Christopher A Isaacson
CIK 1538451 · View on SEC EDGAR ↗
Insider
First SEC filing: Feb. 23, 2026 · Latest: Feb. 23, 2026
On this page
Insider transactions
0 buys (P)
1 sells (S)
Net:
$-1,183,300
+ 85 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
85 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Sept. 2, 2025 | CBOE | S 10b5-1 | 5,000 | $236.66 | $1,183,300 | 37,580 Direct | -11.74% | Disposed | 29.5% (price as of 2026-08-25) |
| June 9, 2025 | CBOE | S 10b5-1 | 5,000 | $221.37 | $1,106,850 | 42,580 Direct | -10.51% | Disposed | 38.4% (price as of 2026-08-25) |
| Sept. 3, 2024 | CBOE | S 10b5-1 | 6,000 | $204.89 | $1,229,340 | 39,855 Direct | -13.08% | Disposed | 49.5% (price as of 2026-08-25) |
| June 21, 2024 | CBOE | S 10b5-1 | 6,000 | $175.00 | $1,050,000 | 51,855 Direct | -10.37% | Disposed | 75.1% (price as of 2026-08-25) |
| Dec. 1, 2023 | CBOE | S 10b5-1 | 3,850 | $182.23 | $701,586 | 45,102 Direct | -7.86% | Disposed | 68.1% (price as of 2026-08-25) |
| Sept. 1, 2023 | CBOE | S 10b5-1 | 3,850 | $149.08 | $573,958 | 54,599 Direct | -6.59% | Disposed | 105.5% (price as of 2026-08-25) |
| June 5, 2023 | CBOE | S 10b5-1 | 3,850 | $133.98 | $515,823 | 61,349 Direct | -5.90% | Disposed | 128.7% (price as of 2026-08-25) |
| Nov. 5, 2021 | CBOE | S 10b5-1 | 1,385 | $132.24 | $183,152 | 52,048 Direct | -2.59% | Disposed | 131.7% (price as of 2026-08-25) |
| Nov. 5, 2021 | CBOE | S 10b5-1 | 615 | $132.94 | $81,758 | 51,433 Direct | -1.18% | Disposed | 130.5% (price as of 2026-08-25) |
| Aug. 20, 2021 | CBOE | S 10b5-1 | 800 | $128.26 | $102,608 | 58,133 Direct | -1.36% | Disposed | 138.9% (price as of 2026-08-25) |
| Aug. 20, 2021 | CBOE | S 10b5-1 | 1,600 | $129.21 | $206,736 | 56,533 Direct | -2.75% | Disposed | 137.1% (price as of 2026-08-25) |
| Aug. 20, 2021 | CBOE | S 10b5-1 | 100 | $129.92 | $12,992 | 56,433 Direct | -0.18% | Disposed | 135.8% (price as of 2026-08-25) |
| May 14, 2021 | CBOE | S 10b5-1 | 1,577 | $113.58 | $179,116 | 59,856 Direct | -2.57% | Disposed | 169.7% (price as of 2026-08-25) |
| May 14, 2021 | CBOE | S 10b5-1 | 623 | $114.45 | $71,302 | 59,233 Direct | -1.04% | Disposed | 167.7% (price as of 2026-08-25) |
| May 14, 2021 | CBOE | S 10b5-1 | 300 | $115.24 | $34,572 | 58,933 Direct | -0.51% | Disposed | 165.9% (price as of 2026-08-25) |
Showing latest 100 of 190 transactions
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 |
|---|---|---|---|---|---|---|---|
| Feb. 19, 2026 | CBOE | Restricted Stock Units | Common Stock (2,488) | — | — | 2,488 | Disposed |
| Feb. 19, 2026 | CBOE | Restricted Stock Units | Common Stock (1,674) | — | — | 1,674 | Disposed |
| Feb. 19, 2026 | CBOE | Restricted Stock Units | Common Stock (1,486) | — | — | 1,486 | Disposed |
| Feb. 19, 2026 | CBOE | Restricted Stock Units | Common Stock (313) | — | — | 313 | Disposed |
| July 15, 2025 | CBOE | Restricted Stock Units | Common Stock (940) | — | — | 940 | Acquired |
| Feb. 19, 2025 | CBOE | Restricted Stock Units | Common Stock (2,581) | — | — | 2,581 | Disposed |
| Feb. 19, 2025 | CBOE | Restricted Stock Units | Common Stock (2,487) | — | — | 2,487 | Disposed |
| Feb. 19, 2025 | CBOE | Restricted Stock Units | Common Stock (1,674) | — | — | 1,674 | Disposed |
| Feb. 19, 2025 | CBOE | Restricted Stock Units | Common Stock (4,459) | — | — | 4,459 | Acquired |
| Feb. 19, 2024 | CBOE | Restricted Stock Units | Common Stock (3,552) | — | — | 3,552 | Disposed |
| Feb. 19, 2024 | CBOE | Restricted Stock Units | Common Stock (2,581) | — | — | 2,581 | Disposed |
| Feb. 19, 2024 | CBOE | Restricted Stock Units | Common Stock (2,487) | — | — | 2,487 | Disposed |
| Feb. 19, 2024 | CBOE | Restricted Stock Units | Common Stock (5,022) | — | — | 5,022 | Acquired |
| Feb. 19, 2024 | CBOE | Restricted Stock Units | Common Stock (1,340) | — | — | 1,340 | Acquired |
| Feb. 19, 2023 | CBOE | Restricted Stock Units | Common Stock (2,366) | — | — | 2,366 | Disposed |
| Feb. 19, 2023 | CBOE | Restricted Stock Units | Common Stock (3,551) | — | — | 3,551 | Disposed |
| Feb. 19, 2023 | CBOE | Restricted Stock Units | Common Stock (2,580) | — | — | 2,580 | Disposed |
| Feb. 19, 2023 | CBOE | Restricted Stock Units | Common Stock (7,462) | — | — | 7,462 | Acquired |
| Feb. 19, 2022 | CBOE | Restricted Stock Units | Common Stock (2,193) | — | — | 2,193 | Disposed |
| Feb. 19, 2022 | CBOE | Restricted Stock Units | Common Stock (2,365) | — | — | 2,365 | Disposed |
| Feb. 19, 2022 | CBOE | Restricted Stock Units | Common Stock (3,551) | — | — | 3,551 | Disposed |
| Feb. 19, 2022 | CBOE | Restricted Stock Units | Common Stock (7,742) | — | — | 7,742 | Acquired |
| Feb. 19, 2021 | CBOE | Restricted Stock Units | Common Stock (923) | — | — | 923 | Disposed |
| Feb. 19, 2021 | CBOE | Restricted Stock Units | Common Stock (2,193) | — | — | 2,193 | Disposed |
| Feb. 19, 2021 | CBOE | Restricted Stock Units | Common Stock (2,365) | — | — | 2,365 | Disposed |
| Feb. 19, 2021 | CBOE | Restricted Stock Units | Common Stock (10,654) | — | — | 10,654 | Acquired |
| Feb. 28, 2020 | CBOE | Restricted Stock Units | Common Stock (1,037) | — | — | 1,037 | Disposed |
| Feb. 28, 2020 | CBOE | Restricted Stock Units | Common Stock (6,219) | — | — | 6,219 | Disposed |
| Feb. 19, 2020 | CBOE | Restricted Stock Units | Common Stock (923) | — | — | 923 | Disposed |
| Feb. 19, 2020 | CBOE | Restricted Stock Units | Common Stock (2,193) | — | — | 2,193 | Disposed |
| Feb. 19, 2020 | CBOE | Restricted Stock Units | Common Stock (7,096) | — | — | 7,096 | Acquired |
| Nov. 15, 2019 | CBOE | Stock Option | Common Stock (10,000) | $22.08 | Jan. 31, 2020 | 10,000 | Disposed |
| Aug. 15, 2019 | CBOE | Stock Option | Common Stock (10,000) | $22.08 | Jan. 31, 2020 | 10,000 | Disposed |
| May 29, 2019 | CBOE | Stock Option | Common Stock (10,000) | $22.08 | Jan. 31, 2020 | 10,000 | Disposed |
| Feb. 28, 2019 | CBOE | Restricted Stock Units | Common Stock (1,037) | — | — | 1,037 | Disposed |
| Feb. 28, 2019 | CBOE | Restricted Stock Units | Common Stock (1,037) | — | — | 1,037 | Disposed |
| Feb. 19, 2019 | CBOE | Restricted Stock Units | Common Stock (922) | — | — | 922 | Disposed |
| Feb. 19, 2019 | CBOE | Restricted Stock Units | Common Stock (6,579) | — | — | 6,579 | Acquired |
| Nov. 27, 2018 | CBOE | Stock Option | Common Stock (8,719) | $22.08 | Jan. 31, 2020 | 8,719 | Disposed |
| Aug. 30, 2018 | CBOE | Stock Option | Common Stock (8,720) | $22.08 | Jan. 31, 2020 | 8,720 | Disposed |
| June 6, 2018 | CBOE | Stock Option | Common Stock (8,720) | $22.08 | Jan. 31, 2020 | 8,720 | Disposed |
| Feb. 28, 2018 | CBOE | Restricted Stock Units | Common Stock (1,036) | — | — | 1,036 | Disposed |
| Feb. 19, 2018 | CBOE | Restricted Stock Units | Common Stock (2,768) | — | — | 2,768 | Acquired |
| Dec. 1, 2017 | CBOE | Stock Option | Common Stock (7,019) | $12.63 | April 30, 2019 | 7,019 | Disposed |
| Sept. 1, 2017 | CBOE | Stock Option | Common Stock (7,020) | $12.63 | April 30, 2019 | 7,020 | Disposed |
| Feb. 28, 2017 | CBOE | Restricted Stock Units | Common Stock (6,219) | — | — | 6,219 | Acquired |
| Feb. 28, 2017 | CBOE | Restricted Stock Units | Common Stock (3,110) | — | — | 3,110 | Acquired |
| Feb. 28, 2017 | CBOE | Stock Option [F6] | Common Stock (14,039) | $12.63 | April 30, 2019 | 14,039 | Acquired |
| Feb. 28, 2017 | CBOE | Stock Option [F6] | Common Stock (56,159) | $22.08 | Jan. 31, 2020 | 56,159 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).