[Form 4] Simpson Manufacturing Co., Inc. Insider Trading Activity

Rhea-AI Filing Summary

On 1 Aug 2025 F5, Inc. (FFIV) EVP Global Services & Strategy Thomas D. Fountain reported the vesting of 3,001 Restricted Stock Units (RSUs) under previously granted service-based awards (Nov-22, Nov-23 and Nov-24 grants). The RSUs converted to common stock at $0 exercise price (Code M).

To cover statutory tax withholdings, 1,615 shares were automatically surrendered at $313.42 per share (Code F), leaving a net increase of 1,386 shares in Fountain’s direct holdings. His direct ownership now totals 22,046 common shares.

The filing also shows Fountain retains 8,555 unvested RSUs that continue to vest quarterly through 2027, assuming ongoing employment. No open-market sales or purchases occurred beyond the tax-related share surrender, making this a routine executive vesting event with limited market impact.

Positive

• Net increase of 1,386 shares indicates continued insider equity exposure.
• 8,555 unvested RSUs keep executive incentives aligned with shareholder interests.

Negative

• 1,615 shares surrendered at $313.42 for tax withholding, slightly increasing share float.

Insights

Financial Analyst

TL;DR: Routine RSU vesting; small net share gain, negligible market impact.

The transaction merely converts previously granted compensation into equity, reflecting standard quarterly vesting. Cashless tax withholding reduced the gross 3,001-share issuance to a 1,386-share net addition, lifting Fountain’s stake to 22,046 shares. The sale portion was automatic and not an open-market disposition, so signaling value is minimal. With 8,555 RSUs still outstanding, incentive alignment remains intact. Overall impact on float, supply–demand dynamics, and insider sentiment is neutral.

Corporate Governance Expert

TL;DR: Executive equity alignment maintained; no red flags.

Consistent quarter-on-quarter vesting supports long-term incentive structures. The absence of discretionary sales suggests the executive did not actively divest beyond obligatory withholding. Remaining RSU inventory continues to tie compensation to shareholder value creation. Governance best practices are followed, and no compliance issues are evident. Impact is classified as not impactful for investors.

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

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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^*

Gilstrap Jeremy

(Last) (First) (Middle)

5956 W. LAS POSITAS BLVD

(Street)

PLEASANTON CA 94588

(City) (State) (Zip)

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

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP, Innovation

3. Date of Earliest Transaction (Month/Day/Year)
08/01/2025

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

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

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

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	08/01/2025		S		2,500	D	$178.27(1)	7,794(2)	D
Common Stock								1,244	I	By Trust (PSP)(3)

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 $178.23 to $178.53, 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.

3. The shares are owned by the Simpson Manufacturing Co., Inc. Profit Sharing Plan for Salaried Employees (the "Plan") of which the reporting person is a participant. The Plan qualifies under sections 401(a)(26) and 410 of the Internal Revenue Code.

Remarks:

	Cari Fisher, Attorney-in-Fact	08/04/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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