MASTEC INC (MTZ) · Insider Trading (Form 4) SEC Filing

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-05-15 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: MASTEC INC (MTZ) CIK: 0000015615 --- Reporting Owner --- Name: Parker Ava L CIK: 0001526207 Role: Director --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-05-15 | Code: A (Grant or award) Shares: +121 | Price: $0.00 Shares Owned After: 5,406 | Ownership: D (Direct) Footnotes: [F1] These shares of Common Stock represent the portion of the reporting person's quarterly compensation that the reporting person was required to or elected to receive in the form of shares of Common Stock. The number of shares was calculated based on the closing price of a share of Common Stock on May 14, 2026. Pursuant to the Issuer's Deferred Fee Plan for Directors, the reporting person elected to defer the receipt of 60 of such shares to a future date in accordance with the terms of such plan. [Transaction #2] Security: Common Stock Date: 2026-05-15 | Code: F (Payment of exercise/tax) Shares: -14 | Price: $434.77 Total Value: $6,086.78 Shares Owned After: 5,392 | Ownership: D (Direct) Footnotes: [F2] Shares disposed of represent shares withheld by the Issuer to pay taxes due upon vesting of restricted stock. --- Footnotes (Complete Index) --- F1: These shares of Common Stock represent the portion of the reporting person's quarterly compensation that the reporting person was required to or elected to receive in the form of shares of Common Stock. The number of shares was calculated based on the closing price of a share of Common Stock on May 14, 2026. Pursuant to the Issuer's Deferred Fee Plan for Directors, the reporting person elected to defer the receipt of 60 of such shares to a future date in accordance with the terms of such plan. F2: Shares disposed of represent shares withheld by the Issuer to pay taxes due upon vesting of restricted stock. --- Signature --- /s/ \s\ Alberto de Cardenas For: Ava L. Parker (2026-05-19)