---
schema_version: "secwatch.filing_event.v1"
accession: "0000844965-24-000074"
form_type: "8-K"
ticker: "TTI"
cik: "0000844965"
company_name: "TETRA TECHNOLOGIES INC"
filed_at: "2024-09-09T23:59:59+00:00"
generated_at: "2026-05-31T05:59:36.521608+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.4
calibrated_materiality_score: 0.4
confidence: "high"
source: SEC EDGAR
---

# TETRA Technologies CFO Serrano adds Principal Accounting Officer role after O'Brien resigns

## Summary
- Richard D. O'Brien, VP-Finance and Principal Accounting Officer, resigned effective Sept 19, 2024; no dispute with company.
- Elijio V. Serrano, SVP and CFO, will also serve as Principal Accounting Officer starting Sept 19, 2024.
- No new compensation or arrangements were entered into with Serrano for the additional role.
- Serrano has been with TETRA since 2012 as CFO; no family relationships or interested transactions disclosed.

## SEC filing metadata
- accession: 0000844965-24-000074
- form_type: 8-K
- ticker: TTI
- cik: 0000844965
- company_name: TETRA TECHNOLOGIES INC
- filed_at: 2024-09-09T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.4
- calibrated_materiality_score: 0.4
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/844965/000084496524000074/0000844965-24-000074-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/844965/000084496524000074/tti-20240904.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000844965-24-000074
- JSON: https://secwatch.observer/filing/0000844965-24-000074.json
- Plain text: https://secwatch.observer/filing/0000844965-24-000074.txt

## Key facts
- Executive change
  Richard D. O'Brien resigned as Vice President-Finance, Global Controller, Assistant Treasurer, and Principal Accounting Officer at TETRA TECHNOLOGIES INC.
  - Action: resigned
  - Role: Vice President-Finance, Global Controller, Assistant Treasurer, and Principal Accounting Officer
  source text: On September 4, 2024, Richard D. O’Brien, Vice President-Finance, Global Controller, Assistant Treasurer, and Principal Accounting Officer of TETRA Technologies, Inc. (the “Company”), tendered his resignation, effective September 19, 2024, in order to pursue another career opportunity.
  evidence_url: https://www.sec.gov/Archives/edgar/data/844965/000084496524000074/0000844965-24-000074-index.htm
- Executive change
  Elijio V. Serrano was appointed as Senior Vice President, Chief Financial Officer, and Principal Financial Officer (also serving as Principal Accounting Officer) at TETRA TECHNOLOGIES INC.
  - Action: appointed
  - Role: Senior Vice President, Chief Financial Officer, and Principal Financial Officer (also serving as Principal Accounting Officer)
  source text: Commencing September 19, 2024 Elijio V. Serrano, the Company’s Senior Vice President, Chief Financial Officer, and Principal Financial Officer will also serve as the Company’s Principal Accounting Officer in addition to his current responsibilities.
  evidence_url: https://www.sec.gov/Archives/edgar/data/844965/000084496524000074/0000844965-24-000074-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.