Interim financial report in accordance with Section 37w of the German Securities Trading Act (WpHG)

Sto SE & Co. KGaA, Stühlingen Interim financial report in accordance with Section 37w of the German Securities Trading Act (WpHG) For the period from 1 January to 30 June 2017 Overview of the first half year of 2017 Consolidated turnover up by 6.6 % to EUR 617.5 million in the first half of the year Increase in domestic turnover by 5.4 % to EUR 266.8 million; turnover abroad grows by 7.6 % to EUR 350.7 million, partially also due to first-time consolidations Consolidated EBIT improves by 67.5 %, in a comparison of the half-year figures, to EUR 32.0 million, and earnings before taxes (EBT) increase by 74.7 % to EUR 31.1 million Slight decrease in the Group's workforce to 5,330 employees as compared to 5,340 employees at mid-year 2016 Outlook for the year 2017 as a whole unchanged: increase in turnover of 3 % to around EUR 1,268 million and EBIT of between EUR 80 million and EUR 90 million expected 1

Sto SE & Co. KGaA, Stühlingen Consolidated interim management report for the first half year of 2017 Business and general conditions The company Sto SE & Co. KGaA specialises in products and systems for building coatings and is one of the important global manufacturers in this sector. The product range is divided into four product groups: the core business of facade systems includes external wall insulation systems (EWIS), a segment in which our company occupies a leading position, and rainscreen cladding facade systems (RSC). In 2016, this product group accounted for 46.0 % of the total Group turnover. Facade coatings, which primarily include external render and paint systems, accounted for 24.7 % of the turnover, and products for interiors, such as plaster and paint systems optimised for home and office interiors, decorative coatings, interior claddings, and acoustic systems for regulating sound, reported a turnover share of 13.8 %. Furthermore, Sto produces and sells high-quality floor coatings and products for concrete repair which are attributed to Other product groups. There have been no changes to Sto's Group structure, management system, or strategy in the first half of 2017. They are described in detail in the 2016 Annual Report, which is available for download at www.sto.de in the section Investor Relations under Unternehmen (company). Alternatively, it can be requested from Sto SE & Co. KGaA. 2

Overview of business development in the first half year of 2017 and general statement by the Executive Board In the second quarter of 2017, Sto was able to continue the good business development which it had already experienced at the beginning to the year primarily due to favourable weather conditions, and improve consolidated turnover and earnings more significantly than anticipated. In a comparison of the half-year figures, the business volume rose by 6.6 % (EUR 38.4 million) to EUR 617.5 million. At EUR 32.0 million, the major part of the increase can be attributed organic growth - this equalled an increase of 5.5 % as compared to the same period in 2016. The Hesselberg Bygg group, which has been integrated into the consolidated annual financial statement of the Sto Group since 1 July 2016, contributed EUR 5.3 million between January and June 2017; currency translations had a positive effect of EUR 1.1 million. Especially the core business of facade systems, which had been heavily impacted by the contradictory and partially exaggerated discussions on the use of external wall insulation systems in Germany in the past few years, experienced a development that was better than anticipated. Furthermore, the sales activities to increase turnover in defined product groups, which had been initiated as part of the New Balance programme, showed first signs of success. Sto was also able to mainly record growth in other product groups as well. The increase in the business field of floor coatings, however, is solely attributable to the first-time consolidation of the Hesselberg Bygg group. In Germany, consolidated turnover rose by 5.4 % to EUR 266.8 million in the first two quarters of 2017; turnover abroad increased by 7.6 % to EUR 350.7 million. Without taking into account the Norwegian Hesselberg Bygg group, which was consolidated into the group for the first time, growth achieved outside of Germany equalled 6.0 %. In the first half year of 2017, consolidated earnings improved even more significantly than turnover. Compared to the weak reference period in 2016, earnings before 3

interest and taxes (EBIT) rose by 67.5 % to around EUR 32.0 million; earnings before taxes (EBT) increased by 74.7 % to EUR 31.1 million and net results in the Groups by 72.7 % to EUR 20.9 million. The New Balance programme, which aims at restoring a balance between turnover and cost increase in the Sto Group and at strengthening its profitability, consists of initiatives to increase turnover, activities to optimise costs, and personnel-related measures, which were largely specified in the reporting period. At the end of June, employer and employee representatives of Sto SE & Co. KGaA together decided on the parameters of the planned cost reductions in the personnel area, which mainly comprise the reduction of the workforce in Germany by 53 jobs, 28 of which at the main location in Stühlingen-Weizen. In return, a job guarantee until the end of 2018 was given to the more than 2,000 remaining employees in Germany provided that the conditions, agreed upon with the Works Council, are fulfilled. The cost effects for these personnel-related measures as part of a social plan had already been taken into account in the 2016 annual financial statements. Where 2017 as a whole is concerned, the Executive Board hence continues to believe that it will be possible to reach the announced targets set for turnover and earnings, and its forecasts remain unchanged. Economic conditions So far the global economy has experienced a positive development in 2017, despite numerous risks and uncertainties. According to the International Monetary Fund (IMF), growth in several large industrial countries as well as in many developing and newly industrialised countries was much stronger in the first three months than expected. The indicators for the second quarter are also mainly pointing upwards. However, the positive mood was dampened in Great Britain due to the unpredictable effects Brexit will have. In Germany, the adjusted gross domestic product (in German: Bruttoinlandsprodukt) increased by 0.6 % compared to the fourth quarter of 2016 according to estimates by the Federal Statistical Office. 4

International construction industry Worldwide the building industry has been able to generate growth in the course of 2017 so far; however, there have been significant differences from region to region. While economic growth has been on the upswing for many years in the USA, expenditure growth in building construction has recently started to slow down. The number of hotel, office and commercial constructions even increased in the doubledigit range at the beginning of the year. China also experienced growth in the area of building construction which was sustained by a continuing demand for residential properties. The sector benefited from building projects both started in 2016 and in the course of 2017 so far. From January to April, these expanded by 11.1 % on a volume basis in square metres. In other Asian countries, e.g. Singapore, the building sector experienced a marked decline in the reporting period. According to Eurostat estimates, production in the European building industry increased by 0.6 % in the first quarter of 2017 compared to the previous quarter, with building construction growing by 0.9 % and civil engineering by only 0.1 %. The positive trend continued throughout the month of April (+ 0.3 % compared to the month prior), while production presumably decreased by 0.7 % in May. The German construction industry also continued its growth course: According to the Hauptverband der Deutschen Bauindustrie (Central Association of the German Construction Industry), turnover in the main construction sector nominally exceeded the level of the same period last year by 10.7 % as at the end of May. Residential construction achieved an increase in turnover of 11.4 % as it still benefits from low interest rates, the lack of alternative investment opportunities, the solid labour market situation, and migration. Construction in the public sector increased by 11.9 % and commercial construction by 9.6 %. 5

Earnings, finance and asset situation of the Sto Group Consolidated turnover up by 6.6 % In the first six months of 2017, the consolidated turnover of Sto SE & Co. KGaA increased by 6.6 % to EUR 617.5 million (previous year: EUR 579.1 million). In addition to the organic growth of 5.5 %, the Group saw first-time consolidation effects of EUR 5.3 million through the Norwegian Hesselberg Bygg group which has been consolidated since mid-2016, and a positive effect of EUR 1.1 million from currency translations. In Germany, Sto SE & Co. KGaA achieved a Group-wide increase of 5.4 % to EUR 266.8 million in the reporting period (previous year: EUR 253.1 million), turnover abroad rose by 7.6 % to EUR 350.7 million (previous year: EUR 326.0 million). Without taking the Hesselberg Bygg group into consideration, foreign turnover was up 6.0 %. The share of Group turnover generated abroad amounted to 56.8 % in the reporting period compared to 56.3 % in the corresponding period in 2016. Turnover was also higher in July 2017 than in the same month of the previous year and hence slightly exceeded expectations. Turnover trend across the segments Turnover in the segment of Western Europe - including Germany - amounted to EUR 470.0 million at the end of June 2017 and was hence 5.4 % above the previous year's level of EUR 446.1 million. The subsidiaries in German and especially the Sto companies in Austria, Italy, and Sweden achieved pleasing growth, whereas the business volume in France remained at the previous year's level and hence below expectations. In the region of Northern/Eastern Europe, turnover increased by 13.1 % to EUR 69.9 million in the first half of 2017 (previous year: EUR 61.8 million). 6

Adjusted by the first-time consolidation effects from the Hesselberg Bygg group this equals a plus of 4.5 %. The development of business was particularly positive in the Northern European companies in the reporting period, while the volume in the region of Eastern Europe slightly declined due to major losses in Turkey, which is allocated to this segment. An increase of 9.0 % to EUR 77.6 million (previous year: EUR 71.2 million) was achieved in the segment of America/Asia, although demand within Asia continued to differ. In contrast, the companies in America were able to achieve pleasing growth, supported by positive currency translation effects. Consolidated earnings above previous year's value Over the course of the first six months of 2017, total revenues of the Sto Group rose in line with turnover by 6.6 % to EUR 622.3 million (previous year: EUR 583.8 million). In contrast, personnel expenses increased at an underproportional rate. Due to a slight decrease in the number of employees, personnel expenses rose only slightly by 1.9 % to EUR 170.8 million in comparison to the previous year (previous year: EUR 167.6 million). On the other hand, expenses for raw materials increased much more considerably than turnover: Due to the significant rise in raw material and procurement costs since the beginning of the year, which has not yet been compensated by a corresponding increase in sales prices, these expenses were 8.7 % above the previous year's level and amounted to EUR 279.2 million (previous year: EUR 256.9 million). At EUR -124.7 million, the balance of other operating income and other operating expenses remained unchanged. At EUR 15.6 million, depreciation/amortisation of intangible assets as well as property, plant and equipment also remained at approx. the previous year s level (previous year: EUR 15.5 million). In total, consolidated earnings before interest and taxes (EBIT) amounted to EUR 32.0 million (previous year: EUR 19.1 million) in the reporting period. 7

The financial result stood at EUR -0.9 million compared to EUR -1.3 million in the first half of the previous year. For the first six months of 2017, this resulted in earnings before taxes (EBT) of EUR 31.1 million (previous year: EUR 17.8 million). After taxes, net earnings improved from EUR 12.1 million to EUR 20.9 million. At the mid-point of 2017, the profit per limited preference share stood at EUR 3.30 (previous year: EUR 2.06) and at EUR 3.24 per limited ordinary share (previous year: EUR 2.00). Earnings trend across the segments As at the end of June 2017, EBIT in the Western Europe segment amounted to EUR 28.3 million after EUR 20.5 million the previous year. In the region of Northern/Eastern Europe, earnings improved from EUR -2.3 million to EUR 1.4 million in a comparison of the half-year figures, and in the America/Asia segment from EUR 0.9 million to EUR 2.9 million. Liquidity trend Due to the seasonal nature of the operating business, the Sto Group usually has a negative cash flow from operating activities in the first half of the year. In the reporting period, cash outflow amounted to a total of EUR 26.5 million as compared to EUR 22.5 million in the first half-year of 2016. The higher profit for the period was mainly offset by increased, additional commitment of funds in the net current assets. The commitment of funds, which was higher than in the previous year, mainly resulted from increased inventories for strategic reasons, increased trade receivables as well as the first-time consolidation effects from the Hesselberg Bygg group. Cash flow from investment activities stood at EUR 18.3 million (previous year: EUR 5.4 million) after six months. Outflows relating to investments in property, plant and equipment as well as intangible assets slightly decreased from EUR 13.7 million to EUR 11.2 million. Furthermore, the disbursements of EUR 9.1 million posted in the previous year were attributable to the acquisition of companies. The Group received EUR 43.9 million (previous year: EUR 27.5 million) by the end of June by releasing 8

financial investments; EUR 15.0 million went into new financial investments (previous year: EUR 0 million). From the cash flow from financing activities, which amounted to a total of EUR -19.4 million at the 2017 mid-year point (previous year: EUR -3.9 million), EUR 21.0 million (previous year: EUR 31.1 million) were allocated to the dividend distribution to our shareholders. Deposits from current borrowings, which had amounted to EUR 27.5 million the previous year, decreased to EUR 2.0 million. Taking into account changes to the tune of EUR -1.1 million (previous year: EUR -0.7 million) due to the exchange rate, financial resources on 30 June 2017 came to EUR 41.3 million (previous year: EUR 49.1 million). For seasonal reasons, cash and cash equivalents dropped by EUR 28.7 million compared to year-end 2016 (previous year: EUR 21.8 million). Slight decrease in investments During the first six months of 2017, the Sto Group s investments in property, plant and equipment as well as intangible assets amounted to EUR 11.2 million and hence remained under the previous year's value of EUR 13.6 million. A large share of this amount is accounted for by the subsidiary Verotec GmbH, which is almost doubling its production capacity at its facility in Lauingen in order to accommodate the growing demand for lightweight construction boards. The construction measures will be completed in 2017. Furthermore, Sto invested in replacement and extension projects to the usual extent. Sound asset situation On the reference date of 30 June 2017, Sto SE & Co. KGaA s consolidated balance sheet had improved to EUR 744.4 million (31 December 2016: EUR 714.2 million). This increase of 4.2 % (EUR 30.2 million) as compared to the 2016 year-end mainly resulted from the seasonal nature of the business activities. 9

On the assets side, current assets rose by EUR 37.5 million to EUR 423.3 million; the increases in inventories from EUR 92.5 million to EUR 108.4 million and in current trade receivables from EUR 122.5 million to EUR 203.4 million, were particularly notable in this respect. As a result of seasonally higher financial requirements for operating activities, current financial assets in the Sto Group fell by EUR 31.2 million to EUR 41.4 million as at the end of June, while cash and cash equivalents fell by EUR 28.8 million to EUR 41.3 million. In total, non-current assets decreased by EUR 7.3 million to EUR 321.1 million. On the reference date, EUR 253.0 million of this amount was attributable to property, plant and equipment (31 December 2016: EUR 258.5 million) and EUR 48.9 million to intangible assets (31 December 2016: EUR 49.8 million). On the liabilities side, equity capital in the Sto Group amounted to a total of EUR 420.8 million as at 30 June 2017 and hence remained EUR 4.4 million under the value at year-end 2016 due to lower revenue reserves. The equity ratio stood at a solid 56.5 % on the reference date as compared to 59.5 % on 31 December 2016. Non-current provisions and liabilities rose by EUR 0.6 million to EUR 111.1 million during the first six months of 2017. Post-employment benefit provisions increased slightly by EUR 1.1 million to EUR 94.3 million. For seasonal reasons, current provisions and liabilities rose by EUR 34.0 million to EUR 212.5 million. Trade payables in the Sto Group increased by EUR 18.4 million to EUR 64.8 million and other current liabilities by EUR 25.2 million to EUR 68.6 million, while non-current financial liabilities were reduced by EUR 16.2 million to EUR 11.6 million. Current and non-current borrowings for the Sto Group amounted to EUR 16.6 million on the reference date (31 December 2016: EUR 14.6 million). Taking into account cash and cash equivalents at the mid-year point, this resulted in net financial assets of EUR 24.7 million (31 December 2016: EUR 55.5 million). 10

Employees Slight decrease in the number of employees in comparison to the previous year At the end of June 2017, the Sto Group had 5,330 employees worldwide as compared to 5,340 on the same day of the previous year (-10 employees; -0.2 %) and 5,251 at the 2016 year-end (+79 employees; +1.5 %). In Germany, the number of employees has decreased by 33 to 2,863 (previous year: 2,896) since mid-2016. The number of people employed by Sto abroad rose from 2,444 to 2,467 in comparison to the previous year, of which 32 people were working at Hesselberg Bygg. Without the first-time consolidation, this resulted in a light decrease in the number of employees outside of Germany as well. This was due to the specific adjustment measures in regions with difficult general economic conditions. These measures were contrasted with targeted new appointments in countries with medium-term growth prospects. As at the end of June, the percentage of the Group s workforce employed abroad had increased from 45.8 % to 46.3 %. As at 30 June 2017, Sto had a total of 4,064 employees in Western Europe (including Germany), 664 in the segment of Northern/Eastern Europe, and 602 in America/Asia. Risk report The structure of the risk management and internal control system (ICS) and the risks to which the Sto Group is exposed which remain unchanged are described in detail in the 2016 Group management report. At present, no appreciable risks are apparent that could have a permanent and significant adverse effect on the earnings situation, the financial position, or the asset situation of the Sto Group. 11

Outlook report Global economy In July, the IMF confirmed its forecast for the development of the global economy in the year 2017 as a whole: In its update on the economic situation, the experts continue to expect global growth of 3.5 %. Gross domestic product in industrialised countries is expected to rise by 2.0 %, while the outlook for the USA and Great Britain has moderately deteriorated. The prospects for the German economy, on the other hand, were slightly raised by 1.8 %. A total plus of 4.6 % is anticipated for developing and newly industrialised countries. The IMF lists the unclear consequences of the Brexit negotiations and the development in the USA, which is difficult to predict, as two of the worldwide risks that could have an impact on the economic upswing. Other factors are the uncertain development on the financial markets, growing geopolitical tensions, as well as increasing protectionism. International construction industry According to GTAI estimates, the US construction industry should continue to experience an upswing in the further course of 2017 despite the weaker traction gained in getting building projects off the ground. The GTAI expects expenditure to rise by 5 % in 2017. The principal driver of the industry s development is likely to remain the growth in building construction, generated in equal parts by residential and nonresidential constructions. From today's point of view, the positive trend in China so far is set to continue as the year progresses. This trend is likely to slightly weaken due to expected damping measures by the state which are to curb the increase in housing prices caused by speculations. 12

In Europe, EUROCONSTRUCT is forecasting a virtually unchanged rise in volume of construction compared with 2016, amounting to 2.1 %. This is mainly attributable to the economic revival in several European countries, the backlog of demands that has built up in many regions, improvements in public financial conditions, low interest rates, as well as sustained immigration and internal migration. In Germany, the economic development in the construction sector has been better than expected in the course of the year to date, which caused the Hauptverband der Deutschen Bauindustrie (Central Association of the German Construction Industry) to adjust its forecast for the sector's turnover in 2017 from 5 % to 6 %. With an expected increase in turnover of around 7.5 %, the construction of new buildings hence remains the driving force for the economic development in the sector. Turnover in public construction is forecast to grow by 6 % and by 4 % in commercial construction. Sto: outlook unchanged for 2017 as a whole The uncertainty regarding the use of external wall insulation systems, which can still be felt especially among private investors, was reinforced by the catastrophic fire in London, although neither an external wall insulation system nor polystyrene had been installed on the facade of Grenfell Tower. The fire triggered an international discussion on the insulation of buildings - a discussion which still takes place in the media and in politics. Potential effects on the further business development of the Sto Group are currently difficult to forecast. From a technical viewpoint, EWIS continue to have a high sales potential due to the objective advantages that energy-efficient facade insulation offers. Thus we still expect a slight increase in business volume and additional expansion of our market share in this product area although the impact the current discussion will have cannot be predicted in a reliable manner. The Sto systems meet the high demands on insulating performance, ecology, cost-effectiveness, durability, fire protection, and design freedom. Politicians are also aware that an energy revolution is not possible without more energy efficiency in new as well as in existing buildings. We also see potential 13

for growth in other product areas of the Sto Group and, for example, expect increases in the product ranges for interiors, acoustic systems, and facade coatings. For the year of 2017 as a whole, the Sto Group continues to expect a growth in turnover of 3 % to around EUR 1,268 million (previous year: EUR 1,230.7 million). As things stand, consolidated earnings before interest and taxes (EBIT) are also likely to rise, ultimately amounting to between EUR 80 million and EUR 90 million (previous year: EUR 70.3 million). Effects from the measures of the New Balance programme will also contribute to this. Earnings before taxes (EBT) are expected to reach between EUR 78 million and EUR 88 million (previous year: EUR 68.1 million). Where the resulting return on sales is concerned, we are likely to see a value between 6.2 % and 6.9 % (previous year: 5.5 %). However, the weather conditions, which have a large impact on the company's turnover and earnings trends, cannot be forecast in a reliable manner. The ROCE (Return on Capital Employed) figure is expected to be between 15.8 % and 17.8 % in 2017 (previous year: 13.9 %). Stühlingen, August 2017 Sto SE & Co. KGaA represented by STO Management SE The Executive Board 14

Sto SE & Co. KGaA, Stühlingen Condensed consolidated statement of profit and loss For the period from 01 January to 30 June 2017 30 June 2017 30 June 2016 EUR EUR 1. Revenues 617.508.855,49 579.111 2. Changes in product inventories 4.778.623,00 4.712 3. Other internally generated assets capitalised 16.148,84 0 Total revenues 622.303.627,33 583.823 4. Other operating income 7.027.971,00 6.391 5. Cost of materials -279.184.061,49-256.910 6. Personnel expenditure -170.840.133,86-167.645 7. Other operating expenses -131.730.258,16-131.059 EBITDA 47.577.144,82 34.600 8. Depreciation and amortisation of intangible assets as well as property, plant and equipment -15.582.850,16-15.526 EBIT (earnings before interest and taxes) 31.994.294,66 19.074 9. Net financial income/expense -880.439,01-1.280 EBT (earnings before taxes) 31.113.855,65 17.794 10. Taxes on income and earnings -10.174.230,80-5.676 EAT (earnings after taxes) 20.939.624,85 12.117 of which: Share of minority interests -10.996,84-866 Share attributable to the shareholders of Sto SE & Co. KGaA 20.950.621,69 12.983 Earnings per share basic/diluted in EUR Ordinary share 3,24 2,00 Preference share 3,30 2,06 15

Sto SE & Co. KGaA, Stühlingen Consolidated statement of recognised income and expenses For the period from 01 January to 30 June 2017 30 June 2017 30 June 2016 EUR EUR K EAT (earnings after taxes) 20.939.624,85 12.117 Currency translation Currency translation differences -4.339.943,99-1.031 Deferred taxes 0,00 0 Currency translation differences after taxes -4.339.943,99-1.031 Earnings to be reclassified in the statement of profit and loss in future periods -4.339.943,99-1.031 Actuarial gains or losses Actuarial gains or losses 0,00-15.049 Deferred taxes 0,00 4.319 Earnings not to be reclassified in the statement of profit and loss in future periods 0,00-10.730 Other earnings (after taxes) -4.339.943,99-11.761 Overall earnings after taxes 16.599.680,86 357 of which: Share of minority interests -10.996,84-910 Share attributable to the shareholders of Sto SE & Co. KGaA 16.610.677,70 1.266 16

Sto SE & Co. KGaA, Stühlingen Consolidated statement of financial position as at 30 June 2017 ASSETS 30 June 2017 31 Dec 2016 LIABILITIES 30 June 2017 31 Dec 2016 EUR EUR K EUR EUR K A. NON-CURRENT ASSETS A. EQUITY CAPITAL I. Intangible assets 48.863.174,96 49.823 I. Subscribed capital 17.556.480,00 17.556 II. Property, plant and equipment 253.014.971,50 258.486 II. Capital reserves 57.803.590,41 57.804 III. Financial assets accounted for using the equity method 0,00 0 III. Revenue reserves and other reserves 338.062.212,44 342.488 Fixed assets 301.878.146,46 308.309 Share attributable to the shareholders of Sto SE & Co. KGaA 413.422.282,85 417.848 IV. Non-current trade receivables 1.100.969,42 1.209 IV. Share of minority interests 7.360.919,74 7.372 V. Non-current income tax receivables 0,00 126 TOTAL EQUITY CAPITAL 420.783.202,59 425.220 VI. Non-current financial assets 438.467,64 393 VII. Other non-current assets 287.897,16 1.068 B. NON-CURRENT PROVISIONS AND LIABILITIES VIII. Deferred tax assets 17.397.869,95 17.277 I. Provisions for post-employment benefits and similar liabilities 94.309.214,10 93.231 Other non-current assets 19.225.204,17 20.073 II. Deferred tax liabilities 2.049.565,02 2.070 TOTAL NON-CURRENT ASSETS 321.103.350,63 328.382 III. Other non-current provisions 13.042.892,67 13.284 IV. Non-current borrowings 998.628,84 1.121 B. CURRENT ASSETS V. Non-current financial liabilities 746.841,88 741 I. Inventories 108.408.794,15 92.541 VI. Other non-current liabilities 1.113,77 28 II. Current trade receivables 203.425.913,12 122.465 TOTAL NON-CURRENT PROVISIONS AND LIABILITIES 111.148.256,28 110.475 III. Current income tax receivables 5.582.719,57 6.208 IV. Current financial assets 41.411.099,81 72.575 C. CURRENT PROVISIONS AND LIABILITIES V. Other current assets 23.101.993,55 21.974 I. Other current provisions 47.834.678,98 44.386 VI. Cash and cash equivalents 41.343.459,76 70.070 II. Current borrowings 15.575.545,89 13.498 TOTAL CURRENT ASSETS 423.273.979,96 385.833 III. Trade payables 64.793.855,84 46.446 IV. Current income tax liabilities 4.146.285,43 3.004 V. Current financial liabilities 11.555.912,12 27.788 VI Other current liabilities 68.539.593,46 43.398 TOTAL CURRENT PROVISIONS AND LIABILITIES 212.445.871,72 178.520 TOTAL DEBT CAPITAL 323.594.128,00 288.995 Total assets 744.377.330,59 714.215 Total assets 744.377.330,59 714.215 17

Sto SE & Co. KGaA, Stühlingen Statement of changes in equity as at 30 June 2017 in EUR K Subscribed capital Capital reserves Equity attributable to the shares of the parent company Revenue reserves Currency translation reserve Reserve for pensions Provision for cash flow hedges Treasury stock Total Share of minority interests Total equity capital Status as at 01 January 2016 17.556 57.804 365.454 10.831-24.634 0-23.055 403.956 744 404.700 EAT (earnings after taxes) 0 0 12.983 0 0 0 0 12.983-866 12.117 Other earnings (after taxes) 0 0 0-1.031-10.686 0 0-11.717-44 -11.762 Income and expenses recognised 0 0 12.983-1.031-10.686 0 0 1.265-910 356 Dividend payout 0 0-31.061 0 0 0 0-31.061 0-31.061 Deposit by associates 0 0 0 0 0 0 0 0 0 0 Minority shares from corporate acquisition 0 0 0 0 0 0 0 0 7.102 7.102 Status as at 30 June 2016 17.556 57.804 347.376 9.800-35.321 0-23.055 374.160 6.936 381.096 Status as at 01 January 2017 17.556 57.804 380.402 11.521-26.380 0-23.055 417.848 7.373 425.220 EAT (earnings after tax) 0 0 20.951 0 0 0 0 20.951-11 20.940 Other earnings (after tax) 0 0 0-4.340 0 0 0-4.340 0-4.340 Income and expenses recognised 0 0 20.951-4.340 0 0 0 16.611-11 16.600 Dividend payout 0 0-21.037 0 0 0 0-21.037 0-21.037 Deposit by associates 0 0 0 0 0 0 0 0 0 0 Status as at 30 June 2017 17.556 57.804 380.316 7.181-26.380 0-23.055 413.422 7.362 420.783 18

Sto SE & Co. KGaA, Stühlingen Consolidated cash flow statement For the period from 1 January to 30 June 2017 30 June 2017 30 June 2016 EUR K EUR K 1. Cash flow from operating activities Accounting profit 31.114 17.794 Depreciation of non-current assets 15.583 15.526 Net profit/loss from disposal of non-current assets -211-164 Net profit/loss from measurement at equity 0 349 Net interest income/expense and other net finance income/expense 880 932 Income taxes paid -8.581-9.946 Change in provisions 4.285 4.484 Change in net current assets -69.580-51.518 Cash flow from operating activities -26.510-22.543 2. Cash flow from investment activities Investment in property, plant and equipment, and intangible assets -11.161-13.646 Disbursements for capital increase in joint ventures 0-349 Payments for the acquisition of consolidated companies and other business units (less acquired cash and cash equivalents) 0-9.120 Payments received from the disposal of intangible assets and property, plant and equipment 296 741 Interest payment received 241 245 Disbursements for financial investments -15.000 0 Deposits from financial investments 43.928 27.539 Cash flow from investment activities 18.304 5.410 3. Cash flow from financing activities Payments for the acquisition of minority interests 0 0 Taking out of non-current borrowings 0 500 Payments for non-current borrowings -52-154 Payments for current borrowings 0-287 Payments received for current borrowings 2.007 27.405 Dividend distribution -21.037-31.061 Deposits by associates 0 0 Interest payments -361-317 Cash flow from financing activities -19.443-3.914 Change in cash and cash equivalents from changes in exchange rates -1.079-738 Opening balance of cash and cash equivalents 70.071 70.862 Change in cash and cash equivalents -28.728-21.785 Closing balance of cash and cash equivalents* 41.343 49.077 *Closing cash and cash equivalents equal the item 'Cash and cash equivalents' in the balance sheet. 19

Sto SE & Co. KGaA, Stühlingen Consolidated segment reporting For the period from 01 January to 30 June 2017 Information on geographic segments by sales markets (EUR K) Preiod from 01 January to 30 June 2017 Western Europe Northern / Eastern Europe Other Transitional / consolidation entries America / Asia Group External revenues 469.990 69.934 77.585 0 617.509 Inter-segment revenues 19.302 464 16-19.782 0 Segment revenues 489.292 70.398 77.601-19.782 617.509 EBITDA 40.782 2.774 4.555-534 47.577 Depreciation/amortisation 12.489 1.411 1.683 0 15.583 EBIT (earnings before interest and taxes) 28.293 1.363 2.872-534 31.994 EBT (earnings before taxes) 27.253 1.334 3.060-534 31.114 Investments 9.672 524 965 0 11.161 Staff on balance sheet date 4.064 664 602 0 5.330 For the period from 01 January to 30 June 2016 Western Europe Northern / Eastern Europe Other Transitional / consolidation entries America / Asia Group External revenues 446.111 61.761 71.239 0 579.111 Inter-segment revenues 17.714 201 1-17.915 0 Segment revenues 463.825 61.961 71.240-17.915 579.111 EBITDA 32.979-919 2.581-42 34.600 Depreciation/amortisation 12.513 1.353 1.660 0 15.526 EBIT (earnings before interest and taxes) 20.466-2.272 921-42 19.074 EBT (earnings before taxes) 18.942-2.253 1.147-42 17.794 Investments 10.564 698 2.384 0 13.646 Staff on balance sheet date 4.096 641 603 0 5.340 20

Sto SE & Co. KGaA, Stühlingen Notes to the condensed consolidated interim financial statement for the period from 1 January to 30 June 2017 1. Basis of preparation Sto SE & Co. KGaA prepared its consolidated financial statement for the 2016 fiscal year in accordance with the International Financial Reporting Standards (IFRS) as applicable in the European Union and the interpretations issued by the International Financial Reporting Interpretations Committee (IFRIC). Accordingly, this interim financial statement as at 30 June 2017 has also been prepared in accordance with the International Accounting Standard 34 'Interim Financial Reporting' as a condensed interim report. The condensed consolidated interim financial statement does not encompass all of the information and details required for consolidated financial statements and should therefore be assessed in conjunction with the consolidated financial statement as at 31 December 2016. The consolidated interim financial statement has not been subjected to audit. On 28 August 2017, the personally liable partner STO Management SE released the statement for publication. 2. Accounting and measurement principles In order to draw up the condensed consolidated interim financial statement, the accounting methods applicable until 31 December 2016 for the consolidated annual financial statement, with the exception of the standards and interpretations that became applicable on 1 January 2017, were adopted unchanged. A detailed description of these accounting methods was published in the Notes to the 2016 consolidated financial statement. The accounting regulations that became mandatory to apply for the first time in the fiscal year of 2017 have no appreciable impact on the presentation of the asset situation, financial position or earnings situation in the consolidated interim financial statement. In the consolidated interim financial statement, discount rates for post-employment benefit provisions of between 1.95 % and 2.35 % (31 December 2016: 1.95 % to 2.35 %) were used for associates with the Euro as their functional currency. The adjustment of the post-employment benefit provision took into account the actuarial sensitivity as at 31 December 2016. For associates with a different functional currency, the discount rate is set at 0.6 % (31 December 2016: 0.6 %). Income tax expense was calculated in accordance with IAS 34 'Interim Financial Reporting' on the basis of the anticipated effective tax rate for the entire fiscal year. 21

3. Companies consolidated The consolidated financial statement includes Sto SE & Co. KGaA as well as the domestic and nondomestic subsidiaries on which Sto SE & Co. KGaA is able to exercise a controlling influence as defined in IFRS 10. Control as defined in IFRS 10 exists when an investor has exposure or rights to variable returns from its involvement with the investee and has the ability to affect those returns through power over an investee. No significant evaluations or assumptions were necessary when evaluating the companies consolidated, the joint control or the type of joint control because the allocation was clear in the Sto Group without them. In case of companies where less than 50 % of capital shares are held and which are nevertheless fully consolidated, control is assured via further contractual agreements. 4. Seasonal influences on business activities Owing to the seasonal fluctuations in the construction industry, a higher EBIT (earnings from operating activities) than that achieved in the first half of the year is normally expected in the second half of the year. The generally higher turnover from May to October as compared to the months of November to April is essentially due to better weather conditions. 5. Earnings per share / Distributed dividends Basic earnings per limited ordinary and per limited preference share are calculated by dividing the proportion of earnings attributable to Sto SE & Co. KGaA's limited ordinary or limited preference shareholders by the weighted average number of limited ordinary and limited preference shares in circulation during the fiscal year. In addition to the issued shares, potential shares (e.g. from options) also have to be taken into account when determining diluted earnings per share. As at 30 June 2017, there were no potential shares, as was the case on 30 June 2016. Hence basic and diluted earnings per share were identical in both years. In the first half of 2017, a dividend of EUR 0.25 as well as an extra dividend of EUR 3.00 per limited ordinary share, and a dividend of EUR 0.31 as well as an extra dividend of EUR 3.00 per limited preference share, were distributed for the 2016 fiscal year. This corresponds to a total dividend payout amount of EUR 21,037 K. The distribution of dividends occurred on 19 June 2017 in accordance with the resolution of the Annual General Meeting of 14 June 2017. 6. Intangible assets and property, plant and equipment In the period from 1 January to 30 June 2017, the Sto Group acquired assets at acquisition costs of EUR 11,161 K (first half of 2016: EUR 13,646 K). In the same period, the Group sold assets with a carrying amount of EUR 126 K (first half of 2016: EUR 605 K). 22

7. Information on fair value The principles and methods for measurements at fair value remain unchanged from the previous year. The financial assets and liabilities accounted for at fair value are structured according to the following valuation categories: Level 1 Financial instruments traded in active markets, the listed prices of which were adopted unchanged for measurement purposes. Level 2 The measurement is made on the basis of valuation methods in which the influential factors are derived either directly or indirectly from observable market data. The derivatives are currency hedges only. They are measured based on the observable exchange rates, the interest structure curves of the currencies as well as the basic spreads between the currencies. Level 3 The measurement is effected using valuation methods where the influential factors are not based exclusively on observable market data. During the reporting period there were no reclassifications of measurements at fair value between the levels. Assets and liabilities accounted for at fair value with an impact on profit and loss exclusively comprise derivative financial instruments or currency forwards, which are not included in any hedge accounting. 23

The following table shows carrying amounts and fair values of financial instruments as at 30 June 2017: The carrying amounts of cash and cash equivalents, receivables and liabilities from deliveries and services correspond mainly to the fair values due to the short terms. Interest rates have virtually remained unchanged during the last half year. 24

The following table contains an overview of the balance sheet items accounted for at fair value: 8. Contingencies and contingent liabilities As at 30 June 2017, liabilities for the acquisition of property, plant and equipment stood at EUR 3,442 K (30 June 2016: EUR 14,177 K). Other contingencies and contingent liabilities contained in the 2016 consolidated financial statement showed no appreciable changes as at 30 June 2017. 25

9. Related party disclosures The volume of deliveries and services in the first half year between associates of the Sto Group and related parties are set out in the following table: 10. Events after the end of the reporting period After the end of the reporting period, a court litigation proceeding regarding warranty claims against a liability insurer was resolved as part of a settlement. An extraordinary income of USD 4.3 million (around EUR 3.9 million) resulted from this proceeding. Between the end of the reporting period and the point at which this report was signed off, there were no other events of particular note or with a significant impact on the earnings situation, the financial position, or the asset situation of the Sto Group. 26

Responsibility statement by the legal representatives We confirm that to the best of our knowledge, the interim consolidated financial statement in accordance with the applicable accounting principles for interim reporting provides a true and fair view of the net assets, financial position and earnings situation of the Group in compliance with generally accepted accounting principles, and that the consolidated interim management report presents a true and fair view of business development, including the operating results and position of the Group, and that the principal opportunities and risks associated with the anticipated development of the Group throughout the remaining months of the 2017 fiscal year are sufficiently described. Stühlingen, 28 August 2017 Sto SE & Co. KGaA represented by STO Management SE Executive Board Rainer Hüttenberger Michael Keller Jan Nissen Rolf Wöhrle (Spokesman) 27