The Overall Ranking is a score from 1 star (very bad) to 5 stars (excellent) generated based on the Company Reviews of current and former employees at this company, taking everything into account.
The number you see in the middle of the donut pie chart is the simple average of these scores. If you hover over the various sections of the donut, you will see the % breakdown of each score given.
The percentile score in the title is calculated across the entire Company Database and uses an adjusted score based on Bayesian Estimates (to account for companies that have few reviews). Simply put, as a company gets more reviews, the confidence of a "true score" increases so it is pulled closer to its simple average and away from the average of the entire dataset.
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Ardian, formerly AXA Private Equity, is an independent private equity investment company. It has assets of US $50 billion managed or advised in Europe, North America and Asia.
The company operates on four business segments: Funds of Funds, Direct Funds, Infrastructure and Private Debt. Ardian raises money from about 346 investors from various domains (institutional investors, Funds of Funds, government agencies, sovereign funds, family offices, pension funds and insurance companies).
WSO Company Database Comparison Table