in CHF mn Notes % 2017 % 2018 Change in %
Net sales 1, 2  100.0 6,248.3  100.0 7,085.4  13.4
Material expenses 3 -45.6 -2,849.2 -47.0 -3,333.7  
Gross result    54.4 3,399.1  53.0 3,751.7  10.4
Personnel expenses 4 -19.4 -1,212.1 -19.0 -1,345.4  
Other operating expenses 5 -17.9 -1,118.5 -17.7 -1,256.4  
Operating profit before depreciation    17.1 1,068.5  16.3 1,149.9  7.6
Depreciation and amortization expenses 2, 15, 16 -2.8 -172.2 -2.9 -204.0  
Operating profit 2  14.3  896.3  13.4  945.9  5.5
Interest income 7  0.0  1.9  0.0  1.9  
Interest expenses 6 -0.3 -18.3 -0.4 -26.1  
Other financial income 7  0.2  5.9  0.1  5.8  
Other financial expenses 6 -0.4 -24.0 -0.5 -35.2  
Income from associated companies 7  0.0  0.3  0.0  0.6  
Profit before taxes    13.8  862.1  12.6  892.9  3.6
Income taxes 8 -3.4 -213.1 -2.9 -205.8  
             
Net profit    10.4  649.0  9.7  687.1  5.9
    Profit attributable to Sika shareholders    10.3  643.5  9.6  682.9  
    Profit attributable to non-controlling interests 24  0.1  5.5  0.1  4.2  
             
Undiluted earnings per share (in CHF)1 9   4.23   4.69 10.9
Diluted earnings per share (in CHF)1,2 9   4.23   4.58 8.3

1 Due to the share split, the earnings per share as of December 31, 2017, were adjusted for comparability. Our calculation took this into account with 1/60 of the earnings per share as of December 31, 2017. For details see note 24.

2 Dilutive effect due to convertible bonds issued (see note 20).

Consolidated statement of profit and loss and other comprehensive income

in CHF mn Notes % 2017 % 2018 Change in %
Net profit    10.4  649.0  9.7  687.1  5.9
Actuarial gains (+)/losses (-) on employee benefit obligations 22  1.0  63.9 -0.4 -30.0  
Income tax effect 8 -0.2 -11.6  0.1  5.3  
Items that will not be reclassified to profit or loss    0.8  52.3 -0.3 -24.7  
Exchange differences taken to equity    0.1  5.8 -1.1 -76.6  
Items that may be reclassified subsequently to profit or loss    0.1  5.8 -1.1 -76.6  
Other comprehensive income    0.9  58.1 -1.4 -101.3  
Comprehensive income    11.3  707.1  8.3  585.8 -17.2
    Attributable to Sika shareholders    11.2  702.1  8.2  581.4  
    Attributable to non-controlling interests 24  0.1  5.0  0.1  4.4