Protagonist Therapeutics, Inc 4

William D. Waddill exercised 9,000 stock options at $11.80 and sold 9,000 Protagonist Therapeutics (PTGX) common shares at $99.64 on May 29, 2026 under a 10b5-1 plan.

On May 29, 2026, reporting person William D. Waddill, an insider of Protagonist Therapeutics, Inc., exercised 9,000 stock options at $11.80 per share and received 9,000 shares of common stock, then immediately sold 9,000 shares of common stock at an average price of $99.64 per share under a pre-arranged Rule 10b5-1 trading plan adopted on February 27, 2026. The option exercise appears to have been non-cash (exercise price effectively $0.00 in the derivative table, with the $11.80 strike shown separately), and the subsequent sale monetized the shares obtained from the exercise. After these transactions, Waddill held 7,825 shares of common stock directly. The options exercised were fully vested, and this sequence reflects a routine exercise-and-sell transaction rather than an open-market purchase.

Filing Facts

CIK

1377121

Ticker

PTGX

Form

4

Source Type

sec

Accession

0001104659-26-069047

Alert Tier

6