Company: ACA
Filing Date: 2025-04-01
Form Type: DEF 14A
Source: 0001739445-25-000058
Chunk: 3

Company: Arcosa, Inc.
Filing Date: 2025-04-01
Form: DEF 14A
Chunk 3
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 See Annex A for a reconciliation of Non-GAAP measures to the most comparable GAAP measures.                                                                                                                                |     |                        |     |                        |     |                          |

#### 3

#### Proxy Summary

#### Focus on Sustainability
We continued to integrate sustainability initiatives into our businesses in our united efforts to build a better world through our strategic planning, sustainability-focused initiatives, and innovative improvement projects. We are proud of achieving the following milestones in our continuous efforts to integrate sustainability into our daily practices and long-term strategies.

### MAJOR SUSTAINABILITY MILESTONES
| Published ourfourth annual Sustainability Reportwith continued disclosure of select social and environmental metrics, including continued progress towards our 5-year emissions goal of a 10% reduction in Scope 1 and Scope 2 GHG emissions intensity by the end of 2026. |     | Invested in the communitieswhere we operate through educational support projects and funding, school supply drives, and food pantry donations.                                                                                 |     | Focused onhigh impact, business-smart emissions reductions projects, including generator-to-line power conversions, energy-efficient equipment replacements, and lighting and fixture upgrades.                    |
| Earned a third consecutivesilver medalfor ouryear-over-year improvementon sustainability efforts from third party sustainability assessor, EcoVadis.                                                                                                                       |     | Launched our secondArcosa Leadership, Exploration, and Development(LEAD) cohort, driven by the success of our first cohort. The goal of the program is to develop high-potential internal talent for broader leadership roles. |     | Conducted a comprehensiveSustainability Materiality Assessmentrefresh by polling internal and external stakeholders to ensure that our sustainability strategy is aligned and focused in the short- and long-term. |

#### Focus on Safety
We are committed to safety across our operations. We continued to enhance our safety culture through our company-wide safety culture initiative, ARC 100. We additionally launched "Arcosa ALIVE," a new safety initiative to prioritize efforts to reduce serious injury and fatality exposure. Our continued efforts have driven safety improvements, positively impacting our employees on a day-to-day basis.

| â |     | TRIR |     | We have seen a26% year-over-year declinein total recordable 
 incident rate("TRIR"), and a21% year-over-year decline      
 in days away, restricted, or transferred rate("DART").      |
| â |     | DART |     |                                                             |

#### 4

#### Proxy Summary

#### Shareholder Engagement
We maintain