secwatch / observer

ADTRAN Holdings, Inc. — fact timeline

Source-grounded facts extracted from ADTRAN Holdings, Inc.'s SEC 8-K filings across all families, newest first. Each cites a verbatim SEC excerpt.

ADTN ADTRAN Holdings, Inc. JSON
Governance Changes

ADTRAN Holdings, Inc.: Stockholders approved an amendment to the Amended and Restated Certificate of Incorporation to limit the liability of certain officers as permitted by Delaware law and make certain other changes to Section 7.1, effective upon filing with the Delaware Secretary of State on May 13, 2026 (effective 2026-05-13).

“At the Annual Meeting of Stockholders held by ADTRAN Holdings, Inc. (the “Company”) on May 13, 2026 (the “2026 Annual Meeting”), the Company’s stockholders approved an amendment (the “Charter Amendment”) to the Company’s Amended and Restated Certificate of Incorporation (the “Charter”).”
Earnings Releases

ADTRAN Holdings, Inc. reported the first quarter ended March 31, 2026 results: revenue $286.1 million, EPS GAAP diluted loss per share of $0.01; non-GAAP diluted earnings per share of $0.14. Guidance initiated.

“(NASDAQ: ADTN and FSE: QH9) (“ADTRAN Holdings” “ADTRAN” or the “Company”) today announced its unaudited financial results for the first quarter ended March 31, 2026. • Revenue: $286.1 million, up 15.5% year-over-year. • GAAP gross margin of 39.5%; Non-GAAP gross margin of 43.0%; up 108 and 55 basis points year-over-year, respectively. • Operating margin: GAAP”
Debt Financings

ADTRAN Holdings, Inc. incurred convertible notes of $201,250,000 aggregate principal amount with U.S. Bank Trust Company, National Association at 3.75% per annum maturing September 15, 2030.

“On September 19, 2025, ADTRAN Holdings, Inc. (the “Company”) issued $201,250,000 aggregate principal amount of its 3.75% convertible senior notes due 2030 (the “Notes”).”

Ulrich Dopfer changed role as Vice President, Finance & Administration Planning at ADTRAN Holdings, Inc..

“In connection with Mr. Santo’s appointment, on March 6, 2025, the Company and Ulrich Dopfer, Senior Vice President of Finance and Chief Financial Officer of the Company, agreed that Mr. Dopfer will no longer serve as the Company’s Chief Financial Officer, Secretary, Treasurer and principal accounting officer, effective March 10, 2025.”

Timothy Santo was appointed as Senior Vice President of Finance and Chief Financial Officer at ADTRAN Holdings, Inc..

“On March 6, 2025, ADTRAN Holdings, Inc. (the “Company”) announced the appointment of Mr. Timothy Santo as Senior Vice President of Finance and Chief Financial Officer of the Company, effective as of Mr. Santo’s employment start date, which is expected to be March 10, 2025.”

Brian Protiva resigned as member of the Board of Directors at ADTRAN Holdings, Inc..

“On July 31, 2024, Mr. Brian Protiva notified ADTRAN Holdings, Inc. (the “Company”) of his resignation from his role as a member of the Company’s Board of Directors (the “Board”), effective immediately.”
Earnings Releases

ADTRAN Holdings, Inc. reported first quarter of 2024 results: net income GAAP net loss attributable to the Company for the first quarter of 2024, including the above mentioned impairment charge, EPS Diluted loss per share attributable to the Company for the first quarter was $4.12. Guidance reaffirmed.

“GAAP net loss attributable to the Company for the first quarter of 2024, including the above mentioned impairment charge, was $324.6 million. Diluted loss per share attributable to the Company for the first quarter was $4.12.”
Earnings Releases

ADTRAN Holdings, Inc. reported preliminary financial results for first quarter of 2024.

“ADTRAN Holdings, Inc.: Non-cash goodwill impairment for the first quarter 2024 in an estimated amount of $293 million”

Facts are extracted by an LLM and gated to those whose source quote is present verbatim in the filing text. Coverage is best-effort while backfill and monitoring mature; this is not yet a full-market index. See methodology.