Updated Jul 16, 2026 · Last SEC filing 2026-06-25
Protagonist Therapeutics, Inc (PTGX) has filed 8 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-06-25. 2 Form 8-K material event filings were reported by PTGX in the last 90 days. 8 Form 144 notices of proposed sale were filed for PTGX stock. InsiderAlpha tracks every PTGX SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.
| SIC classification | Pharmaceutical Preparations (SIC 2834) |
|---|---|
| SEC CIK | 0001377121 |
| Form 4 filings (90d) | 8 |
|---|---|
| Form 8-K filings (90d) | 2 |
| Form 144 notices (90d) | 8 |
| Latest Form 4 filing | 2026-06-25 |
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Waddill William D. | Director | M — Option exercise | 9.0K | $16.54 | $149K | SEC | |
| Waddill William D. | Director | S — Open-market sale | 9.0K | $117.94 | $1.06M | SEC | |
| Waddill William D. | Director | S — Open-market sale | 9.0K | $107.68 | $969K | SEC | |
| Waddill William D. | Director | M — Option exercise | 3.0K | $11.80 | $35K | SEC | |
| Waddill William D. | Director | M — Option exercise | 6.0K | $16.54 | $99K | SEC | |
| Waddill William D. | Director | M — Option exercise | 9.0K | $11.80 | $106K | SEC | |
| Waddill William D. | Director | S — Open-market sale | 9.0K | $99.64 | $897K | SEC | |
| PATEL DINESH V PH D | President and CEO | S — Open-market sale | 75.0K | $100.12 | $7.51M | SEC | |
| PATEL DINESH V PH D | President and CEO | M — Option exercise | 75.0K | $21.58 | $1.62M | SEC | |
| PATEL DINESH V PH D | President and CEO | S — Open-market sale | 75.0K | $100.12 | $7.51M | SEC | |
| PATEL DINESH V PH D | President and CEO | M — Option exercise | 75.0K | $21.58 | $1.62M | SEC | |
| Giraudo Bryan | Director | S — Open-market sale | 5.1K | $100.00 | $513K | SEC | |
| Giraudo Bryan | Director | S — Open-market sale | 6.0K | $100.00 | $600K | SEC | |
| Giraudo Bryan | Director | S — Open-market sale | 36.0K | $100.14 | $3.61M | SEC | |
| Giraudo Bryan | Director | M — Option exercise | 24.0K | $6.45 | $155K | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for Protagonist Therapeutics, Inc (PTGX). Updated in real time as new filings are submitted to the SEC.
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| Waddill William D. | 11 | $3.32M |
| Giraudo Bryan | 8 | $6.16M |
| PATEL DINESH V PH D | 7 | $18.25M |
| Ali Asif | 1 | $185K |
Form 144 must be filed before insiders sell restricted or control stock above SEC thresholds. A cluster of Form 144 notices often precedes a wave of insider distribution.
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in PTGX insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
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