Summary
Updated Aug 31, 2026
Hardy Louis Griffin III is SVP, HUMAN RESOURCES of INNOSPEC INC. (IOSP). 4 SEC Form 4 filings on record going back to 2025, most recently on 4 March 2026.
Recent Transactions
4Every recent SEC Form 4 transaction Hardy Louis Griffin III has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Hardy Louis Griffin III go back to 2025: 4 primary Form 4 filings, an average of 2.0 per year. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Hardy Louis Griffin III files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- Ian Cleminson - $364K of IOSP open-market activity in the last 12 months
- Milton C. Blackmore - $175K of IOSP open-market activity in the last 12 months
- Larry Padfield - $175K of IOSP open-market activity in the last 12 months
- David Landless - $91K of IOSP open-market activity in the last 12 months
- David B. Jones - $78K of IOSP open-market activity in the last 12 months
- Leslie J. Parrette - $25K of IOSP open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is Hardy Louis Griffin III?
Hardy Louis Griffin III is a corporate insider, tracked as SVP, HUMAN RESOURCES of INNOSPEC INC. (IOSP). InsiderAlpha holds 4 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did Hardy Louis Griffin III last file a Form 4?
The most recent primary Form 4 on record is dated 4 March 2026, one of 4 filings going back to 2025.
Where can I see all of Hardy Louis Griffin III's SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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