Summary
Updated Aug 31, 2026
Richard Ian Griffiths is 10% Owner of Silence Therapeutics plc (SLN). 8 SEC Form 4 filings on record going back to 2025, most recently on 13 August 2026.
Trading Pattern
InsiderAlpha's records for Richard Ian Griffiths go back to 2025: 8 primary Form 4 filings, an average of 4.0 per year. Sales side: 19 recorded sales totaling , so the filing history runs sell-heavy by dollar value. 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 Sector
No other insider has filed at Richard Ian Griffiths's companies, so these are insiders reporting open-market trades at other companies in the same sector.
- General Atlantic (ALN HLTH), L.P. - $315.49M of ALHC open-market activity in the last 12 months
- GENERAL ATLANTIC, L.P. - $315.49M of ALHC open-market activity in the last 12 months
- Fairmount Funds Management LLC - $300.01M of ORKA open-market activity in the last 12 months
- August J. Troendle - $249.99M of MEDP open-market activity in the last 12 months
- A/S Genmab - $234.86M of MRUS open-market activity in the last 12 months
- Weiss Asset Management LP - $233.35M of AVDL 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 Richard Ian Griffiths?
Richard Ian Griffiths is a corporate insider, tracked as 10% Owner of Silence Therapeutics plc (SLN). InsiderAlpha holds 8 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Richard Ian Griffiths submitted recently?
2 primary Form 4 filings in the last 90 days, covering 1 company.
Has Richard Ian Griffiths been buying or selling stock?
Recorded transactions: 13 open-market purchases and 19 open-market sales across all tracked filings.
Where can I see all of Richard Ian Griffiths'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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