# HALLIBURTON CO — DEFA14A

HALLIBURTON CO of HOUSTON, TX filed a DEFA14A with the SEC on 2026-03-31. Industry: Oil & Gas Field Services, NEC.

## Filing

- Filed: 2026-03-31
- Form: DEFA14A
- Accession: 0000045012-26-000034
- Registrant: HALLIBURTON CO
- CIK: 0000045012
- Industry (SIC): Oil & Gas Field Services, NEC (1389)
- State of incorporation: DE
- Location: HOUSTON, TX

## Documents (4)

| Seq | Type | Description |
| --- | --- | --- |
| 1 | DEFA14A | DEFA14A |
| 2 | GRAPHIC | halliburtoncompanydefa14001.jpg |
| 3 | GRAPHIC | halliburtoncompanydefa14002.jpg |
| 4 | GRAPHIC | halliburtoncompanydefa14003.jpg |

## Filing timeline for this registrant (60)

_Showing 12 of 60 filings._

| Filed | Form |
| --- | --- |
| 2026-03-31 | DEFA14A |
| [2026-03-31](https://search.stillhousedata.com/proxy/0000045012-26-000033) | DEF 14A |
| [2026-03-11](https://search.stillhousedata.com/proxy/0000045012-26-000023) | PRE 14A |
| [2025-04-01](https://search.stillhousedata.com/proxy/0000045012-25-000026) | DEFA14A |
| [2025-04-01](https://search.stillhousedata.com/proxy/0000045012-25-000025) | DEF 14A |
| [2024-05-03](https://search.stillhousedata.com/proxy/0000045012-24-000026) | DEFA14A |
| [2024-04-30](https://search.stillhousedata.com/proxy/0000045012-24-000019) | DEFA14A |
| [2024-04-02](https://search.stillhousedata.com/proxy/0001308179-24-000415) | DEFA14A |
| [2024-04-02](https://search.stillhousedata.com/proxy/0001308179-24-000414) | DEF 14A |
| [2023-04-04](https://search.stillhousedata.com/proxy/0001308179-23-000505) | DEFA14A |
| [2023-04-04](https://search.stillhousedata.com/proxy/0001308179-23-000504) | DEF 14A |
| [2023-03-10](https://search.stillhousedata.com/proxy/0001308179-23-000125) | PRE 14A |

## More

- [CIK 45012 on SEC EDGAR (source of record)](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=45012&type=&dateb=&owner=include&count=40)
- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/proxy/0000045012-26-000034.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.