ANNUAL20 REPORT COVER IMAGE IN-STREAM REVITALISATION OF THE WITIBACH Grenchen (SO) - The Witibach, which has some monotonous stretches that have been partially armoured with hard erosion-control measures, has been ecologically upgraded over a length of 1.5 km. Space limitations necessitated the use of in-stream measures which included various deadwood structures, gravel fills and sturgeon stones as well as site-appropriate tillering of the riverbanks. HOLINGER was part of an en- gineering consortium working on the project. CONTENTS

LETTER TO SHAREHOLDERS 4

SUBSIDIARIES 10

HOLINGER INGENIEURE GMBH, GERMANY 10

SWISSWATER GMBH, ZURICH 12

TK CONSULT AG, ZURICH 13

IBG AG, ZURICH 14

HOLINGER IC GMBH, ZURICH 16

BUSINESS AREAS 18

WATER SUPPLY 18

URBAN DRAINAGE 20

WASTEWATER 24

HYDRAULIC ENGINEERING 26

CONSTRUCTION 30

ENVIRONMENT 33

GEOLOGY 34

ENERGY 37

FACTS AND FIGURES 38

LOCATIONS 42

Annual Report HOLINGER AG 2020 3 LETTER TO SHAREHOLDERS

Dear shareholders, employees, clients, business HOLINGER Group sales growth and jobs expansion partners and friends, The coronavirus pandemic also had an impact on the Group's business performance, but the HOLINGER Group was able to During 2020, despite challenging conditions in the wake of increase its consolidated sales by 2.8% to CHF 62.7 million the coronavirus pandemic, HOLINGER succeeded in completing and grow own services by as much as 4.5% to approximately many exciting projects of all scopes and sizes. Therefore, we CHF 58 million. However, growth in revenues was unable are pleased to offer you some insight into our work in the to keep pace with the higher personnel costs and massive form of this annual report. increase in the IT security and licensing costs incurred during 2020. The HOLINGER team has concluded a remarkable fiscal year with a strong overall performance. In 2020, besides the change Despite generally satisfactory performance in the sector, we of management in the HOLINGER Group and the change of haven’t been able to pass on the significant cost increase to leadership in Western Switzerland, we were able to strengthen our markets and clients in the form of higher fees. Accordingly, our workforce and reach some important milestones in our the HOLINGER Group's annual result for 2020 of around Vision 2025+ strategic concept. CHF 1.4 million is 43.8% or CHF 1.1 million lower than the previous year. In addition to increased costs, the primary HOLINGER's future focus will be on comprehensive, one-stop driver of this result was currency losses against the Swiss franc services in our core areas of water, the environment and on items in USD and Euros, which reached a high of over energy. HOLINGER’s independent companies collaborate CHF 0.6 million in 2020. Order intake, on the other hand, within a network. We are united by common interests and the increased by a healthy 4% compared with the previous year. technologies, resources, infrastructures and knowledge that Work in hand actually increased by 9.1% to approximately we share. At the same time, each company has its own focus CHF 65.0 million. As a result, we entered 2021 with well-filled and priorities that reflect the characteristics of their clients, order books. Furthermore, despite a general industry-wide business areas and markets. shortage of qualified specialists, we were able to fill 21 full- time positions bringing our total number of employees to 527 2020 proved to be a difficult year. COVID-19 affected every at the end of 2020. aspect of life and generated many uncertainties and fears. The pandemic and the measures taken to combat it affected all our Digitisation improves efficiency and productivity fields of business and sites to a varying degree, but HOLINGER In recent years, HOLINGER has been proactively investing in responded immediately and with clear priorities. Our measures digital transformation. This benefited us in 2020, and will ensured the safety of our employees, secured services for our continue to do so in the coming years. Digitisation at HOL- clients and communities, and supported our business partners. INGER has lived up to our expectations so far and the overall As a result, we were able to provide an uninterrupted client experience has been positive. Almost all of our employees can service despite the persistently high levels of strain on all now access all documents and applications and co-work on our employees, and especially on those who had to provide projects from anywhere, at any time. childcare as well. Our in-house ICT department did a great job in 2020 and es- Our pandemic response cost us many man hours, while we tablished the necessary architecture within a very short period also had to compensate for increased rates of sick leave. of time. These increased investments in digitisation also had a Professional training and career development suffered as many positive financial impact as they helped us to serve our clients courses or conferences were cancelled. Like so many other better and deliver projects reliably at all times. companies, we faced the challenge of setting up home offices. This made informal contact among colleagues more difficult That said, HOLINGER’s digitisation is far from complete, and and there was a corresponding impact on interdisciplinary we will be forced to keep pace with increasingly demanding work. More time and effort was required to coordinate pro- IT and cybersecurity requirements. Furthermore, we will face jects. Nevertheless, despite the difficult conditions, our employ- more and more requests from our clients driven by EU Directive ees demonstrated great flexibility and exceptional dedication. 2008/114/EC regarding the protection of critical infrastructures Therefore, we would like to take this opportunity to express including plants and systems in the energy and water supply our sincere thanks to them and we promise to organise a joint sectors. celebration when conditions permit.

4 EXPANSION OF BASEL WWTP ON TRACK Basel – The expansion of the Basel WWTP began a good two years ago. Since then, the SBR reactors and the principal structures for the biological stage, including the quench fluid tank, have been constructed. The mechanical stage, which includes a screening plant, grit chamber, primary settling tank and shop building, has also been completed, and the expansion of the buildings and the assembly of the mechanical equipment is now in progress. The mechanical stage will be put into operation this autumn, and the biological stage in winter.

Annual Report HOLINGER AG 2020 5 In the short to medium term, we must increasingly focus on Public budgets have been severely strained, and tax revenues making better use of the opportunities and potential arising are more likely to fall in the short to medium term. As a from digitisation – specifically: improving collaboration, result, there is a risk that the public sector will adopt a cyclical efficiency, productivity and the transfer of knowledge. This will approach and review or postpone major investment projects. not be possible without intensifying training. We are stepping up our efforts to invest in long-term Sustainable growth and developing sustainable infrastructure and sustainable solutions now more than ever. solutions HOLINGER is superbly positioned, both financially and strategi- Society faces major challenges with regard to accelerating the cally, to shape the enormous industrial and social transforma- reduction of CO2 emissions as well as decarbonising mobility, tions that lie ahead. In Switzerland, we were able to strength- industrial production and the energy supply while making en our leading position in our core sectors. We will continue them sustainable. This includes the promotion of sustainable to expand our expertise and market presence, particularly in water management, the recycling of industrial water and inte- Western Switzerland. grated water resource management, as well as issues of water use and regulations concerning usage during increasingly During recent years, Germany evolved into a key market for frequent extreme drought events. It also implies that we need HOLINGER, particularly in the fields of water supply, urban new approaches to drainage planning, rainwater management drainage, wastewater technology and project management. and urban planning concepts for conurbations. We have now become one of the leading engineering compa- nies in Germany and will make targeted investments in market HOLINGER intends to make a contribution in these exciting expansion and human resources development. We will expand subject areas. We aim to be a trendsetter while capturing core areas such as environment and energy, and take advan- new business opportunities at the same time. In 2020, we tage of new opportunities to further our grow in the individual began selectively expanding our expertise in the areas of German federal states. energy recovery and water recycling. We have also set up the HOLINGER Sustainability Working Group to develop targets We are also pleased and reassured by our progress in Luxem- and measures that will ensure our steady improvement in these bourg and Saudi Arabia, where business has proven to be very fields. The working group is focused not only on reducing stable despite the economic and political uncertainties. resource consumption or achieving net zero CO2 emissions by 2030. It will also look at various aspects of economic and The ongoing evolution of the EU Urban Wastewater Directive social sustainability. will lead to minimum targets for nitrogen and phosphorus at the European level. The goal is to improve river and lake Promoting innovation water quality, so presumably, the expansion of wastewater Each year, the HOLINGER Group invests approximately 15% of treatment plants with more advanced purification processes or our cash flow into our own development projects in various ar- other measures for reducing the problem of trace substances eas of technology. Not only does this help us to keep pace with will also be stipulated at the European level. HOLINGER has the latest developments, but it provides an impetus for the thorough knowledge, efficient solutions and project references application of new technologies and processes, which allows in all these areas. However, we will have to position ourselves us to be an industry leader with a competitive advantage. For better in individual European markets through targeted joint example, we are developing digital models, additional uses of ventures or participating interests in order to be able to BIM data, technologies for the reuse of water, and test plants derive a long-term benefit from the expansion of wastewater with new processes for the elimination of trace substances. treatment plant infrastructures in EU countries. This year, we are launching the HOLINGER Innovation Award – an internal challenge that will promote interdisciplinary The demand for our expertise in the areas of water, environ- cooperation and encourage our employees to innovate. ment and energy will continue into the future, and our devel- opment opportunities in Switzerland, Europe and international Bright prospects markets remain promising. We must improve our position in The current high volume of work in hand means that terms of acquisition, knowledge management and support for HOLINGER's capacity will be well utilised during this and the our clients as well as the optimisation of our regional market forthcoming years; however, we cannot rule out the possibility access and networks. We also need to make greater use of that we will feel some delayed consequences of the pandemic. synergies.

6 CHALLENGING ROADWORKS IN A PANORAMIC LOCATION Montreux (VD) – The extensive recon- struction work on Rue du Temple will include widening the road, renovating and reinforcing the support structures for the cantilevered footpath, repairing the retaining wall, and restoring the utility conduits and pavement. As project manager, HOLINGER is also required to coordinate the project. Although space is tight, traffic and access to the premises must be guaranteed during the construc- tion period.

Annual Report HOLINGER AG 2020 7 vv

People and profits As, unfortunately, the Federal Office of Public Health post- As for revenues, we expect additional increases in the mid poned firm decisions regarding easing restrictions on events, single-digit range. In 2021, we should benefit from invest- and there are still very strict limitations on in-person gather- ments in digitisation that result in greater efficiency and a ings, we have decided to reschedule the HOLINGER AG Gener- return to the profitability levels and profit margin of 2019. al Meeting originally planned for 9 June 2021, to Wednesday, Due to a satisfactory capacity utilisation situation, we expect 1 September 2021 at 5:00 p.m. We ask for your understanding an additional increase in personnel in 2021 and beyond, of a and look forward to seeing you then. similar magnitude as in 2020. At the Annual General Meeting, we will propose for 2020, Our focus is on the recruitment of experienced specialists, a tax-free capital distribution of CHF 367 000 and an ordi- university graduates and engineers from various fields. Due to nary dividend of CHF 850 000. This corresponds to a total the coronavirus, we now need to catch up in terms of training profit distribution of CHF 1.217 million and a distribution employees in the handling of digital tools and in terms of of CHF 0.61 per registered share with a nominal value of their professional development. As an attractive and modern CHF 0.20 and CHF 6.11 per registered share with a nominal employer, we hope to attract more talent throughout Europe value of CHF 2. The net return per share is 8.3%. The share and particularly from Switzerland. value increased to CHF 73.50 and CHF 7.35 per share, respectively. To continue to be successful, everyone at HOLINGER has to use their skills and abilities for the good of the company. In addition, the Board of Directors has decided to pay a Independent ideas and responsible actions are vital, as is a one-off bonus totalling CHF 375 000 to the employees of the readiness to share knowledge and experience with colleagues. HOLINGER Group. This is the only way can we achieve a continuous transfer of knowledge. Sincere thanks In future, for our clients, and with our clients, we intend to HOLINGER is one big family whose members support each develop and implement more trailblazing projects. We will do other. Whether the times are good or bad, we maintain that by boosting interdisciplinary cooperation and via initiatives relationships with each other that are appreciative, under- such as the Innovation Award. Development projects as well standing, respectful, open and fair. These, our values, have as the targeted development of expertise in the field of energy been particularly important as a source of security for everyone will also play an important role. during the coronavirus pandemic. Every employee can help ensure that things stay this way or become even better. Are you one of our esteemed clients? Your openness and your courage make new things possible. Together, we can set Ownership structure, key performance indicators milestones for a sustainable future. We would like to thank and development of HOLINGER stock you for your trust and look forward to working on more The employee participation model has been met with great in- exciting projects with you. terest and is increasingly proving to be an important and stable asset for HOLINGER. As a shareholder, you help determine the Are you an employee? You are making a significant contribu- success of our company and are directly involved in its growth tion to the development of innovative, sustainable projects and success. HOLINGER's total share capital is currently in the with your commitment, expertise and ideas. You are the key to hands of 147 active employees. The Board of Directors and a satisfied clientele and the success of HOLINGER. Our heartfelt the Management Board will continue striving to ensure that thanks for your commitment and your will to make outstand- HOLINGER remains an interesting investment and an attractive ing things happen. employer, both now and in the future. Excellent teamwork with our business partners and the trust We measure capital efficiency as return on equity after taxes. and support of our shareholders have also been key factors in The HOLINGER Group's equity decreased by CHF 0.2 million our positive development. Thus, we owe our partners a great to CHF 15.6 million in 2020. The return on equity fell to a debt of gratitude as well. below-average 9%, primarily due to the currency adjustments required for accounting purposes. We look forward to continuing to implement exciting projects and initiate innovations with all of you.

8 vv

Sorrow and great gratitude Our long-standing Chairman of the Board of Directors and Branch Manager of the Liestal headquarters, Werner Meier, succumbed to a serious illness on 9 May 2021, shortly before his 73rd birthday. “Our society faces major challenges He was a humble man, who shied the limelight. Yet, more than anyone, for 48 years, he shaped and moulded HOLINGER AG with regard to with heart and soul. His open, cheerful nature, his invariably positive approach, his sympathetic leadership style and his accelerating the entrepreneurial spirit spurred us all on. He enjoyed great recognition and trust among our clients and business partners. reduction of CO2 Without Werner Meier, HOLINGER would not be where it is emissions as well today. We owe him an extraordinary debt of gratitude, that goes far beyond what words can express. as decarbonising

All of us at HOLINGER mourn his loss and offer our deepest mobility, industrial sympathies to his wife, children and relatives during this difficult time. Werner Meier will live on in our thoughts, and production and HOLINGER will continue to develop in the way that he would the energy supply have wanted. while making them Liestal, May 2021 sustainable.”

Dr Uwe Sollfrank Peter Rudin Chairman of the Chairman of the Board of Directors Executive Board

Annual Report HOLINGER AG 2020 9 HOLINGER INGENIEURE GMBH GERMANY. SUCCESS DESPITE DIFFICULT CIRCUMSTANCES

2020 was an exceptional and challenging year for HOLINGER Ingenieure GmbH. The coronavirus pandemic required a great deal of flexibility as well as more digital collaboration. Un- fortunately, the long-planned ten-year company anniversary celebration also fell victim to the pandemic. Despite difficult circumstances, the company succeeded in expanding its portfo- lio and establishing new areas of expertise.

winning engineering competitions. Some of the projects, which also demonstrate the active cooperation within the HOL- INGER Group, are showcase projects, including:

• the construction of three new waterworks as part of the Lake Constance Water Supply project, "Source of the Future – Water for Generations" • the Heidelberg Wastewater Asso- ciation project to set up a fourth purification stage in their northern wastewater treatment plant • a project for the expansion of the Tübingen wastewater treatment plant: Construction of fourth purification stage sludge treatment system at the Em- schermünde wastewater treatment plant. The coronavirus pandemic has had a Despite the difficult circumstances, we significant impact, directly or indirectly, were able to establish two new depart- These demanding tasks will keep our on almost all private, social and profes- ments in 2020. With Technical Building engineers busy for many years to sional spheres. In addition to keeping up Equipment and the Renewable Energies, come and will require some flexibility, with our day-to-day project work, we which is focused on solar energy, HOL- particularly during the initial phases, prioritised the digitisation of workflows INGER Ingenieure will be able to live up which are still being influenced by the and expansion of IT. This process will be to its "one-stop engineering services" pandemic. completed during the first quarter of motto even better than before. 2021. HOLINGER Ingenieure GmbH will emerge In all areas, human resources have from the coronavirus pandemic even Virtualisation and the use of appropriate been built up both quantitatively and stronger than before and will continue software now facilitate simultaneous, qualitatively thanks to the on-the-job to pursue its strategy persistently. Our location-independent work on project theoretical and practical training and highly qualified employees are tackling models and the combination of several certification of many employees. Some their upcoming exciting and challenging specialist plans in a single model. This project employees have been promoted tasks with great enthusiasm. Thus means that specialists can work on to project managers. HOLINGER Ingenieure will be able to add projects and contribute their expertise a chapter on Germany to its ongoing no matter where they are. This virtual HOLINGER has once again demonstrated success story in keeping with the motto cooperation has brought the HOLINGER its expertise in numerous ongoing "comprehensive engineering services Group even closer together. projects and recorded a more than for water, environment and renewable gratifying order intake, in particular by energies".

10 NEW CONSTRUCTION OF FOURTH PURIFICATION STAGE Heidelberg – HOLINGER has won the competition for the construction of the new fourth purification stage and for enhancing the performance of the phosphorus elimination process at the Heidelberg wastewater treatment plant. Our many references and wide SOLAR ENERGY FOR THE DISTRICT WATER FOR GENERATIONS range of technologies for the elimina- OF CONSTANCE Lake Constance – As a partner of Lake tion of micropollutants proved to be Constance – The Hausach branch won Constance Water Supply, HOLINGER a competitive advantage. The order the engineering competition held by the will play a major role in the "Source of will be handled by the Baden, Liestal, district of Constance for the planning, the Future – Water for Generations" Merklingen and Hausach branches, tendering and construction of 29 photo- project over the next few years. The whose teamwork is renowned. voltaic (PV) and solar thermal systems on knowledge and commitment of the fourteen properties. In cooperation with entire HOLINGER Group will flow into the district, HOLINGER is developing an this unique showcase project, which will overall approach to the allocation of be implemented in cooperation with rooftop surfaces with PV systems. The a partner. The ceremonial signing of load profiles of each of the individual the engineering contract took place in properties will be evaluated in order to October of 2020. enable them to provide as much of their own electricity as possible.

Annual Report HOLINGER AG 2020 11 SWISSWATER GMBH ZURICH. SWISSNESS FOR CHINA

The activities of SWISSWATER GmbH, with a focus on China, were strongly influenced by COVID-19, and some of the work “Comprehensive in progress had to be interrupted in 2020, as travel to China knowledge increases ground to a halt. Nevertheless, the construction of a small wastewater treatment plant in the Shandong Province was our ability to make completed on schedule. a substantial With an eye on maintaining relationships with our existing and potential clients, we held several virtual meetings, and our local representatives travelled to Neijiang, contribution to in the Szechuan Province to prepare a Memorandum of Understanding which was improving water signed in a ceremony on 4 February 2021. quality in many areas of water management.”

CONSTRUCTION OF A SMALL WASTEWATER TREATMENT PLANT In January of 2020, before the travel restrictions were imposed, our employees undertook one last mission. SWISSWATER created the concept for the local design institute and implemented parts of the detailed planning for a small wastewater treatment plant which was commissioned in the autumn. The plant, which serves as a model system for a village with around 1000 inhabitants, was built under a small park that now serves as a meeting place for young and old. SWISSWATER will conduct the final inspection in 2021.

12 TK CONSULT AG ZURICH. NUMERICAL MODELLING

TK Consult AG has implemented some exciting simulation pro- jects and intensified cooperation within the HOLINGER Group, particularly in the fields of groundwater and 3D CFD.

A special highlight in the area of Surface Water was the production of a hazard map for the City of Zurich showing the Sihl, Limmat and Schanzengraben rivers as well as the lake basin. The method developed in the process, which incorporates bridges and culverts in numerical 2D models, was published in the journal, "Wasser Energie Luft" and thus made accessible to a wide range of experts.

In the field of groundwater, TK Consult developed its first groundwater model for Germany in cooperation with HOLINGER. It was also particularly gratifying to have received a request from the Austrian Water Association to participate in the Ground- water Modelling Working Committee.

PRESSURE FIELD IN THE MUSCHELKALK A vegetable producer in Thurgau uses geothermal energy from two boreholes that have been in oper- ation on a test basis since 2018. TK Consult had previously created a hydrothermal groundwater model for the boreholes. Because a licence OPTIMISATION OF AN BETTER UNDERSTANDING OF is now required to use the wells OZONATION PLANT THE FLOODING PROCESS on a permanent basis, TK Consult An on-site tracer test conducted at a Flooding events during the winter of has updated the numerical model, WWTP with an ozonation system that 2017/2018 caused landfalls in the area modelled the effects of drilling on had suffered from suboptimal cleaning where the river Wiese flows into the the pressure heads in the Muschel- performance during rainy weather Rhine and in the downstream Rhine kalk and evaluated the maximum indicated a hydraulic short circuit and Harbour. On behalf of the Basel-Stadt extraction volume. major dead zones in the ozone reactor. canton, TK CONSULT analysed the In order to obtain a better understand- events using 2D bedload transport ing of the hydraulic processes and simulations and on-site echosounder derive targeted optimisation measures, surveys. The resulting understanding TK Consult created a 3D CFD simulation of the process will serve as a basis for from which it derived measures such as future revitalisation projects on the additional barriers and flow straighten- Wiese and structural adjustments to the ers. Rhine Harbour.

Annual Report HOLINGER AG 2020 13 IBG AG ZURICH. EVERY DROP COUNTS

IBG AG strengthened its global market position for engineer- ing services with a focus on water supply – despite pandem- “Clean drinking ic-related restrictions. The team overcame the challenges with water is still not a the help of digital solutions. given everywhere; Although the acquisition of major projects on the world market was delayed, IBG has won major detailed design and commissioning projects in Saudi Arabia, including this is a major a project for one of the largest water tank farms in the world. IBG has successfully challenge for implemented new concepts for commissioning with an online service and is currently one of the leading companies in this field. specialists

Compared with the previous year, the company increased the utilisation of its capaci- and societies.” ty, boosted earnings and exceeded its targets. Thanks to its extensive experience and innovative solutions, IBG is well equipped to meet current and future challenges.

FOUNDATION FOR GIGANTIC We modelled both foundations with WATER TANKS finite elements using the FENAS soft- One of the most important tasks in any ware program. Coordinating with the project in Saudi Arabia is the structur- construction company to ensure that we al analysis of the foundations. In this obtained detailed information on the case, the enormous loads from the steel structure of the water tank and the water-filled steel tank are borne by “ring geological conditions in a timely manner beams”. Last year, we designed two was highly challenging. We also had to “ring beams” for the “Al Qunfudhah” incorporate the specifications of the test project: firstly, a small foundation for a engineer. We are proud to announce water tank with a diameter of 45 m and that our two “ring beams” have been a volume of 25 000 m3 and secondly, a approved and constructed. larger foundation for a 50 m diameter tank with a volume of 30 000 m3.

14 IBG AG ZURICH. “At ENVILAB, I experience EVERY DROP COUNTS the perfect mix of routine with new, diversified tasks. The fact that I can work on finishing my degree part-time is very attractive to me.”

Janine Simon, Analyst ENVILAB AG, Zofingen

Annual Report HOLINGER AG 2020 15 HOLINGER IC GMBH ZURICH. SOUGHT-AFTER WATER EXPERTISE

International activities were severely restricted by the pan- demic. Travel came to a complete standstill, and operations could only be monitored digitally from Switzerland. Neverthe- less, our projects in Kyrgyzstan, Tajikistan and Uzbekistan are well on track, for which we also thank reliable local partners.

Most initial meetings for newly won projects were postponed because of COVID-19. Now, in 2021, HOLINGER International Consultants is getting to work on our projects in Northern Macedonia, the Democratic Republic of Congo and Uzbekistan. In addi- tion to projects in the Wastewater and Water Supply departments, we were able to acquire smaller projects in the fields of hydraulic engineering and climate resilience. Another highlight is the project for strengthening institutional support and increasing effluent disposal capacity in south-eastern Europe.

EXPANSION OF THE PETINGEN WASTEWATER TREATMENT PLANT PROGRESSES Luxembourg – The expansion of the Petingen wastewater treatment plant to 115 000 p.e. (population equivalents) is well advanced after two years of construction. The work, which is being carried out during CLEAN DRINKING WATER FOR THE TRAINING OF WASTEWATER ongoing operations, is proceeding CITY OF BIHAC TREATMENT PLANT SPECIALISTS as planned. The principal structures Bosnia-Herzegovina/Croatia – Two South Eastern Europe – The German So- are nearing completion, and the springs supply drinking water for the ciety for International Cooperation (GIZ) electromechanical outfitting is in full 60 000 inhabitants of the town of Bihac, has a programme with which it hopes swing. Initial start-up is scheduled Bosnia-Herzegovina. Its catchment area, to strengthen the wastewater sector in for June of 2021. HOLINGER is in 90% of which is in Croatia, is located in south-eastern Europe and has com- charge of project management and a karst region. In a study for the World missioned HOLINGER to formulate and site supervision. Bank, HOLINGER identified the negative implement development programmes. environmental impacts, assessed the The programmes will focus on building groundwater protection zones and the up strategic and economic expertise legal framework and proposed measures at the management level as well as on for maintaining good drinking water the professional development of the quality. wastewater treatment plant personnel in the areas of technical operation and maintenance.

16 WASTEWATER INFRASTRUCTURE IN LUXEMBOURG RENOVATED Luxembourg – The renovation of the wastewater infrastructure around the Obersauer reservoir, Luxembourg's most important drinking water reserve, is largely complete. Back in 1999, HOLINGER began work on the overall concept and the preliminary study for the large-scale project, which includes 24 lift (or pump) stations, 29 stormwater basins and 35 km of pressure lines. Several lift stations and stormwater basins were also planned and constructed. Some of the lift stations are equipped with oscillating positive displacement pumps.

Annual Report HOLINGER AG 2020 17 WATER SUPPLY DIVERSE PROJECTS ACROSS BORDERS

In Water Supply, we succeeded in maintaining the previous year’s level of income from own services and winning signifi- “Our success is built cant new projects. on interdisciplinary New acquisitions included the addition of three ultrafiltration plants to the Lake collaboration Constance water supply system and a CARIX process water softening plant in Bars- inghausen, both in Germany. A noteworthy project in Switzerland is the lake water involving our treatment plant for the "Mendrisiotto Regional Aqueduct". HOLINGER will also be part of a consortium developing a water supply master plan for the German Federal project teams and State of Baden-Württemberg. our clients.”

Climate change presents many water suppliers with challenges that call for new, sometimes supra-regional solutions. The pollution of water resources with pesticide metabolites will also continue to occupy our experts.

Share of own services income WATER SUPPLY GROUNDWATER LIFT STATION FOR AN ENTIRE REGION Thürnen (BL) – A new groundwater lift station guarantees security of supply for the Sissach region. The lift station is located in a tributary valley of the Ergolz River and 19% serves several communities as a second mainstay for water supply. HOLINGER was involved with the project from the feasibility study to initial start-up. The operations building was designed by two local artists.

18 BERNHAU RESERVOIR GETS A NEW LOOK Affoltern am Albis (ZH) – The renovation of the Bernhau water reservoir, built in 1951, was successfully completed in June of 2020. HOLINGER executed the complex project during a ten-month construction period which involved the demolition of partitioning walls and stairs, the renovation of pumps and the replacement of all pipework and remote control equipment. The reservoir facility remained in operation throughout the entire reconstruction process thanks to careful provisional arrangements and proactive planning.

Annual Report HOLINGER AG 2020 19 URBAN DRAINAGE CONTINUOUSLY ESCALATING CHALLENGES REQUIRE CREATIVE IDEAS

There are constantly increasing challenges in the Thanks to constant training and professional development, field of urban drainage. Rainfall is becoming more our employees are kept up to date on the latest technological dynamic, while water protection and security needs advances: Furthermore, they actively support developments in are increasingly complex. various professional associations and are involved in the training of future specialists at some universities. The mix of tasks is what makes the assignments handled by the widely expanding Urban Drainage team exciting. These include, The team has no shortage of ideas, which is evident from the for example, innovative drainage systems for superstructures, great interest in HOLINGER's own development projects in the drainage concepts for the future, water protection measures or field of urban drainage. solutions for the management of entire wastewater networks. The team has numerous tools at its disposal – calculation pro- grams for hydraulics, sediment load, control systems, probes, CAD and GIS.

ASSESSING THE CONDITION OF SITE GENERAL DRAINAGE PLAN LAKE MURTEN, PHOSPHORUS PRIVATE WASTEWATER SYSTEMS FOR HOLISTIC PLANNING BALANCE Thun (BE) – HOLINGER has been Wohlen/Villmergen (AG) – HOLINGER Lake Murten (VD, FR) – For the Office of commissioned by the City of Thun to drew up a general drainage plan (Site Environment of the Canton of Fribourg, document the condition of private GDP) for the Ferrowohlen AG industrial HOLINGER is studying ways to further wastewater systems within three site. This was approved by the Canton of reduce the phosphorus content in Lake zones in the Untere and Obere Wart Aargau at the end of 2020. These types Murten. The study includes recommen- area. The area comprises 70 properties of holistic drainage plans are an essential dations for future regional wastewater and section lengths or approximately working tool for operators and authori- treatment plants and agriculture. 7.5 km. Experience has shown that it ties to efficiently handle operations and takes about a year to survey a zone and projects for future extensions. submit a dossier. Despite the pandemic, the work on site was carried out swiftly and without complications.

20 CONTINUOUSLY ESCALATING CHALLENGES REQUIRE CREATIVE IDEAS

“Having a high degree of independence in terms of organising my work and managing projects allows me to optimise my development. I'm motivated by the fact that our projects help protect the environment and our habitat.”

Dominique Moesch, Head of Urban Drainage Liestal, HOLINGER AG, Liestal

AESCH NORD ROAD RUNOFF RETENTION PLANT FOR NEW TREATMENT PLANT ECO DISTRICT Aesch (BL) – HOLINGER is building a Echallens (VD) – As part of the develop- road runoff treatment plant in Aesch as ment of a future eco district, HOLINGER part of a FEDRO maintenance project. planned and constructed a rainwater The two-stage process consists of a split retention basin with plastic structures. filter and a planted sand filter, with a The technology that was selected total filter area of 450 2m and a storage facilitated a very quick, cost-effective volume of approximately 900 m3. The implementation. Share of own services income pumping station has a delivery rate of URBAN DRAINAGE 100 l/s. This means that rainfall events with a return period of one year can also be handled.

16%

Annual Report HOLINGER AG 2020 UPGRADING RAFZERFELD’S STORM- WATER OVERFLOW BASINS Rafz (ZH) - HOLINGER has equipped all four stormwater overflow basins of the Rafzer- feld Wastewater Association with continu- ously adjustable measuring and throttling devices. This allows for continuous monitor- ing, control and regulation of the discharge volumes. The Rafz stormwater overflow basin was also extended. The integration of the devices into the Hohentengen WWTP process control system allows for the control of the stormwater overflow basins to be coordinated in a subsequent step.

22 “I like the fact that we are working for water conservation. I find it exciting to collaborate with such a variety of professionals and follow through with the structural implementation of solutions.”

Rahel Waldvogel, Project Manager HOLINGER AG, Winterthur

Annual Report HOLINGER AG 2020 23 WASTEWATER DECISIONS WITH A LONG-TERM EFFECT NEXT GENERATION WWTPs

Wastewater treatment plants (WWTPs) have a The next generation of wastewater treatment plants will release

service life of approximately 30 years. Many very low emissions of climate-relevant gases such as CO2, ni- plants require upgrading after five to ten trous oxide and methane. These gases will increasingly be used years. HOLINGER has supported numerous for the production of energy as biogas is processed and fed into

wastewater treatment plant operators in the natural gas grid as a CO2-neutral energy source – certified taking proactive decisions. with the Naturemade Star label. Meanwhile, photovoltaic modules above the clarifiers will also generate electricity. In order to ensure sustainable and cost-effective, professional wastewater treatment, many smaller wastewater treatment HOLINGER’s Wastewater and Energy departments work in close plants are being closed, in favour of larger plants. Larger collaboration within the framework of a technology group ded- plants must, in turn, eliminate micropollutants from the icated to the planning of future-oriented wastewater treatment wastewater. HOLINGER has been involved with several plants of this type. merger projects, evaluated suitable procedures for new stages and developed supra-regional solutions for the recovery of phosphorus from sewage sludge, which will become mandatory as of 2026.

FEWER MICROPOLLUTANTS IN THE REFURBISHMENT OF DIGESTERS & DISCHARGE OF WASTEWATER DOUBS RIVER REPLACEMENT OF AGITATORS CONTAINING BROMIDE La Chaux-de-Fonds (NE) – The WWTP in Mendrisio (TI) - HOLINGER restored the Zurich – With the installation of a La Chaux-de-Fonds is slated to have an concrete components of the two digest- micropollutant-elimination stage at the additional stage added for the elimi- ers and stackable sludge containers at Werdhölzli WWTP, the discharge of nation of micropollutants. The site has the Mendrisio WWTP. After the surfaces wastewater containing bromide into the tight space constraints and is subject to were removed using hydrojetting sewer system is no longer permitted. strict discharge regulations. HOLINGER and sandblasting, leaking areas were This is because carcinogenic bromate designed a plant with powder-activated sealed by means of injections. Finally, is formed during the ozonation of carbon and sand filtration with a flow a synthetic resin coating was applied. bromide. The Hagenholz waste inciner- rate of 550 litres per second. Now, we The two stackable sludge containers ation plant must therefore discharge its are managing the implementation of the were equipped with new, double-bladed wastewater, which contains high levels entire project. agitators made of stainless steel. of bromide, separately. For this purpose, HOLINGER has built two pump stations and two 9-km long pressure lines. They are attached to the ceiling of the weight-bearing sewer tunnels.

24 DECISIONS WITH A LONG-TERM EFFECT NEXT GENERATION WWTPs

“I have the opportunity to work on projects in a variety of areas. Teamwork is required and encouraged and there is plenty of flexibility, which helps me to find a good balance between work and family life.”

Luca Tomaselli, Project Engineer HOLINGER AG, Besazio/Mendrisio

DIGESTER RENOVATION NEW STATE-OF-THE-ART WWTP Cham (ZG) – After more than 40 years, Collombey-Muraz (VS) – Due to signifi- the digester at the Schönau WWTP is be- cant growth of the local population and ing renovated and its capacity increased. the advanced age of the plant, the time The contract, which HOLINGER won in has come for the complete renovation of a public tender, includes the complete the Collombey-Muraz WWTP. HOLINGER replacement of all technical equipment, is planning and implementing the a fresh sludge thickening system and project which will double the hydraulic a new gasometer. The submissions capacity of the plant and ensure highly Share of own services income were made and initial work carried out efficient wastewater treatment. A new WASTEWATER in 2020 following the approval of a discharge route to the Rhone will ease construction loan of CHF 9.9 million. the burden on the Canal du Bras Neuf. The plant will go into operation in 2022. In addition, biogas will be fed into the natural gas grid, and heat will be recov- ered from the treated wastewater.

33%

Annual Report HOLINGER AG 2020 25 HYDRAULIC ENGINEERING ACTIVELY TACKLING NEW CHALLENGES NETWORKED AND HOLISTIC

Sustainable, innovative solutions for hydraulic Dealing with aging protection systems also requires new engineering are in demand, particularly those concepts. In addition, we are increasingly working with risk which take the effects of climate change into analyses in order to make target-oriented decisions. account or provide for the sustainable use of resources. Numerous interests are involved in hydraulic engineering pro- jects. That is why HOLINGER develops its solutions in collabora- In Hydraulic Engineering, besides the classical issues of flood tion with all project participants and pursues approaches that safety and revitalisation, we are currently dealing with the are socially and economically viable. This requires networked, effects of climate change. holistic thinking that doesn't lose sight of the details.

Our work includes conducting comprehensive studies of catchment areas, looking at hydrology, bedload and driftwood. Meanwhile, we are developing new approaches to hazard assessment.

GÖTZENTALBACH FLOOD PROTEC- FLOOD PROTECTION/REVITALISA- FLOOD PROTECTION AND ECO- TION TION OF THE MÜLIBACH, ALTNAU LOGICAL UPGRADING Dierikon (LU) – in 2015, a flood caused Altnau (TG) – The flood risk in the Wallbach (AG) – High water levels in the major property damage and two deaths. municipality of Altnau was largely due to Rhine regularly threaten the community Because of this, interim measures were the insufficient capacity of the Mülibach/ of Wallbach. HOLINGER has developed a taken in 2016, and a bedload and drift- Dole. In order to mitigate the risk, the flood protection project that is a perfect wood retention system was installed; course of the stream was opened up for fit for the centre of the old village. HOLINGER has been managing the 240 m to create a continuous low-water Structural flood protection is ensured by watercourse development work since channel with a structured streambed. a 50 cm wide retaining wall which also 2020. Specialists in hydraulic engineer- This has restored the stream’s longitu- serves as the basis for the mobile flood ing, geotechnical engineering and civil dinal connectivity and created some protection truss system. A set of blocks engineering are being called upon to near-natural spaces. The wide water- with fascines and vegetation, triangular build two new culverts, construct 290 course, site-appropriate planting, and groynes and the placement of dead- additional metres of watercourse and the installation of seating areas also wood ecologically enhance the course of extend the existing stream to 450 m by make for an attractive local recreation the river. early 2022. area.

26 “Hydraulic engineering processes require a holistic approach. We develop tailor- made solutions that reconcile the needs of nature and people.”

RISK ANALYSIS AND SURVEY OF REMEDIATION OF THE BEDLOAD MEASURES BALANCE Biel (BE) – The city centre of Biel is Schwyz Canton – The Alp River is an threatened by large-scale flooding of the important source of bedload for the Schüss. On behalf of the city and the downstream Sihl and Limmat Rivers. canton, HOLINGER created a risk profile HOLINGER is planning measures to that calculated, evaluated and prioritised ensure that there is sufficient bedload the risks according to FOEN (Federal along the entire watercourse system Office of the Environment) standards. A and to prevent siltation of the riverbed. Share of own services income study has also identified a wide range The project contributes to the ecological HYDRAULIC ENGINEERING of measures for reducing the risks. The upgrading of the rivers and to the opti- overall project involved a risk dialogue. misation of watercourse maintenance.

7%

Annual Report HOLINGER AG 2020 27 “HOLINGER offers ideal on-the-job training opportunties. My colleagues are very appreciative and supportive, and I can get involved, give inputs and take responsibility.”

Puviyalan Thamilnesan, Trainee draftsman EFZ, 2nd year apprentice, HOLINGER AG, Olten

28 “The construction industry is in the midst of a digital transformation. The outstanding training opportunities at HOLINGER make it possible to keep up with technology.”

Philippe Häller, Project Manager, BIM Coordinator HOLINGER AG, Ecublens

Annual Report HOLINGER AG 2020 29 CONSTRUCTION DIGITAL PLANNING AND NETWORKING OF THE TRADES IS BECOMING STANDARD

In the planning and realisation of a wide range using the 3D or BIM methods and for interdisciplinary network- of projects, from geotechnical subsoil studies, ing and coordination on digital platforms. Digital planning is to supply and disposal, to the realisation of proving to be an important tool in day-to-day project manage- the supporting structures, HOLINGER's con- ment, and especially in the context of the COVID-19 pandemic. struction experts offer in-house support to our other business areas and external support to Even "Little BIM", the BIM method practiced at HOLINGER, architects and clients. offers great advantages, in that the models facilitate coordina- tion and planning in the early project phases, which noticeably Thanks to the high demand in all regions including the new increases the quality of the planning. In addition, cost calcula- location in Ticino, in-house work and incoming orders have tions or bills of quantities can be created more easily thanks to increased again. quantitative models.

Digitisation continues to advance both for infrastructure projects in the public sector and for private residential and com- mercial buildings. There is an increasing demand for modelling

BIM FOR “DWEG” RESIDENTIAL COMPLEX EARTHQUAKE CHECKS DEVELOPMENT FOR HYBRID BUILDINGS Liestal (BL) – HOLINGER has created a 3D Bern (BE) – HOLINGER performed an model for the structural design of the earthquake check on a listed building three to four-storey development with pursuant to the new SIA standard 269/8 approximately 100 flats, a car park and a for both the preliminary project and gross floor area of 11 400 m2. From this construction project and defined the model, we were able to derive the cubic necessary reinforcement measures. The volumes of concrete and areas of the earthquake checks were highly complex formworks and sort them according to due to the hybrid construction method the NPK (Swiss standard items cata- with masonry walls, wood-beam ceilings logue). The model will be refined and and wood/concrete composite ceilings supplemented with special reinforce- as well as concrete ceilings and steel ments and serves as the basis for the skeleton structures in the subsequently final plans for formworks and rebar. built extension.

30 DIGITAL PLANNING AND NETWORKING OF THE TRADES IS BECOMING STANDARD “From planning to construction, interdisciplinary expertise in all areas of civil engineering is a prerequisite for sustainable design.”

NEW CABLE FEED IN THE OLD SUPERCOMPLEX IN SION RAILWAY TUNNEL Sion (VS) – The "Cour de Gare" com- Göschenen (UR) – Starting in 2022, ex- plex is being built near Sion railway cavated material will be produced during station. The land-use plan provides for the construction of the new Gotthard six mixed-use buildings. In addition to road tunnel. FEDRO is constructing a 302 flats, a total of 5 400 m2 of retail loading station to handle the removal space, 12 000 m2 of offices, 7000 2m of of this excavated material. Meanwhile hotel space (approx. 100 rooms) and a the SBB is building a new electronic concert/congress hall are being built for Share of own services income signal box, including new cable and the city of Sion. The buildings will be CONSTRUCTION signalling systems, between Wassen and constructed on a common foundation Airolo for which anchoring and cable with a two-storey underground car park. feeds are being refurbished in the old HOLINGER is constructing two of the Gotthard railway tunnel. Due to the tight buildings. clearance profile, the cable conduits are embedded in the masonry. 11%

Annual Report HOLINGER AG 2020 31 KVA IBACH - THE END OF AN ERA

Lucerne – After 49 years, the Ibach waste incineration plant is being decommissioned and remediated. The largest dismantling excavator in Europe is in operation and recyclable materials are being carefully separated. HOLINGER has been involved in the complex project from the decommissioning and the inventory of the building pollutants, to the preparation of a concept for its subsequent use.

32 ENVIRONMENT VARIED TASKS VARIABLE REQUIREMENTS

Our Environmental services were in high demand during 2020. The projects were very diverse in terms of task and size, as “We see the were the interests that came together in the process. promotion of Our specialists inspected and renovated shooting ranges, dealt with fee-setting for sustainability – wastewater at the municipal level or with wastewater associations, and handled landfill and quarrying projects, from the overall project planning stage to dealing with both in-house and the relevant environmental issues. Even several small jobs, such as determining the indoor air quality of a single room, were carried out effeciently and conscientiously. in our projects – as Clients, authorities, those affected and the wider public all have quite different our duty and as an expections when it comes to environmental impact statements and issues relating to pollutants or dismantling and disposal. The various interests must be weighted within opportunity for our the given scope of action while a solution is developed that ultimately serves the client’s interests while being fully compliant with all the legal requirements. business success.”

GRAVEL EXTRACTION IN VIER- SITE DEVELOPMENT ALSO MEANS WALDSTÄTTERSEE ASBESTOS REMOVAL Central Switzerland – In Lake Lucerne, Central Switzerland – An industrial site stream gravel deposits near Beckenried in the Lucerne area is being repurposed. are mined at depths of up to 160 m be- In the process, a multi-storey production low the water level. Now the concession building will be partially dismantled. The is being newly awarded, and HOLINGER building, which dates from the 1930s, has prepared the application documents has a large number of components including environmental impact state- and installations containing asbestos. A Share of own services income ment, technical project and compensa- survey of the existing situation served ENVIRONMENTAL tory measures, for one of the bidders. HOLINGER as the basis for the renova- The resulting high-quality, comprehen- tion concept and the invitation to tender sive project features a well-balanced for the work. Professional supervision team that includes landscape architects and measurements will ensure the and water specialists. proper renovation of the property. 10%

Annual Report HOLINGER AG 2020 33 GEOLOGY CONSERVING RESOURCES MINIMISING RISK

Soil plays an critical role across a whole spectrum of projects ranging from construction, to the use of geothermal energy, to dealing with “We appreciate natural hazards. In Geology, we are committed to the careful use of and care for soil this important resource. because it is a In 2020, our dedicated Geology staff continued their involvement in projects of supra-regional scope. They worked on projects in the core disciplines of geology, scarce resource. By hydrogeology and geotechnics and contributed their environmental construction supervision and pedological construction supervision expertise to the environmentally understanding compatible execution of several comprehensive projects. subsoil properties we can better protect our groundwater.”

SUPPORT IN AVOIDING NATURAL SAFE BEDLOAD FILLING IN LAKE HAZARDS THUN Brig (VS) – The Matterhorn Gotthard Leissigen (BE) – Approximately 30 000 m3 Railway is exposed to a wide range of of excavated loamy gravel alluvial debris natural hazards. HOLINGER supports the was produced during the construction rail operators in the process of manag- of a bedload collector in the Griessbach. ing and mitigating the risks. The experts A large part of this will be dumped into have developed an integral risk manage- Lake Thun in the municipality of Leissi- ment system – from the development of gen. In cooperation with the fisheries Share of own services income basic principles to the management of inspectorate and the municipality, HOL- GEOLOGY protective structures and the formulation INGER specified a location that would of strategic goals. In the case of urgent minimise the risk of tidal waves resulting issues or events, HOLINGER prepares the from dumping in the shore area and that 1% decision-making tools for the responsi- would maximise occupational safety. ble parties.

34 “My top priority is to keep IT operations running smoothly and optimise them wherever possible. This challenging task motivates me on a daily basis.”

Fabiana Marzo, IT systems engineer HOLINGER AG, Liestal

Annual Report HOLINGER AG 2020 35 “The dynamic, diverse environment at HOLINGER gives me the opportunity to contribute my expertise and lead the administration into the future as an important hub for the branch.”

Claudia Scherrer, Administrative Director, HOLINGER AG, Liestal

36 ENERGY EXPERTISE EXPANDED ON THE WAY TO NET ZERO

In Energy we are making an active contribution to the decarbonisa- tion of the Swiss energy system with projects for the use of renewa- ble energies.

Lake water is a very promising resource for the heating and cooling of buildings. HOLINGER already has extensive experience with joint ventures or associations working in this field. New projects for extracting energy from river water are also in progress.

Other projects have involved showing various municipal utilities how they can increase the share of biogas in their networks. In addition, we advise companies within the framework of the Energy Agency for Industry and contribute expertise to projects in other business areas, particularly when it comes to using renewable energy in WWTPs.

We have further expanded our human resources and skill sets in Energy to actively contribute to a climate-neutral energy future.

‘SOLITUDE’ HEAT STATION Basel – In 2006, a pump station in the abutment of the Black Forest Bridge was taken out of service and will now be used as a heating plant. A feasibility study by HOLINGER has validated the project. The experts are currently working on the preliminary project for the heat pump station with a capacity of 12 MW. The plant is considered an

important pillar of CO2-neutral heat generation in Basel and implementation is planned for 2023/24.

Share of own services income USING LAKE WATER FOR COOLING MIDOR AG ENERGY Meilen (ZH) – The MIDOR AG factory generates a great deal of waste heat with a correspondingly high cooling requirement. HOLINGER has constructed a cooling 1% system that uses lake water via a pumping station and pipeline. Two pipes construct- ed by flush drilling carry cool water to the heat exchanger at MIDOR and return the warmed water back into the lake. The circuit has a maximum capacity of 360 m3 per hour and a maximum return temperature of 25°C.

Annual Report HOLINGER AG 2020 37 FACTS AND FIGURES

The HOLINGER Group consolidated financial statements were drawn up in accordance with Swiss GAAP FER guidelines for the second time in 2020. The balance sheet figures can there- fore be compared with those of the previous year for the first time. The HOLINGER Group's profit amounts to CHF 1.4 million with an equity of CHF 15.6 million.

The HOLINGER AG Annual General Meeting will take place on 1 September 2021. The meeting format is still open and will depend on epidemiological developments and the corresponding government guidelines. The Board of Directors proposes the distribution of a dividend of TCHF 850 and the distribution of capital contribution reserves of TCHF 367.

EQUITY AND SHARE VALUE GROWTH

80 16 000

70 14 000

60 12 000

50 10 000

40 8 000 Profit carried forward Allocation to statutory 30 6 000 reserves 20 4 000 Share capital Profit 10 2 000 Dividend Share value after any 0 0 dividend payment Share value 2019 2020 Equity [CHF] [TCHF]

38 INCOME STATEMENT

HOLINGER AG HOLINGER GROUP

2020 2019 2020 2019 [TCHF] [TCHF] [TCHF] [TCHF]

Net proceeds 54 343 51 827 62 671 61 048

Income from own services 49 398 46 508 57 976 55 549

Personnel costs 40 827 37 744 46 822 43 966

Other operating expenses 5 615 5 420 6 719 7 131

Cash flow 3 396 3 837 4 312 6 446

Profit for the year 923 2 080 1 415 2 516

The rounded figures are an extract from HOLINGER AG's full 2020 annual financial statement pursuant to Swiss GAAP FER guidelines. The consolidated financial statements were prepared in accordance with Swiss GAAP FER guidelines and were audited by BDO AG, Liestal on 23 March 2021 with no reservations or qualifications.

BALANCE SHEET · ASSETS HOLINGER AG HOLINGER GROUP

31/12/2020 31/12/2019 31/12/2020 31/12/2019 [TCHF] [TCHF] [TCHF] [TCHF]

Current assets 22 547 21 741 27 521 28 215

Non-current assets 16 547 16 185 16 544 15 499

Total assets 39 094 37 926 44 065 43 714

BALANCE SHEET · LIABILITIES HOLINGER AG HOLINGER GROUP

31/12/2020 31/12/2019 31/12/2020 31/12/2019 [TCHF] [TCHF] [TCHF] [TCHF]

Current financial liabilities 14 457 12 371 16 769 16 275

Non-current financial liabilities 11 347 11 361 11 709 11 643

Financial liabilities 25 804 23 732 28 478 27 918

Share capital 398 398 398 398

Statutory reserves 5 022 5 080 5 286 5 378

Equity 13 290 14 194 15 587 15 796

Total liabilities 39 094 37 926 44 065 43 714

Annual Report HOLINGER AG 2020 39 BALANCE SHEET · KEY FIGURES 2020

45

40 44.1

35 + 0.9 % + 3.2 % 39.1 30

25 % 28.5 % 27.5 2.2 % 25.8 20 2.5 + 8.7 – % 22.5 +

15 3.7 + % 15.6 10 % 1.3 % 13.3 23.5

25.0 %

+ – + 6.3 5 –

HOLINGER AG 2.1 2.5 HOLINGER GROUP 0 [Million CHF] Total assets Current assets Investments Financial Equity liabilities

TOTAL TURNOVER ORDER INTAKE

70 000

60 000

50 000

40 000

30 000

20 000

10 000

HOLINGER AG HOLINGER GROUP 0 [TCHF] 2018 2019 2020 2018 2019 2020

40 KEY FIGURES

HOLINGER AG HOLINGER GROUP

Number of employees 440 + 28 527 + 21

31/12/2020 Change compared 31/12/2020 Change compared [million CHF] to the previous year [million CHF] to the previous year

Turnover 54,3 + 4,8 % 62,7 + 2,8 %

Own services 49,4 + 6,2 % 58,0 + 4,5 %

Cash flow 3,4 – 10,5 % 4,3 – 32,8 %

Order intake 51,7 + 3,0 % 61,4 + 9,3 %

Order backlog 55,6 + 2,8 % 65,0 + 9,1 %

Investments 2,1 + 23,5 % 2,5 + 25,0 %

KEY FIGURES FOR EMPLOYEES

HOLINGER AG HOLINGER GROUP

2020 2019 2020 2019

Number of employees 440 412 527 506

Women 142 121 178 162

Tech university / Tech college 279 274 345 328

Tech school 29 14 41 29

Site manager, designer, draftsman 68 63 72 74

Commercial employee / IT 44 38 49 52

Apprentice 20 23 20 23

Staff turnover [%] 7,6 8,1 8,0 7,1

Training days (including in-house training for learners) 8,1 10,0 7,5 8,9

Average absence due to illness or accident 52,7 48,5 49,0 44,3 per employee [h]

Annual Report HOLINGER AG 2020 41 LOCATIONS

SWITZERLAND INTERNATIONAL HOLINGER AG HOLINGER International CH-5405 Baden Consultants GmbH CH-4052 Basel CH-4410 Liestal CH-3006 Berne CH-6863 Besazio (Mendrisio) HOLINGER Ingenieure GmbH CH-7000 Chur D-10117 Berlin CH-1024 Ecublens (Lausanne) D-09116 Chemnitz CH-8500 Frauenfeld D-01309 Dresden CH-5070 Frick D-20457 Hamburg CH-6331 Hünenberg (Zug) D-77756 Hausach CH-8700 Küsnacht (Zurich) D-79801 Hohentengen a. Hrh. CH-6403 Küssnacht (Schwyz) D-89188 Merklingen CH-4410 Liestal D-54296 Trier CH-6005 Lucerne CH-1920 Martigny HOLINGER AG Luxembourg CH-4601 Olten L-5485 Wormeldange-Haut CH-1950 Sion CH-8143 Stallikon WETZEL + PARTNER CH-3600 Thun Ingenieurgesellschaft mbH CH-8405 Winterthur D-47447 Moers CH-8005 Zurich

SUBSIDIARIES CONTACT aqua-System AG For all HOLINGER and subsidiary contact information CH-8405 Winterthur please visit our homepage: www.holinger.com

EnerSys Schweiz GmbH CH-4410 Liestal

ENVILAB AG CH-4800 Zofingen

IBG AG CH-8005 Zurich

SWISSWATER GmbH CH-8005 Zurich

TK Consult AG CH-8005 Zurich

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