SI Group Appoints Rich Preziotti to Lead Additives Business

Appointment Solidifies Strong Additives Positioning,Enhanced by Backward Integration

SCHENECTADY,New York,Jan. 24,2019 --SI Group,a leading global developer and manufacturer of performance additives,process solutions,pharmaceuticals and chemical intermediates,announced today the appointment of Rich Preziotti as Senior Vice President & President,Additives. This appointment follows the October 15,2018 completion of the acquisition of SI Group by SK Capital Partners,a private investment firm focused on the specialty materials,chemicals and pharmaceuticals sectors. The transaction included the combination of SI Group with Addivant,an SK Capital portfolio company since 2013 and leading global producer of specialty additives.

Preziotti brings nearly 30 years of experience to SI Group,having recently served as President & CEO of Vertellus,a global specialty chemical company. Prior to that,he worked at Honeywell,where he held various leadership roles. Preziotti graduated from Union College with a Bachelor of Science degree in electrical engineering. He also holds an MBA from Columbia Business School. "Rich has a proven track record of impressive accomplishments leading global businesses,M&A projects and strategic growth initiatives," said Frank Bozich,SI Group CEO. "With the addition of Rich to our executive leadership team,we are positioned to realize our potential as a global specialty additives powerhouse."

Contemporaneous with these changes,John Steitz,former SI Group CEO,Additives,announced his intention to transition out of the company. Steitz was instrumental in the integration of SI Group and Addivant during the SK Capital acquisition process in 2018. "John's commitment during the integration process has been invaluable to our organization,SI Group CEO. "His contributions to our organization have been impactful and enduring and we wish him much success on his future endeavors."

Additional leadership changes include:

Paul Tilley to become Senior Vice President & President,Chemical Intermediates & Industrial Resins

Philip Ingham to become Vice President,Corporate Development

Suresh Kalra to become Vice President,Industrial Resins & Specialties

SI Group leadership biographies may be found athttp://www.siigroup.com/leadership.asp.

ABOUT SI GROUP

SI Group is a leading global developer and manufacturer of performance additives,with strong market positions in the plastics,oilfield,rubber,fuels & lubricants,active pharmaceutical ingredients and industrial resins industries. SI Group solutions are critical to the quality and performance of countless industrial and consumer goods. Headquartered in Schenectady,SI Group operates more than 30 manufacturing facilities on five continents with approximately $2 billion in annual sales,and more than 3,000 employees worldwide. SI Group is a portfolio company of SK Capital Partners. In 2018,SI Group received its third silver award for corporate social responsibility by EcoVadis,and is ranked among the top seven percent of more than 45,000 worldwide companies. SI Group is The Substance Inside. For more information,please visit www.siigroup.com.

Media Contact:

Tara Morgan

SI Group,Inc.

+ 1 518-347-4194

tara.morgan@siigroup.com

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