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M-D Building Products Names New Chief Operating Officer

Posted on June 21, 2016

OKLAHOMA CITY – Ryan Plotkin has been appointed Chief Operating Officer for M-D Building Products,Inc., a privately held company involved in developing, manufacturing and marketing a range of residential and commercial weatherproofing, flooring and installation products. The announcement was made by Loren Plotkin, the company’s President and Chief Executive Officer.

“The company has grown considerably in the past three years,” said Loren Plotkin. “We are fortunate to
have a considerable depth of talent across M-D’s executive management team. As we consider managing our growth in the coming years, we are recognizing not only the contributions of our management team but also identifying opportunities operationally where we can gain efficiencies through stronger processes
and practices.”

Loren Plotkin continued, “Ryan’s previous experience as Senior Vice President of Operations for the
company gives him valuable strategic and operational insights into the company as he moves forward in his expanded role. Additionally, Ryan’s skills and qualities will complement our operational team as they
work together to advance our company’s growth agenda.”

Ryan Plotkin graduated from the University of Miami in 2007 and joined M-D Building Products in 2008 as
Global Business Manager. He was subsequently promoted to Vice President of Corporate Development and later Senior Vice President of Operations. He recently rejoined the company after obtaining his MBA from the Olin School of Business at Washington University in St. Louis. As COO, Ryan Plotkin will be responsible for the consumer products division of the company in North
America.

“As board members, we unanimously support this decision to add a COO position to the senior
management team,” commented board member Nick Canter. “We have a strong talent base at M-D Building Products, which bodes well for the future of the company. Ryan represents the dynamic and energetic leadership talent we have in place to deliver new innovations not only in our products but also
in our processes. We are very pleased with this announcement.”

“I am humbled and honored for the opportunity to work with many creative, dedicated and talented
professionals at M-D Building Products,” said Ryan Plotkin. “Our company has a track record in both product and manufacturing innovations. I am excited about our future and the opportunities ahead to
grow our company and extend our leadership for many years to come.”

About M-D Building Products

M-D Building Products designs, manufactures and markets a range of residential and commercial
weatherproofing products, including door and window weather-stripping, garage door weather-stripping, pipe insulation and a complete line of interior and exterior caulk marketed under both the Tower Sealants and DuPont ™ brands. The company also produces aluminum and wood flooring transitions as well as installation
tools.

The company is headquartered in Oklahoma City, where its primary manufacturing and distribution facilities
are located. M-D Building Products also operates seven additional manufacturing and distribution sites across the U.S. and Canada. The company sells its products through numerous retailers and professional channels to
consumers, contractors, wholesalers and community agencies across the nation.

In 2007, the current management team bought out the founding Macklanburg family after three generations.
Led by majority shareholder Loren Plotkin, the management team has continued to grow and expand the
company’s product lines and upgraded manufacturing and distribution capabilities and facilities.