ADTN ADTRAN Holdings, Inc.

CIK 0000926282 29 ready 8-Ks latest May 5, 2026, 7:59 PM ET RSS · JSON

Activity: NORMAL 2 filings / 30d vs 1 baseline

Ready 8-Ks 29

Latest filing May 18, 2026, 10:10 AM ET

Top materiality 0.85

Event mix earnings ×12 · other_material ×9 · debt ×4

Sentiment 9 pos · 7 neg · 13 neu

Latest earnings reported 2026-Q1

Executive change recent →

Recent 8-K filings for ADTN

Highest-materiality recent filing

ADTRAN Holdings restates FY23/FY24 results; €5.7M inventory error; annual meeting postponed

May 13, 2025, 7:59 PM ET other material materiality 0.85 negative item 4.02 item 8.01 item 9.01

Audit Committee concludes 2023 and 2024 annual and interim financials should no longer be relied upon due to inventory adjustment.
Subsidiary Adtran Networks SE's €5.7M increase in cost of goods sold was not properly communicated before filing.

Read filing →

May 5, 2026, 7:59 PM ET earnings materiality 0.70 positive item 2.02 item 7.01 item 9.01 ◈ Earnings Releases

ADTRAN Q1 revenue $286.1M (+15.5% YoY); non-GAAP EPS $0.14; guides Q2 rev $283-303M

Revenue $286.1M (+15.5% YoY); GAAP diluted loss $0.01; non-GAAP diluted EPS $0.14.
February 26, 2026, 6:59 PM ET earnings materiality 0.75 positive item 2.02 item 7.01 item 9.01

Adtran Q4 revenue $291.6M (+20.1% YoY), beats guidance; non-GAAP EPS $0.16

Q4 revenue $291.6M, +20.1% YoY; GAAP diluted loss per share $0.02, non-GAAP diluted EPS $0.16.
January 22, 2026, 6:59 PM ET earnings materiality 0.75 positive item 2.02 item 7.01 item 9.01

ADTRAN preliminary Q4 revenue $290-293M beats guidance; non-GAAP EPS above consensus

Preliminary Q4 revenue $290-293M, above guidance of $275-285M.
November 4, 2025, 6:59 PM ET earnings materiality 0.75 positive item 2.02 item 7.01 item 9.01

ADTRAN Q3 revenue $279.4M (+23% YoY); non-GAAP EPS $0.05; guides Q4 rev $275-285M

Revenue $279.4M, up 23% YoY; GAAP gross margin 38.3%, non-GAAP 42.1%.
September 22, 2025, 7:59 PM ET debt materiality 0.65 neutral item 1.01 item 2.03 item 3.02 item 9.01 ◈ Debt Financings

ADTRAN issues $201.25M of 3.75% convertible notes due 2030, enters capped call transactions

Issued $201.25M aggregate principal of 3.75% convertible senior notes due Sept 15, 2030; includes full $26.25M greenshoe exercise.
September 17, 2025, 7:59 PM ET debt materiality 0.60 neutral item 1.01 item 8.01 item 9.01

ADTRAN prices upsized $175M 3.75% convertible notes due 2030; proceeds to repay Wells Fargo borrowings

Upsized from $150M to $175M; initial purchasers have option for additional $26.25M.
August 5, 2025, 7:59 PM ET earnings materiality 0.80 positive item 2.02 item 7.01 item 9.01

ADTRAN Q2 rev $265.1M (+17% YoY); guides Q3 rev $270-280M, non-GAAP op margin 3-7%

Revenue $265.1M, up 17% YoY; GAAP gross margin 37.3%, non-GAAP 41.4%.
July 17, 2025, 7:59 PM ET earnings materiality 0.65 positive item 2.02 item 7.01 item 9.01

ADTRAN pre-announces Q2 2025 revenue $262.5M-$267.5M, above guidance

Preliminary Q2 2025 revenue $262.5M-$267.5M, 0-2% above prior guidance upper end of $262.5M.
July 16, 2025, 7:59 PM ET earnings materiality 0.70 positive item 2.02 item 7.01 item 9.01

ADTRAN preliminary Q2 revenue $262.5M-$267.5M, above prior guidance range

Preliminary Q2 revenue $262.5M-$267.5M, exceeding guidance of $247.5M-$262.5M.
May 28, 2025, 7:59 PM ET other material materiality 0.75 negative item 2.02 item 9.01

ADTRAN Holdings restates 2024 and 2023 financials; updates Q1 2025 non-GAAP measures

Restated consolidated financial statements for fiscal years 2024 and 2023 and interim periods in 2024.
May 13, 2025, 7:59 PM ET other material materiality 0.85 negative item 4.02 item 8.01 item 9.01

ADTRAN Holdings restates FY23/FY24 results; €5.7M inventory error; annual meeting postponed

Audit Committee concludes 2023 and 2024 annual and interim financials should no longer be relied upon due to inventory adjustment.
May 12, 2025, 7:59 PM ET debt materiality 0.75 negative item 1.01 item 9.01

ADTN enters Fifth Amendment waiving defaults, reducing credit line to $350M

Fifth Amendment waives existing events of default from inaccurate financials for Q2/Q3 2024 and covenant breaches.
May 8, 2025, 7:59 PM ET earnings materiality 0.75 positive item 2.02 item 7.01 item 9.01

ADTRAN Q1 revenue $247.7M (+10% YoY); non-GAAP EPS $0.03, GAAP loss $0.13

Revenue $247.7M, up 10% YoY and above midpoint of Q1 outlook; GAAP gross margin 38.5%, non-GAAP 42.6%.
April 16, 2025, 7:59 PM ET other material materiality 0.65 negative item 7.01 item 9.01

Adtran Networks SE revises 2024 loss to EUR 10.2M from previously reported EUR 4.5M loss

Inventory adjustment increased cost of goods sold, widening EBIT loss by EUR 5.7M.
March 7, 2025, 6:59 PM ET leadership materiality 0.65 neutral item 5.02 item 7.01 item 9.01 ◈ executive_change ×2

ADTRAN Holdings appoints Timothy Santo as CFO; Ulrich Dopfer transitions to new role

Timothy Santo named CFO, effective March 10, 2025; annual base salary of $460,000 plus bonus and equity grants.
February 27, 2025, 6:59 PM ET earnings materiality 0.60 positive item 2.02 item 7.01 item 9.01

ADTRAN Q4 revenue $242.9M (+7% seq); GAAP EPS -$0.58, non-GAAP EPS $0.00

Q4 2024 revenue $242.9M, above mid-point of outlook; GAAP gross margin 37.6%, non-GAAP 42.0%.
November 7, 2024, 6:59 PM ET earnings materiality 0.65 neutral item 2.02 item 7.01 item 9.01

ADTN Q3 revenue $227.7M, above guidance midpoint; non-GAAP op margin positive 1.1%

GAAP diluted loss per share $0.36; non-GAAP diluted loss per share $0.05.
August 30, 2024, 7:59 PM ET other material materiality 0.60 neutral item 5.02 item 9.01

ADTRAN extends CFO and CTO contracts through 2025; reverses salary cuts due to German law restrictions

Extension of employment for CFO Ulrich Dopfer and CTO Christoph Glingener to Dec 31, 2025.
August 6, 2024, 7:59 PM ET earnings materiality 0.70 negative item 2.02 item 7.01 item 9.01

ADTRAN Q2 revenue $226M, GAAP net loss $49.9M ($0.63/share); Q3 rev guidance $215-235M

Revenue $226M; GAAP gross margin 36.1%, non-GAAP 41.9%.
May 7, 2024, 7:59 PM ET earnings materiality 0.75 negative item 2.02 item 7.01 item 9.01 ◈ Earnings Releases

ADTRAN Q1 GAAP net loss $324.6M on goodwill impairment; revenue above guidance midpoint

GAAP net loss $324.6M ($4.12 diluted EPS); includes non-cash goodwill impairment.
May 3, 2024, 7:59 PM ET other material materiality 0.75 negative item 2.02 item 7.01 item 9.01 ◈ Earnings Releases

ADTRAN expects $293M Q1 2024 goodwill impairment in Network Solutions segment

Non-cash goodwill impairment of $293M for Network Solutions segment in Q1 2024.

Executive changes

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.

Earnings & guidance

2026-Q1 EPS reported -$0.01 filing →

Materiality & sentiment trend

Max materiality 0.85 · Median 0.65 · Most common event earnings

9 positive 7 negative 13 neutral

source · ADTN on sec.gov