Project Square ‑ Press Release

“This is not just a change of ownership, but above all an opportunity for growth and transformation. The new investor believes in our company and – most importantly – in our people. Their intention is to invest significantly in our production and our factory in order to increase quality and transform the facility into an integrated production hub,” said Petr Králík, General Manager of Seves Glass Block.

According to him, this investment will open new opportunities, and expand the company’s portfolio into new product lines such as glass insulators. “For our employees, this means stability and growth: more resources, new technologies, and the opportunity to learn and develop within a stronger organization. For our business partners it means continuity, reliability and even greater potential for future cooperation,” Petr added.

Lukáš Zrůst, Progresus Invest Holding, added: 
“For us at Progresus, this is a truly significant moment. Since acquiring Seves Glass Block, we succeeded in our main task to stabilize the company and introduce first‑rate and highly efficient production by building a new furnace, which is the heart of the production, and thereby secured the future of the company and its employees.

On this occasion, I would like to thank especially Petr, the General Manager, and the entire team of employees. They were the ones who cooperated with us to transform and improve the company. A big thank you also goes to everyone who contributed along the way – from colleagues in the plant to business partners and supporting institutions. Without their commitment and trust, this would not have been possible. In particular, I want to highlight the strong partnership in the transaction with Casper Group led by David Štekl. We are now proud to hand over Seves Glass Block into the hands of SEDIVER, backed by Blackstone. We believe that under the leadership of the new owners, the company is entering an even more successful stage, bringing growth, new markets and new opportunities.”

David Štekl, Founder and CEO of Casper Group added:
“For Casper Group, this transaction is proof that even complex situations can lead to success when they are built on trust and strong partnership. It has been an honor to contribute to developing SGB.”

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 Progresus: Progresus Group is an international investment group focused on sustainable residential and industrial development and the growth of traditional manufacturing companies. It owns and develops RD Rýmařov, the largest Czech timber house producer with over 50 years of history and 100,000 clients, and it successfully developed and exited in 2025 the world’s largest glass block manufacturer, Seves Glass Block. With annual revenues exceeding CZK 2 billion and more than 1,000 employees, Progresus is the largest developer of family houses in the Czech Republic, and its largest ongoing project is a new residential district of 1.2 million m².  Further information is available at https://www.progresus.cz. Follow @progresus on LinkedIn, X (Twitter), and Instagram.

About Casper: Casper Consulting is a leader on the Czech market in the fields of corporate restructuring and business recovery, financial management, and payment process optimization. With 30 years of experience and assets under management exceeding CZK 35 billion, the company is recognized for its long‑term stability and toptier expertise. Among its most significant milestones are a seven‑year exclusive cooperation with the leading U.S. investment bank J.P. Morgan Chase and the establishment of a joint venture with Raiffeisenbank. Casper has also successfully delivered projects with Santander and other major financial institutions.  Further information is available at https://www.casper.cz/index.html

The official press release issued by Sediver, part of the Blackstone portfolio, is available at www.sediver.com.