Insider at

04

Insider transactions

05
0 buys (P) 0 sells (S) Net: $0 + 5 non-open-market transactions below 12 months to the week close of 2026-10-23

Price change vs the latest weekly close (updated to the current quote in your browser when available), 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
Feb. 19, 2026 CBOE M 355 $286.17 $101,590 637 Direct +125.89% Acquired 19.0% (price as of )
Feb. 19, 2026 CBOE F 123 $286.17 $35,199 514 Direct -19.31% Disposed 19.0% (price as of )
Feb. 19, 2026 CBOE M 355 · · 711 Direct -33.30% Disposed
Feb. 19, 2026 CBOE A 3,495 · · 3,495 Direct · Acquired
Oct. 20, 2025 CBOE A 1,066 · · 1,066 Direct · Acquired

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
Feb. 19, 2026 CBOE Restricted Stock Units Common Stock (355) · · 355 Disposed
Feb. 19, 2026 CBOE Restricted Stock Units Common Stock (3,495) · · 3,495 Acquired
Oct. 20, 2025 CBOE Restricted Stock Units Common Stock (1,066) · · 1,066 Acquired

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

Initial ownership (Form 3) 1 holding

07

Securities held when first becoming an insider, per SEC Form 3.

DateTickerSecuritySharesOwnership
Oct. 10, 2025 CBOE Common Stock 282 Direct