Press release


Antwerp & Kapellen, December 19th, 2023, 07:30 AM CET



Gimv invests in Castelein Sealants to accelerate European
growth
Gimv invests in the Castelein Sealants group together with management and
investment fund Akiles. The company, founded more than 15 years ago by
Christophe Castelein and Valérie Bioul, offers a wide range of customized air and
water sealing solutions, contributing to the sustainability of existing and new
buildings.

renovated buildings more sustainable and
meeting the latest energy efficiency criteria.
This is essential for realizing the energy transition
and fits perfectly within the team's investment
strategy.

Christophe Castelein and Valérie Bioul, co-
CEO’s of Castelein Sealants, declare: We are
very excited to join forces with Gimv to write a
new chapter to our European growth story.
After an already successful first entry of Akiles,
we have resolutely chosen Gimv in the context
of further professionalization and
internationalization, founded on mutual trust
Castelein Sealants develops, produces and
and a common vision. This partnership with
distributes air and watertight sealing products
Gimv solidly anchors Flemish innovation and
for the facade and window sector. The
sustainability in our region.”
company produces made-to-measure
sealants and delivers them just-in-time, which Ruben Monballieu and Catharina Soenen,
optimizes the construction process and greatly Partner and Principal Gimv Sustainable Cities,
reduces site waste. add: “We are delighted with this new
investment in Belgium. The unique match
Since its incorporation in Belgium, the company
between Castelein Sealants' mission and our
has grown strongly in the Netherlands and
platform strategy makes this a promising
Luxembourg in recent years, partly since the
addition to our portfolio. We can't wait to
entry of Akiles. The strengthened cooperation
realize the European growth plans together.”
between Gimv, Akiles and management is part
of a new Europe growth phase, in which the Christophe Rousseaux en Laurent Puissant, both
company initially wishes to invest further to Partner at Akiles, declare: “We share with
accelerate its current growth in France. enthusiasm the progress made since our
investment in 2020. Together with founders
Gimv has extensive experience in helping
Christophe and Valérie, we were able to
European companies realize ambitious growth
strengthen the structure and team, in line with
plans with the aim of creating sustainable value
our strategy as a minority investor in Belgian
for the economy and society. The Gimv
SMEs. This puts Castelein Sealants in an even
Sustainable Cities team is fully committed to
stronger position to take new steps towards
investments that contribute to sustainable
larger international markets together with
urbanization. The solutions offered by Castelein
Gimv, management and Akiles.”
Sealants contribute to making new and



Gimv NV - Karel Oomsstraat 37, 2018 Antwerp, Belgium - T +32 3 290 21 00 - www.gimv.com 1
Antwerp & Kapellen, December 19th, 2023, 07:30 AM CET

Press release




About Gimv About Akiles


Gimv is a European investment company, listed Christophe Rousseaux founded Akiles in 2019.
on Euronext Brussels. With over 40 years' Akiles is an "evergreen" investment fund supported
experience in private equity, Gimv currently has by experienced investment managers. With his
EUR 1.6 billion of assets under management. The experience as founder and CEO of Immoweb, his
portfolio contains around 60 portfolio companies, goal through Akiles is to support other successful
with combined turnover of EUR 3.7 billion and managers and long-term entrepreneurs to grow
more than 20,000 employees. their businesses. Akiles already participated in 13
companies and continues to search for Belgian
As a recognized market leader in selected gems to guide them in their growth.
investment platforms, Gimv identifies
entrepreneurial, innovative companies with high Website: www.akiles.be
growth potential and supports them in their
transformation into market leaders. Gimv's five
investment platforms are Consumer, Healthcare,
Life Sciences, Smart Industries and Sustainable
Cities. Each platform works with an experienced
team across Gimv’s home markets of Benelux,
France and DACH, supported by an extended
international network of experts.

Further information on Gimv can be found on
www.gimv.com.

For further information please contact:

Ruben Monballieu, Partner Sustainable Cities
T +32 3 290 21 20 – ruben.monballieu@gimv.com

Catharina Soenen, Principal Sustainable Cities
T +32 3 290 21 12 – catharina.soenen@gimv.com




Gimv NV - Karel Oomsstraat 37, 2018 Antwerp, Belgium - T +32 3 290 21 00 - www.gimv.com 2