Insider · CIK 0001475714
Lewis T Williams
Files at PTGX (Protagonist Therapeutics, Inc). First filing Feb 18, 2026, latest Feb 18, 2026.
Lewis T Williams files SEC Form 4 as director at PTGX (Protagonist Therapeutics, Inc). Since Feb 18, 2026, Lewis T Williams has reported 0 open-market buys worth $0 and 1 open-market sell worth $1.5M, the latest filed on Feb 18, 2026.
A track record needs three past buys with six months of prices behind them; Lewis T Williams has 0, so none is measured yet.
The newest scored trade: sold $1.5M of PTGX on Feb 17, 2026, filed Feb 18, 2026, scored 53 (moderate). In the last 12 months: 0 buys worth $0 and 1 sell worth $1.5M.
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
PTGX: Protagonist Therapeutics, Inc
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 53Moderate | Protagonist Therapeutics, Inc | $1.5M 18,000 shares | -70% | +135% from low-14% from high |
Transactions
Every row this insider has filed, 5 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Feb 17, 2026 | PTGX Protagonist Therapeutics, Inc | MOption exercise Common Stock | +18,000 | $10.84 | $195k | 25,825 | Feb 18, 2026 |
| Feb 17, 2026 | PTGX Protagonist Therapeutics, Inc | SOpen-market sale Common Stock | -18,000 | $82.42 | $1.5M | 7,825 | Feb 18, 2026 |
| Feb 17, 2026 | PTGX Protagonist Therapeutics, Inc | MOption exercise Stock Option (right to buy)derivative | +18,000 | $0.00 | $0 | 6,000 | Feb 18, 2026 |
| Jan 2, 2026 | PTGX Protagonist Therapeutics, Inc | AGrant or award Common Stock | +2,695 | $0.00 | $0 | 7,825 | Jan 6, 2026 |
| Jan 2, 2026 | PTGX Protagonist Therapeutics, Inc | AGrant or award Stock Option (right to buy)derivative | +3,762 | $0.00 | $0 | 3,762 | Jan 6, 2026 |
Questions about Lewis T Williams
Answered from the filings on this page, as of the latest one.
Is Lewis T Williams buying or selling?
In the last 12 months Lewis T Williams reported 0 open-market buys worth $0 and 1 open-market sell worth $1.5M on SEC Form 4; the latest was sold $1.5M of PTGX on Feb 17, 2026. Grants, option exercises and tax withholding are not counted.
How did Lewis T Williams's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Lewis T Williams has 0.
Where does Lewis T Williams file Form 4?
Lewis T Williams has filed Form 4 at PTGX (Protagonist Therapeutics, Inc). A Form 4 is required of officers, directors and holders of more than 10% of a share class within two business days of a trade.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.