secwatch / observer
ADTN ADTRAN Holdings, Inc.
CIK 0000926282 50 ready 8-Ks latest May 5, 2026, 7:59 PM ET RSS · JSON
Activity: NORMAL 1 filings / 30d vs 1 baseline
Ready 8-Ks 50
Latest filing June 26, 2026, 7:02 AM ET
Top materiality 0.90
Event mix earnings ×17 · other_material ×15 · leadership ×10
Sentiment 10 pos · 18 neg · 22 neu
Latest earnings reported 2026-Q1
Executive change recent →

Recent 8-K filings for ADTN

Executive changes

Appointed

Anne DelSanto

Director
ADTN · ADTRAN Holdings, Inc.
Effective
2026-07-01
Filed
June 26, 2026, 7:02 AM ET
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
Appointed

Timothy Santo

Senior Vice President of Finance and Chief Financial Officer
ADTN · ADTRAN Holdings, Inc.
Effective
2025-03-10
Filed
March 7, 2025, 6:59 PM ET
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.
Role change

Ulrich Dopfer

Vice President, Finance & Administration Planning
ADTN · ADTRAN Holdings, Inc.
Effective
2025-03-10
Successor
Timothy Santo
Filed
March 7, 2025, 6:59 PM ET
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.
Departed

Brian Protiva

member of the Board of Directors
ADTN · ADTRAN Holdings, Inc.
Effective
2024-07-31
Filed
August 2, 2024, 7:59 PM ET
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.
Departed

Ronald D. Centis

Senior Vice President of Services
ADTN · ADTRAN Holdings, Inc.
Effective
2023-12-15
Filed
December 6, 2023, 6:59 PM ET
Mr. Ronald D. Centis, Senior Vice President of Services and a named executive officer of the Company (as identified in the Company’s definitive proxy statement on Schedule 14A filed on March 28, 2023), will depart from the Company, effective December 15, 2023 (the “ Separation Date ”).
Departed

Johanna Hey

Director
ADTN · ADTRAN Holdings, Inc.
Effective
2023-09-30
Filed
September 29, 2023, 7:59 PM ET
On September 25, 2023, Johanna Hey notified the Board of Directors (the “Board”) of ADTRAN Holdings, Inc. (the “Company”) of her intent to resign from her role as a director of the Company, effective as of September 30, 2023, for family and medical reasons.
Departed

Michael Foliano

Senior Vice President of Finance and Chief Financial Officer
ADTN · ADTRAN Holdings, Inc.
Effective
2023-06-28
Filed
June 28, 2023, 7:59 PM ET
Michael Foliano, the former Senior Vice President of Finance and Chief Financial Officer of the Company, notified the Company of his intent to retire, effective June 28, 2023
Appointed

Thomas Stanton

Chief Executive Officer of ADVA
ADTN · ADTRAN Holdings, Inc.
Effective
2023-07-01
Filed
May 30, 2023, 7:59 PM ET
Thomas Stanton, President and CEO of the Company, will assume the position of CEO of ADVA effective July 1, 2023.
Role change

Christoph Glingener

Chief Technology Officer of ADVA
ADTN · ADTRAN Holdings, Inc.
Effective
2023-06-30
Successor
Thomas Stanton
Filed
May 30, 2023, 7:59 PM ET
Christoph Glingener, Chief Technology Officer of the Company, will step down as Chief Executive Officer (“CEO”) of ADVA effective June 30, 2023, at which time he will transition to his previous role of Chief Technology Officer (“CTO”) of ADVA.
Departed

Michael Foliano

Senior Vice President of Finance and Chief Financial Officer
ADTN · ADTRAN Holdings, Inc.
Effective
2023-04-30
Successor
Ulrich Dopfer
Filed
March 30, 2023, 7:59 PM ET
On March 27, 2023, Michael Foliano, Senior Vice President of Finance and Chief Financial Officer of ADTRAN Holdings, Inc. (the “Company”), notified the Company of his intent to retire from the Company, effective June 28, 2023
Appointed

Ulrich Dopfer

Chief Financial Officer
ADTN · ADTRAN Holdings, Inc.
Effective
2023-05-01
Filed
March 30, 2023, 7:59 PM ET
on March 27, 2023, the Board of Directors of the Company appointed Ulrich Dopfer as Chief Financial Officer of the Company, effective May 1, 2023
Role change

Brian Protiva

Chief Executive Officer of ADVA
ADTN · ADTRAN Holdings, Inc.
Effective
2022-08-31
Filed
September 30, 2022, 7:59 PM ET
Mr. Protiva would resign as Chief Executive Officer ("CEO") of ADVA and as a member of the management board of ADVA effective August 31, 2022,

Earnings & guidance

2026-Q1 EPS reported -$0.01 filing →

Materiality & sentiment trend

Max materiality 0.90 · Median 0.65 · Most common event earnings

10 positive 18 negative 22 neutral

source · ADTN on sec.gov