UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

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FORM SD

SPECIALIZED DISCLOSURE REPORT

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INOGEN, INC.

(Exact name of registrant as specified in its charter)

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Alison Bauerlein

Executive Vice President, Finance,

Chief Financial Officer, Secretary and Treasurer

(805) 562-0500

(Name and telephone number, including area code, of the person to contact in connection with this report.)

__________________________

Check the appropriate box to indicate the rule pursuant to which this form is being filed, and provide the period to which the information in this form applies:

For the reporting period from January 1, 2015 to December 31, 2015, Inogen, Inc. (the “Company”) determined that certain “conflict minerals,” as defined in Section 1, Item 1.01(d)(3) of Form SD, are necessary to the functionality or production of products manufactured by the Company, which are referred to in this Form SD as “necessary conflict minerals.” Accordingly, the Company conducted a reasonable country of origin inquiry to determine whether during 2015 its necessary conflict minerals originated in the Democratic Republic of the Congo or certain adjoining countries, which are referred to in this Form SD collectively as the “covered countries.” The Company then conducted due diligence designed to conform to the Organisation for Economic Co-operation and Development, or OECD, Due Diligence Guidance for Responsible Supply Chains of Minerals from Conflict-Affected and High-Risk Areas in order to determine whether any of the Company’s necessary conflict minerals originated from any of the covered countries and whether these conflict minerals benefitted, directly or indirectly, armed groups in any of the covered countries.

In accordance with Rule 13p-1 promulgated under the Securities Exchange Act of 1934, as amended, and this Specialized Disclosure Report on Form SD, the Company has filed a Conflict Minerals Report, which is attached as Exhibit 1.01 hereto. A copy of this Form SD and the Conflict Minerals Report are publicly available at http://investor.inogen.com/.

In accordance with Rule 13p-1, and this Form SD, the Company has filed its Conflict Minerals Report, which is attached as Exhibit 1.01 to this Form SD.

The following exhibit is filed as part of this Form SD.

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 duly authorized undersigned.

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