Simpson CEO sells 3,502 shares at $172.84

Rhea-AI Filing Summary

Simpson Manufacturing Co., Inc. (SSD) reports that President and CEO Michael Olosky sold 3,502 shares of common stock on September 10, 2026 in an open-market transaction at a weighted average price of $172.84 per share, with individual trades between $172.83 and $172.91. Following this sale, he directly holds 51,398 shares, which include unvested Restricted Stock Units and shares deferred under the company’s Nonqualified Plan, as well as 4 additional shares corrected from a prior administrative error. No Rule 10b5-1 trading plan is reported.

Insider Trade Summary

Net Seller: 3,502 shares

Net Sell 1 txn

Insider Olosky Michael

Role President and CEO

Sold 3,502 shs ($605K)

Type	Security	Shares	Price	Value
Sale	Common Stock F1, F2	3,502	$172.84	$605K

Holdings After Transaction: Common Stock — 51,398 shares (Direct)

Footnotes (2)

1. F1. The price reported is a weighted average sales price. The shares were sold in multiple transactions at prices ranging from $172.83 to $172.91, inclusive. The reporting person undertakes to provide to the Company, any security holder of the Company or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.
2. F2. Includes Restricted Stock Units that have not yet vested and shares of common stock deferred under the Simpson Manufacturing Co., Inc. Nonqualified Plan (the "Plan") which will settle pursuant to the applicable terms of the reporting person's deferral election. Also includes an additional 4 shares not previously reported due to an administrative error.

Key Figures

Shares sold: 3,502 shares Weighted average sale price: $172.84 per share Sale price range: $172.83–$172.91 per share +2 more

5 metrics

Shares sold 3,502 shares Open-market sale by CEO on September 10, 2026

Weighted average sale price $172.84 per share September 10, 2026 sale of 3,502 shares

Sale price range $172.83–$172.91 per share Multiple transactions on September 10, 2026

Shares held after transaction 51,398 shares Direct holdings by CEO after the reported sale

Previously unreported shares corrected 4 shares Added to CEO’s holdings due to administrative error correction

Key Terms

Restricted Stock Units, Nonqualified Plan, weighted average sales price

3 terms

Restricted Stock Units financial

"Includes Restricted Stock Units that have not yet vested"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

Nonqualified Plan financial

"deferred under the Simpson Manufacturing Co., Inc. Nonqualified Plan"

weighted average sales price financial

"The price reported is a weighted average sales price."

FAQ

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

What insider transaction did SSD report for CEO Michael Olosky?

SSD reported that CEO Michael Olosky sold 3,502 shares of common stock on September 10, 2026 in an open-market transaction at a weighted average price of $172.84 per share, with individual sale prices ranging from $172.83 to $172.91.

How many SSD shares does the CEO hold after this Form 4 transaction?

After the reported sale, CEO Michael Olosky directly holds 51,398 shares of SSD common stock. This amount includes Restricted Stock Units, shares deferred under the Nonqualified Plan, and an additional 4 shares that were previously unreported due to an administrative error.

Was the SSD CEO’s September 10, 2026 sale under a Rule 10b5-1 plan?

No. The filing indicates that the Rule 10b5-1 checkbox is not marked, and there is no footnote stating that the September 10, 2026 sale of 3,502 shares was made pursuant to a Rule 10b5-1 trading plan.

What price range did the SSD CEO’s shares sell for on September 10, 2026?

The 3,502 SSD shares sold by the CEO on September 10, 2026 were executed in multiple transactions at prices ranging from $172.83 to $172.91 per share, with a reported weighted average sales price of $172.84 per share.

What types of equity awards are included in the SSD CEO’s reported holdings?

The CEO’s post-transaction holdings of 51,398 shares include Restricted Stock Units that have not yet vested and shares of common stock deferred under the Simpson Manufacturing Co., Inc. Nonqualified Plan, which will settle according to his deferral election terms.

Did the SSD Form 4 mention any correction to prior share reporting?

Yes. A footnote states that the CEO’s reported holdings now also include an additional 4 shares that were not previously reported due to an administrative error, and these are included in the 51,398 shares held after the transaction.

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

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Available on EDGAR 09/11/2026 - 04:45 PM Accepted by SEC EDGAR 09/11/2026 - 04:44 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Olosky Michael

(Last) (First) (Middle)

5956 W. LAS POSITAS BLVD

(Street)

PLEASANTON CALIFORNIA 94588

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Simpson Manufacturing Co., Inc. [ SSD ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President and CEO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/10/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	09/10/2026		S		3,502	D	$172.84(1)	51,398(2)	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The price reported is a weighted average sales price. The shares were sold in multiple transactions at prices ranging from $172.83 to $172.91, inclusive. The reporting person undertakes to provide to the Company, any security holder of the Company or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

2. Includes Restricted Stock Units that have not yet vested and shares of common stock deferred under the Simpson Manufacturing Co., Inc. Nonqualified Plan (the "Plan") which will settle pursuant to the applicable terms of the reporting person's deferral election. Also includes an additional 4 shares not previously reported due to an administrative error.

Remarks:

	Cari Fisher, Attorney-in-Fact	09/11/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)