[Form 4] NEWMARKET CORP Insider Trading Activity

Rhea-AI Filing Summary

NewMarket Corp Chairman, President & CEO Thomas E. Gottwald reported updated holdings in NewMarket common stock. The filing shows a bona fide gift of 1,500 shares, leaving him with 116,635 shares held directly. He also reports indirect interests, including 143,837 shares in a 2025 GRAT and 40,198.84 shares through the NewMarket Savings Plan. Several family trusts for grandchildren now report zero shares after a change in trustees, while other trusts and his spouse continue to hold smaller indirect positions.

Insights

Equity compensation and insider-trading analyst

Routine gift and holdings update, limited signaling value.

Thomas E. Gottwald reported a bona fide gift of 1,500 NewMarket common shares and updated a range of indirect holdings across family trusts, a 2025 GRAT, a savings plan, and shares held by his spouse.

The filing notes that some trusts now show zero shares because he no longer serves as trustee, and that added savings-plan shares result from periodic purchases by the plan trustee. These are administrative and estate‑planning changes rather than open‑market trades, so they carry limited insight into his view of NewMarket’s valuation.

Insider Trade Summary

1,500 shares gifted

Mixed 19 txns

Insider GOTTWALD THOMAS E

Role Chairman, President & CEO

Type	Security	Shares	Price	Value
Gift	Common Stock	1,500	$0.00	--
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 116,635 shares (Direct, null); Common Stock — 5,147 shares (Indirect, Shares held by wife)

Footnotes (1)

1. The reporting person no longer serves as trustee of the applicable trust and therefore will no longer report shares held by the applicable trust. The increase in shares is due to periodic purchases by the Plan Trustee pursuant to the Plan.

Key Figures

Gifted shares: 1,500 shares Direct holdings after gift: 116,635 shares 2025 GRAT holdings: 143,837 shares +3 more

6 metrics

Gifted shares 1,500 shares Bona fide gift of NewMarket common stock

Direct holdings after gift 116,635 shares Common stock held directly following the reported gift

2025 GRAT holdings 143,837 shares Indirect interest via 2025 GRAT

Savings Plan holdings 40,198.84 shares Indirect interest via NewMarket Savings Plan

Co-trustee children trust 6,889 shares Indirect holdings as co-trustee for children

Spouse-held shares 5,147 shares Indirect interest in shares held by wife

Key Terms

bona fide gift, 2025 GRAT, NewMarket Savings Plan, Plan Trustee, +1 more

5 terms

bona fide gift financial

"transaction_code_description": "Bona fide gift""

A bona fide gift is a genuine, voluntary transfer of money, property, or benefits from one party to another made without expectation of repayment, services, or hidden conditions. Investors care because such gifts can affect company disclosures, related‑party transaction rules, tax treatment, and perceived conflicts of interest; think of it like someone giving you a present with no strings attached — but on a corporate scale, auditors and regulators need to verify it really is unconditional.

2025 GRAT financial

"nature_of_ownership": "2025 GRAT""

NewMarket Savings Plan financial

"nature_of_ownership": "NewMarket Savings Plan""

Plan Trustee financial

"periodic purchases by the Plan Trustee pursuant to the Plan"

trustee financial

"no longer serves as trustee of the applicable trust"

A trustee is a person or institution legally appointed to hold and manage assets or enforce an agreement on behalf of other people (beneficiaries). Think of a trustee as a neutral referee or custodian who must act in the beneficiaries’ best interests, follow the trust or contract rules, and handle distributions, recordkeeping and enforcement. Investors care because a trustworthy trustee protects their rights, ensures promised payments or remedies are delivered, and can influence recoveries if things go wrong.

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Form 4 Insider Transactions: What Each Field Means →

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^*

GOTTWALD THOMAS E

(Last) (First) (Middle)

330 SOUTH FOURTH STREET

(Street)

RICHMOND VIRGINIA 23219

(City) (State) (Zip)

UNITED STATES

(Country)

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

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

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chairman, President & CEO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/04/2026

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	06/04/2026		G		1,500	D	$0.00	116,635	D
Common Stock								5,147	I	Shares held by wife
Common Stock								0(1)	I	Shares held as trustee for grandchild (trust 1)
Common Stock								0(1)	I	Shares held as trustee for grandchild (trust 2)
Common Stock								1,830	I	Shares held as trustee for grandchild (trust 3)
Common Stock								0(1)	I	Shares held as trustee for grandchild (trust 4)
Common Stock								1,436	I	Shares held as trustee for grandchild (trust 5)
Common Stock								1,186	I	Shares held as trustee for grandchild (trust 6)
Common Stock								1,164	I	Shares held as trustee for grandchild (trust 7)
Common Stock								807	I	Shares held as trustee for grandchild (trust 8)
Common Stock								618	I	Shares held as trustee for grandchild (trust 9)
Common Stock								0(1)	I	Shares held as trustee for grandchild (trust 10)
Common Stock								363	I	Shares held as trustee for grandchild (trust 11)
Common Stock								378	I	Shares held as trustee for grandchild (trust 12)
Common Stock								363	I	Shares held as trustee for grandchild (trust 13)
Common Stock								40,198.84(2)	I	NewMarket Savings Plan
Common Stock								46,407	I	Shares held as co-trustee fbo (among others reporting Floyd D. Gottwald)
Common Stock								6,889	I	Shares held as co-trustee fbo children dtd. 12/16/1991
Common Stock								143,837	I	2025 GRAT

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 reporting person no longer serves as trustee of the applicable trust and therefore will no longer report shares held by the applicable trust.

2. The increase in shares is due to periodic purchases by the Plan Trustee pursuant to the Plan.

	/s/ Anne-Marie Anderson, (by Power of Attorney for Thomas E. Gottwald)	06/08/2026
	** 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)