NewMarket Corp (NEU) officer reports initial tiny stake on Form 3

Rhea-AI Filing Summary

NewMarket Corp principal accounting officer Susan M. Ridlehoover filed an initial ownership report on Form 3. The filing shows an indirect holding of 0.8139 shares of NewMarket common stock through the NewMarket Savings Plan, reflecting a very small beneficial stake reported under company benefit arrangements.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider RIDLEHOOVER SUSAN M

Role PRINCIPAL ACCOUNTING OFFICER

Type	Security	Shares	Price	Value
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 0.8139 shares (Indirect, NewMarket Savings Plan)

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Accepted by SEC EDGAR 02/20/2026 - 04:45 PM Learn about SEC filing dates

FAQ

What does NewMarket Corp (NEU) insider Susan Ridlehoover report on this Form 3?

Susan M. Ridlehoover reports her initial beneficial ownership as principal accounting officer, showing 0.8139 shares of NewMarket common stock. These shares are held indirectly through the NewMarket Savings Plan, providing transparency about her small equity interest as an executive of the company.

How many NewMarket Corp (NEU) shares does Susan Ridlehoover indirectly own?

Susan Ridlehoover indirectly owns 0.8139 shares of NewMarket common stock. The position is held through the NewMarket Savings Plan, indicating participation in an employer-related savings or retirement plan rather than a large personal trading position in the company’s stock.

What is the nature of ownership reported by Susan Ridlehoover in NEU stock?

The ownership reported by Susan Ridlehoover is indirect, classified under the NewMarket Savings Plan. This means the 0.8139 NewMarket common shares are credited to her within a company savings arrangement, rather than being directly held in a personal brokerage or trading account.

Does this NewMarket Corp (NEU) Form 3 show any insider buying or selling?

The Form 3 does not indicate any explicit buying or selling activity. It records Susan Ridlehoover’s beneficial ownership position of 0.8139 common shares held indirectly through the NewMarket Savings Plan, serving as an initial disclosure of her equity stake as a company officer.

What role does Susan Ridlehoover hold at NewMarket Corp (NEU) in this filing?

Susan M. Ridlehoover is identified as an officer of NewMarket Corp, serving as principal accounting officer. Her Form 3 filing reports a small indirect ownership of 0.8139 common shares through the NewMarket Savings Plan, aligning with disclosure requirements for company officers.

SEC Form 3

FORM 3

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

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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:			3235-0104
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

RIDLEHOOVER SUSAN M

(Last) (First) (Middle)

330 SOUTH 4TH STREET

(Street)

RICHMOND VA 23219

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
02/18/2026

3. Issuer Name and Ticker or Trading Symbol
NEWMARKET CORP [ NEU ]

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	PRINCIPAL ACCOUNTING OFFICER

5. 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 Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	0.8139	I	NewMarket Savings Plan

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

	/s/ Anne-Marie Anderson (by Power of Attorney for Susan M. Ridlehoover	02/20/2026
	** 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 5 (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.