Christopher R. Concannon

CIK: 0001251713

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)0 (0.0%)

Position reduction

Option Exercises (M)0 (0.0%)

Derivative conversions

Awards (A)4 (40.0%)

Compensation grants

Other (G, F, J, C, D, …)6 (60.0%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

MKTX

MARKETAXESS HOLDINGS INC

DirectorOfficer

Discretionary Trading P&L

Holdings

Transaction History (10 total)

MKTX
MARKETAXESS HOLDINGS INC
Apr 3, 2026
Tax Payment(F)
Direct
349 shares at avg. $171.46$60K
MKTX
MARKETAXESS HOLDINGS INC
Feb 15, 2026
Tax Payment(F)
Direct
1.8K shares at avg. $179.36$314K
MKTX
MARKETAXESS HOLDINGS INC
Feb 15, 2026
Tax Payment(F)
Direct
866 shares at avg. $179.36$155K
MKTX
MARKETAXESS HOLDINGS INC
Feb 15, 2026
Award(A)
Direct
6.6K shares-
MKTX
MARKETAXESS HOLDINGS INC
Feb 13, 2026
Award(A)
Direct
1.7K shares-
MKTX
MARKETAXESS HOLDINGS INC
Feb 15, 2025
Award(A)
Direct
6.2K shares-
MKTX
MARKETAXESS HOLDINGS INC
Feb 15, 2025
Tax Payment(F)
Direct
693 shares at avg. $193.49$134K
MKTX
MARKETAXESS HOLDINGS INC
Jan 31, 2025
Tax Payment(F)
Direct
585 shares at avg. $217.77$127K
MKTX
MARKETAXESS HOLDINGS INC
Jan 31, 2025
Tax Payment(F)
Direct
243 shares at avg. $217.77$53K
MKTX
MARKETAXESS HOLDINGS INC
Jan 29, 2025
Award(A)
Direct
1.6K shares-

		Type	Shares	Price		Ownership
Apr 3, 2026	MKTX MARKETAXESS HOLDINGS INC	Tax Payment(F)	349	$171.46	$59,840	Direct
Feb 15, 2026	MKTX MARKETAXESS HOLDINGS INC	Tax Payment(F)	1,750	$179.36	$313,880	Direct
Feb 15, 2026	MKTX MARKETAXESS HOLDINGS INC	Tax Payment(F)	866	$179.36	$155,326	Direct
Feb 15, 2026	MKTX MARKETAXESS HOLDINGS INC	Award(A)	6,588	-	$0	Direct
Feb 13, 2026	MKTX MARKETAXESS HOLDINGS INC	Award(A)	1,696	-	$0	Direct
Feb 15, 2025	MKTX MARKETAXESS HOLDINGS INC	Award(A)	6,202	-	-	Direct
Feb 15, 2025	MKTX MARKETAXESS HOLDINGS INC	Tax Payment(F)	693	$193.49	$134,089	Direct
Jan 31, 2025	MKTX MARKETAXESS HOLDINGS INC	Tax Payment(F)	585	$217.77	$127,395	Direct
Jan 31, 2025	MKTX MARKETAXESS HOLDINGS INC	Tax Payment(F)	243	$217.77	$52,918	Direct
Jan 29, 2025	MKTX MARKETAXESS HOLDINGS INC	Award(A)	1,622	-	$0	Direct

1-10 of 10 transactions

About CONCANNON CHRISTOPHER R

CONCANNON CHRISTOPHER R (SEC CIK 0001251713) files insider reports with the SEC as Chief Executive Officer of MARKETAXESS HOLDINGS INC (MKTX).

Signal8 holds 4 ownership filings by CONCANNON CHRISTOPHER R, all Form 4s, filed between Jan 31, 2025 and Apr 6, 2026. Those filings report 10 transactions, from Jan 29, 2025 to Apr 3, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on CONCANNON CHRISTOPHER R's filings is in NEW YORK, NY.

Recent filings by CONCANNON CHRISTOPHER R

Apr 3, 2026: Tax withholding of MKTX shares (Form 4, code F).
Feb 15, 2026: Tax withholdings of MKTX shares (2 lines, Form 4, code F).
Feb 15, 2026: Grant or award of MKTX shares (Form 4, code A).
Feb 13, 2026: Grant or award of MKTX shares (Form 4, code A).
Feb 15, 2025: Grant or award of MKTX shares (Form 4, code A).

Other insiders filing for MARKETAXESS HOLDINGS INC (MKTX)

Pintoff Scott, General Counsel and Secretary
Cruger William Frank Jr., Director
Portney Emily Hope, Director
Chwick Jane, Director
HERNANDEZ CARLOS MAURICIO, Director
Altobello Nancy A., Director

How to read Form 4 transaction codes