Wenbin Jiang
CIK 1872873 · View on SEC EDGAR ↗
Insider
First SEC filing: July 22, 2021 · Latest: July 22, 2021
On this page
- Insider at Companies where this person is a reporting insider.
- Insider transactions Every share this person bought or sold, from Form 4 filings.
- Derivatives Options and other derivative holdings reported by this person.
- Initial holdings The stakes this person held when they first started reporting.
- Compensation Executive pay disclosed in company proxy statements.
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 42 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
42 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Nov. 7, 2023 | CTKB | S 10b5-1 | 20,000 | $4.34 | $86,800 | 5,275,796 Direct | -0.38% | Disposed | 9.0% (price as of 2026-08-20) |
| Oct. 9, 2023 | CTKB | S 10b5-1 | 20,000 | $5.33 | $106,600 | 5,295,796 Direct | -0.38% | Disposed | -11.3% (price as of 2026-08-20) |
| Sept. 7, 2023 | CTKB | S 10b5-1 | 20,000 | $6.83 | $136,600 | 7,605,796 Direct | -0.26% | Disposed | -30.7% (price as of 2026-08-20) |
| Aug. 7, 2023 | CTKB | S 10b5-1 | 20,000 | $9.04 | $180,800 | 7,613,467 Direct | -0.26% | Disposed | -47.7% (price as of 2026-08-20) |
| July 7, 2023 | CTKB | S 10b5-1 | 20,000 | $8.48 | $169,600 | 7,633,467 Direct | -0.26% | Disposed | -44.2% (price as of 2026-08-20) |
| June 7, 2023 | CTKB | S 10b5-1 | 20,000 | $8.23 | $164,600 | 7,653,467 Direct | -0.26% | Disposed | -42.5% (price as of 2026-08-20) |
| May 8, 2023 | CTKB | S 10b5-1 | 20,000 | $11.55 | $231,000 | 7,664,439 Direct | -0.26% | Disposed | -59.0% (price as of 2026-08-20) |
| April 10, 2023 | CTKB | S 10b5-1 | 20,000 | $8.88 | $177,600 | 7,684,439 Direct | -0.26% | Disposed | -46.7% (price as of 2026-08-20) |
| March 7, 2023 | CTKB | S 10b5-1 | 20,000 | $10.13 | $202,600 | 7,704,439 Direct | -0.26% | Disposed | -53.3% (price as of 2026-08-20) |
| Feb. 7, 2023 | CTKB | S 10b5-1 | 20,000 | $13.19 | $263,800 | 7,720,314 Direct | -0.26% | Disposed | -64.1% (price as of 2026-08-20) |
| Jan. 9, 2023 | CTKB | S 10b5-1 | 20,000 | $10.66 | $213,200 | 7,740,314 Direct | -0.26% | Disposed | -55.6% (price as of 2026-08-20) |
| Dec. 7, 2022 | CTKB | S 10b5-1 | 20,000 | $11.86 | $237,200 | 7,760,314 Direct | -0.26% | Disposed | -60.1% (price as of 2026-08-20) |
| Nov. 7, 2022 | CTKB | S 10b5-1 | 20,000 | $14.76 | $295,200 | 7,785,820 Direct | -0.26% | Disposed | -68.0% (price as of 2026-08-20) |
| Oct. 7, 2022 | CTKB | S 10b5-1 | 20,000 | $14.79 | $295,800 | 7,805,820 Direct | -0.26% | Disposed | -68.0% (price as of 2026-08-20) |
| Sept. 7, 2022 | CTKB | S 10b5-1 | 20,000 | $12.89 | $257,800 | 7,825,820 Direct | -0.25% | Disposed | -63.3% (price as of 2026-08-20) |
| Aug. 8, 2022 | CTKB | S 10b5-1 | 20,000 | $15.09 | $301,800 | 7,841,541 Direct | -0.25% | Disposed | -68.7% (price as of 2026-08-20) |
| July 7, 2022 | CTKB | S 10b5-1 | 20,000 | $11.19 | $223,800 | 7,861,541 Direct | -0.25% | Disposed | -57.7% (price as of 2026-08-20) |
| June 7, 2022 | CTKB | S 10b5-1 | 20,000 | $10.75 | $215,000 | 7,881,541 Direct | -0.25% | Disposed | -56.0% (price as of 2026-08-20) |
| May 9, 2022 | CTKB | S 10b5-1 | 20,000 | $8.01 | $160,200 | 7,896,040 Direct | -0.25% | Disposed | -40.9% (price as of 2026-08-20) |
| April 7, 2022 | CTKB | S 10b5-1 | 20,000 | $10.54 | $210,800 | 7,916,040 Direct | -0.25% | Disposed | -55.1% (price as of 2026-08-20) |
| March 7, 2022 | CTKB | S 10b5-1 | 18,800 | $12.58 | $236,504 | 7,937,240 Direct | -0.24% | Disposed | -62.4% (price as of 2026-08-20) |
| March 7, 2022 | CTKB | S 10b5-1 | 1,200 | $13.79 | $16,548 | 7,936,040 Direct | -0.02% | Disposed | -65.7% (price as of 2026-08-20) |
| Feb. 7, 2022 | CTKB | S 10b5-1 | 20,000 | $14.40 | $288,000 | 7,889,375 Direct | -0.25% | Disposed | -67.2% (price as of 2026-08-20) |
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 |
|---|---|---|---|---|---|---|---|
| Nov. 18, 2023 | CTKB | Restricted Stock Units | Common Stock (11,781) | — | — | 11,781 | Disposed |
| Nov. 18, 2023 | CTKB | Restricted Stock Units | Common Stock (6,758) | — | — | 6,758 | Disposed |
| Aug. 18, 2023 | CTKB | Restricted Stock Units | Common Stock (11,781) | — | — | 11,781 | Disposed |
| Aug. 18, 2023 | CTKB | Restricted Stock Units | Common Stock (6,758) | — | — | 6,758 | Disposed |
| May 18, 2023 | CTKB | Restricted Stock Units | Common Stock (7,854) | — | — | 7,854 | Disposed |
| May 18, 2023 | CTKB | Restricted Stock Units | Common Stock (6,758) | — | — | 6,758 | Disposed |
| March 3, 2023 | CTKB | Restricted Stock Units | Common Stock (188,501) | — | — | 188,501 | Acquired |
| March 3, 2023 | CTKB | Employee Stock Option (Right to Buy) | Common Stock (284,900) | $10.61 | March 3, 2033 | 284,900 | Acquired |
| Feb. 21, 2023 | CTKB | Restricted Stock Units | Common Stock (6,758) | — | — | 6,758 | Disposed |
| Nov. 18, 2022 | CTKB | Restricted Stock Units | Common Stock (6,758) | — | — | 6,758 | Disposed |
| Aug. 18, 2022 | CTKB | Restricted Stock Units | Common Stock (6,758) | — | — | 6,758 | Disposed |
| May 18, 2022 | CTKB | Restricted Stock Units | Common Stock (9,011) | — | — | 9,011 | Disposed |
| March 4, 2022 | CTKB | Stock Option (Right to Buy) | Common Stock (66,665) | $0.25 | June 28, 2022 | 66,665 | Disposed |
| Feb. 28, 2022 | CTKB | Restricted Stock Units | Common Stock (108,137) | — | — | 108,137 | Acquired |
| Feb. 28, 2022 | CTKB | Stock Option (Right to Buy) | Common Stock (163,158) | $13.64 | Feb. 28, 2032 | 163,158 | Acquired |
| July 22, 2021 | CTKB | Series A Preferred Stock | Common Stock (2,666,600) | — | — | 2,666,600 | Disposed |
| July 22, 2021 | CTKB | Stock Option (Right to Buy) | Common Stock (250,000) | $17.00 | July 22, 2031 | 250,000 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 4 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| July 22, 2021 | CTKB | Common Stock | 7,847,710 | Direct |
| July 22, 2021 | CTKB | Series A Preferred Stock→ Common Stock (2,666,600) | 2,666,600 | Indirect |
| July 22, 2021 | CTKB | Stock Option (Right to Buy)→ Common Stock (66,665) | 66,665 | Direct |
| July 22, 2021 | CTKB | Stock Option (Right to Buy)→ Common Stock (106,664) | 106,664 | Direct |
Compensation (DEF 14A)
Matched by name from proxy statements (DEF 14A) — verify against the filing.
CTKB
CEO| Fiscal year | Salary | Bonus | Stock awards | Option awards | Non-equity incentive | Pension change | Other | Total |
|---|---|---|---|---|---|---|---|---|
| 2025 | $620,000 | — | $2,000,000 | $2,000,000 | $485,211 | — | $14,850 | $5,120,061 |
| 2024 | $599,083 | — | $2,499,994 | $2,499,996 | $472,677 | — | $12,921 | $6,084,671 |
| 2023 | $578,000 | — | — | $2,000,000 | $311,378 | — | $49,864 | $4,939,242 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.