Capital World Investors: 4.4% Stake in Accelerant Holdings

Capital World Investors reported beneficial ownership of 5,152,741 shares of Accelerant Holdings common stock, equal to 4.4% of the 116,757,858 shares believed to be outstanding.

Rhea-AI Filing Summary

Capital World Investors reported beneficial ownership of 5,152,741 shares of Accelerant Holdings common stock, equal to 4.4% of the 116,757,858 shares believed to be outstanding.

The amendment (Schedule 13G/A) is signed May 13, 2026, and states CWI has sole voting and sole dispositive power over the 5,152,741 shares.

Insights

Institutional Ownership Analyst

Large institutional stake disclosed: 5,152,741 shares (4.4%).

Capital World Investors is reported as the beneficial owner of 5,152,741 shares, with sole voting and sole dispositive power. The filing identifies the stake as 4.4% of the 116,757,858 shares believed outstanding and is an amendment to a Schedule 13G.

This disclosure is a standard institutional ownership update; subsequent changes would appear in later ownership amendments or proxy-related filings. Timing and cash‑flow treatment are not described in the excerpt.

Key Figures

Shares beneficially owned: 5,152,741 shares Percent of class: 4.4% Shares outstanding (believed): 116,757,858 shares

3 metrics

Shares beneficially owned 5,152,741 shares Beneficial ownership reported by Capital World Investors

Percent of class 4.4% Percentage of the 116,757,858 shares believed outstanding

Shares outstanding (believed) 116,757,858 shares Shares believed to be outstanding used to compute 4.4%

Key Terms

Schedule 13G/A, beneficial owner, sole dispositive power

3 terms

Schedule 13G/A regulatory

"Amendment No. 1 ) Accelerant Holdings Common Stock"

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

beneficial owner financial

"CWI is deemed to be the beneficial owner of 5,152,741 shares"

A beneficial owner is the person who ultimately owns or controls a financial asset or property, even if their name isn't directly on official documents. Think of it like someone who secretly holds the keys to a safe deposit box—others may appear to have access, but the true owner is the one who benefits from what's inside. Identifying beneficial owners helps ensure transparency and prevent illegal activities like money laundering or fraud.

sole dispositive power regulatory

"Sole power to dispose or to direct the disposition of: 5,152,741"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

FAQ

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

What stake does Capital World Investors hold in Accelerant Holdings (ARX)?

Capital World Investors holds 5,152,741 shares, representing 4.4% of the 116,757,858 shares believed outstanding. The Schedule 13G/A amendment states CWI has sole voting and dispositive power over those shares, per the May 13, 2026 signature.

When was the Schedule 13G/A amendment for ARX signed?

The amendment was signed on May 13, 2026. It updates the filer’s ownership disclosure and confirms the filer’s sole voting and dispositive power over the reported 5,152,741 shares.

Does Capital World Investors report shared voting power over ARX shares?

No. The filing states CWI has sole voting power of 5,152,741 shares and 0 shared voting power. The filing lists sole dispositive power of 5,152,741 as well.

Is the disclosed position above 5% of ARX outstanding shares?

No. The disclosed position is 4.4% of the 116,757,858 shares believed outstanding, which is below the 5% threshold and categorized as "Ownership of 5 percent or less of a class" in the filing.

Who signed the amended Schedule 13G/A for Accelerant Holdings?

The amendment is signed by Jae Won Chung, identified as Senior Vice President and Associate General Counsel of Capital Research and Management Company, on May 13, 2026.

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

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Accepted by SEC EDGAR 05/14/2026 - 01:55 PM EDT 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)

Accelerant Holdings

(Name of Issuer)

Common Stock

(Title of Class of Securities)

G00894108

(CUSIP Number)

03/31/2026

(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): G00894108

1

Names of Reporting Persons

Capital World Investors

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 5,152,741.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 5,152,741.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

5,152,741.00

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)

4.4 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Accelerant Holdings
(b)	Address of issuer's principal executive offices: C/o Accelerant Re (Cayman) Ltd., Unit 106 Windward3 Regatta Office Park West Bay Rd, Grand Cayman KY1-1108, Cayman Islands
Item 2.
(a)	Name of person filing: Capital World Investors
(b)	Address or principal business office or, if none, residence: 333 SOUTH HOPE STREET, 55TH FLOOR, LOS ANGELES, CALIFORNIA 90071
(c)	Citizenship: N/A
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: G00894108
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: 5,152,741 ** **Capital World Investors ("CWI") is a division of Capital Research and Management Company ("CRMC"), as well as its investment management subsidiaries and affiliates Capital Bank and Trust Company, Capital International, Inc., Capital International Limited, Capital International Sarl, Capital International K.K., Capital Group Private Client Services, Inc., and Capital Group Investment Management Private Limited (together with CRMC, the "investment management entities"). CWI's divisions of each of the investment management entities collectively provide investment management services under the name "Capital World Investors." CWI is deemed to be the beneficial owner of 5,152,741 shares or 4.4% of the 116,757,858 shares believed to be outstanding.
(b)	Percent of class: 4.4 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 5,152,741
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 5,152,741
	(iv) Shared power to dispose or to direct the disposition of: 0
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.
	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.

Capital World Investors

Signature:	Jae Won Chung
Name/Title:	Senior Vice President and Associate General Counsel, Capital Research and Management Company
Date:	05/13/2026