Kayne Anderson Rudnick holds 8.7% of Simpson Manufacturing

Kayne Anderson Rudnick Investment Management, LLC reported its beneficial ownership of Simpson Manufacturing Co Inc common stock.

Rhea-AI Filing Summary

Kayne Anderson Rudnick Investment Management, LLC reported its beneficial ownership of Simpson Manufacturing Co Inc common stock. The firm holds 3,568,491 shares, representing 8.7% of the outstanding common stock. It has sole voting power over 2,465,845 shares and shared voting power over 671,417 shares.

The firm has sole dispositive power over 2,897,074 shares and shared dispositive power over 671,417 shares. The filing identifies Kayne Anderson Rudnick Investment Management, LLC, organized in California, as the reporting person for this ownership position.

Key Figures

Beneficially owned shares: 3,568,491 shares Percent of class: 8.7% Sole voting power: 2,465,845 shares +3 more

6 metrics

Beneficially owned shares 3,568,491 shares Total Simpson Manufacturing common stock beneficially owned by Kayne Anderson Rudnick

Percent of class 8.7% Portion of Simpson Manufacturing common stock class held beneficially

Sole voting power 2,465,845 shares Shares over which Kayne Anderson Rudnick has sole power to vote

Shared voting power 671,417 shares Shares over which Kayne Anderson Rudnick has shared power to vote

Sole dispositive power 2,897,074 shares Shares over which Kayne Anderson Rudnick has sole power to dispose

Shared dispositive power 671,417 shares Shares over which Kayne Anderson Rudnick has shared power to dispose

Key Terms

beneficially owned, sole voting power, shared voting power, sole dispositive power, +1 more

5 terms

beneficially owned financial

"Item 4. | Ownership (a) | Amount beneficially owned: 3,568,491"

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.

sole voting power financial

"Sole Voting Power 2,465,845.00 6 | Shared Voting Power 671,417.00"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

shared voting power financial

"Sole Voting Power 2,465,845.00 6 | Shared Voting Power 671,417.00"

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.

sole dispositive power financial

"Sole Dispositive Power 2,897,074.00 8 | Shared Dispositive Power 671,417.00"

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.

shared dispositive power financial

"Sole Dispositive Power 2,897,074.00 8 | Shared Dispositive Power 671,417.00"

FAQ

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

How much of Simpson Manufacturing (SSD) does Kayne Anderson Rudnick beneficially own?

Kayne Anderson Rudnick beneficially owns 3,568,491 shares of Simpson Manufacturing common stock, representing 8.7% of the class. This stake reflects combined positions over which it has various voting and dispositive powers.

What voting power does Kayne Anderson Rudnick report in Simpson Manufacturing (SSD)?

Kayne Anderson Rudnick reports sole voting power over 2,465,845 Simpson Manufacturing shares and shared voting power over 671,417 shares. These figures indicate how many shares it can vote independently versus jointly.

What dispositive power does Kayne Anderson Rudnick have over Simpson Manufacturing (SSD) shares?

The firm has sole dispositive power over 2,897,074 Simpson Manufacturing shares and shared dispositive power over 671,417 shares. Dispositive power refers to the authority to sell or otherwise dispose of the shares.

What percentage of Simpson Manufacturing (SSD) is held by Kayne Anderson Rudnick?

Kayne Anderson Rudnick holds 8.7% of Simpson Manufacturing’s outstanding common stock. This percentage is based on its reported beneficial ownership of 3,568,491 shares.

Who signed the ownership report for Simpson Manufacturing (SSD) on behalf of Kayne Anderson Rudnick?

The report was signed by Michael Shoemaker, Chief Compliance Officer of Kayne Anderson Rudnick Investment Management, LLC, dated 08/13/2026. This signature certifies the accuracy of the reported ownership information.

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

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Available on EDGAR 08/13/2026 - 04:07 PM Accepted by SEC EDGAR 08/13/2026 - 04:05 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. 7)

Simpson Manufacturing Co Inc

(Name of Issuer)

Common Stock

(Title of Class of Securities)

829073105

(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): 829073105

1

Names of Reporting Persons

Kayne Anderson Rudnick 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

CALIFORNIA

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 2,465,845.00
6	Shared Voting Power 671,417.00
7	Sole Dispositive Power 2,897,074.00
8	Shared Dispositive Power 671,417.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

3,568,491.00

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)

8.7 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Simpson Manufacturing Co Inc
(b)	Address of issuer's principal executive offices: 5956 W LAS POSITAS BLVD, PLEASANTON, CA, 94588
Item 2.
(a)	Name of person filing: Kayne Anderson Rudnick Investment Management, LLC
(b)	Address or principal business office or, if none, residence: Kayne Anderson Rudnick Investment Management, LLC - 2000 Avenue of the Stars, Suite 1110, Los Angeles, CA 90067, US
(c)	Citizenship: Kayne Anderson Rudnick Investment Management, LLC - CALIFORNIA
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: 829073105
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: 3,568,491
(b)	Percent of class: 8.7 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 2,465,845
	(ii) Shared power to vote or to direct the vote: 671,417
	(iii) Sole power to dispose or to direct the disposition of: 2,897,074
	(iv) Shared power to dispose or to direct the disposition of: 671,417
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.

Kayne Anderson Rudnick Investment Management, LLC

Signature:	/s/Michael Shoemaker
Name/Title:	Chief Compliance Officer
Date:	08/13/2026