# EDGAR Filing Document

**Accession Number:** 0001784254
**File Stem:** 0001140361-26-026567
**Filing Date:** 2026-6
**Character Count:** 2111
**Document Hash:** 9dab7ba7667122a622e2c94f5c0332f2
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001140361-26-026567.hdr.sgml**: 20260626

**ACCESSION NUMBER**: 0001140361-26-026567

**CONFORMED SUBMISSION TYPE**: DEFA14A

**PUBLIC DOCUMENT COUNT**: 5

**FILED AS OF DATE**: 20260626

**DATE AS OF CHANGE**: 20260626

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Mediaco Holding Inc.
- **CENTRAL INDEX KEY:** 0001784254
- **STANDARD INDUSTRIAL CLASSIFICATION:** RADIO BROADCASTING STATIONS [4832]
- **ORGANIZATION NAME:** 06 Technology
- **EIN:** 842427771
- **STATE OF INCORPORATION:** IN
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** DEFA14A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-39029
- **FILM NUMBER:** 261129634

**BUSINESS ADDRESS:**
- **STREET 1:** 48 WEST 25TH STREET, THIRD FLOOR
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10010
- **BUSINESS PHONE:** 212-229-9797

**MAIL ADDRESS:**
- **STREET 1:** 48 WEST 25TH STREET, THIRD FLOOR
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10010

#### 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 ☐

#### 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

#### <br>

## MediaCo Holding Inc.

#### (Name of Registrant as Specified in Its Charter)

#### <br>

#### (Name of Person(s) Filing Proxy Statement, if other than the Registrant)

#### <br>

#### Payment of Filing Fee (Check all boxes that apply):
☒ 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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