Core Laboratories (CLB): DGI holds 5,969,860 shares (12.8%) 13G/A

Disciplined Growth Investors, Inc. filed Amendment No. 4 to Schedule 13G reporting beneficial ownership of 5,969,860 Core Laboratories (CLB) common shares, representing 12.8% of the class as of 09/30/2025.

Rhea-AI Filing Summary

Disciplined Growth Investors, Inc. filed Amendment No. 4 to Schedule 13G reporting beneficial ownership of 5,969,860 Core Laboratories (CLB) common shares, representing 12.8% of the class as of 09/30/2025.

The filer reports sole voting power over 5,471,242 shares and sole dispositive power over 5,969,860 shares, with no shared voting or dispositive power. Classified as an investment adviser (IA), the firm certifies the securities were acquired and are held in the ordinary course and not for the purpose of changing or influencing control.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did Disciplined Growth Investors report in the CLB Schedule 13G/A?

They reported 5,969,860 Core Laboratories common shares, or 12.8% of the class, as of 09/30/2025.

How much voting power does DGI report for CLB?

DGI reports sole voting power over 5,471,242 shares and no shared voting power.

What dispositive power does DGI have over CLB shares?

DGI reports sole dispositive power over 5,969,860 shares and no shared dispositive power.

What percentage of Core Laboratories does DGI own?

DGI reports beneficial ownership of 12.8% of Core Laboratories’ common shares.

What is the event date for this ownership report?

The event date is 09/30/2025.

How does DGI characterize its intent regarding control of CLB?

DGI certifies the holdings are in the ordinary course and not to change or influence control.

What is DGI’s filer classification on this 13G/A?

DGI is classified as an Investment Adviser (IA).

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

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Accepted by SEC EDGAR 11/14/2025 - 03:42 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 4)

Core Laboratories Inc. /DE/

(Name of Issuer)

Common Shares

(Title of Class of Securities)

21867A105

(CUSIP Number)

09/30/2025

(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. 21867A105

1

Names of Reporting Persons

DISCIPLINED GROWTH INVESTORS INC /MN

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

MINNESOTA

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 5,471,242.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 5,969,860.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

5,969,860.00

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)

12.8 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Core Laboratories Inc. /DE/
(b)	Address of issuer's principal executive offices: 6316 WINDFERN ROAD, 6316 WINDFERN ROAD, HOUSTON, TEXAS, 77040.
Item 2.
(a)	Name of person filing: Disciplined Growth Investors, Inc
(b)	Address or principal business office or, if none, residence: 150 South Fifth Street Suite 2550 Minneapolis, MN 55402
(c)	Citizenship: Minnesota, USA
(d)	Title of class of securities: Common Shares
(e)	CUSIP No.: 21867A105
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: 5,969,860
(b)	Percent of class: 12.8%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 5,471,242
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 5,969,860
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
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.

DISCIPLINED GROWTH INVESTORS INC /MN

Signature:	Peter G. Rieke
Name/Title:	Chief Operating & Compliance Officer
Date:	11/14/2025