KMX insider purchase: 10,816 shares at $46.19–$46.21 increases stake

Rhea-AI Filing Summary

Insider purchase disclosed: A Form 4 filed for Mark F. ONeil, a director of CarMax Inc. (KMX), shows he purchased 10,816 shares of CarMax common stock on 10/02/2025 at prices ranging from $46.19 to $46.21. After this transaction he beneficially owned 24,690 shares. The filing was signed on 10/06/2025 by an attorney-in-fact. The filer checked the box indicating individual filing as a director, and provided an explanation that per-share purchase prices varied within the stated range and that detailed allocation by price is available on request.

Insights

Corporate Governance Analyst

Director made a routine open-market purchase, modestly increasing stake.

The purchase of 10,816 shares at about $46.21 appears to be an open-market acquisition recorded under Section 16. Such purchases by a director increase personal alignment with shareholders and may reflect confidence in long-term value without indicating any undisclosed material information.

Dependence on public disclosure rules means timing and size are transparent; watch for additional Form 4s in the next 30 days if this was part of a phased plan. The filing notes price-range detail and offers allocation breakdown on request.

Equity Trading Specialist

Transaction size is small relative to large-cap norms but material to insider holdings.

After the purchase the reporting person holds 24,690 shares; the 10,816-share trade represents the disclosed change. The per-share prices range from $46.19 to $46.21, indicating execution over multiple trades within a tight spread.

If assessing market impact or signaling, note there is no indication the trades were under a 10b5-1 plan; monitoring subsequent Form 4 filings and trading volume around 10/02/2025 can clarify whether this was routine accumulation.

Insider Trade Summary

Net Buyer: 10,816 shares ($499,807)

Net Buy 1 txn

Insider ONeil Mark F

Role Director

Bought 10,816 shs ($500K)

Type	Security	Shares	Price	Value
Purchase	Common Stock	10,816	$46.21	$500K

Holdings After Transaction: Common Stock — 24,690 shares (Direct)

Footnotes (1)

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Form 4 Insider Transactions: What Each Field Means →

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 VA 23238

(City) (State) (Zip)

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)

3. Date of Earliest Transaction (Month/Day/Year)
10/02/2025

4. 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 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	10/02/2025		P		10,816	A	$46.21(1)	24,690	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:

1. The shares with respect to this transaction were purchased at prices ranging from $46.19 to $46.21. Upon request, the Reporting Person will provide the Securities and Exchange Commission staff, the Issuer, or any security holder of the Issuer, full information regarding the number of shares purchased at each separate price.

Remarks:

	Christine Carter, attorney-in-fact	10/06/2025
	** 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.

FAQ

What did the Form 4 for KMX filed by Mark F. ONeil report?

The Form 4 reports that Director Mark F. ONeil purchased 10,816 shares on 10/02/2025 at prices ranging from $46.19 to $46.21, increasing his beneficial ownership to 24,690 shares.

Was the transaction executed under a 10b5-1 plan for KMX?

No box indicating a 10b5-1 trading plan was checked on the Form 4; the filing does not state that the trades were made pursuant to such a plan.

Who signed the Form 4 filed for KMX and when?

The Form 4 was signed by Christine Carter, attorney-in-fact on 10/06/2025.

What price details are disclosed for the KMX purchase?

The filing states the shares were purchased at prices ranging from $46.19 to $46.21 and that the reporting person can provide a breakdown of how many shares were bought at each price upon request.

How many shares does the director own after the transaction?

After the reported purchase the director beneficially owned 24,690 shares of CarMax common stock.