Paris, May 2nd 2017. Trescal, the international specialist in calibration services, announces the
acquisition of Acucal Inc., a leading calibration services provider present in Virginia, North Carolina,
Arizona and Hawaii, USA.

This transaction consolidates Trescal’s geographical footprint and technical coverage in the United States and
has been completed with the support of Ardian, its majority shareholder.

Founded in 1987 and headquartered in Manassas (Virginia), Acucal is A2LA-accredited and has strong
technical skills in Electrical DC/Low Frequency and RF/ microwave. Besides its four standing laboratories, the
company also operates through a fleet of six state-of-the-art accredited mobile laboratories across all the
country. With a turnover of around $5,3 million, the company employs 40 people and is mostly active in the
Electronics, Aeronautics and Defense sectors.

Acucal’s founder and managing director, Thomas Efaw, will remain in his current position and will report to
Kathy Boyd, Trescal Inc. President.

With this acquisition, Trescal’s network will comprise 20 laboratories in the US, with 450 employees. It is the
22nd acquisition since Ardian takeover in July 2013.

Guillaume Caroit, Trescal Deputy CEO, said: “We are thrilled with Acucal joining us. Their geographical
presence is a perfect fit, particularly in Arizona and Virginia. Acucal’s broad experience in operating mobile
laboratories will provide flexibility and additional reach for the upcoming national tenders.”

Thibault Basquin, Managing Director Ardian Mid Cap Buyout, added: “This new acquisition demonstrates the
commitment of Trescal’s management and Ardian to actively pursue the strategy of targeted acquisitions in
North America. The market there is still very fragmented with strong possibilities for growth. This is another
example of how Ardian supports its portfolio companies in their ambitious international development plans.”