Insider at

04

Insider transactions

05
0 buys (P) 0 sells (S) Net: $0 + 13 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.

DateTickerCodeSharesPriceValue Owned afterΔ ownA/Dvs now
June 10, 2026 CTKB M 43,973 · · 0 Direct -100.00% Disposed (price as of 2026-10-02)
June 10, 2026 CTKB A 18,261 · · 18,261 Direct · Acquired (price as of 2026-10-02)
June 10, 2026 CTKB A 33,333 · · 33,333 Direct · Acquired (price as of 2026-10-02)
June 10, 2026 CTKB M 43,973 · · 59,679 Direct +279.98% Acquired (price as of 2026-10-02)
June 18, 2025 CTKB A 43,973 · · 43,973 Direct · Acquired (price as of 2026-10-02)
June 18, 2025 CTKB A 23,809 · · 23,809 Direct · Acquired (price as of 2026-10-02)
June 5, 2025 CTKB M 15,706 · · 15,706 Direct · Acquired (price as of 2026-10-02)
June 5, 2025 CTKB M 15,706 · · 0 Direct -100.00% Disposed (price as of 2026-10-02)
June 5, 2024 CTKB A 15,706 · · 15,706 Direct · Acquired (price as of 2026-10-02)
June 5, 2024 CTKB A 23,076 · · 23,076 Direct · Acquired (price as of 2026-10-02)
June 14, 2023 CTKB A 30,242 · · 30,242 Direct · Acquired (price as of 2026-10-02)
June 1, 2022 CTKB A 25,789 · · 25,789 Direct · Acquired (price as of 2026-10-02)
Dec. 31, 2021 CTKB A 28,598 · · 28,598 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.

06
DateTickerSecurityUnderlying Exercise priceExpirationSharesA/D
June 10, 2026 CTKB Restricted Stock Units Common Stock (43,973) · · 43,973 Disposed
June 10, 2026 CTKB Director Stock Option (right to buy) Common Stock (18,261) $4.05 June 10, 2036 18,261 Acquired
June 10, 2026 CTKB Restricted Stock Units Common Stock (33,333) · · 33,333 Acquired
June 18, 2025 CTKB Restricted Stock Units Common Stock (43,973) · · 43,973 Acquired
June 18, 2025 CTKB Director Stock Option (right to buy) Common Stock (23,809) $3.07 June 18, 2035 23,809 Acquired
June 5, 2025 CTKB Restricted Stock Units Common Stock (15,706) · · 15,706 Disposed
June 5, 2024 CTKB Restricted Stock Units Common Stock (15,706) · · 15,706 Acquired
June 5, 2024 CTKB Stock Option (right to buy) Common Stock (23,076) $5.73 June 5, 2034 23,076 Acquired
June 14, 2023 CTKB Stock Option (right to buy) Common Stock (30,242) $8.38 June 14, 2033 30,242 Acquired
June 1, 2022 CTKB Stock Option (right to buy) Common Stock (25,789) $9.67 June 1, 2032 25,789 Acquired
Dec. 31, 2021 CTKB Stock Option (Right to Buy) Common Stock (28,598) $16.32 Dec. 31, 2031 28,598 Acquired

Exercise/conversion price is blank when not applicable (e.g. RSUs).