Chaitan Khosla PHD
CIK 1135139 · View on SEC EDGAR ↗
Insider
First SEC filing: Aug. 10, 2016 · Latest: Aug. 10, 2016
On this page
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 11 non-open-market transactions below
last 12 months, based on the transactions shown below
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
11 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Aug. 11, 2020 | PTGX | S 10b5-1 | 2,499 | $17.19 | $42,958 | 0 Direct | -100.00% | Disposed | 783.4% (price as of 2026-08-21) |
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Derivative holdings (Form 4 Table II)
Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| Aug. 11, 2020 | PTGX | Stock Option (right to buy) | Common Stock (2,499) | $1.89 | Oct. 22, 2024 | 2,499 | Disposed |
| May 28, 2020 | PTGX | Stock Option (right to buy) | Common Stock (15,000) | $16.54 | May 27, 2030 | 15,000 | Acquired |
| Aug. 15, 2019 | PTGX | Stock Option (right to buy) | Common Stock (5,000) | $9.99 | Aug. 14, 2029 | 5,000 | Acquired |
| June 7, 2019 | PTGX | Stock Option (right to buy) | Common Stock (12,000) | $11.80 | June 6, 2029 | 12,000 | Acquired |
| May 29, 2018 | PTGX | Stock Option (right to buy) | Common Stock (12,000) | $6.98 | May 28, 2028 | 12,000 | Acquired |
| May 15, 2018 | PTGX | Stock Option (right to buy) | Common Stock (3,000) | $6.45 | May 14, 2028 | 3,000 | Acquired |
| May 25, 2017 | PTGX | Stock Option (right to buy) | Common Stock (12,000) | $8.59 | May 25, 2027 | 12,000 | Acquired |
| Sept. 13, 2016 | PTGX | Stock Option (right to buy) [F1] | Common Stock (5,000) | $12.88 | Sept. 13, 2026 | 5,000 | Acquired |
| Sept. 13, 2016 | PTGX | Stock Option (right to buy) | Common Stock (24,000) | $12.88 | Sept. 13, 2026 | 24,000 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 3 holdings
Securities held when first becoming an insider, per SEC Form 3.