Net Income per Common Share The computations of basic and diluted net income per common share for the three and nine months ended September 30, 2017 and 2016 were (in millions, except per share amounts): | | | | | | | | | | | | | | | | | | Three Months Ended September 30, | | Nine Months Ended September 30, | | 2017 | | 2016 | | 2017 | | 2016 | Net Income Available for Common Shares: | | | | | | | | Net income - Omnicom Group Inc. | $ | 263.6 |
| | $ | 253.8 |
| | $ | 834.0 |
| | $ | 798.3 |
| Net income allocated to participating securities | (0.3 | ) | | (1.2 | ) | | (1.4 | ) | | (4.8 | ) | | $ | 263.3 |
| | $ | 252.6 |
| | $ | 832.6 |
| | $ | 793.5 |
| Weighted Average Shares: | | | | | | | | Basic | 231.2 |
| | 237.4 |
| | 232.6 |
| | 238.4 |
| Dilutive stock options and restricted shares | 1.5 |
| | 1.3 |
| | 1.8 |
| | 1.2 |
| Diluted | 232.7 |
| | 238.7 |
| | 234.4 |
| | 239.6 |
| | | | | | | | | Anti-dilutive stock options and restricted shares | 1.0 |
| | — |
| | 1.0 |
| | — |
| Net Income per Common Share - Omnicom Group Inc.: | | | | | | | | Basic | $ | 1.14 |
| | $ | 1.06 |
| | $ | 3.58 |
| | $ | 3.33 |
| Diluted | $ | 1.13 |
| | $ | 1.06 |
| | $ | 3.55 |
| | $ | 3.31 |
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