MarketAxess counsel sells 100 shares at $163.32

MarketAxess’s General Counsel and Secretary sold 100 MKTX shares under a Rule 10b5-1 trading plan, retaining 11,486 shares afterward.

Rhea-AI Filing Summary

MARKETAXESS HOLDINGS INC (MKTX) reported that its General Counsel and Secretary, Scott Pintoff, sold 100 shares of common stock on September 10, 2026, at a price of $163.32 per share in a transaction described as an open-market or private sale. The sale was made pursuant to a Rule 10b5-1 trading plan, and following this transaction he held 11,486 shares of the company’s common stock directly.

Insider Trade Summary 10b5-1

Net Seller: 100 shares

Net Sell 1 txn

Insider Pintoff Scott

Role General Counsel and Secretary

Sold 100 shs ($16K)

Type	Security	Shares	Price	Value
Sale	Common Stock, par value $0.003 per share	100	$163.32	$16K

Holdings After Transaction: Common Stock, par value $0.003 per share — 11,486 shares (Direct)

Key Figures

Shares sold: 100 shares Sale price per share: $163.32 per share Shares held after transaction: 11,486 shares

3 metrics

Shares sold 100 shares Common stock sale by General Counsel and Secretary on September 10, 2026

Sale price per share $163.32 per share Price for the 100 shares of common stock sold on September 10, 2026

Shares held after transaction 11,486 shares Direct ownership of General Counsel and Secretary after the September 10, 2026 sale

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did MKTX report for General Counsel Scott Pintoff?

MARKETAXESS HOLDINGS INC reported that General Counsel and Secretary Scott Pintoff sold 100 shares of common stock on September 10, 2026, in an open-market or private transaction at $163.32 per share, and continued to hold 11,486 shares directly afterward.

Was the recent MKTX insider sale made under a Rule 10b5-1 plan?

Yes. The filing states that the reported transaction by General Counsel and Secretary Scott Pintoff was made pursuant to a Rule 10b5-1 trading plan, indicating it followed a pre-established trading arrangement rather than being an ad hoc trade.

How many MKTX shares did the insider retain after the September 10, 2026 sale?

After selling 100 shares on September 10, 2026, General Counsel and Secretary Scott Pintoff held 11,486 shares of MARKETAXESS HOLDINGS INC common stock directly, according to the Form 4 filing.

What price did the MKTX insider receive per share in the September 2026 sale?

The filing reports that the 100 shares of MARKETAXESS HOLDINGS INC common stock sold by General Counsel and Secretary Scott Pintoff on September 10, 2026, were sold at $163.32 per share.

What role does the reporting person in the MKTX Form 4 hold at the company?

The reporting person on the Form 4, Scott Pintoff, is identified as the company’s General Counsel and Secretary of MARKETAXESS HOLDINGS INC.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/11/2026 - 04:15 PM Accepted by SEC EDGAR 09/11/2026 - 04:15 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

X

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Pintoff Scott

(Last) (First) (Middle)

C/O MARKETAXESS HOLDINGS INC.

55 HUDSON YARDS, 15TH FLOOR

(Street)

NEW YORK NEW YORK 10001

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
MARKETAXESS HOLDINGS INC [ MKTX ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	General Counsel and Secretary

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/10/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock, par value $0.003 per share	09/10/2026		S		100	D	$163.32	11,486	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

	/s/ Patrick Wilson as Attorney-in-Fact for Scott Pintoff	09/11/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)