Adtran Holdings (ADTN)Royce & Associates LP added to its stake +530K shares

3.13M

Shares reported · +530K vs prior quarter

0.39%

Disclosed portfolio weight

$39.3M

Reported value

Holdings as of

Mar 31, 2026

Filed

May 12, 2026

The story around this disclosure

Every dated public record OQRO holds about the company from 60 days before to 120 days after, oldest first. It shows what was going on; none of it is a stated reason for the trade.

1. Apr 1, 2026Company filing · Form 8-K · Executive changeChanged a top executive or board member“On April 6, 2026, ADTRAN Holdings, Inc. (the “Company”) entered into a second amendment (the “Amendment”) to its employment agreement, dated July 13, 2022 (as previously amended, the “Employment Agreement”), with Thomas R. Stanton, the Company’s President, Chief Executive Officer and Chairman (the “CEO”).”
2. May 4, 2026Company filing · Form 8-K · Results, Reg FDReported its results, and shared information with investors

What came next

1. May 13, 2026Company filing · Form 8-K · Bylaws or charter, Shareholder voteChanged its bylaws, charter or fiscal year, and held a shareholder vote
2. Jun 23, 2026Company filing · Form 8-K · Executive change, Other newsChanged a top executive or board member, and reported other company news“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”).”
3. Jul 21, 2026Company filing · Form 8-K · Results, Reg FDReported its results, and shared information with investors
4. Jul 21, 2026Company filing · Form 8-K · Material agreement, Agreement endedSigned an important agreement, and ended an important agreement (and 1 more item)
5. Aug 3, 2026Company filing · Form 8-K · Results, Reg FDReported its results, and shared information with investors
6. Aug 10, 2026Company filing · Form 8-K · Executive changeChanged a top executive or board member“On August 10, 2026, Adtran Networks SE (“Adtran Networks”), a majority-owned subsidiary of ADTRAN Holdings, Inc. (the “Company”), entered into an amendment (the “Amendment”) to its employment agreement with Christoph Glingener, the Company’s Chief Technology Officer (“CTO”) and the CTO and a member of the management board of Adtran Networks.”

How to read SEC Form 13F-HR

Form 13F is the quarterly report in which investment managers that oversee $100 million or more list the US-listed stocks and some other securities they held on the last day of the quarter.

Full guide: What is an SEC Form 13F?

What else is on file for Adtran Holdings

For Adtran Holdings, OQRO holds 1 fund holdings report (13F) dated in the last 90 days.

These are records OQRO holds, counted by their date, not a measure of how much trading took place. Routine paperwork such as option exercises and tax withholding is left out. Everything for the company is on its ADTN page.

How this filing works

• SEC Form 13F

Other disclosures at Adtran Holdings

• SEC Form 13F-HRAug 14, 2026

Everything OQRO holds on this company is on its ADTN page.