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December 16, 2025
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Michael Best represented Mauser Packaging Solutions (“Mauser”), a leading global supplier of rigid packaging products and services, in its acquisition of Siena Plastics LLC, a manufacturer of small high-performance containers. The acquisition strengthens Mauser’s portfolio, opening new opportunities to deliver high-quality packaging solutions to their clients.
The Michael Best team was led by Brett Valentyn in conjunction with Kerryann Minton, and with assistance from Jack Darrow. Additional support was provided by Mark Lotito, Brad Macdonald, Sean Smestad, and Kelly Teelin.
Learn more about Michael Best’s M&A team and how we can help you reach your business goals.
Related People

Brett R. Valentyn
Partner
brvalentyn@michaelbest.com
T 608.283.2251

Kerryann Haase Minton
Managing Partner, Chicago Office
Management Committee Member
khminton@michaelbest.com
T 312.836.5075

Mark A. Lotito, Ph.D.
Partner
malotito@michaelbest.com
T 414.223.2507

Bradley A. MacDonald
Associate
brad.macdonald@michaelbest.com
T 312.596.5863

Sean A. Smestad
Partner
sasmestad@michaelbest.com
T 312.596.5888
*Not admitted in Illinois

Kelly A. Teelin
Corporate Services Professional
kateelin@michaelbest.com
T 608.283.0132

