As of mid September 2016, 203 companies were active under the EU-US Privacy Shield, according to the US Department of Commerce official website. The list does not include large multinationals apart from Microsoft and Salesforce.
The Privacy Shield Framework became effective on August 1, 2016, replacing the Safe Harbor which was declared invalid on October 2015. After 1 year, the Safe Harbour had about 129 US based organizations that self-certified their adherence to the Safe Harbor Principles. They had become around 5,500 participants by 2016.
The US Department of Commerce, International Trade Administration (ITA), maintains the Privacy Shield official website where companies may find helpful information on the new framework.
More information on Safe Harbor is available here
More information on Privacy Shield is available here
For more information, Francesca Giannoni-Crystal