Company: INGN
Filing Date: 2025-02-28
Form Type: S-8
Source: 0000950170-25-030082
Chunk: 1

Company: Inogen Inc
Filing Date: 2025-02-28
Form: S-8
Chunk 1
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 to Section 7(a)(2)(B) of the Securities Act. ☐

This Registration Statement registers on Form S-8 (the “Registration Statement”) 179,069 shares of common stock, par value $0.001 per share (“Common Stock”), reserved for issuance pursuant to future awards under the Registrant’s 2014 Employee Stock Purchase Plan (the “2014 ESPP”) as a result of the annual evergreen increase under the 2014 ESPP. In accordance with Section E of the General Instructions to Form S-8, the contents of the previous registration statements on Form S-8 filed by the Registrant with the Securities and Exchange Commission (the “Commission”) on (i) February 18, 2014 (File No. 333-194016), (ii) May 4, 2015 (File No. 333-203842), (iii) March 14, 2016 (File No. 333-210175), (iv) March 1, 2017 (File No. 333-216352), (v) February 28, 2018 (File No. 333-223280), (vi) February 24, 2023 (File No. 333-270009), and (vii) March 1, 2024 (File No. 333-277601) are incorporated by reference herein. In accordance with the instructional note to Part I of Form S-8 as promulgated by the Commission, the information specified by Part I of Form S-8 has been omitted from this Registration Statement.

# PART II

### INFORMATION REQUIRED IN REGISTRATION STATEMENT
Item 3. Incorporation of Documents by Reference.

The Registrant is subject to the informational and reporting requirements of Sections 13(a), 14 and 15(d) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”) and in accordance therewith files reports, proxy statements and other information with the Commission. The Registrant hereby incorporates by reference into this Registration Statement the following documents previously filed with the Commission:

(1) The Registrant’s Annual Report onForm 10-Kfor the fiscal year ended December 31, 2024, filed with the Commission on February 28, 2025 (the “Annual Report”);

(2) All other reports filed with the Commission pursuant to Section 13(a) or 15(d) of the Exchange Act since the end of the fiscal