Newmarket Corporation
A Richmond, Virginia-based holding company that makes chemical additives for fuels and lubricants through its main subsidiary, Afton Chemical — products that help gasoline, diesel, and engine oils run cleaner, longer, and with lower emissions. It began life in 1887 as the Albemarle Paper Manufacturing Company, and in 1962 its leader bought the far larger Ethyl Corporation in a takeover that newspapers dubbed "Jonah Swallows the Whale." The company later took the Ethyl name, then renamed itself NewMarket in 2004 after a reorganization split its businesses apart.
Granted 1.9K · Sold 8.1K
Granted 1.4K · Sold 1.6K
Granted 1.5K
Granted 337
Granted 337
Granted 337
Granted 337 · Bought 400
Granted 415
Granted 36
Granted 337
Granted 30
| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| Gottwald Bruce C10% owner · 6 transactions | — | 926.5K | — | — | — |
| Gottwald Thomas EChairman, President & CEO, Director · 64 transactions | — | 610.3K | 1.9K | — | 8.1K |
| Hazelgrove Bruce R IIIEVP & CAO · 9 transactions | — | 23.3K | 1.4K | — | 1.6K |
| Paliotti Brian DPresident Afton Chemical Corp · 6 transactions | +48.3% | 4.0K | 1.5K | — | — |
| Gambill Mark MDirector · 2 transactions | +9.2% | 4.0Kas of Jul 2025 | 337 | — | — |
| Rogers James EDirector · 2 transactions | +9.9% | 3.7Kas of Jul 2025 | 337 | — | — |
| Harris H Hiter IIIDirector · 2 transactions | +19.3% | 2.1Kas of Jul 2025 | 337 | — | — |
| Skrobacz William JVice President & CFO · 1 transaction | +8.9% | 1.4Kas of Feb 2024 | — | — | — |
| Fitzgerald Timothy KVice President & CFO · 2 transactions | — | 980.24 | — | — | — |
| Xu TingDirector · 4 transactions | +78% | 929 | 337 | 400 | — |
| Jewett Bryce Dickinson IIIEVP and General Counsel · 2 transactions | +157.4% | 810.67 | 415 | — | — |
| Ridgeway GailController · 2 transactions | +21.8% | 594.53as of Mar 2024 | 36 | — | — |
| Ukrop Lowell SimmonsDirector · 2 transactions | — | 337as of Jul 2025 | 337 | — | — |
| Pietrantoni Ann PController · 1 transaction | — | 200.27as of Feb 2025 | 30 | — | — |
Select a row to see that insider’s individual transactions. Sum of the holdings confirmed in the 12 months before this insider's last filing. A Form 4 reports a holding per line — held directly, or through a named trust, partnership or foundation, and in each share class separately — never a person’s total. Lines not restated in that time are left out and shown apart: an active filer restates what they still hold, so a line they did not restate is more often an entity since renamed, whose shares a successor line reports too. An amber marker means some were left out.
Net open-market activity over the last 3 years: -9.3K shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.