Luke Nathaniel Walker
Insider
First SEC filing: June 18, 2026 · Latest: June 18, 2026
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net: $0
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| June 24, 2026 | CNTX | A | 45,000 | · | · | 45,000 Direct | · | Acquired | (price as of 2026-10-02) |
| June 16, 2026 | ZNTL | A | 57,100 | · | · | 201,384 Direct | +39.57% | Acquired | (price as of 2026-10-02) |
| June 17, 2025 | ZNTL | A | 57,603 | · | · | 144,284 Direct | +66.45% | Acquired | (price as of 2026-10-02) |
| June 12, 2025 | CNTX | A | 123,500 | · | · | 123,500 Direct | · | Acquired | (price as of 2026-10-02) |
| Jan. 31, 2025 | ZNTL | P | 14,200 | $1.76 | $24,992 | 86,681 Direct | +19.59% | Acquired | 43.2% (price as of 2026-10-02) |
| Sept. 4, 2024 | CNTX | A | 19,315 | · | · | 19,315 Direct | · | Acquired | (price as of 2026-10-02) |
| May 24, 2024 | ZNTL | A | 72,481 | · | · | 72,481 Direct | · | Acquired | (price as of 2026-10-02) |
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 24, 2026 | CNTX | Stock Option (right to buy) | Common Stock | $0.58 | June 23, 2036 | 45,000 | Acquired |
| June 12, 2025 | CNTX | Stock Option (right to buy) | Common Stock | $0.65 | June 11, 2035 | 123,500 | Acquired |
| Sept. 4, 2024 | CNTX | Stock Option (right to buy) | Common Stock | $2.43 | Sept. 3, 2034 | 19,315 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).