---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-24-277254"
form_type: "8-K"
ticker: "NEU"
cik: "0001282637"
company_name: "NEWMARKET CORP"
filed_at: "2024-12-12T23:59:59+00:00"
generated_at: "2026-05-29T03:53:06.059140+00:00"
event_type: "other_material"
sentiment: "positive"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# NewMarket Corp authorizes $500M share repurchase program through Dec 2027

## Summary
- Board approved new $500M buyback program, replacing existing $500M program expiring Dec 31, 2024.
- Repurchases may occur in open market, private transactions, block trades, or Rule 10b5-1 plans.
- Program runs through December 31, 2027; no minimum share purchase obligation.
- Company may terminate or suspend the program at any time.

## SEC filing metadata
- accession: 0001193125-24-277254
- form_type: 8-K
- ticker: NEU
- cik: 0001282637
- company_name: NEWMARKET CORP
- filed_at: 2024-12-12T23:59:59+00:00
- event_type: other_material
- sentiment: positive
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1282637/000119312524277254/0001193125-24-277254-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1282637/000119312524277254/d883521d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-24-277254
- JSON: https://secwatch.observer/filing/0001193125-24-277254.json
- Plain text: https://secwatch.observer/filing/0001193125-24-277254.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.