William Blair takes 5% passive stake in Diebold Nixdorf (DBD)

Rhea-AI Filing Summary

William Blair Investment Management, LLC filed a Schedule 13G showing a passive ownership stake in Diebold Nixdorf, Inc. common stock. It reports beneficial ownership of 1,802,571 shares, representing 5.0% of the outstanding common stock as of 12/31/2025.

The firm has sole voting power over 1,483,914 shares and sole dispositive power over all 1,802,571 shares, with no shared voting or dispositive power. It certifies the position was acquired and is held in the ordinary course of business, not to change or influence control of Diebold Nixdorf.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

DIEBOLD NIXDORF, Inc

(Name of Issuer)

Common Stock

(Title of Class of Securities)

253651202

(CUSIP Number)

12/31/2025

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13G

CUSIP No. 253651202

1

Names of Reporting Persons

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 1,483,914.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 1,802,571.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,802,571.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

5.0 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: DIEBOLD NIXDORF, Inc
(b)	Address of issuer's principal executive offices: 350 ORCHARD AVE NE, NORTH CANTON, OHIO, 44720
Item 2.
(a)	Name of person filing: William Blair Investment Management, LLC
(b)	Address or principal business office or, if none, residence: 150 North Riverside Plaza, Chicago, IL 60606
(c)	Citizenship: Delaware
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: 253651202
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 1,802,571
(b)	Percent of class: 5.0%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 1,483,914
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 1,802,571
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC

Signature:	Telmo Martins
Name/Title:	Chief Compliance Officer
Date:	02/09/2026

FAQ

What stake does William Blair Investment Management report in Diebold Nixdorf (DBD)?

William Blair Investment Management reports beneficial ownership of 1,802,571 Diebold Nixdorf common shares, representing 5.0% of the class as of 12/31/2025. This makes it a significant institutional shareholder crossing the 5% disclosure threshold.

Is William Blair’s position in Diebold Nixdorf (DBD) considered passive or activist?

William Blair certifies the Diebold Nixdorf shares were acquired and are held in the ordinary course of business and not for the purpose of changing or influencing control. This language characterizes the stake as a passive investment under Schedule 13G.

How many Diebold Nixdorf (DBD) shares can William Blair vote and dispose of?

William Blair reports sole voting power over 1,483,914 shares and sole dispositive power over all 1,802,571 shares. It reports no shared voting or shared dispositive power, indicating centralized control over the position within the firm.

What filing did William Blair submit regarding its Diebold Nixdorf (DBD) holdings?

William Blair filed a Schedule 13G relating to Diebold Nixdorf common stock, CUSIP 253651202. Schedule 13G is the short-form beneficial ownership report used by certain institutional investors for passive stakes of more than 5%.

When did William Blair’s reported ownership in Diebold Nixdorf (DBD) trigger the filing requirement?

The Schedule 13G lists 12/31/2025 as the date of the event requiring the statement. That date reflects when William Blair’s beneficial ownership position in Diebold Nixdorf common stock met the reporting conditions under the beneficial ownership rules.

Who signed the Schedule 13G for William Blair’s Diebold Nixdorf (DBD) position?

The Schedule 13G was signed by Telmo Martins, identified as Chief Compliance Officer. The signature section certifies, after reasonable inquiry, that the information provided about William Blair’s Diebold Nixdorf holdings is true, complete, and correct.