Sector Rankings

Most Sustainable Defence Companies 2026

2 Defence companies ranked 0–100 on real environmental impact using SINK's open, physics-first formula.

2
Companies ranked
34
Sector average
40
Sector best (BAE Systems)
Frequently asked

Defence sustainability, answered.

Which Defence company is the most sustainable?

BAE Systems is the highest-scoring Defence company on SINK with a score of 40/100 (Below expectations).

What is the average sustainability score for Defence companies?

The average SINK score across 2 Defence companies is 34/100. The global average across all scored companies is 38/100.

How does SINK rate Defence companies?

SINK scores Defence companies on 10 questions using public data: Scope 1/2/3 carbon footprint, energy source, nature and biodiversity, resource use, water impact, emissions trajectory, science-based targets, transparency, and major controversies. The formula adjusts for the industry's inherent environmental footprint and company scale.

Which Defence company has the worst sustainability score?

Lockheed Martin has the lowest SINK score among Defence companies at 27/100 (Significant gaps).

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