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Milan, Italy / Duchcov, Czech Republic – 01 October 2025
SEDIVER acquires Seves Glass Block
Sediver S.p.A. (“SEDIVER”), a Blackstone portfolio company, has acquired 100% of the ownership interest in Seves Glass Block s.r.o (“SGB”) from Progresus Group and Casper Group, in a strategic move to expand its production capacity. The transaction closed on 30 September 2025 and financial terms were not disclosed. Based in the Czech Republic, SGB is a market leader in manufacturing high-quality glass blocks for interior design and architectural applications.
A strategic move to support market growth
The acquisition comes amid accelerating global demand for high-quality toughened glass insulators for overhead transmission lines. SEDIVER will invest significantly to transform the facility into an integrated production hub for both toughened glass insulators and glass blocks, strengthening its industrial footprint and increasing production capacity to meet growing customer demand, including in the North American and Middle Eastern markets.
SGB is recognized as an industry leader in product quality, technology, and customer service – values closely aligned with SEDIVER’s own. SEDIVER will upgrade the overall production site and work in partnership with SGB’s management to advance the glass blocks business toward high-value, technology-driven solutions for customers, ensuring both continuity and innovation.
Unlocking new industrial synergies
“This acquisition is a natural extension of our industrial strategy. Partnering with SGB and expanding our capacity strengthens our leadership position in high-voltage glass insulators and unlocks new opportunities for sustainable growth and innovation.” — Erik Göthlin, CEO, SEDIVER
“We are entering a new chapter full of opportunity. SEDIVER’s investment will boost our production output and further improve glass quality. This means stability and growth for our employees, and greater service and opportunities for our partners.” — Petr Králík, CEO, SGB
“This acquisition underscores our commitment to building a resilient and forward-looking industrial group. We thank Progresus Group and Casper Group for their entrepreneurial ownership and commitment to SGB and look forward to driving its next phase of development and growth.” — Bill Tolley, Chairman of the Advisory Committee, SEDIVER
“We are proud to support SEDIVER in this strategic acquisition. The SGB furnace will allow SEDIVER to substantially increase insulator production, and support its utility customers in meeting the growing power needs of the AI revolution.” — Jürgen Pinker, Senior Managing Director, Blackstone
About the parties involved
About SEDIVER: SEDIVER is the world’s leader in transmission insulator technology. With over 75 years of experience on worldwide power networks and continued investments in R&D, SEDIVER has gained a true expertise in research, design, manufacturing, and testing of insulators up to very high voltages. SEDIVER ensures the highest reliability and performance of transmission systems throughout the service time of the line, under all environmental conditions. SEDIVER is your natural partner for all insulator applications. Further information is available at www.sediver.com and on LinkedIn.
About SGB: SGB is a global leader in the manufacture of glass blocks for architectural, design, and building applications. The company is headquartered in Duchcov, Czech Republic, and has a sales office in Florence, Italy. The company was founded in Duchcov in 1912 and has been producing glass blocks since 1955. SGB sells its products to over 100 countries through trade, distribution, and retail channels.
About Blackstone: Blackstone is the world’s largest alternative asset manager. We seek to deliver compelling returns for institutional and individual investors by strengthening the companies in which we invest. Our more than $1 trillion in assets under management include global investment strategies focused on real estate, private equity, infrastructure, life sciences, growth equity, credit, real assets, secondaries, and hedge funds. Further information is available at www.blackstone.com. Follow @blackstone on LinkedIn, X (Twitter), and Instagram.
Private equity funds affiliated with Blackstone acquired SEVES Group S.à r.l, the former parent company of SEDIVER, in 2024.
Press contact: info@sediver.com
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