Lewis T. Williams
Director · Protagonist Therapeutics, Inc
IndividualSelling only
- 2026
- Feb 18, 2026
- 1
Filings (90d)
Other insiders active in the same stocks
Insiders who reported open-market trades in the last 12 months at the companies Lewis T. Williams 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.
- Dinesh V. Ph D. Patel - $60.58M in PTGX purchases and sales in the last 12 months
- Asif Ali - $15.63M in PTGX purchases and sales in the last 12 months
- Bryan Giraudo - $5.92M in PTGX purchases and sales in the last 12 months
- William D. Waddill - $4.60M in PTGX purchases and sales in the last 12 months
- Arturo Md Molina - $4.49M in PTGX purchases and sales in the last 12 months
- Harold E. Selick - $2.52M in PTGX purchases and sales in the last 12 months
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Frequently asked questions
Who is Lewis T. Williams?
Lewis T. Williams is a corporate insider, tracked as Director of Protagonist Therapeutics, Inc (PTGX). InsiderAlpha holds 1 primary Form 4 filing for them, the earliest from 2026, updated as new SEC EDGAR filings are processed.
When did Lewis T. Williams last file a Form 4?
The only primary Form 4 on record is dated 18 February 2026.
Has Lewis T. Williams been buying or selling stock?
Recorded transactions: 0 open-market purchases and 1 open-market sale ($1.48M) across all tracked filings.
