# EDGAR Filing Document

**Accession Number:** 0000056701
**File Stem:** 0000056701-25-000048
**Filing Date:** 2025-8
**Character Count:** 5073
**Document Hash:** 20b0526553543ec0a5d8d9b4c1dd18bf
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000056701-25-000048.hdr.sgml**: 20250829

**ACCESSION NUMBER**: 0000056701-25-000048

**CONFORMED SUBMISSION TYPE**: DEFA14A

**PUBLIC DOCUMENT COUNT**: 3

**FILED AS OF DATE**: 20250829

**DATE AS OF CHANGE**: 20250828

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** KOSS CORP
- **CENTRAL INDEX KEY:** 0000056701
- **STANDARD INDUSTRIAL CLASSIFICATION:** HOUSEHOLD AUDIO & VIDEO EQUIPMENT [3651]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 391168275
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 0630

**FILING VALUES:**
- **FORM TYPE:** DEFA14A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-03295
- **FILM NUMBER:** 251275114

**BUSINESS ADDRESS:**
- **STREET 1:** 4129 N PORT WASHINGTON AVE
- **CITY:** MILWAUKEE
- **STATE:** WI
- **ZIP:** 53212
- **BUSINESS PHONE:** 4149645000

**MAIL ADDRESS:**
- **STREET 1:** 4129 N PORT WASHINGTON AVE
- **CITY:** MILWAUKEE
- **STATE:** WI
- **ZIP:** 53212

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** KOSS ELECTRONICS INC
- **DATE OF NAME CHANGE:** 19721005

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** REK O KUT CO INC
- **DATE OF NAME CHANGE:** 19680124

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| | |
|:---|:---|
| **UNITED STATES** | **UNITED STATES** |
| **SECURITIES AND EXCHANGE COMMISSION** | **SECURITIES AND EXCHANGE COMMISSION** |
| **Washington, D.C. 20549** | **Washington, D.C. 20549** |
| **SCHEDULE 14A** | **SCHEDULE 14A** |
| Proxy Statement Pursuant to Section 14(a) of<br>the Securities Exchange Act of 1934 <br>(Amendment No.) | Proxy Statement Pursuant to Section 14(a) of<br>the Securities Exchange Act of 1934 <br>(Amendment No.) |
| Filed by the Registrant ☒ | Filed by the Registrant ☒ |
| Filed by a Party other than the Registrant ☐ | Filed by a Party other than the Registrant ☐ |
| 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 Pursuant to §240.14a-12 |
| Koss Corporation | Koss Corporation |
| (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): | Payment of Filing Fee (Check the appropriate box): |
| ☒ | No fee required. |
| ☐ | Fee paid previously with preliminary materials. |
| ☐ | Fee Computed on table in exhibit required by Item 25(b) per Exchange Act Rule 14a-66(i)(1) and 0-11 |

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![Picture 3](koss-20250828xdefa14ag001.jpg)

Your Vote Counts! KOSS CORPORATION 2023 Annual Meeting Vote by October 17, 2023 11:59 PM ET V22144-P97924 You invested in KOSS CORPORATION and it's time to vote! You have the right to vote on proposals being presented at the Annual Meeting. This is an important notice regarding the availability of proxy material for the shareholder meeting to be held on October 18, 2023. Get informed before you vote View the Notice and Proxy Statement, Form 10-K and Shareholder Letter online OR you can receive a free paper or email copy of the material(s) by requesting prior to October 4, 2023. If you would like to request a copy of the material(s) for this and/or future shareholder 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. For complete information and to vote, visit www.ProxyVote.com Control # Smartphone users Point your camera here and vote without entering a control number Vote Virtually at the Meeting\* October 18, 2023 8:00 a.m. CST Virtually at: www.virtualshareholdermeeting.com/KOSS2023 \*Please check the meeting materials for any special requirements for meeting attendance.

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![Picture 4](koss-20250828xdefa14ag002.jpg)

Vote at www.ProxyVote.com THIS IS NOT A VOTABLE BALLOT This is an overview of the proposals being presented at the upcoming shareholder meeting. Please follow the instructions on the reverse side to vote these important matters. KOSS CORPORATION 2023 Annual Meeting Vote by October 17, 2023 11:59 PM ET Board Voting Items Recommends 1. ELECTION OF DIRECTORS Nominees: 01) Thomas L. Doerr 04) Lenore E. Lillie 02) Michael J. Koss OS) William J. Sweasy 03) Steven A. Leveen O For 2. TO APPROVE, ON A NON-BINDING ADVISORY BASIS, COMPENSATION PAID TO OUR NAMED EXECUTIVE OFFICERS. O For 3. PROPOSAL TO RATIFY THE APPOINTMENT OF WIPFLI LLP AS INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM OF THE COMPANY FOR THE FISCAL YEAR ENDING JUNE 30, 2024. Q For 4. TO APPROVE THE KOSS CORPORATION 2023 EQUITY INCENTIVE PLAN. O For NOTE: Such other business as may properly come before the meeting or any adjournment thereof. V22145-P97924

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