CarMax (NYSE: KMX) director adds 9,600 shares via direct and trust buys

Rhea-AI Filing Summary

CarMax director Mark F. O’Neil reported open‑market purchases totaling 9,600 shares of CarMax common stock at $52.36 per share on June 24, 2026. Following these transactions, he holds 29,490 shares directly, plus additional indirect ownership through his spouse and related family trusts.

Insider Trade Summary

Net Buyer: 9,600 shares ($502,656)

Net Buy 3 txns

Insider ONeil Mark F

Role null

Bought 9,600 shs ($503K)

Type	Security	Shares	Price	Value
Purchase	Common Stock	4,800	$52.36	$251K
Purchase	Common Stock	4,800	$52.36	$251K
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 29,490 shares (Direct, null); Common Stock — 4,800 shares (Indirect, The Mark F. O'Neil Family Irrevocable GST Trust)

Footnotes (1)

1. [object Object]

Key Figures

Total shares purchased: 9,600 shares Purchase price: $52.36 per share Direct holdings after trade: 29,490 shares +2 more

5 metrics

Total shares purchased 9,600 shares Open-market purchases on June 24, 2026

Purchase price $52.36 per share Price for each of the 4,800-share purchases

Direct holdings after trade 29,490 shares Common stock held directly after purchases

Spouse trust holdings 16,684 shares Common stock held by spouse’s revocable trust

Family GST Trust holdings 4,800 shares Common stock held by Mark F. O’Neil Family Irrevocable GST Trust

Key Terms

open-market purchase, indirect ownership, Irrevocable GST Trust, Common Stock

4 terms

open-market purchase financial

"Purchase in open market or private transaction"

An open-market purchase is when an investor or a company buys shares on a public stock exchange at the going market price, rather than through a private deal. It matters to investors because these purchases change how many shares are available, can push the stock price up or signal confidence from large buyers, and often affect per-share metrics like earnings—think of it like someone buying lots of apples off a grocery shelf, reducing supply and potentially raising the price.

indirect ownership financial

"ownership_type": "indirect","ownership_code": "I""

Irrevocable GST Trust financial

"The Mark F. O'Neil Family Irrevocable GST Trust"

Common Stock financial

""security_title": "Common Stock""

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 06/26/2026 - 04:13 PM Accepted by SEC EDGAR 06/26/2026 - 04:13 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).

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^*

ONeil Mark F

(Last) (First) (Middle)

12800 TUCKAHOE CREEK PARKWAY

(Street)

RICHMOND VIRGINIA 23238

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
CARMAX INC [ KMX ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/24/2026

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	06/24/2026		P		4,800	A	$52.36	29,490	D
Common Stock	06/24/2026		P		4,800	A	$52.36	4,800	I	The Mark F. O'Neil Family Irrevocable GST Trust
Common Stock								16,684	I	By Spouse(1)

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:

1. Shares are held by the Reporting Person's spouse in the revocable Monique Cannella O'Neil Trust.

Remarks:

Exhibit 24.1 Power of Attorney

	Christine Carter, attorney-in-fact	06/26/2026
	** 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)

FAQ

What insider transaction did CarMax (KMX) director Mark F. O’Neil report?

Mark F. O’Neil reported buying 9,600 CarMax common shares in open‑market transactions. The Form 4 shows two purchases of 4,800 shares each at $52.36 per share on June 24, 2026, split between direct holdings and a family trust.

At what price did the CarMax (KMX) director’s recent share purchases occur?

The reported purchases were made at $52.36 per CarMax share. The Form 4 lists two open‑market transactions of 4,800 shares each at this price on June 24, 2026, for a combined total of 9,600 shares acquired.

How many CarMax (KMX) shares does Mark F. O’Neil own after this Form 4?

After the reported transactions, Mark F. O’Neil directly owns 29,490 CarMax common shares. The filing also shows indirect holdings, including 16,684 shares held by his spouse’s trust and 4,800 shares held by the Mark F. O’Neil Family Irrevocable GST Trust.

Were the recent CarMax (KMX) insider trades direct or through trusts?

The Form 4 shows both direct and trust‑based ownership. O’Neil bought 4,800 shares directly and 4,800 shares through the Mark F. O’Neil Family Irrevocable GST Trust, while 16,684 shares are reported as held indirectly by his spouse’s revocable trust.

Does the CarMax (KMX) Form 4 show insider buying or selling?

The filing reflects insider buying activity, not selling. Transaction data shows two open‑market purchase transactions coded “P,” totaling 9,600 CarMax common shares acquired on June 24, 2026, with no reported sales in this Form 4.