Other Information
−Removed: During the quarter ended September 30, 2025, no director or officer (as defined in Rule 16a-1(f) under the Exchange Act) of NewMarket Corporation adopted or terminated a "Rule 10b5-1 trading arrangement" or "non-Rule 10b5-1 trading arrangement," as each term is defined in Item 408(a) or Regulation S-K.
+Added: During the quarter ended March 31, 2026, no director or officer (as defined in Rule 16a-1(f) under the Exchange Act) of NewMarket Corporation adopted or terminated a "Rule 10b5-1 trading arrangement" or "non-Rule 10b5-1 trading arrangement," as each term is defined in Item 408(a) or Regulation S-K.
Articles of Incorporation Amended and Restated effective April 27, 2012 (incorporated by reference to Exhibit 3.1 to Form 8-K (File No.
16 unchanged sentences
NEWMARKET CORPORATION
−Removed: October 31, 2025 By:
+Added: April 23, 2026 By:
/s/ Timothy K.
2 unchanged sentences
(Principal Financial Officer)
−Removed: October 31, 2025 By:
+Added: April 23, 2026 By:
(Principal Accounting Officer)
Compared sentence by sentence after normalising whitespace, quotation marks, case and digits, so re-formatting and restated figures do not read as changed language. Wording changes appear as one removal and one addition. The current filing and the prior one are authoritative.