Kleanthis Gabriel Xanthopoulos
Insider
First SEC filing: March 16, 2026 · Latest: March 16, 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
No open-market trades on record; showing all filings.
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Sept. 30, 2026 | CNTB | A | 5,000 | · | · | 91,554 Direct | +5.78% | Acquired | (price as of 2026-10-02) |
| June 30, 2026 | CNTB | A | 3,738 | · | · | 86,554 Direct | +4.51% | Acquired | (price as of 2026-10-02) |
| March 31, 2026 | CNTB | A | 2,816 | · | · | 82,816 Direct | +3.52% | 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.
Initial ownership (Form 3) 8 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| March 16, 2026 | CNTB | Ordinary Shares | 80,000 | Direct |
| March 16, 2026 | CNTB | Stock Option (Right to Buy) | 89,220 | Direct |
| March 16, 2026 | CNTB | Stock Option (Right to Buy) | 21,269 | Direct |
| March 16, 2026 | CNTB | Stock Option (Right to Buy) | 28,359 | Direct |
| March 16, 2026 | CNTB | Stock Option (Right to Buy) | 33,540 | Direct |
| March 16, 2026 | CNTB | Stock Option (Right to Buy) | 46,512 | Direct |
| March 16, 2026 | CNTB | Stock Option (Right to Buy) | 60,000 | Direct |
| March 16, 2026 | CNTB | Stock Option (Right to Buy) | 60,000 | Direct |