W. R. Berkley reports 0.4% stake in Churchill IX

W. R. Berkley Corporation, through subsidiary Berkley Insurance Company, reports beneficial ownership of 104,360 Class A ordinary shares of Churchill Capital Corp IX (par value $0.0001 per share, CUSIP G21301109).

Rhea-AI Filing Summary

W. R. Berkley Corporation, through subsidiary Berkley Insurance Company, reports beneficial ownership of 104,360 Class A ordinary shares of Churchill Capital Corp IX (par value $0.0001 per share, CUSIP G21301109). This represents 0.4% of the outstanding class.

The reporting persons have shared voting and dispositive power over all 104,360 shares and no sole voting or dispositive power. The filing confirms that their holdings represent 5 percent or less of this class of securities.

Key Figures

Beneficially owned shares: 104,360 shares Percent of class owned: 0.4% Par value per share: $0.0001 per share +3 more

6 metrics

Beneficially owned shares 104,360 shares Class A ordinary shares of Churchill Capital Corp IX reported by W. R. Berkley Corporation

Percent of class owned 0.4% Percentage of Churchill Capital Corp IX Class A ordinary shares beneficially owned

Par value per share $0.0001 per share Par value of Churchill Capital Corp IX Class A ordinary shares

CUSIP G21301109 CUSIP for Churchill Capital Corp IX Class A ordinary shares

Shared voting power 104,360 shares Shares over which W. R. Berkley Corporation reports shared voting power

Sole voting power 0 shares Shares over which W. R. Berkley Corporation reports sole voting power

Key Terms

beneficially owned, shared voting power, shared dispositive power, parent holding company or control person, +1 more

5 terms

beneficially owned financial

"Item 4. | Ownership (a) | Amount beneficially owned: 104,360"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

shared voting power financial

"Shared Voting Power 104,360.00 7 | Sole Dispositive Power"

Shared voting power occurs when two or more parties jointly have the right to vote or decide how a block of company shares is cast, like co-owners who must agree before moving a piece of furniture. Investors care because who controls voting rights affects board elections, major corporate decisions and takeover outcomes, and shared control can alter regulatory disclosures and the practical influence any holder has over a company’s direction and value.

shared dispositive power financial

"8 | Shared Dispositive Power 104,360.00 9 104,360.00"

parent holding company or control person regulatory

"by the Parent Holding Company or Control Person. | If a parent holding"

percent of class financial

"(b) | Percent of class: 0.4 %"

Percent of class is the portion of a specific category of securities—such as a company’s common shares, preferred shares, or a bond series—that takes part in or approves a corporate action (vote, consent, tender, etc.). Investors watch this number because it reveals how much support or opposition exists within that particular shareholder group; like counting how many members of a club back a proposal, it can determine whether a plan passes or how influence is distributed.

FAQ

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

What percentage of Churchill Capital Corp IX (CCIX) does W. R. Berkley Corporation report owning?

W. R. Berkley Corporation reports beneficial ownership of 0.4% of Churchill Capital Corp IX’s Class A ordinary shares, representing 104,360 shares with shared voting and dispositive power over the entire reported position.

How many Churchill Capital Corp IX (CCIX) shares does W. R. Berkley Corporation beneficially own?

W. R. Berkley Corporation reports beneficial ownership of 104,360 Class A ordinary shares of Churchill Capital Corp IX, with 0 shares under sole voting or dispositive power and 104,360 under shared voting and dispositive power.

Does W. R. Berkley Corporation control more than 5% of Churchill Capital Corp IX (CCIX)?

No. The filing states W. R. Berkley Corporation’s beneficial ownership of Churchill Capital Corp IX Class A shares is 0.4%, and it is explicitly classified as ownership of 5 percent or less of the class.

Which subsidiary of W. R. Berkley is identified in the Churchill Capital Corp IX (CCIX) Schedule 13G/A?

The Schedule 13G/A identifies Berkley Insurance Company as the subsidiary associated with the 104,360 Churchill Capital Corp IX Class A shares, with shared voting and shared dispositive power over the entire reported position.

What voting powers does W. R. Berkley Corporation report over Churchill Capital Corp IX (CCIX) shares?

W. R. Berkley Corporation reports 0 shares with sole voting power and 104,360 shares with shared voting power. It also reports 0 shares with sole dispositive power and 104,360 with shared dispositive power.

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

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Available on EDGAR 08/05/2026 - 05:39 PM Accepted by SEC EDGAR 08/05/2026 - 05:38 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. 1)

CHURCHILL CAPITAL CORP IX

(Name of Issuer)

Class A ordinary shares, par value $0.0001 per share

(Title of Class of Securities)

G21301109

(CUSIP Number)

06/30/2026

(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)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): G21301109

1

Names of Reporting Persons

W. R. Berkley Corporation

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 0.00
6	Shared Voting Power 104,360.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 104,360.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

104,360.00

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)

0.4 %

12

Type of Reporting Person (See Instructions)

CO

SCHEDULE 13G

CUSIP Number(s): G21301109

1

Names of Reporting Persons

Berkley Insurance Company

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 0.00
6	Shared Voting Power 104,360.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 104,360.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

104,360.00

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)

0.4 %

12

Type of Reporting Person (See Instructions)

CO, IC

SCHEDULE 13G

Item 1.
(a)	Name of issuer: CHURCHILL CAPITAL CORP IX
(b)	Address of issuer's principal executive offices: 640 Fifth Avenue, 14th Floor, New York, New York, 10019
Item 2.
(a)	Name of person filing: W. R. Berkley Corporation
(b)	Address or principal business office or, if none, residence: 475 Steamboat Road Greenwich, CT 06830
(c)	Citizenship: US
(d)	Title of class of securities: Class A ordinary shares, par value $0.0001 per share
(e)	CUSIP No.: G21301109
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: 104,360
(b)	Percent of class: 0.4 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 0
	(ii) Shared power to vote or to direct the vote: 104,360
	(iii) Sole power to dispose or to direct the disposition of: 0
	(iv) Shared power to dispose or to direct the disposition of: 104,360
Item 5.	Ownership of 5 Percent or Less of a Class.
	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.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. See Exhibit 99.1
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.

W. R. Berkley Corporation

Signature:	/s/ Richard M. Baio
Name/Title:	Richard M. Baio/Executive Vice President and Chief Financial Officer
Date:	08/05/2026

Berkley Insurance Company

Signature:	/s/ Richard M. Baio
Name/Title:	Richard M. Baio/Executive Vice President and Treasurer
Date:	08/05/2026