ADTRAN Holdings, Inc. 8-K

What Happened

• On February 25, 2026, ADTRAN Holdings, Inc. announced its financial results for the quarter and fiscal year ended December 31, 2025. The company attached its press release as Exhibit 99.1 to the Form 8-K.
• ADTRAN executives will review the results via a live audio webcast on February 26, 2026 at 7:30 a.m. Central Time (2:30 p.m. Central European Time). An investor presentation used in that review is attached as Exhibit 99.2, and an archived recording will be available on ADTRAN’s Investor Relations page for a limited time.

Key Details

• Announcement date: February 25, 2026 (Form 8-K filed February 26, 2026).
• Press release with results: Exhibit 99.1 to the 8-K.
• Webcast: February 26, 2026 at 7:30 a.m. CT / 2:30 p.m. CET; investor presentation: Exhibit 99.2.
• Legal note: Information in Items 2.02 and 7.01 is being furnished (not “filed”) under the Exchange Act.

Why It Matters

• This filing notifies investors that ADTRAN has released its quarterly and full-year 2025 earnings information and will provide management commentary via a public webcast—key sources for revenue, earnings, guidance, and operational context.
• Retail investors should review the attached press release and the investor presentation or listen to the webcast to see reported revenue, profit/loss, and any guidance or management remarks that could affect the stock. The “furnished, not filed” status affects how the information may be used in certain legal contexts but does not change its importance for evaluating the company’s recent results.