# EDGAR Filing Document

**Accession Number:** 0000320121
**File Stem:** 0001140361-26-011728
**Filing Date:** 2026-3
**Character Count:** 2122
**Document Hash:** a34d7fdab72f25aa203a46496fdbc6fc
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001140361-26-011728.hdr.sgml**: 20260327

**ACCESSION NUMBER**: 0001140361-26-011728

**CONFORMED SUBMISSION TYPE**: DEFA14A

**PUBLIC DOCUMENT COUNT**: 3

**FILED AS OF DATE**: 20260327

**DATE AS OF CHANGE**: 20260327

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** TELOS CORP
- **CENTRAL INDEX KEY:** 0000320121
- **STANDARD INDUSTRIAL CLASSIFICATION:** SERVICES-COMPUTER INTEGRATED SYSTEMS DESIGN [7373]
- **ORGANIZATION NAME:** 06 Technology
- **EIN:** 520880974
- **STATE OF INCORPORATION:** MD
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** DEFA14A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-08443
- **FILM NUMBER:** 26807209

**BUSINESS ADDRESS:**
- **STREET 1:** 19886 ASHBURN ROAD
- **CITY:** ASHBURN
- **STATE:** VA
- **ZIP:** 20147
- **BUSINESS PHONE:** 7034716000

**MAIL ADDRESS:**
- **STREET 1:** 19886 ASHBURN ROAD
- **CITY:** ASHBURN
- **STATE:** VA
- **ZIP:** 20147

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** C3 INC
- **DATE OF NAME CHANGE:** 19920703

### UNITED STATES <br>

### SECURITIES AND EXCHANGE COMMISSION <br>

#### Washington, D.C. 20549

### SCHEDULE 14A INFORMATION

#### Proxy Statement Pursuant to Section 14(a) of the Securities <br>

#### Exchange Act of 1934 (Amendment No.)
Filed by the Registrant ☑

Filed by a Party other than the Registrant ☐

Check the appropriate box:

☐<br> Preliminary Proxy Statement

☐ **Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))**

☐ Definitive Proxy Statement

☑ Definitive Additional Materials

☐<br> Soliciting Material under §240.14a-12

## TELOS CORPORATION <br>

#### (Name of Registrant as Specified In Its Charter)
(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

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

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| | |
|:---|:---|
| ☑ | No fee required |
| ☐ | Fee paid previously with preliminary materials |
| ☐ | 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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