# EDGAR Filing Document

**Accession Number:** 0001282637
**File Stem:** 0001193125-25-175561
**Filing Date:** 2025-8
**Character Count:** 9008
**Document Hash:** 878d254fab7a0f80e9c21c57ec39dd20
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-175561.hdr.sgml**: 20250807

**ACCESSION NUMBER**: 0001193125-25-175561

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 13

**CONFORMED PERIOD OF REPORT**: 20250807

**ITEM INFORMATION**: Other Events

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20250807

**DATE AS OF CHANGE**: 20250807

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** NEWMARKET CORP
- **CENTRAL INDEX KEY:** 0001282637
- **STANDARD INDUSTRIAL CLASSIFICATION:** INDUSTRIAL ORGANIC CHEMICALS [2860]
- **ORGANIZATION NAME:** 08 Industrial Applications and Services
- **EIN:** 000000000
- **STATE OF INCORPORATION:** VA
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-32190
- **FILM NUMBER:** 251195233

**BUSINESS ADDRESS:**
- **STREET 1:** 330 S FOURTH ST
- **STREET 2:** PO BOX 2189
- **CITY:** RICHMOND
- **STATE:** VA
- **ZIP:** 23218-2189
- **BUSINESS PHONE:** 804-788-5000

**MAIL ADDRESS:**
- **STREET 1:** 330 S FOURTH ST
- **STREET 2:** PO BOX 2189
- **CITY:** RICHMOND
- **STATE:** VA
- **ZIP:** 23218-2189

?xml version='1.0' encoding='ASCII'? 8-K

### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549

### FORM 8-K

#### CURRENT REPORT

#### Pursuant to Section 13 or 15(d)

#### of The Securities Exchange Act of 1934

#### Date of Report (Date of earliest event reported): August 7, 2025

## NEWMARKET CORPORATION

#### (Exact name of registrant as specified in its charter)

---

| | | |
|:---|:---|:---|
| **Virginia** | **1-32190** | **20-0812170** |
| **(State or other jurisdiction**<br> **of incorporation)** | **(Commission**<br> **File Number)** | **(IRS Employer**<br> **Identification No.)** |

---

---

| | |
|:---|:---|
| **330 South Fourth Street,**<br> **Richmond, Virginia** | **23219** |
| **(Address of principal executive offices)** | **(Zip Code)** |

---

#### Registrant's telephone number, including area code: (804) 788-5000

#### Not applicable

#### (Former name or former address, if changed since last report.)
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

---

| | | |
|:---|:---|:---|
| **Title of each class** | **Trading**<br> **Symbol(s)** | **Name of each exchange**<br> **on which registered** |
| Common Stock, without par value | NEU | New York Stock Exchange |

---

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 or Rule 12b-2 of the Securities Exchange Act of 1934.

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

------

---

| | |
|:---|:---|
| **Item 8.01** | **Other Events.**  |

---

On August 7, 2025, NewMarket Corporation (the "Company") issued a press release reporting that the Company's Board of Directors had declared a dividend of $2.75 per share of the Company's common stock, payable on October 1, 2025, to Company shareholders of record at the close of business on September 15, 2025. A copy of this press release is attached hereto as Exhibit 99.1 and incorporated herein by reference.

---

| | |
|:---|:---|
| **Item 9.01** | **Financial Statements and Exhibits.**  |

---

(d) Exhibits.

---

| | |
|:---|:---|
| Exhibit 99.1 | [Press release regarding the quarterly dividend issued by the Company on August 7, 2025](d21648dex991.htm) |
| Exhibit 104 | Cover Page Interactive Data File (Embedded within the inline XBRL document) |

---

------

#### SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: August 7, 2025

---

| | |
|:---|:---|
| NewMarket Corporation | NewMarket Corporation |
| By: | /s/ Timothy K. Fitzgerald |
| Name: | Timothy K. Fitzgerald |
| Title: | Vice President and Chief Financial Officer |

---

## Exhibit 99.1

**Exhibit 99.1** 

**NEWMARKET CORPORATION ANNOUNCES QUARTERLY DIVIDEND** 

Richmond, VA, August 7, 2025 - The Board of Directors of NewMarket Corporation (NYSE: NEU) declared a quarterly dividend in the amount of $2.75 per share on the common stock of the Corporation. The dividend is payable October 1, 2025, to NewMarket shareholders of record at the close of business on September 15, 2025.

NewMarket Corporation is a holding company operating through its subsidiaries, Afton Chemical Corporation (Afton), Ethyl Corporation (Ethyl), and American Pacific Corporation (AMPAC). The Afton and Ethyl companies develop, manufacture, blend, and deliver chemical additives that enhance the performance of petroleum products. AMPAC is a manufacturer of specialty materials primarily used in solid rocket motors for the aerospace and defense industries. The NewMarket family of companies has a long-term commitment to its people, to safety, to providing innovative solutions for its customers, and to making the world a better place.

Some of the information contained in this press release constitutes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Although NewMarket's management believes its expectations are based on reasonable assumptions within the bounds of its knowledge of its business and operations, there can be no assurance that actual results will not differ materially from expectations.

Factors that could cause actual results to differ materially from expectations include, but are not limited to, the availability of raw materials and distribution systems; disruptions at production facilities, including single-sourced facilities; hazards common to chemical businesses; the ability to respond effectively to technological changes in our industries; failure to protect our intellectual property rights; sudden, sharp, or prolonged raw material price increases; competition from other manufacturers; current and future governmental regulations; the loss of significant customers; termination or changes to contracts with contractors and subcontractors of the U.S. government or directly with the U.S. government; failure to attract and retain a highly-qualified workforce; an information technology system failure or security breach; the occurrence or threat of extraordinary events, including natural disasters, terrorist attacks, wars and health-related epidemics; risks related to operating outside of the United States, including tariffs and trade policy; political, economic, and regulatory factors concerning our products; the impact of substantial indebtedness on our operational and financial flexibility; the impact of fluctuations in foreign exchange rates; resolution of environmental liabilities or legal proceedings; limitation of our insurance coverage; our inability to realize expected benefits from investment in our infrastructure or from acquisitions, or our inability to successfully integrate acquisitions into our business; the underperformance of our pension assets resulting in additional cash contributions to our pension plans; and other factors detailed from time to time in the reports that NewMarket files with the Securities and Exchange Commission, including the risk factors in Part I, Item 1A. "Risk Factors" of our Annual Report on Form 10-K for the year ended December 31, 2024, which is available to shareholders upon request.

------

You should keep in mind that any forward-looking statement made by NewMarket in the foregoing discussion speaks only as of the date on which such forward-looking statement is made. New risks and uncertainties arise from time to time, and it is impossible for us to predict these events or how they may affect us. We have no duty to, and do not intend to, update or revise the forward-looking statements in this discussion after the date hereof, except as may be required by law. In light of these risks and uncertainties, you should keep in mind that the events described in any forward-looking statement made in this discussion, or elsewhere, might not occur.

**CONTACTS:** 

**Timothy K. Fitzgerald** 

**Investor Relations** 

**Phone: 804.788.5555** 

**Email: <u>investorrelations@newmarket.com</u>**