Summary
Updated Aug 30, 2026
Steven S. Williamson is PRESIDENT AND CEO of Pulmonx Corp (LUNG). 2 SEC Form 4 filings on record, most recently on 2 September 2025. Most recent open-market trade: sold $7K of LUNG on 2 September 2025. Lifetime open-market sales: $46K.
Recent Transactions
4Every recent SEC Form 4 transaction Steven S. Williamson 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 Steven S. Williamson 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.
- Glendon E. French III - $198K of LUNG open-market activity in the last 12 months
- David Aaron Lehman - $72K of LUNG open-market activity in the last 12 months
- Geoffrey Beran Rose - $44K of LUNG open-market activity in the last 12 months
- Srikanth Radhakrishnan - $37K of LUNG open-market activity in the last 12 months
- Mehul Joshi - $13K of LUNG 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 Steven S. Williamson?
Steven S. Williamson is a corporate insider, tracked as PRESIDENT AND CEO of Pulmonx Corp (LUNG). InsiderAlpha holds 2 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did Steven S. Williamson last file a Form 4?
The most recent primary Form 4 on record is dated 2 September 2025, one of 2 filings going back to 2025.
Has Steven S. Williamson been buying or selling stock?
Recorded transactions: 0 open-market purchases and 4 open-market sales ($46K) across all tracked filings.
Where can I see all of Steven S. Williamson'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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