// company-profile
Protagonist Therapeutics, Inc
PTGX// activity-summary
Recent insider activity is bullish. Over the last 30 days, 3 insiders purchased shares versus 2 sales. Buying was led by Waddill William D..
// 90-day insight
Over the last 90 days, Protagonist Therapeutics, Inc insiders bought $2.7M (18 transactions) and sold $29.7M (12 transactions).
- Most active insider: Giraudo Bryan with 8 transactions totaling $6.2M.
- Largest single sale: $7.5M by PATEL DINESH V PH D on May 12, 2026.
Activity skews bullish — buys outpace sales.
Institutional Ownership
Top 13F-HR holders of Protagonist Therapeutics, Inc as of 2026-03-31
Data source: SEC Form 13F-HR filings. Joined with insider activity above — see who's loading up institutionally while insiders are trading. Full 13F-HR API →
Insider Transactions
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Jun 10, 2026 | Waddill William D. | PTGX | Sale | 9,000 | $107.68 | $969K |
| Jun 10, 2026 | Waddill William D. | PTGX | Option Exercise10b5 | 6,000 | $16.54 | $99K |
| Jun 10, 2026 | Waddill William D. | PTGX | Option Exercise10b5 | 3,000 | $11.80 | $35K |
| Jun 10, 2026 | Waddill William D. | PTGX | Option Exercise | 3,000 | $0.00 | $0K |
| Jun 10, 2026 | Waddill William D. | PTGX | Option Exercise | 6,000 | $0.00 | $0K |
45 more transactions hidden
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