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United States · SEC Form 4 · Snapshot date: 2026-10-18 · Built: 2026-10-18 · 中文

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US · SEC FORM 4

CARMAX INC

KMX · NYSE · CIK 0001170010 · Consumer Cyclical · Auto & Truck Dealerships

INSIDER SIGNAL

77.0 / 100

5 buyers · 5 purchase transaction lines · $1.0M gross purchase

WHY THIS SIGNAL?

Buyer breadthStrong
Purchase sizeModerate
RoleModerate
RecencyLow
ConvictionStrong
Score anatomy

Each bar shows the contribution to the current score; the weights and formula stay unchanged.

Cluster+35.0 / 35
Purchase size+17.6 / 25
Role+13.0 / 20
Recency+1.5 / 10
Conviction+10.0 / 10

What is holding the score back?

  • ⚠ Role scores low · most senior buyer: President and CEO (CEO, chair and 10% owners score lowest)
  • ⚠ Purchase activity is becoming less recent
  • ✓ Cluster breadth is broad · 4+ insiders

Purchase-size comments are relative to the model scale. Average daily volume is a separate market-context diagnostic.

US-v1.2 ranks qualifying equity purchases under the current 180-day rules. The score is a research priority, not a return forecast or probability. Backtests have not shown that a higher US score is followed by better returns.

Insider activity timeline

Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.

AprMayJunJulAugSepOct
FOLLIARD THOMAS JDirector
○○○
Shinder MarcellaDirector
●○
ONeil Mark FDirector
●○
Chawla SonaDirector
●○
Bensen Peter JDirector
●○
Stuckey John M IIISVP, Gen Counsel & Secretary
○○
● Purchase▼ Sale○ Other

Showing the six most active owners; 12 additional owner(s) remain in Form 4 evidence.

Purchase breadth & concentration

QUALIFYING BUYERS5
PURCHASE CONCENTRATION49%Largest buyer: Barr Keith · $498.3K
CLUSTER BUYING · 15D5 insidersPeak activity: 2026-06-22–2026-06-25

Roles in the peak window: Director, President and CEO. Concentration uses priced qualifying P lines only and does not change the saved score.

SIGNAL HISTORY

77.0 / 100

Latest recorded score

↓ -0.1 ptsversus the previous recorded snapshot
  1. 77.2
  2. 77.2
  3. 77.2
  4. 77.1
  5. 77.0

Only scores saved when a full US scoring run completed are shown; gaps are not reconstructed.

Recent Form 4 activity

5Purchases
0Sales
28Other Form 4 lines
27SEC filings · 365 days
BUYING5 qualifying P line(s) · 180 days
SELLING0 sale line(s) · context only
OTHER21 exercise / withholding / award / gift / other lines
10b5-1 / PLANNEDNot assessed

P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.

Market context

Market context provides additional background on recent price performance and risk. It does not affect the Insider Signal.

Price performance

1M
-13.1%
3M
-4.1%
6M
+12.6%
12M
+18.6%

Volatility & liquidity

Volatility
47.3%
Beta
—
Avg daily value
USD 136.3M

Valuation

Market cap
USD 7.5B
P/E
30.2×

Fundamentals

Profit margin
1.0%
ROE
4.2%
Industry
Auto & Truck Dealerships

Market data

Price data up to: 2026-10-11 · Price source: OpenBB/yfinance; volume from price cache (yfinance) · From SEC filings: Market cap, P/E, Profit margin, ROE · Fiscal year ended: 2026-02-28 · Market cap is the shares outstanding stated on the filing cover multiplied by the latest close. Share count date: 2026-09-28 · Status: PASS

Short interest

Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.

Shares short
10,762,114
Previous report
9,815,859
Avg daily volume
4,498,927
Days to cover
2.4

FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.

Historical equity purchases

Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.

Transaction dateReporting ownerTypeSecuritySharesAvg. priceApprox. valueSource
2026-06-25Shinder MarcellaPurchase (P)Common Stock574USD 52.01USD 29,854SEC filing ↗
2026-06-25Chawla SonaPurchase (P)Common Stock2,000USD 53.39USD 106,780SEC filing ↗
2026-06-24ONeil Mark FPurchase (P)Common Stock4,800USD 52.36USD 251,328SEC filing ↗
2026-06-22Bensen Peter JPurchase (P)Common Stock2,500USD 52.20USD 130,500SEC filing ↗
2026-06-22Barr KeithPurchase (P)Common Stock9,400USD 53.01USD 498,294SEC filing ↗
2025-10-02ONeil Mark FPurchase (P)Common Stock10,816USD 46.21USD 499,807SEC filing ↗
2025-10-02STEENROD MITCHELL DPurchase (P)Common Stock2,000USD 45.57USD 91,140SEC filing ↗
2025-04-24STEENROD MITCHELL DPurchase (P)Common Stock1,300USD 65.49USD 85,137SEC filing ↗
2022-12-30Nash William DPurchase (P)Common Stock8,220USD 60.98USD 501,256SEC filing ↗
2020-09-30ONeil Mark FPurchase (P)Common Stock2,700USD 93.40USD 252,180SEC filing ↗
2020-04-17Goodman ShiraPurchase (P)Common Stock1,550USD 63.91USD 99,060SEC filing ↗

Form 4 evidence

33 transaction lines in the latest 365-day window; 494 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-06-26Shinder MarcellaAward / grant (A)Common Stock3,696USD 0.00USD 0SEC filing ↗
2026-06-26Satriano PietroAward / grant (A)Common Stock3,696USD 0.00USD 0SEC filing ↗
2026-06-26OShaughnessy RobertAward / grant (A)Common Stock3,696USD 0.00USD 0SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-06-26Shinder MarcellaAward / grant (A)Common Stock3,696USD 0.00USD 0SEC filing ↗
2026-06-26Satriano PietroAward / grant (A)Common Stock3,696USD 0.00USD 0SEC filing ↗
2026-06-26OShaughnessy RobertAward / grant (A)Common Stock3,696USD 0.00USD 0SEC filing ↗
2026-06-26ONeil Mark FAward / grant (A)Common Stock3,696USD 0.00USD 0SEC filing ↗
2026-06-26McCreight David W.Award / grant (A)Common Stock3,696USD 0.00USD 0SEC filing ↗
2026-06-26KESSLER JAMES FRANCISAward / grant (A)Common Stock3,696USD 0.00USD 0SEC filing ↗
2026-06-26FOLLIARD THOMAS JAward / grant (A)Common Stock3,696USD 0.00USD 0SEC filing ↗
2026-06-26Chawla SonaAward / grant (A)Common Stock3,696USD 0.00USD 0SEC filing ↗
2026-06-26COBB WILLIAM CAward / grant (A)Common Stock3,696USD 0.00USD 0SEC filing ↗
2026-06-26Bensen Peter JAward / grant (A)Common Stock3,696USD 0.00USD 0SEC filing ↗
2026-06-25Shinder MarcellaPurchase (P)Common Stock574USD 52.01USD 29,854SEC filing ↗
2026-06-25Chawla SonaPurchase (P)Common Stock2,000USD 53.39USD 106,780SEC filing ↗
2026-06-24ONeil Mark FPurchase (P)Common Stock4,800USD 52.36USD 251,328SEC filing ↗
2026-06-23FOLLIARD THOMAS JOption exercise / conversion (M)Common Stock14,855USD 51.91USD 771,123SEC filing ↗
2026-06-23FOLLIARD THOMAS JTax withholding (F)Common Stock3,618USD 51.91USD 187,810SEC filing ↗
2026-06-22Bensen Peter JPurchase (P)Common Stock2,500USD 52.20USD 130,500SEC filing ↗
2026-06-22Barr KeithPurchase (P)Common Stock9,400USD 53.01USD 498,294SEC filing ↗
2026-05-01Wilson Charles JosephTax withholding (F)Common Stock1,015USD 38.53USD 39,108SEC filing ↗
2026-05-01Stuckey John M IIIOption exercise / conversion (M)Common Stock1,183USD —USD —SEC filing ↗
2026-05-01Stuckey John M IIITax withholding (F)Common Stock357USD 38.53USD 13,755SEC filing ↗
2026-05-01Shamim MohammadTax withholding (F)Common Stock1,015USD 38.53USD 39,108SEC filing ↗
2026-05-01Mayor-Mora Enrique NTax withholding (F)Common Stock1,015USD 38.53USD 39,108SEC filing ↗
2026-05-01Livesay Jill AOption exercise / conversion (M)Common Stock1,059USD —USD —SEC filing ↗
2026-05-01Livesay Jill ATax withholding (F)Common Stock319USD 38.53USD 12,291SEC filing ↗
2026-05-01Daniels Jon GTax withholding (F)Common Stock822USD 38.53USD 31,672SEC filing ↗
2026-05-01Cafritz Diane LTax withholding (F)Common Stock1,015USD 38.53USD 39,108SEC filing ↗
2026-03-22Tuite TylerOption exercise / conversion (M)Common Stock806USD —USD —SEC filing ↗
2026-03-16McCreight David W.Option exercise / conversion (M)Common Stock30,558USD 41.71USD 1,274,574SEC filing ↗
2026-03-16McCreight David W.Tax withholding (F)Common Stock11,423USD 41.71USD 476,453SEC filing ↗
2026-03-16Barr KeithAward / grant (A)Common Stock23,975USD 0.00USD 0SEC filing ↗

Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.

Snapshot & identity

Snapshot date2026-10-18
Ranking versionUS-v1.2
Data qualityPASS ELIGIBLE · —
TickerKMX
CIK0001170010
SectorConsumer Cyclical
IndustryAuto & Truck Dealerships Yahoo Finance
SEC SIC5500 Retail-Auto Dealers & Gasoline Stations
ExchangeNYSE

Data coverage

Local Form 4 history494 transaction lines from 2020-02-03 to 2026-06-26
11 P purchase lines · 126 S sale lines · 357 other lines
SEC company submissionsOpen SEC filings ↗

Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.