# EDGAR Filing Document

**Accession Number:** 0001649989
**File Stem:** 0001140361-26-023585
**Filing Date:** 2026-6
**Character Count:** 5955
**Document Hash:** a88016eeaffa6a2f8cc3bd94eadfab65
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001140361-26-023585.hdr.sgml**: 20260601

**ACCESSION NUMBER**: 0001140361-26-023585

**CONFORMED SUBMISSION TYPE**: DEFA14A

**PUBLIC DOCUMENT COUNT**: 3

**FILED AS OF DATE**: 20260601

**DATE AS OF CHANGE**: 20260601

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Outlook Therapeutics, Inc.
- **CENTRAL INDEX KEY:** 0001649989
- **STANDARD INDUSTRIAL CLASSIFICATION:** BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 383982704
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 0930

**FILING VALUES:**
- **FORM TYPE:** DEFA14A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-37759
- **FILM NUMBER:** 261052109

**BUSINESS ADDRESS:**
- **STREET 1:** 111 S. WOOD AVENUE
- **STREET 2:** UNIT #100
- **CITY:** ISELIN
- **STATE:** NJ
- **ZIP:** 08830
- **BUSINESS PHONE:** 6096193990

**MAIL ADDRESS:**
- **STREET 1:** 111 S. WOOD AVENUE
- **STREET 2:** UNIT #100
- **CITY:** ISELIN
- **STATE:** NJ
- **ZIP:** 08830

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Oncobiologics, Inc.
- **DATE OF NAME CHANGE:** 20150804

### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549

#### <br>

### SCHEDULE 14A
Proxy Statement Pursuant to Section 14(a) of

the Securities Exchange Act of 1934 (Amendment No.)

Filed by the Registrant ☒

Filed by a Party other than the Registrant ☐

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| | |
|:---|:---|
| Check the appropriate box: | Check the appropriate box: |
| ☐ | Preliminary Proxy Statement |
| ☐ | **Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))** |
| ☐ | Definitive Proxy Statement |
| ☒ | Definitive Additional Materials |
| ☐ | Soliciting Material under §240.14a-12 |
| **Outlook Therapeutics, Inc.** | **Outlook Therapeutics, Inc.** |
| (Name of Registrant as Specified in Its Charter) | (Name of Registrant as Specified in Its Charter) |
| (Name of Person(s) Filing Proxy Statement, if other than the Registrant) | (Name of Person(s) Filing Proxy Statement, if other than the Registrant) |

---

Payment of Filing Fee (Check the appropriate box):

☒ No fee required. <br> ☐ Fee paid previously with preliminary materials. <br> ☐ Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a–6(i)(1) and 0–11.

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Your Vote Counts! OUTLOOK THERAPEUTICS, INC. 111 S. WOOD AVE UNIT #100 ISELIN, NJ 08830 OUTLOOK THERAPEUTICS, INC. 2026 Special Meeting Vote by July 15, 2026 11:59 PM Eastern Time \*Please check the meeting materials for any special requirements for meeting attendance. At the meeting, you will need to request a ballot to vote these shares. Smartphone users Point your camera here and vote without entering a control number For complete information and to vote, visit www.ProxyVote.com Control # T00828-S38550 You invested in OUTLOOK THERAPEUTICS, INC. and it's time to vote! You have the right to vote on proposals being presented at the Special Meeting. This is an important notice regarding the availability of proxy materials for the stockholder meeting to be held on July 16, 2026. Get informed before you vote View the Notice and Proxy Statement online OR you can receive a free paper or email copy of the material(s) by requesting prior to July 2, 2026. If you would like to request a copy of the material(s) for this and/or future stockholder meetings, you may (1) visit www.ProxyVote.com, (2) call 1-800-579-1639 or (3) send an email to sendmaterial@proxyvote.com. If sending an email, please include your control number (indicated below) in the subject line. Unless requested, you will not otherwise receive a paper or email copy. Vote in Person at the Meeting\* July 16, 2026 9:00 AM, Central Time Cooley LLP 110 N Wacker Dr Suite 4200 Chicago, IL 60606

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Vote at www.ProxyVote.com THIS IS NOT A VOTABLE BALLOT This is an overview of the proposals being presented at the upcoming stockholder meeting. Please follow the instructions on the reverse side to vote these important matters. Prefer to receive an email instead? While voting on www.ProxyVote.com, be sure to click "Delivery Settings". T00829-S38550 1a. Approval of the potential issuance of shares of our common stock underlying (i) common warrants (the "Private Placement Warrants") to purchase up to 16,129,033 shares of common stock issued in April 2026 and (ii) placement agent warrants (the "Placement Agent Warrants") to purchase up to an aggregate of 2,258,064 shares of common stock, consisting of Placement Agent Warrants to purchase up to 1,129,032 shares of common stock issued in April 2026 and Placement Agent Warrants to purchase up to 1,129,032 shares of common stock that are issuable upon exercise of the Private Placement Warrants, in each case in connection with a registered direct offering of shares of our common stock and a concurrent private placement of accompanying warrants. For 1b. Approval of the potential issuance of shares of our common stock underlying previously issued common warrants to purchase up to 2,142,854 shares of common stock. For 2. Approval of the amendment of our Restated Certificate of Incorporation, as amended, to increase the total number of shares of our common stock authorized for issuance from 260,000,000 shares to 600,000,000 shares. For 3. Approval of the amendment of our Restated Certificate of Incorporation, as amended to effect a reverse stock split of our issued and outstanding common stock, and a corresponding and proportionate reduction in the number of authorized shares of common stock, at a ratio of 1-for-10 to 1-for-50, to be determined in the sole discretion of the Board of Directors. For NOTE: In his discretion, the named proxy is authorized to vote on such other business that may properly come before the meeting or any adjournment or postponement thereof. Voting Items Board Recommends

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