Exhibit 99.1 TTEC Announces First Quarter 2026 Financial Results and Reiterates Outlook for Full Year 2026 AUSTIN, Texas, May 7, 2026 – TTEC Holdings, Inc. (NASDAQ:TTEC), a leading global technology, consulting and managed services company focused on delivering solutions at the intersection of data, AI and customer experience, announced today financial results for the first quarter ended March 31, 2026. · First quarter 2026 GAAP revenue was $496.2 million, a 7.1 percent decrease compared to $534.2 million i ...