MarketAxess (MKTX) CTO William Quan files Form 3 showing zero share ownership

Rhea-AI Filing Summary

MARKETAXESS HOLDINGS INC filed an initial insider ownership report for Chief Technology Officer William Quan. This Form 3 shows that as of the reporting date he had no directly owned shares of the company’s common stock outstanding in his name. The filing is an administrative disclosure of his starting ownership position as a corporate officer.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Quan William

Role Chief Technology Officer

Type	Security	Shares	Price	Value
holding	Common Stock, par value $0.003 per share	--	--	--

Holdings After Transaction: Common Stock, par value $0.003 per share — 0 shares (Direct)

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Accepted by SEC EDGAR 03/16/2026 - 04:15 PM Learn about SEC filing dates

FAQ

What does the MarketAxess (MKTX) Form 3 for William Quan show?

The Form 3 shows that Chief Technology Officer William Quan reported zero shares of MarketAxess common stock owned directly as of the reporting date. This establishes his initial disclosed ownership position as a company officer.

Who is the reporting person in the MarketAxess (MKTX) Form 3?

The reporting person is William Quan, who serves as Chief Technology Officer of MarketAxess Holdings Inc. The filing records his initial beneficial ownership status in the company’s common stock as required for corporate officers.

How many MarketAxess (MKTX) shares does William Quan report owning?

William Quan reports 0 shares of MarketAxess common stock owned directly following the reported position. The Form 3 indicates no common stock holdings in his name at the time of this initial ownership statement.

Is the MarketAxess (MKTX) Form 3 a buy or sell transaction?

The Form 3 is not a buy or sell transaction. It is an initial statement of beneficial ownership, and the data show no reported purchases, sales, or derivative exercises, only that direct holdings of common stock were zero.

Does the MarketAxess (MKTX) Form 3 disclose any derivative securities?

The filing shows no derivative securities reported for William Quan. The derivative summary is empty, indicating no listed options, warrants, or other derivative positions tied to MarketAxess common stock in this specific ownership report.

SEC Form 3

FORM 3

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

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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:			3235-0104
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

Quan William

(Last) (First) (Middle)

C/O MARKETAXESS HOLDINGS INC.

55 HUDSON YARDS, 15TH FLOOR

(Street)

NEW YORK NY 10001

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
03/16/2026

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

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Technology Officer

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

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

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

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock, par value $0.003 per share	0	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

Remarks:

Exhibit 24-Power of Attorney

	/s/ Patrick Wilson as Attorney-in-Fact for William Quan	03/16/2026
	** 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 5 (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.