# EDGAR Filing Document

**Accession Number:** 0001294133
**File Stem:** 0001193125-26-088606
**Filing Date:** 2026-3
**Character Count:** 8502
**Document Hash:** 2eb13d864b28e9aeaf2b03cb584aab10
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-088606.hdr.sgml**: 20260303

**ACCESSION NUMBER**: 0001193125-26-088606

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260227

**FILED AS OF DATE**: 20260303

**DATE AS OF CHANGE**: 20260303

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Yi Boyer Jennifer M
- **CENTRAL INDEX KEY:** 0002079957

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-36309
- **FILM NUMBER:** 26715946

**MAIL ADDRESS:**
- **STREET 1:** 859 WARD DRIVE
- **CITY:** GOLETA
- **STATE:** CA
- **ZIP:** 93111
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Inogen Inc
- **CENTRAL INDEX KEY:** 0001294133
- **STANDARD INDUSTRIAL CLASSIFICATION:** ORTHOPEDIC, PROSTHETIC & SURGICAL APPLIANCES & SUPPLIES [3842]
- **ORGANIZATION NAME:** 08 Industrial Applications and Services
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 500 CUMMINGS CENTER
- **STREET 2:** SUITE 2800
- **CITY:** BEVERLY
- **STATE:** MA
- **ZIP:** 01915
- **BUSINESS PHONE:** 805-562-0500

**MAIL ADDRESS:**
- **STREET 1:** 500 CUMMINGS CENTER
- **STREET 2:** SUITE 2800
- **CITY:** BEVERLY
- **STATE:** MA
- **ZIP:** 01915

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

[ ] Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Yi Boyer Jennifer M<br><sub>(Last) (First) (Middle)</sub><br>C/O INOGEN, INC.<br>500 CUMMINGS CENTER, SUITE 2800<br><sub>(Street)</sub><br>BEVERLY, MA 01915<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2026-02-27 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [ ] 10% Owner<br>[X] Officer (give title below) [ ] Other (specify below)<br>_EVP Entrprs Enblmnt, Ch HR Off_ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Inogen Inc [ INGN ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Common Stock | 2026-03-01 |  | M |  | 4680 | A | $0 | 18189 | D |  |
| Common Stock | 2026-03-01 |  | F |  | 2544<sup>(1)</sup> | D | $6.10 | 15645 | D |  |
| Common Stock | 2026-03-01 |  | A |  | 3603<sup>(2)</sup> | A | $0 | 19248 | D |  |
| Common Stock | 2026-03-01 |  | F |  | 1959<sup>(3)</sup> | D | $6.10 | 17289 | D |  |
| Common Stock | 2026-03-01 |  | M |  | 7332 | A | $0 | 24621 | D |  |
| Common Stock | 2026-03-01 |  | F |  | 3927<sup>(1)</sup> | D | $6.10 | 20694 | D |  |
| Common Stock | 2026-03-01 |  | M |  | 13005 | A | $0 | 33699 | D |  |
| Common Stock | 2026-03-01 |  | F |  | 6952<sup>(1)</sup> | D | $6.10 | 26747 | D |  |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| Restricted Stock Unit | <sup>(4)</sup> | 2026-02-27 |  | A |  | 32500 |  | <sup>(5)</sup> | <sup>(5)</sup> | Common Stock | 32500 | $0 | 32500 | D |  |
| Restricted Stock Unit | <sup>(4)</sup> | 2026-03-01 |  | M |  |  | 4680 | <sup>(6)</sup> | <sup>(6)</sup> | Common Stock | 4680 | $0 | 0 | D |  |
| Restricted Stock Unit | <sup>(4)</sup> | 2026-03-01 |  | M |  |  | 7332 | <sup>(7)</sup> | <sup>(7)</sup> | Common Stock | 7332 | $0 | 7332 | D |  |
| Restricted Stock Unit | <sup>(4)</sup> | 2026-03-01 |  | M |  |  | 13005 | <sup>(8)</sup> | <sup>(8)</sup> | Common Stock | 13005 | $0 | 26010 | D |  |

---

### Footnotes:

(1) The reported shares were withheld to cover the reporting person's tax withholding liability in connection with a portion of a time-based restricted stock unit award that vested on March 1, 2026.

(2) The reported securities represent shares earned and vested on March 1, 2026 based on achievement of the financial performance conditions for the 2025 fiscal year that were approved as part of the 2023 performance-based restricted stock unit award granted on February 28, 2023.

(3) The reported shares were withheld to cover the reporting person's tax withholding liability in connection with the 2023 performance-based restricted stock unit award granted on February 28, 2023 and vested on March 1, 2026.

(4) Each restricted stock unit represents a contingent right to receive one share of Inogen common stock.

(5) Subject to the reporting person's continued service, 1/3rd of the restricted stock units shall vest on March 1, 2027 (the "2027 Vesting Commencement Date"), and 1/3rd of the restricted stock units shall vest every year thereafter on the same day of the year as the 2027 Vesting Commencement Date.

(6) The restriced stock units were fully vested on March 1, 2026.

(7) 1/3rd of the restricted stock units vested on March 1, 2025 (the "2025 Vesting Commencement Date"), and subject to the reporting person's continued service, 1/3rd of the restricted stock units shall vest every year thereafter on the same day of the year as the 2025 Vesting Commencement Date.

(8) 1/3rd of the restricted stock units vested on March 1, 2026 (the "2026 Vesting Commencement Date"), and subject to the reporting person's continued service, 1/3rd of the restricted stock units shall vest every year thereafter on the same day of the year as the 2026 Vesting Commencement Date.

**Signature:** /s/ Mary Wright, as Attorney-in-Fact  
**Date:** 2026-03-03

### Remarks:

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**