2019 Saxo acquires a majority stake in Aina PTT Oy.
2018 Mekalasi acquires 90 %  of Mediteam Oy:s shares.
2018 Plastone acquires Enstos factory in Tallinn.
2018 Mekalasi acquires all shares in Risto Vesalainen Oy.
2017 Mekalasi acquires the business activities of Pragmatic Oy and Slangar Nordic Oy.
2014 Fredrik Björnberg and his family acquires all shares of Saxo.
2013 Saxo sells its stake in the hydropower plant Pato OY, the company owns powerplants in Kymi river at Myllykoski and Vuolenkoski.
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2011 Saxo, along with other shareholders, sells its stake in Myllykoski Oyj and Rhein Papier GmbH to UPM Oyj. Myllykoski Oyj is an international paper company employing 2400 people with Euro Billion 1,1 in revenue.
2005 The subsidiary Plastone Oy expands its business to Estonia and opens a new factory in Saue, south of Tallinn.
1996 Myllykoskis hydropower plant Pato is sold to the shareholders who invest in the expansion and modernisation of the plant.
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1988 Ruskealan Marmori Oy and the lime production is sold to Partek. The agricultural lime producers Loukolampi and Kalkkimaa are transferred to Saxo Oy.
1982 Saxo Oy is founded. Heinon Kiviliike Oy and Lapin Marmori Oy are acquired.
Saxo also acquires Kellankosken voima Oy. Mekalasi Oy and Plastone Oy are part of the acquisition.
1978 Carl Gustav Björnberg retires from Myllykoski and his children Fredrik, Carl, Hans and Marina continue the business.
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1968 Mining starts at the Luikonlahti coppermine and continues until closure in 1983.
1952 Yhtyneet Paperitehtaat is split and Myllykoski once again becomes a privately held family company with C.G. Björnberg as CEO.