STOCK TITAN

ADTRAN Holdings (NASDAQ: ADTN) CTO receives 27,924-share stock grant in Form 4 filing

(Neutral)
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Glingener Christoph reported acquisition or exercise transactions in this Form 4 filing.

ADTRAN Holdings, Inc. reported that Chief Technology Officer Christoph Glingener received an equity grant of 27,924 shares of common stock on 2026-08-10, reported at a price of $0.00 per share as a grant or award. Following this award, his directly held common stock position increased to 83,953 shares.

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Insider Glingener Christoph
Role Chief Technology Officer
Type Security Shares Price Value
Grant/Award Common Stock 27,924 $0.00 $0.00
Holdings After Transaction: Common Stock — 83,953 shares (Direct)
Shares granted 27,924 shares Common stock grant to CTO on 2026-08-10
Reported grant price $0.00 per share Per-share value for the 27,924-share award
Shares held after transaction 83,953 shares Direct common stock holdings of CTO following the grant
Number of acquisition transactions 1 Single grant, award, or other acquisition reported
Grant, award, or other acquisition regulatory
"Transaction code description is "Grant, award, or other acquisition" for the shares."
Form 4 regulatory
"Insider transaction is reported on SEC Form 4 for ADTRAN Holdings."
Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.
Chief Technology Officer financial
"Reporting person Christoph Glingener serves as Chief Technology Officer."
The chief technology officer is the senior executive who sets a company's technology vision and oversees development, engineering, and technical operations—think of them as the lead architect and head mechanic who decides what tools the business builds and how they run. Their choices affect product direction, cost structure, cybersecurity and scalability, so investors watch the CTO to gauge a company’s ability to innovate, compete and manage technical risk.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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FAQ

What did ADTRAN (ADTN) disclose about Christoph Glingener in this Form 4?

ADTRAN disclosed that Chief Technology Officer Christoph Glingener received a grant of 27,924 shares of common stock. After this equity award, his directly held position in ADTRAN common stock increased to 83,953 shares as of the reported transaction date.

How many ADTRAN (ADTN) shares were granted to the CTO in this filing?

The CTO, Christoph Glingener, was granted 27,924 shares of ADTRAN common stock. The transaction is coded as a grant, award, or other acquisition and was reported at a per-share price of $0.00, consistent with a compensatory equity award.

What is Christoph Glingener’s total ADTRAN (ADTN) shareholding after this Form 4 transaction?

After the reported grant, Christoph Glingener directly holds 83,953 shares of ADTRAN common stock. This reflects the addition of 27,924 shares from a grant, award, or similar acquisition, as indicated by the Form 4 ownership data.

Was the ADTRAN (ADTN) CTO’s Form 4 transaction a purchase or an award?

The transaction for Christoph Glingener is classified as a grant, award, or other acquisition under code A, not an open-market purchase. The Form 4 shows 27,924 shares acquired at a reported price of $0.00 per share, typical of equity compensation.

Does this ADTRAN (ADTN) Form 4 show any insider sales by the CTO?

No insider sales are reported for Christoph Glingener in this Form 4. The filing shows only a single acquisition transaction: a grant or award of 27,924 shares of common stock, increasing his direct holdings to 83,953 shares after the transaction.
SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Glingener Christoph

(Last)(First)(Middle)
C/O ADTRAN HOLDINGS, INC.
901 EXPLORER BOULEVARD

(Street)
HUNTSVILLE ALABAMA 35806-2807

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
ADTRAN Holdings, Inc. [ ADTN ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
Chief Technology Officer
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
08/10/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Common Stock08/10/2026A27,924A$083,953D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
/s/ Dan Ragsdale, by power of attorney08/10/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)