Reported relationships
Latest disclosed role at each company.
| Company | Last reported as | Report date | Published |
|---|---|---|---|
| MARKETAXESS HOLDINGS INCMKTX · Entity 3821 | Director | September 08, 2025 | September 09, 2025 |
Disclosed balances
About these balances
Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.
MARKETAXESS HOLDINGS INC
Report date September 08, 2025 · Filed September 09, 2025
| Security / award | Ownership account | Disclosed shares / units | Disclosure context |
|---|---|---|---|
| Common Stock, par value $0.003 per shareSEC Table I · non-derivative | IndirectBy family trust | 43,208 |
Reported balance
After 2025-09-08 transaction · row 1
Account identity is unresolved; indirect or unspecified ownership is not merged.
1 source rowRow 1 · 2025-09-08 · Sale · Disposed 1,600 · Balance 43,208 |
| Common Stock, par value $0.003 per shareSEC Table I · non-derivative | Direct | 9,985 |
Reported balance
Holding disclosure · report date 2025-09-08 · row 2
Holding and transaction disclosures are not merged.
1 source rowRow 2 · Balance 9,985 |
Transaction history
JSON APIPurchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”
The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.
| Transaction date | Company | Activity / security | Shares / units | Reported price | Reported value | Details |
|---|---|---|---|---|---|---|
| September 08, 2025 Filed Sep 9, 2025 17:15 UTC | MARKETAXESS HOLDINGS INC MKTX · Entity 3821 | SaleCommon Stock, par value $0.003 per share | 1,600 | $186.59 | $298,544.00 |
DisclosureSEC source: 0000950170-25-113836 · ownership.xml · nonDerivative · entry 1 Casper Stephen P · CIK 0001296969 · Director 10b5-1 filing: No plan indicated Ownership: Indirect · By family trust Disclosed balance after: 43,208 Read SEC document |
| June 04, 2025 Filed Jun 5, 2025 16:22 UTC | MARKETAXESS HOLDINGS INC MKTX · Entity 3821 | GrantCommon Stock, par value $0.003 per share | 784 | $0.00 | $0.00 |
DisclosureSEC source: 0000950170-25-082359 · ownership.xml · nonDerivative · entry 1 Casper Stephen P · CIK 0001296969 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 9,985 F1 · price: Represents a grant of restricted stock units pursuant to the Company's 2020 Equity Incentive Plan. Read SEC document |
| September 06, 2024 Filed Sep 9, 2024 16:15 UTC | MARKETAXESS HOLDINGS INC MKTX · Entity 3821 | SaleCommon Stock, par value $0.003 per share | 1,000 | $259.39 | $259,390.00 |
DisclosureSEC source: 0000950170-24-104748 · ownership.xml · nonDerivative · entry 1 Casper Stephen P · CIK 0001296969 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 9,201 Read SEC document |
| June 07, 2024 Filed Jun 11, 2024 16:15 UTC | MARKETAXESS HOLDINGS INC MKTX · Entity 3821 | SaleCommon Stock, par value $0.003 per share | 500 | $199.48 | $99,740.00 |
DisclosureSEC source: 0000950170-24-071911 · ownership.xml · nonDerivative · entry 1 Casper Stephen P · CIK 0001296969 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 10,201 Read SEC document |
| June 05, 2024 Filed Jun 7, 2024 16:15 UTC | MARKETAXESS HOLDINGS INC MKTX · Entity 3821 | GrantCommon Stock, par value $0.003 per share | 781 | $0.00 | $0.00 |
DisclosureSEC source: 0000950170-24-070659 · ownership.xml · nonDerivative · entry 1 Casper Stephen P · CIK 0001296969 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 10,701 F1 · price: Represents a grant of restricted stock pursuant to the Company's 2020 Equity Incentive Plan. Read SEC document |
| August 28, 2023 Filed Aug 29, 2023 16:15 UTC | MARKETAXESS HOLDINGS INC MKTX · Entity 3821 | GiftCommon Stock, par value $0.003 per share | 200 | $0.00 | $0.00 |
DisclosureSEC source: 0001209191-23-047587 · doc4.xml · nonDerivative · entry 1 Casper Stephen P · CIK 0001296969 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 9,920 F1 · kind: The transaction reported involved a gift by the reporting person of 200 shares of Common Stock to a charitable donor advised fund. Read SEC document |
| June 07, 2023 Filed Jun 9, 2023 16:20 UTC | MARKETAXESS HOLDINGS INC MKTX · Entity 3821 | GrantCommon Stock, par value $0.003 per share | 581 | $0.00 | $0.00 |
DisclosureSEC source: 0001209191-23-035823 · doc4.xml · nonDerivative · entry 1 Casper Stephen P · CIK 0001296969 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 10,120 F1 · price: Represents a grant of restricted stock pursuant to the Company's 2020 Equity Incentive Plan. Read SEC document |
| June 08, 2022 Filed Jun 10, 2022 16:30 UTC | MARKETAXESS HOLDINGS INC MKTX · Entity 3821 | GrantCommon Stock, par value $0.003 per share | 586 | $0.00 | $0.00 |
DisclosureSEC source: 0001209191-22-035911 · doc4.xml · nonDerivative · entry 1 Casper Stephen P · CIK 0001296969 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 9,539 F1 · price: Represents a grant of restricted stock pursuant to the Company's 2020 Equity Incentive Plan. Read SEC document |
| August 01, 2021 Filed Aug 3, 2021 16:05 UTC | MARKETAXESS HOLDINGS INC MKTX · Entity 3821 | GrantCommon Stock, par value $0.003 per share | 353 | $0.00 | $0.00 |
DisclosureSEC source: 0001209191-21-049271 · doc4.xml · nonDerivative · entry 1 Casper Stephen P · CIK 0001296969 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 8,953 F1 · price: Represents a grant of restricted stock pursuant to the Company's 2020 Equity Incentive Plan. Read SEC document |
| March 11, 2021 Filed Mar 12, 2021 16:35 UTC | MARKETAXESS HOLDINGS INC MKTX · Entity 3821 | GiftCommon Stock, par value $0.003 per share | 2,000 | $0.00 | $0.00 |
DisclosureSEC source: 0001209191-21-020180 · doc4.xml · nonDerivative · entry 2 Casper Stephen P · CIK 0001296969 · Director 10b5-1 filing: Not disclosed Ownership: Indirect · By family trust Disclosed balance after: 44,808 Read SEC document |
| March 11, 2021 Filed Mar 12, 2021 16:35 UTC | MARKETAXESS HOLDINGS INC MKTX · Entity 3821 | GiftCommon Stock, par value $0.003 per share | 2,000 | $0.00 | $0.00 |
DisclosureSEC source: 0001209191-21-020180 · doc4.xml · nonDerivative · entry 1 Casper Stephen P · CIK 0001296969 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 8,600 Read SEC document |
| December 15, 2020 Filed Dec 16, 2020 16:30 UTC | MARKETAXESS HOLDINGS INC MKTX · Entity 3821 | SaleCommon Stock, par value $0.003 per share | 750 | $554.96 | $416,220.00 |
DisclosureSEC source: 0001209191-20-063792 · doc4.xml · nonDerivative · entry 1 Casper Stephen P · CIK 0001296969 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 10,600 F1 · price: The transactions were executed in multiple trades at prices ranging from $554.84 to $555.09. The price above reflects the weighted average sales price. Detailed information regarding the number of shares sold at each separate price will be provided upon request by the Commission staff, the Issuer or a security holder of the Issuer. Read SEC document |
| August 27, 2020 Filed Aug 28, 2020 16:30 UTC | MARKETAXESS HOLDINGS INC MKTX · Entity 3821 | SaleCommon Stock, par value $0.003 per share | 500 | $500.00 | $250,000.00 |
DisclosureSEC source: 0001209191-20-048634 · doc4.xml · nonDerivative · entry 1 Casper Stephen P · CIK 0001296969 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 11,350 Read SEC document |
| June 11, 2020 Filed Jun 15, 2020 17:00 UTC | MARKETAXESS HOLDINGS INC MKTX · Entity 3821 | GrantCommon Stock, par value $0.003 per share | 283 | $0.00 | $0.00 |
DisclosureSEC source: 0001209191-20-036651 · doc4.xml · nonDerivative · entry 1 Casper Stephen P · CIK 0001296969 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 11,850 F1 · price: Represents a grant of restricted stock pursuant to the Company's 2020 Equity Incentive Plan. Read SEC document |
| May 05, 2020 Filed May 7, 2020 16:07 UTC | MARKETAXESS HOLDINGS INC MKTX · Entity 3821 | SaleCommon Stock, par value $0.003 per share | 200 | $480.98 | $96,196.00 |
DisclosureSEC source: 0001209191-20-027647 · doc4.xml · nonDerivative · entry 4 Casper Stephen P · CIK 0001296969 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 11,567 Read SEC document |
| May 05, 2020 Filed May 7, 2020 16:07 UTC | MARKETAXESS HOLDINGS INC MKTX · Entity 3821 | SaleCommon Stock, par value $0.003 per share | 1,400 | $479.86 | $671,804.00 |
DisclosureSEC source: 0001209191-20-027647 · doc4.xml · nonDerivative · entry 3 Casper Stephen P · CIK 0001296969 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 11,767 F1 · price: The transaction was executed in multiple trades at prices ranging from $479.26 to $480.00. The price above reflects the weighted average sales price. Detailed information regarding the number of shares sold at each separate price will be provided upon request by the Commission staff, the Issuer or a security holder of the Issuer. Read SEC document |
| May 05, 2020 Filed May 7, 2020 16:07 UTC | MARKETAXESS HOLDINGS INC MKTX · Entity 3821 | SaleCommon Stock, par value $0.003 per share | 200 | $477.84 | $95,568.00 |
DisclosureSEC source: 0001209191-20-027647 · doc4.xml · nonDerivative · entry 2 Casper Stephen P · CIK 0001296969 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 13,167 Read SEC document |
| May 05, 2020 Filed May 7, 2020 16:07 UTC | MARKETAXESS HOLDINGS INC MKTX · Entity 3821 | SaleCommon Stock, par value $0.003 per share | 200 | $476.53 | $95,306.00 |
DisclosureSEC source: 0001209191-20-027647 · doc4.xml · nonDerivative · entry 1 Casper Stephen P · CIK 0001296969 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 13,367 Read SEC document |
| September 03, 2019 Filed Sep 5, 2019 16:15 UTC | MARKETAXESS HOLDINGS INC MKTX · Entity 3821 | SaleCommon Stock, par value $0.003 per share | 1,000 | $402.82 | $402,820.10 |
DisclosureSEC source: 0001209191-19-048498 · doc4.xml · nonDerivative · entry 1 Casper Stephen P · CIK 0001296969 · Director 10b5-1 filing: Not disclosed Ownership: Indirect · By family trust Disclosed balance after: 42,808 F1 · price: The transaction was executed in multiple trades at prices ranging from $402.5622 to $403.2185. The price above reflects the weighted average sales price. Detailed information regarding the number of shares sold at each separate price will be provided upon request by the Commission staff, the Issuer or a security holder of the Issuer. Read SEC document |
| July 30, 2019 Filed Aug 1, 2019 16:13 UTC | MARKETAXESS HOLDINGS INC MKTX · Entity 3821 | GrantCommon Stock, par value $0.003 per share | 380 | $0.00 | $0.00 |
DisclosureSEC source: 0001209191-19-044013 · doc4.xml · nonDerivative · entry 1 Casper Stephen P · CIK 0001296969 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 13,567 F1 · price: Represents a grant of restricted stock pursuant to the Company's 2012 Incentive Plan. F2 · balance_after: The total number of shares reported as beneficially owned by Mr. Casper has been adjusted to correct an error in Mr. Casper's previously filed form. Read SEC document |
| June 07, 2019 Filed Jun 10, 2019 17:19 UTC | MARKETAXESS HOLDINGS INC MKTX · Entity 3821 | Exercise / conversionStock Option (right to buy) · Derivative | 3,187 | $0.00 Strike: $10.77 | $0.00 |
DisclosureSEC source: 0001209191-19-035878 · doc4.xml · derivative · entry 4 Casper Stephen P · CIK 0001296969 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 0 Underlying: Common Stock · 3,187 shares Expires 2019-07-30 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · derivative.exercise_date: The stock options were fully exercisable. Read SEC document |
| June 07, 2019 Filed Jun 10, 2019 17:19 UTC | MARKETAXESS HOLDINGS INC MKTX · Entity 3821 | SaleCommon Stock, par value $0.003 per share | 102 | $337.30 | $34,404.92 |
DisclosureSEC source: 0001209191-19-035878 · doc4.xml · nonDerivative · entry 2 Casper Stephen P · CIK 0001296969 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 13,055 Read SEC document |
| June 07, 2019 Filed Jun 10, 2019 17:19 UTC | MARKETAXESS HOLDINGS INC MKTX · Entity 3821 | Exercise / conversionCommon Stock, par value $0.003 per share | 3,187 | $10.77 | $34,323.99 |
DisclosureSEC source: 0001209191-19-035878 · doc4.xml · nonDerivative · entry 1 Casper Stephen P · CIK 0001296969 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 13,157 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. Read SEC document |
| December 12, 2018 Filed Feb 6, 2019 16:15 UTC | MARKETAXESS HOLDINGS INC MKTX · Entity 3821 | GiftCommon Stock, par value $0.003 per share | 43,808 | $0.00 | $0.00 |
DisclosureSEC source: 0001012975-19-000129 · edgar.xml · nonDerivative · entry 2 Casper Stephen P · CIK 0001296969 · Director 10b5-1 filing: Not disclosed Ownership: Indirect · By family trust Disclosed balance after: 43,808 Read SEC document |
| December 12, 2018 Filed Feb 6, 2019 16:15 UTC | MARKETAXESS HOLDINGS INC MKTX · Entity 3821 | GiftCommon Stock, par value $0.003 per share | 43,808 | $0.00 | $0.00 |
DisclosureSEC source: 0001012975-19-000129 · edgar.xml · nonDerivative · entry 1 Casper Stephen P · CIK 0001296969 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 9,970 Read SEC document |
| August 08, 2018 Filed Aug 10, 2018 16:10 UTC | MARKETAXESS HOLDINGS INC MKTX · Entity 3821 | GrantCommon Stock, par value $0.003 per share | 702 | $0.00 | $0.00 |
DisclosureSEC source: 0001012975-18-000990 · edgar.xml · nonDerivative · entry 1 Casper Stephen P · CIK 0001296969 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 53,778 F1 · price: Represents a grant of restricted stock pursuant to the Company's 2012 Incentive Plan. Read SEC document |
| November 29, 2017 Filed Nov 30, 2017 16:06 UTC | MARKETAXESS HOLDINGS INC MKTX · Entity 3821 | Exercise / conversionStock Option (right to buy) · Derivative | 4,225 | $0.00 Strike: $9.72 | $0.00 |
DisclosureSEC source: 0001012975-17-000880 · edgar.xml · derivative · entry 3 Casper Stephen P · CIK 0001296969 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 0 Underlying: Common Stock · 4,225 shares Expires 2018-08-01 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F2 · derivative.exercise_date: The stock options were fully exercisable. Read SEC document |
| November 29, 2017 Filed Nov 30, 2017 16:06 UTC | MARKETAXESS HOLDINGS INC MKTX · Entity 3821 | SaleCommon Stock, par value $0.003 per share | 2,000 | $195.84 | $391,682.20 |
DisclosureSEC source: 0001012975-17-000880 · edgar.xml · nonDerivative · entry 2 Casper Stephen P · CIK 0001296969 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 53,076 F1 · price: The transaction was executed in multiple trades at prices ranging from $195.655 to $196.13. The price above reflects the weighted average transaction price. Detailed information regarding the number of shares transacted at each separate price will be provided upon request by the Commission staff, the Issuer or a security holder of the Issuer. Read SEC document |
| November 29, 2017 Filed Nov 30, 2017 16:06 UTC | MARKETAXESS HOLDINGS INC MKTX · Entity 3821 | Exercise / conversionCommon Stock, par value $0.003 per share | 4,225 | $9.72 | $41,067.00 |
DisclosureSEC source: 0001012975-17-000880 · edgar.xml · nonDerivative · entry 1 Casper Stephen P · CIK 0001296969 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 55,076 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. Read SEC document |
| August 10, 2017 Filed Aug 14, 2017 16:17 UTC | MARKETAXESS HOLDINGS INC MKTX · Entity 3821 | GrantCommon Stock, par value $0.003 per share | 617 | $0.00 | $0.00 |
DisclosureSEC source: 0001012975-17-000607 · edgar.xml · nonDerivative · entry 1 Casper Stephen P · CIK 0001296969 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 50,851 F1 · price: Represents a grant of restricted stock pursuant to the Company's 2012 Incentive Plan. Read SEC document |
| May 17, 2017 Filed May 18, 2017 16:08 UTC | MARKETAXESS HOLDINGS INC MKTX · Entity 3821 | Exercise / conversionEmployee Stock Option (right to buy) · Derivative | 2,500 | $0.00 Strike: $16.99 | $0.00 |
DisclosureSEC source: 0001012975-17-000445 · edgar.xml · derivative · entry 3 Casper Stephen P · CIK 0001296969 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 0 Underlying: Common Stock · 2,500 shares Expires 2017-08-03 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · derivative.exercise_date: The employee stock option was fully exercisable. Read SEC document |
| May 17, 2017 Filed May 18, 2017 16:08 UTC | MARKETAXESS HOLDINGS INC MKTX · Entity 3821 | SaleCommon Stock, par value $0.003 per share | 230 | $184.70 | $42,481.00 |
DisclosureSEC source: 0001012975-17-000445 · edgar.xml · nonDerivative · entry 2 Casper Stephen P · CIK 0001296969 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 50,234 Read SEC document |
| May 17, 2017 Filed May 18, 2017 16:08 UTC | MARKETAXESS HOLDINGS INC MKTX · Entity 3821 | Exercise / conversionCommon Stock, par value $0.003 per share | 2,500 | $16.99 | $42,475.00 |
DisclosureSEC source: 0001012975-17-000445 · edgar.xml · nonDerivative · entry 1 Casper Stephen P · CIK 0001296969 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 50,464 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. Read SEC document |
| December 29, 2016 Filed Dec 29, 2016 16:17 UTC | MARKETAXESS HOLDINGS INC MKTX · Entity 3821 | GiftCommon Stock, par value $0.003 per share | 1,300 | $0.00 | $0.00 |
DisclosureSEC source: 0001012975-16-001637 · edgar.xml · nonDerivative · entry 1 Casper Stephen P · CIK 0001296969 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 47,868 Read SEC document |
| August 03, 2016 Filed Mar 10, 2017 16:06 UTC Amendment | MARKETAXESS HOLDINGS INC MKTX · Entity 3821 | GrantCommon Stock, par value $0.003 per share | 763 | $0.00 | $0.00 |
DisclosureSEC source: 0001012975-17-000210 · edgar.xml · nonDerivative · entry 1 Casper Stephen P · CIK 0001296969 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 49,264 F1 · shares: This amendment is being filed to correct the amount of shares granted to the Reporting Person. Due to a processing error, the original Form 4 underreported the amount of shares granted. F2 · price: Represents a grant of restricted stock pursuant to the Company's 2012 Incentive Plan. F3 · balance_after: Represents the amount of shares beneficially owned by the Reporting Person immediately following the reported transaction. As of the filing date of this amendment, the Reporting Person beneficially owns 47,964 shares. Read SEC document |
Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.