Form 8-K
8-K — ADTRAN Holdings, Inc.
Accession: 0001193125-26-283882
Filed: 2026-06-26
Period: 2026-06-23
CIK: 0000926282
SIC: 3661 (TELEPHONE & TELEGRAPH APPARATUS)
Item: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers
Item: Other Events
Item: Financial Statements and Exhibits
Documents
8-K — adtn-20260623.htm (Primary)
EX-99.1 (adtn-ex99_1.htm)
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8-K
8-K (Primary)
Filename: adtn-20260623.htm · Sequence: 1
8-K
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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
FORM 8-K
CURRENT REPORT
Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
Date of Report (Date of earliest event reported): June 23, 2026
ADTRAN Holdings, Inc.
(Exact name of Registrant as Specified in Its Charter)
Delaware
001-41446
87-2164282
(State or Other Jurisdiction
of Incorporation)
(Commission File Number)
(IRS Employer
Identification No.)
901 Explorer Boulevard
Huntsville, Alabama
35806-2807
(Address of Principal Executive Offices)
(Zip Code)
Registrant’s Telephone Number, Including Area Code: (256) 963-8000
Not Applicable
(Former Name or Former Address, if Changed Since Last Report)
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:
☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))
Securities registered pursuant to Section 12(b) of the Act:
Title of each class
Trading
Symbol(s)
Name of each exchange on which registered
Common Stock, Par Value $0.01 per share
ADTN
Nasdaq Global Select Market
Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).
Emerging growth company ☐
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐
Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.
On June 23, 2026, the Board of Directors (the “Board”) of ADTRAN Holdings, Inc. (the “Company”), upon the recommendation of the Board’s Nominating and Corporate Governance Committee, voted unanimously to increase the size of the Board from six (6) to seven (7) directors and to elect Anne DelSanto to fill the vacancy created by the increase in the size of the Board, effective as of July 1, 2026 (the “Effective Date”). In connection with her election to the Board, Ms. DelSanto was appointed to the Compensation Committee of the Board, effective as of the Effective Date. The Board has determined that Ms. DelSanto qualifies as an “independent director” under Nasdaq listing standards.
There are no arrangements or understandings between Ms. DelSanto and any other person pursuant to which Ms. DelSanto was selected as a director of the Company. There are no related person transactions (within the meaning of Item 404(a) of Regulation S-K promulgated by the Securities and Exchange Commission) between Ms. DelSanto and the Company. Ms. DelSanto will receive compensation for her Board service in accordance with the Company’s standard compensation arrangements for non-employee directors, which are described under the caption “2025 Director Compensation” in the Company’s definitive proxy statement on Schedule 14A filed with the Securities and Exchange Commission on March 27, 2026, as adjusted by the Board from time to time.
Item 8.01 Other Events.
On June 25, 2026, the Company issued a press release announcing the appointment of Ms. DelSanto to the Board, which press release contains additional biographical information about Ms. DelSanto. A copy of this press release is attached hereto as Exhibit 99.1.
Item 9.01 Financial Statements and Exhibits.
(d) Exhibits
Exhibit Number
Description
99.1
Press Release dated June 25, 2026
104
Cover Page Interactive Data File – the cover page iXBRL tags are embedded within the Inline XBRL document
SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.
ADTRAN Holdings, Inc.
Date:
June 26, 2026
By:
/s/ Timothy Santo
Timothy Santo
Senior Vice President of Finance and
Chief Financial Officer
EX-99.1
EX-99.1
Filename: adtn-ex99_1.htm · Sequence: 2
EX-99.1
Exhibit 99.1
Adtran Holdings, Inc. Appoints Anne DelSanto to Board of Directors
HUNTSVILLE, Ala. – (June 25, 2026) – Adtran Holdings, Inc. (NASDAQ: ADTN and FSE: QH9), a leading global provider of networking and communications solutions, today announced the appointment of Anne DelSanto as an independent member of its Board of Directors effective July 1, 2026. The appointment aligns with Adtran's expanding relevance beyond its service provider core, into cloud infrastructure, AI-driven networking, and enterprise software, markets where Ms. DelSanto has spent the majority of her career.
Ms. DelSanto brings more than 30 years of experience in the global technology industry focused on cloud computing, software-as-a-service (SaaS), artificial intelligence, and enterprise go-to-market strategy. Her professional career included executive operational and technical roles at companies including Salesforce, Oracle, and IBM.
Ms. DelSanto currently serves on the board of directors of Advanced Energy (NASDAQ: AEIS), a company that designs and manufactures precision power solutions for hyperscale AI, semiconductor, and industrial markets, and on the boards of private technology companies, Axonius and StackAdapt. She formerly served on the boards of Juniper Networks and New Relic, both during their tenure of being publicly traded.
“Anne's experience building and scaling cloud and SaaS platforms will be a valuable addition to our Board,” said Tom Stanton, Chairman and Chief Executive Officer of Adtran Holdings, Inc. “Her relevant public board experience combined with her experience with hyperscalers, AI-driven infrastructure, and next-generation service provider solutions aligns with Adtran’s strategic direction. We are delighted to welcome her."
Ms. DelSanto holds a Bachelor of Science in mathematics with a concentration in computer science from St. John’s University and a Master of Science in administrative studies from Boston College. She has also completed advanced governance studies at Stanford University Law School’s Directors’ College.
About Adtran
ADTRAN Holdings, Inc. (NASDAQ: ADTN and FSE: QH9) is the parent company of Adtran, Inc., a leading global provider of open, disaggregated networking and communications solutions that enable voice, data, video and internet communications across any network infrastructure. From the cloud edge to the subscriber edge, Adtran empowers communications service providers around the world to manage and scale services that connect people, places and things. Adtran solutions are used by service providers, private enterprises, government organizations and millions of individual users worldwide. ADTRAN Holdings, Inc. is also the majority shareholder of Adtran Networks SE, formerly ADVA Optical Networking SE. Find more at Adtran.com, LinkedIn and X.
Published by
ADTRAN Holdings, Inc.
www.adtran.com
For media
Gareth Spence
+44 1904 699 358
public.relations@adtran.com
For investors
Rob Fink
investor.relations@adtran.com
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