SEC Form 4

CarMax Inc. (KMX) insider trading

In the 12 months to Oct 26, 2026, 5 KMX insiders reported open-market purchases of $1.3M across 5 filings; no open-market sales were filed.

Latest filing Jun 29, 2026 · Last 12 months · Source: SEC EDGAR · How we count

Open-market sales: $0; 0 filings · 0 insiders
Open-market purchases: $1.3M; 5 filings

Who traded KMX, and when

Purchase

KMX daily closelast $52.47

Mark F. ONeil · Director

$502.7K bought

Keith Barr · President and CEO

$498.2K bought

Peter J. Bensen · Director

$130.5K bought

Sona Chawla · Director

$106.8K bought

Marcella Shinder · Director

$29.9K bought

One row per insider; marks sit at the SEC filing date, sized by dollar value.

Open-market trades

5 filings in the last 12 months

Insider	Role	Sold	Bought	Filings	Pre-arranged (10b5-1)	Last filed
Mark F. ONeil	Director	—	$502.7K	1	—	Jun 26, 2026
Keith Barr	President and CEO	—	$498.2K	1	—	Jun 24, 2026
Peter J. Bensen	Director	—	$130.5K	1	—	Jun 24, 2026
Sona Chawla	Director	—	$106.8K	1	—	Jun 26, 2026
Marcella Shinder	Director	—	$29.9K	1	—	Jun 26, 2026

Filed	Insider	Type	Shares	Avg price	Value	Held after
Jun 26, 2026 traded Jun 24, 2026	Mark F. ONeil Director	Purchase	9,600	$52.36	$502.7K	Multiple accounts
Jun 26, 2026 traded Jun 25, 2026	Marcella Shinder Director	Purchase	574	$52.01	$29.9K	24,993
Jun 26, 2026 traded Jun 25, 2026	Sona Chawla Director	Purchase	2,000	$53.39	$106.8K	21,702
Jun 24, 2026 traded Jun 22, 2026	Keith Barr President and CEO	Purchase	9,400	$53.01	$498.2K	33,375
Jun 24, 2026 traded Jun 22, 2026	Peter J. Bensen Director	Purchase	2,500	$52.20	$130.5K	24,796

GET /stocks/filings/vX/form-4?tickers=KMX&filing_date.gte=2025-10-26&sort=filing_date.desc&limit=500

{
  "status": "OK",
  "results": [
    {
      "tickers": [
        "KMX"
      ],
      "issuer_cik": "0001170010",
      "owner_cik": "0001438864",
      "accession_number": "0001170010-26-000075",
      "form_type": "4",
      "filing_date": "2026-06-26",
      "period_of_report": "2026-06-25",
      "issuer_name": "CARMAX INC",
      "issuer_trading_symbol": "KMX",
      "owner_name": "Chawla Sona",
      "is_director": true,
      "is_officer": false,
      "is_ten_percent_owner": false,
      "is_other": false,
      "security_type": "non_derivative",
      "record_type": "transaction",
      "security_title": "Common Stock",
      "transaction_timeliness": "O",
      "aff_10b5_one": false,
      "transaction_date": "2026-06-25",
      "transaction_code": "P",
      "equity_swap_involved": false,
      "transaction_shares": 2000,
      "transaction_price_per_share": 53.39,
      "transaction_acquired_disposed": "A",
      "shares_owned_following_transaction": 21702,
      "transaction_value": 106780,
      "not_subject_to_section_16": false,
      "direct_or_indirect": "D",
      "remarks": "Exhibit 24.1 Power of Attorney"
    },
    {
      "tickers": [
        "KMX"
      ],
      "issuer_cik": "0001170010",
      "owner_cik": "0001639923",
      "accession_number": "0001170010-26-000074",
      "form_type": "4",
      "filing_date": "2026-06-26",
      "period_of_report": "2026-06-25",
      "issuer_name": "CARMAX INC",
      "issuer_trading_symbol": "KMX",
      "owner_name": "Shinder Marcella",
      "is_director": true,
      "is_officer": false,
      "is_ten_percent_owner": false,
      "is_other": false,
      "security_type": "non_derivative",
      "record_type": "transaction",
      "security_title": "Common Stock",
      "transaction_timeliness": "O",
      "aff_10b5_one": false,
      "transaction_date": "2026-06-25",
      "transaction_code": "P",
      "equity_swap_involved": false,
      "transaction_shares": 574,
      "transaction_price_per_share": 52.01,
      "transaction_acquired_disposed": "A",
      "shares_owned_following_transaction": 24993,
      "transaction_value": 29853.739999999998,
      "not_subject_to_section_16": false,
      "direct_or_indirect": "D",
      "remarks": "Exhibit 24.1 - Power of Attorney"
    }
  ]
}

// trimmed to 2 results

The response includes every Form 4 record; this page keeps open-market purchases and sales on common stock and removes duplicate joint-filer rows.

Query this data with the API

Other insider activity (not market trades) · 29 records

Option exercises7 records
Tax withholding10 records
Grants and awards11 records
Other1 record

Reported on Form 4 but not purchases or sales in the market, so not counted in the totals above.

How to read this page

Open-market purchase or sale: A buy or sell of the company's stock at market price. Grants, option exercises, shares withheld for tax, gifts and employee stock plan purchases are listed separately and not counted.
Filing date: Insiders have two business days to report a trade. Totals and the chart use the filing date, when the trade became public.

Frequently asked questions

Has CarMax Inc.'s CEO sold stock?

No. Keith Barr and David W. McCreight (CEOs) made no open-market sales filed as CEO in the last 12 months.

How current is KMX’s insider data?

These are KMX Form 4 filings from the last year, refreshed daily. The Massive Form 4 API has the full, continuously updated record.

What counts as an open-market buy or sell?

Only purchases and sales at the market price. Option exercises, grants, gifts, and shares withheld for taxes are reported on Form 4 but are left out of the buy and sell totals.

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Track KMX insider trades with your agent

This page joins two Massive endpoints: Form 4 filings and daily prices. Ask an agent to watch for new filings:

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Using the Massive API (massive.com/docs/llms.txt), check Form 4 filings for KMX every day with transaction_code=P and tell me when an insider files an open-market purchase, with their role, shares, price and the filing link.

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