Confidence is the Folly of Fools Consider Tax Consequences of Bonds While Investing

Confidentiality of Off-Shore Banks

Many offshore jurisdictions offer the complimentary benefit of secrecy legislation. These countries have enacted laws establishing strict corporate and banking confidentiality. If this confidentiality is breached, there are serious consequences for the offending party. An example of a breach of banking confidentiality is divulging customer identities; disclosing shareholders is a breach of corporate confidentiality in some jurisdictions. However, this secrecy doesn't mean that offshore investors are criminals with something to hide. It's also important to note that offshore laws will allow identity disclosure in clear instances of drug trafficking, money laundering or other illegal activities. From the point of view of a high-profile investor, however, keeping information, such as the investor's identity, secret while accumulating shares of a public company can offer that investor a significant financial (and legal) advantage. High-profile investors don't like the public at large knowing what stocks they're investing in. Multi-millionaire investors don't want a bunch of little fish buying the same stocks that they have targeted for large volume share purchases - the little guys run up the prices.
Source: http://www.investopedia.com/articles/basics/03/050803.asp