Summary
Updated Aug 30, 2026
William Porteous files SEC Form 4 reports at Spire Global, Inc. (SPIR). 7 SEC Form 4 filings on record going back to 2024, most recently on 17 July 2026.
Recent Transactions
7Every recent SEC Form 4 transaction William Porteous has reported, most recent first.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies William Porteous 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.
- Peter Platzer - $3.63M of SPIR open-market activity in the last 12 months
- Theresa Condor - $2.31M of SPIR open-market activity in the last 12 months
- Perez Celia Pelez - $315K of SPIR open-market activity in the last 12 months
- Alison K. Engel - $303K of SPIR open-market activity in the last 12 months
- Stephen Messer - $253K of SPIR open-market activity in the last 12 months
- Johann Gabriel Oehme - $210K of SPIR 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 William Porteous?
William Porteous is a corporate insider of Spire Global, Inc. (SPIR). InsiderAlpha holds 7 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has William Porteous submitted recently?
2 primary Form 4 filings in the last 90 days, covering 1 company.
Where can I see all of William Porteous'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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