AM Castle Emerges from Chapter 11

OAK BROOK, IL, August 31, 2017 – A.M. Castle & Co. (OTC Pink: CASLQ) (the “Company” or
“Castle”), a global distributor of specialty metal and supply chain solutions, today announced that it has
emerged from its voluntary chapter 11 proceedings before the United States Bankruptcy Court for the
District of Delaware commenced on June 18, 2017. Having successfully restructured its balance sheet and
substantially reduced its debt burden and interest costs under its Amended Prepackaged Joint Chapter 11
Plan of Reorganization, the Company is now poised for growth.

President and CEO Steve Scheinkman commented, “Today, A.M. Castle celebrates a proud step forward
that marks a new beginning for our Company. We have successfully and expeditiously completed our
financial restructuring, positioning Castle for growth and enabling us to serve our customers and partner
with our suppliers more efficiently than we have in the past few financially-challenged years. As anticipated,
we have significantly reduced our debt burden and interest expense and now possess a balance sheet
competitive to others in the metals service center industry, enabling us to focus on compelling growth
opportunities across our business by creating even more value for our customers and supplier partners.
Equally important, we will also plan to make investments back into Castle to ensure we remain a Company
that attracts and builds a robust talent base and fulfilling careers for our employees.”

Scheinkman continued, “This milestone is a testament to the hard work of our employees and our
leadership team, as well as the confidence of other stakeholders, all of whom reaffirmed their overwhelming
belief in Castle’s value proposition throughout the process. Many companies have crumbled under similar
circumstances, but Castle has grown. Rumors of our demise were greatly exaggerated, and now, with one
of the most competitive balance sheets in the industry, we look forward to regaining our leadership position.
Moving forward, we will build on this success by focusing on developing our business, driving innovation
for our customers, empowering our branches, and renewing our commitment to our employees and our

Executive Vice President and Chief Financial Officer Patrick Anderson commented, “As previously
announced, our financial restructuring has markedly reduced our debt and interest expense. Following the
effective date of our Plan, our initial annual cash interest expense will be approximately $4 million. Further,
even including interest on the new convertible debt held primarily by our shareholders, which will initially be
paid “in-kind,” our total yearly interest expense has decreased by nearly 70%, from approximately $36
million per year prior to the restructuring. With this new, improved balance sheet, we will be able to invest
further in both organic and strategically acquired revenue growth, capital investments, and innovation for
our customers.”

Scheinkman concluded, “This journey has been a long one for our employees, our leadership, and all of
our stakeholders. We sincerely thank everyone involved for their belief and support through this process.
We are excited about what the future holds for Castle and all of our stakeholders with this restructuring now

About A.M. Castle & Co.
Founded in 1890, A.M. Castle & Co. is a global distributor of specialty metal and supply chain services,
principally serving the producer durable equipment, commercial aircraft, heavy equipment, industrial goods,
construction equipment, and retail sectors of the global economy. Its customer base includes many Fortune
500 companies as well as thousands of medium and smaller-sized firms spread across a variety of
industries. It specializes in the distribution of alloy and stainless steels; nickel alloys; aluminum and
carbon. Together, Castle and its affiliated companies operate out of 21 metals service centers located
throughout North America, Europe and Asia. Its common stock is traded on the OTC Pink Current
Information® under the ticker symbol “CASLQ”.

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