secwatch.observer — SEC 8-K summary
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Issuer:     MASTEC INC (MTZ)
CIK:        0000015615
Form:       8-K
Filed at:   2025-08-27T23:59:59+00:00
Accession:  0001193125-25-189769
Event type: other_material
Sentiment:  neutral
Materiality: 0.20
Item codes: 5.04, 9.01
LLM model:  deepseek-v4-flash:cloud

MasTec announces 401(k) plan blackout period from Sept 22 to Oct 19, 2025, due to recordkeeper switch to Schwab
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- Blackout period expected to begin at 4:00 pm ET on Sept 22, 2025 and end during week of Oct 19, 2025.
- Plan participants will be unable to change investments, contributions, loans, or distributions during the blackout.
- Directors and Section 16 officers are prohibited from trading MasTec common stock during the blackout per Sarbanes-Oxley.
- Recordkeeper services transitioning from Bank of America/Merrill Lynch to Schwab Retirement Plan Services effective Oct 1, 2025.
- Blackout notice sent to directors and executive officers on August 26, 2025, via Exhibit 99.1.

Source:
  EDGAR index:    https://www.sec.gov/Archives/edgar/data/15615/000119312525189769/0001193125-25-189769-index.htm
  Primary doc:    https://www.sec.gov/Archives/edgar/data/15615/000119312525189769/d944511d8k.htm
  HTML page:      https://secwatch.observer/filing/0001193125-25-189769

License: Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer