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Last updated: May 2026
Ziggma surfaces real-world impact data — not ESG risk ratings. This page explains where the data comes from, how it's calculated, what it covers, and where its limits are. Everything you see in Ziggma's impact features is powered by ACA Ethos, one of the most rigorous impact data engines globally.
The Ziggma Impact Score (0–100) reflects how positively a company or fund contributes to real-world environmental and social outcomes. A higher score means greater positive impact on the planet and society.
The score is not an ESG risk rating. ESG ratings measure how environmental, social, and governance factors affect a company's financial performance. The Impact Score measures the reverse: how a company affects the world around it.
ACA Ethos calculates scores across ten impact themes relevant to private investors:
Ethos scans global media multiple times daily across major markets including the US, UK, Europe, Japan, India, Australia, and Brazil. Each controversy is reviewed by analysts who assign a severity score (1–10) and one or more of 25 category tags — covering human rights, environmental damage, labor practices, product safety, and more. Validated controversies are incorporated into the Impact Score as downward adjustments.
Where companies do not disclose certain data, Ethos models values using peer-group averages adjusted for revenue or workforce size. All modeled datapoints are clearly flagged in Ziggma, and users can choose to exclude them from their ratings.
Coverage varies by market and company size. Larger companies with robust disclosure practices have higher data density than smaller companies or those in markets with weaker reporting standards.
v1.0 — May 2026. Initial canonical page. Content migrated and expanded from blog post published February 2026.
ACA Ethos sources data from five categories of inputs, each subject to multi-layer quality control before integration:
| Source type | Examples | Refresh |
|---|---|---|
| Corporate disclosures | Sustainability reports, annual filings, CDP submissions | Annual + on update |
| Government & regulatory | EPA, EU regulatory databases, national statistics agencies | Monthly |
| NGOs & academic bodies | Human rights organizations, academic research institutions | Monthly |
| Licensed third-party providers | Specialist data vendors for specific metric categories | Monthly |
| Media monitoring | Automated scraping + manual analyst review across 7+ markets | Multiple times daily |
All data passes through multi-layer quality control checks and validation in a staging environment before release. Ethos performs randomized datapoint audits that must achieve 100% accuracy before data enters the live environment. Most metrics are refreshed monthly.
These two approaches answer fundamentally different questions. Understanding the distinction matters for how you interpret Ziggma's scores.
