Zhen Su
CIK 1991642 · View on SEC EDGAR ↗
Insider
First SEC filing: June 22, 2026 · Latest: June 22, 2026
On this page
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 4 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
No open-market trades on record; showing all filings.
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| June 17, 2026 | CTMX | A | 59,000 | — | — | 59,000 Direct | — | Acquired | (price as of 2026-08-19) |
| May 28, 2025 | KPTI | A | 4,600 | — | — | 4,600 Direct | — | Acquired | (price as of 2026-08-19) |
| May 29, 2024 | KPTI | A | 50,587 | — | — | 50,587 Direct | — | Acquired | (price as of 2026-08-19) |
| Aug. 31, 2023 | KPTI | A | 68,000 | — | — | 68,000 Direct | — | Acquired | (price as of 2026-08-19) |
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 |
|---|---|---|---|---|---|---|---|
| June 17, 2026 | CTMX | Stock Option (Right to Buy) | Common Stock (59,000) | $2.96 | June 16, 2036 | 59,000 | Acquired |
| May 28, 2025 | KPTI | Nonstatutory Stock Option (right to buy) | Common Stock | — | May 27, 2035 | 4,600 | Acquired |
| May 29, 2024 | KPTI | Nonstatutory Stock Option (right to buy) | Common Stock (50,587) | $0.96 | May 28, 2034 | 50,587 | Acquired |
| Aug. 31, 2023 | KPTI | Nonstatutory Stock Option (right to buy) | Common Stock (68,000) | $1.28 | Aug. 30, 2033 | 68,000 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).