EXHIBIT 99.1 CDW Reports First Quarter 2026 Earnings | Three Months Ended March 31, | | | | | | | --- | --- | --- | --- | --- | --- | | (Dollars in millions, except per share amounts) 2025 | | 2026 | | | Percent Change | | Net sales | $| 5,679.8 |$ | 5,199.1 | 9.2 % | | Gross profit | $| 1,190.0 |$ | 1,122.3 | 6.0 | | Gross profit margin | | 21.0 % | | 21.6 % | | | Operating income | $| 376.0 |$ | 361.4 | 4.0 | | Operating income margin | | 6.6 % | | 7.0 % | | | 1 Non-GAAP operating income | $ | 451.9 ...