ADTRAN Holdings, Inc. 8-K

What Happened

• ADTRAN Holdings, Inc. announced its financial results for the first quarter ended March 31, 2026 in a press release dated May 4, 2026 (Item 2.02). The company furnished — but did not “file” — the press release and related investor materials in an 8-K.
• Company executives reviewed the results in a live audio webcast on May 5, 2026 at 7:30 a.m. Central Time (2:30 p.m. Central European Time); an investor presentation used for that review was also furnished (Item 7.01).

Key Details

• Press release announcing Q1 2026 results: Exhibit 99.1 (furnished May 4, 2026).
• Investor presentation for the May 5 webcast: Exhibit 99.2 (furnished May 5, 2026).
• Quarter covered: period ended March 31, 2026.
• The 8-K was signed May 5, 2026 by Timothy Santo, Senior VP Finance and CFO.
• The filing notes the furnished materials are not “filed” under Section 18 of the Exchange Act and are not incorporated by reference into other filings unless expressly stated.

Why It Matters

• This 8-K provides investors with ADTRAN’s first public disclosure of its quarterly performance for Q1 2026 and access to management commentary via the webcast and slides. Review the attached press release and presentation for revenue, earnings, and other financial metrics — the 8-K itself references those materials rather than repeating detailed figures.
• The legal note that materials are “furnished” (not “filed”) affects how the information can be used in future SEC filings and limits certain liabilities; investors should rely on the press release and presentation for the substance of the quarterly results.