# CSG SYSTEMS INTERNATIONAL INC — DEFA14A

CSG SYSTEMS INTERNATIONAL INC of ENGLEWOOD, CO filed a DEFA14A with the SEC on 2025-12-17. Industry: Services-Computer Processing & Data Preparation.

## Filing

- Filed: 2025-12-17
- Form: DEFA14A
- Accession: 0001193125-25-321237
- Registrant: CSG SYSTEMS INTERNATIONAL INC
- CIK: 0001005757
- Industry (SIC): Services-Computer Processing & Data Preparation (7374)
- State of incorporation: DE
- Location: ENGLEWOOD, CO

## Documents (1)

| Seq | Type | Description |
| --- | --- | --- |
| 1 | DEFA14A | DEFA14A |

## Filing timeline for this registrant (60)

_Showing 12 of 60 filings._

| Filed | Form |
| --- | --- |
| [2026-01-08](https://search.stillhousedata.com/proxy/0001193125-26-006816) | DEFA14A |
| 2025-12-17 | DEFA14A |
| [2025-12-16](https://search.stillhousedata.com/proxy/0001140361-25-045563) | DEFM14A |
| [2025-12-02](https://search.stillhousedata.com/proxy/0001140361-25-044040) | PREM14A |
| [2025-11-06](https://search.stillhousedata.com/proxy/0001193125-25-270018) | DEFA14A |
| [2025-10-30](https://search.stillhousedata.com/proxy/0001193125-25-257291) | DEFA14A |
| [2025-10-30](https://search.stillhousedata.com/proxy/0001193125-25-257111) | DEFA14A |
| [2025-10-30](https://search.stillhousedata.com/proxy/0001193125-25-257078) | DEFA14A |
| [2025-10-30](https://search.stillhousedata.com/proxy/0001193125-25-257043) | DEFA14A |
| [2025-10-30](https://search.stillhousedata.com/proxy/0001193125-25-257040) | DEFA14A |
| [2025-10-30](https://search.stillhousedata.com/proxy/0001193125-25-257034) | DEFA14A |
| [2025-10-30](https://search.stillhousedata.com/proxy/0001193125-25-257031) | DEFA14A |

## More

- [CIK 1005757 on SEC EDGAR (source of record)](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1005757&type=&dateb=&owner=include&count=40)
- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/proxy/0001193125-25-321237.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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