable and early stage or potential emerging growth companies. In addition, we may effect a business combination with an entity in an industry characterized by a high level of risk, and, although our management will endeavor to evaluate the risks inherent in a particular target business, there can be no assurance that we will properly ascertain or assess all significant risks. Our management anticipates that it will likely be able to effect only one business combination, due primarily to our limited financing and the dilution of interest for present and prospective stockholders, which is likely to occur as a result of our management’s plan to offer a controlling interest to a target business in order to achieve a tax-free reorganization. This lack of diversification should be considered a substantial risk in investing in us, because it will not permit us to offset potential losses from one venture against gains from another.

The Company anticipates that the selection of a business combination will be complex and extremely risky. Because of general economic conditions, rapid technological advances being made in some industries and shortages of available capital, our management believes that there are numerous firms seeking even the limited additional capital which we will have and/or the perceived benefits of becoming a publicly traded corporation. Such perceived benefits of becoming a publicly traded corporation include, among other things, facilitating or improving the terms on which additional equity financing may be obtained, providing liquidity for the principals of and investors in a business, creating a means for providing incentive stock options or similar benefits to key employees, and offering greater flexibility in structuring acquisitions, joint ventures and the like through the issuance of stock. Potentially available business combinations may occur in many different industries and at various stages of development, all of which will make the task of comparative investigation and analysis of such business opportunities extremely difficult and complex.

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Liquidity and Capital Resources

As of March 31, 2011, the Company had assets of $100, comprised exclusively of cash.  This compares with assets of $100 as of December 31, 2010, comprised exclusively of cash.  The Company’s current liabilities as of March 31, 2011 totaled $94,370, comprised of $6,750 in accounts payable and $87,620 of monies due to stockholder.  This compares with liabilities of $84,227 as of December 31, 2010, comprised of $7,357 in accounts payable and $76,870 of monies due to stockholder.  The Company can provide no assurance that it can continue to satisfy its cash requirements for at least the next twelve months.

The following is a summary of the Company’s cash flows provided by (used in) operating, investing, and financing activities:

The Company has nominal assets and has generated no revenues since inception. The Company is also dependent upon the receipt of capital investment or other financing to fund its ongoing operations and to execute its business plan of seeking a combination with a private operating company. In addition, the Company is dependent upon certain related parties to provide continued funding and capital resources. If continued funding and capital resources are unavailable at reasonable terms, the Company may not be able to implement its plan of operations.

Results of Operations

The Company has not conducted any active operations since inception, except for its efforts to locate suitable acquisition candidates. No revenue has been generated by the Company from February 4, 2008 (Inception) through March 31, 2011.  It is unlikely the Company will have any revenues unless it is able to effect an acquisition or merger with an operating company, of which there can be no assurance.  It is management’s assertion that these circumstances may hinder the Company’s ability to continue as a going concern.  The Company’s plan of operation for the next twelve months shall be to continue its efforts to locate suitable acquisition candidates.

For the three months ended March 31, 2011, the Company had a net loss of $10,143, consisting of legal, accounting, audit and other professional service fees incurred in relation to the filing of the Company’s Quarterly and Annual Reports on Form 10-Q and Form 10-K.

For the three months ended March 31, 2010, the Company had a net loss of $9,711, consisting of legal, accounting, audit and other professional service fees incurred in relation to the filing of the Company’s Quarterly and Annual Reports on Form 10-Q and Form 10-K.

For the period from February 4, 2008 (Inception) through March 31, 2011, the Company had a net loss of $144,270, consisting of legal, accounting, audit and other professional service fees incurred in relation to the formation of the Company, the filing of the Company’s Registration Statement on Form 10 in April of 2008 and the filing of the Company’s Quarterly and Annual Reports on Form 10-Q and Form 10-K.

Off-Balance Sheet Arrangements

The Company does not have any off-balance sheet arrangements that have or are reasonably likely to have a current or future effect on the Company’s financial condition, changes in financial condition, revenues or expenses, results of operations, liquidity, capital expenditures or capital resources that is material to investors.

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Contractual Obligations

As a “smaller reporting company” as defined by Item 10 of Regulation S-K, the Company is not required to provide this information.

Item 3.  Quantitative and Qualitative Disclosures About Market Risk.

As a “smaller reporting company” as defined by Item 10 of Regulation S-K, the Company is not required to provide information required by this Item.

Item 4.  Controls and Procedures.

Evaluation of Disclosure Controls and Procedures

We maintain disclosure controls and procedures that are designed to ensure that information required to be disclosed in our reports filed pursuant to the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules, regulations and related forms, and that such information is accumulated and communicated to our principal executive officer and principal financial officer, as appropriate, to allow timely decisions regarding required disclosure.

As of March 31, 2011, we carried out an evaluation, under the supervision and with the participation of our principal executive officer and our principal financial officer of the effectiveness of the design and operation of our disclosure controls and procedures. Based on this evaluation, our principal executive officer and our principal financial officer concluded that our disclosure controls and procedures were effective as of the end of the period covered by this report.

Changes in Internal Controls

There have been no changes in our internal controls over financial reporting during the quarter ended March 31, 2011 that have materially affected or are reasonably likely to materially affect our internal controls.

PART II — OTHER INFORMATION

Item 1.  Legal Proceedings.

There are presently no material pending legal proceedings to which the Company, any of its subsidiaries, any executive officer, any owner of record or beneficially of more than five percent of any class of voting securities is a party or as to which any of its property is subject, and no such proceedings are known to the Registrant to be threatened or contemplated against it.

Item 1A.  Risk Factors.

As a “smaller reporting company” as defined by Item 10 of Regulation S-K, the Company is not required to provide information required by this Item.

Item 2.  Unregistered Sales of Equity Securities and Use of Proceeds.

None.

Item 3.  Defaults Upon Senior Securities.

None.

Item 4.  Removed and Reserved.

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Item 5.  Other Information.

None.

Item 6.  Exhibits.

*                                         Filed as an exhibit to the Company’s Registration Statement on Form 10, as filed with the SEC on April 16, 2008 and incorporated herein by this reference.

**                                  Filed as an exhibit to the Company’s Current Report on Form 8-K, as filed with the SEC on April 29, 2011 and incorporated herein by this reference.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

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