Exhibit 99.1
MONTHLY SERVICER'S CERTIFICATE
CARMAX BUSINESS SERVICES, LLC
CARMAX AUTO OWNER TRUST
SERIES 2026-3
Collection Period07/01/26-07/31/26
Determination Date8/10/2026
Distribution Date8/17/2026
Additional information, including defined terms, can be found in the prospectus on the SEC's EDGAR system (http://www.sec.gov) under File No. 333-288943-07.




Pool Balance
1.Pool Balance on the close of the last day of the preceding Collection Period$1,353,384,019.62 
2.Collections allocable to Principal$53,120,913.89 
3.Purchase Amount allocable to Principal$0.00 
4.Defaulted Receivables$0.00 
5.Pool Balance on the close of the last day of the related Collection Period$1,300,263,105.73 
(Ln1 - Ln2 - Ln3 - Ln4)
6.Total number of Receivables outstanding on the close of the last day of the related Collection Period77,500 
7.Initial Pool Balance$1,353,384,019.62 
Beginning of PeriodEnd of Period
8.Note Balances
a. Class A-1 Note Balance
$297,800,000.00 $244,679,645.68 
b. Class A-2 Note Balance$451,730,000.00 $451,730,000.00 
c. Class A-3 Note Balance$451,730,000.00 $451,730,000.00 
d. Class A-4 Note Balance$81,750,000.00 $81,750,000.00 
e. Class B Note Balance$23,680,000.00 $23,680,000.00 
f. Class C Note Balance$25,710,000.00 $25,710,000.00 
g. Class D Note Balance$17,600,000.00 $17,600,000.00 
h. Note Balance (sum a - g)$1,350,000,000.00 $1,296,879,645.68 
9.Pool Factors
a. Class A-1 Note Pool Factor1.0000000 0.8216241 
b. Class A-2 Note Pool Factor1.0000000 1.0000000 
c. Class A-3 Note Pool Factor1.0000000 1.0000000 
d. Class A-4 Note Pool Factor1.0000000 1.0000000 
e. Class B Note Pool Factor1.0000000 1.0000000 
f. Class C Note Pool Factor1.0000000 1.0000000 
g. Class D Note Pool Factor1.0000000 1.0000000 
h. Note Pool Factor1.0000000 0.9606516 
10.Overcollateralization Target Amount$3,383,460.05 
11.Current overcollateralization amount (Pool Balance - Note Balance)$3,383,460.05 
12.Weighted Average Coupon8.42 %
13.Weighted Average Original Termmonths67.16 
14.Weighted Average Remaining Termmonths58.48 
Collections
15.Finance Charges:
a. Collections allocable to Finance Charge$9,362,913.40 
b. Liquidation Proceeds allocable to Finance Charge$0.00 
c. Purchase Amount allocable to Finance Charge$0.00 
d. Available Finance Charge Collections (sum a - c)$9,362,913.40 
16.Principal:
a. Collections allocable to Principal$53,120,913.89 
b. Liquidation Proceeds allocable to Principal$0.00 
c. Purchase Amount allocable to Principal$0.00 
d. Available Principal Collections (sum a - c)$53,120,913.89 
17.Total Finance Charge and Principal Collections (15d + 16d)$62,483,827.29 
18.Interest Income from Collection Account$46,660.09 
19.Simple Interest Advances$0.00 
20.Available Collections (Ln17 + 18 + 19)$62,530,487.38 



Available Funds
21.Available Collections$62,530,487.38 
22.Reserve Account Draw Amount$0.00 
23.Available Funds$62,530,487.38 
Application of Available Funds
24.Servicing Fee0.15 %
a. Monthly Servicing Fee$1,127,820.02 
b. Amount Unpaid from Prior Months$0.00 
c. Amount Paid$1,127,820.02 
d. Shortfall Amount (a + b - c)$0.00 
25.Unreimbursed Servicer Advances$0.00 
26.Successor Servicer and Asset Representations Reviewer Unpaid Expenses and Indemnity Amounts
a. Successor Servicer Unpaid Transition Expenses and Indemnity Amounts (Capped at $175,000 annually)$0.00 
b. Successor Servicer Amount Paid$0.00 
c. Successor Servicer Shortfall Amount (a - b)$0.00 
d. Asset Representations Reviewer Fees, Expenses and Indemnity Amounts (Capped at $175,000 annually)$0.00 
e. Asset Representations Reviewer Amount Paid$0.00 
f. Asset Representations Reviewer Shortfall Amount (d - e)$0.00 
27.Class A Noteholder Interest Amounts
a. Class A-1 Monthly Interest$852,568.31 
b. Additional Note Interest related to Class A-1 Monthly Interest$0.00 
c. Interest Due on Additional Note Interest related to Class A-1 Monthly Interest$0.00 
d. Total Class A-1 Note Interest (sum a - c)$852,568.31 
e. Class A-2 Monthly Interest$1,258,319.01 
f. Additional Note Interest related to Class A-2a Monthly Interest$0.00 
g. Interest Due on Additional Note Interest related to Class A-2a Monthly Interest$0.00 
h. Total Class A-2a Note Interest (sum e - g)$1,258,319.01 
i. Class A-3 Monthly Interest$1,327,584.28 
j. Additional Note Interest related to Class A-3 Monthly Interest$0.00 
k. Interest Due on Additional Note Interest related to Class A-3 Monthly Interest$0.00 
l. Total Class A-3 Note Interest (sum i - k)$1,327,584.28 
m. Class A-4 Monthly Interest$243,910.21 
n. Additional Note Interest related to Class A-4 Monthly Interest$0.00 
o. Additional Note Interest related to Class A-4 Monthly Interest$0.00 
p. Total Class A-4 Note Interest (sum m - o)$243,910.21 
28.Priority Principal Distributable Amount$0.00 
29.Class B Noteholder Interest Amount
a. Class B Monthly Interest$73,677.69 
b. Additional Note Interest related to Class B Monthly Interest$0.00 
c. Interest Due on Additional Note Interest related to Class B Monthly Interest$0.00 
d. Total Class B Note Interest (sum a - c)$73,677.69 
30.Secondary Principal Distributable Amount$6,426,894.27 
31.Class C Noteholder Interest Amount
a. Class C Monthly Interest$82,129.17 
b. Additional Note Interest related to Class C Monthly Interest$0.00 
c. Interest Due on Additional Note Interest related to Class C Monthly Interest$0.00 
d. Total Class C Note Interest (sum a - c)$82,129.17 
32.Tertiary Principal Distributable Amount$25,710,000.00 
33.Class D Noteholder Interest Amount
a. Class D Monthly Interest$60,270.22 
b. Additional Note Interest related to Class D Monthly Interest$0.00 
c. Interest Due on Additional Note Interest related to Class D Monthly Interest$0.00 
d. Total Class D Note Interest (sum a - c)$60,270.22 



34.Quaternary Principal Distributable Amount$17,600,000.00 
35.Required Payment Amount (Ln 24 + Ln 26 + (sum of Ln 27 through Ln 34))$54,763,173.18 
36.Reserve Account Deficiency$0.00 
37.Regular Principal Distributable Amount$3,383,460.05 
38.Remaining Unpaid Servicer Transition Expenses and Additional Servicing Fees, if any$0.00 
39.Remaining Unpaid Trustee and Asset Representations Reviewer Fees, Expenses and Indemnity Amounts, if any
a. Remaining Unpaid Trustee Fees, Expenses and Indemnity Amounts$0.00 
b. Remaining Unpaid Asset Representations Reviewer Fees, Expenses and Indemnity Amounts$0.00 
40.Remaining Unpaid Successor Servicer Indemnity Amounts, if any$0.00 
Collection Account Activity0.15 %
41.Deposits
a. Total Daily Deposits of Finance Charge Collections$9,362,913.40 
b. Total Daily Deposits of Principal Collections$53,120,913.89 
c. Withdrawal from Reserve Account$0.00 
d. Interest Income$46,660.09 
e. Total Deposits to Collection Account (sum a - d)$62,530,487.38 
42.Withdrawals
a. Servicing Fee and Unreimbursed Servicer Advances$1,127,820.02 
b. Successor Servicer Transition Expenses and Indemnity Amounts$0.00 
c. Deposit to Note Payment Account for Monthly Note Interest/Principal$57,018,813.21 
d. Deposit to Reserve Account$0.00 
e. Excess Collections (Deposit to Certificate Payment Account for payment to Certificateholder)$4,383,854.15 
f. Total Withdrawals from Collection Account (sum a - e)$62,530,487.38 
Note Payment Account Activity
43.Deposits
a. Class A-1 Interest Distribution$852,568.31 
b. Class A-2 Interest Distribution$1,258,319.01 
c. Class A-3 Interest Distribution$1,327,584.28 
d. Class A-4 Interest Distribution$243,910.21 
e. Class B Interest Distribution$73,677.69 
f. Class C Interest Distribution$82,129.17 
g. Class D Interest Distribution$60,270.22 
h. Class A-1 Principal Distribution$53,120,354.32 
i. Class A-2 Principal Distribution$0.00 
j. Class A-3 Principal Distribution$0.00 
k. Class A-4 Principal Distribution$0.00 
l. Class B Principal Distribution$0.00 
m. Class C Principal Distribution$0.00 
n. Class D Principal Distribution$0.00 
o. Total Deposits to Note Payment Account (sum a - n)$57,018,813.21 
44.Withdrawals
a. Class A-1 Distribution$53,972,922.63 
b. Class A-2 Distribution$1,258,319.01 
c. Class A-3 Distribution$1,327,584.28 
d. Class A-4 Distribution$243,910.21 
e. Class B Distribution$73,677.69 
f. Class C Distribution$82,129.17 
g. Class D Distribution$60,270.22 
h. Total Withdrawals from Note Payment Account (sum a - g)$57,018,813.21 



Certificate Payment Account Activity
45.Deposits to Certificate Payment Account from Excess Collections$4,383,854.15 
46.Withdrawals from Certificate Payment Account for Certificateholder Distribution$4,383,854.15 
Required Reserve Account Amount0.15 %
47.Required Reserve Account Amount (1.00% of Initial Pool Balance)$3,383,460.05 
Reserve Account Reconciliation
48.Beginning Balance (as of end of preceding Distribution Date)$3,383,460.05 
49.Investment Earnings$3,290.84 
50.Reserve Account Draw Amount$0.00 
51.Reserve Account Amount (Ln 48 + Ln49 - Ln 50)$3,386,750.89 
52.Deposit from Available Funds (Ln 42d)$0.00 
53.If Reserve Account Balance exceeds Required Reserve Account Amount, payment to
a. the Note Payment Account for the payment of principal to the extent of any unfunded Regular Principal Distribution Amount; and$0.00 
b. any Successor Servicer for the payment of any unfunded Transition Costs and Additional Servicing Fee$0.00 
54.Payment to Depositor if Reserve Account Balance exceeds Required Reserve Account Amount and to the extent no unfunded amounts described in Ln 55 exist$3,290.84 
55.Ending Balance (Ln51 + Ln52 - Ln53 - Ln54)$3,383,460.05 
56.Reserve Account Deficiency (Ln48 - Ln55)$0.00 
Instructions to the Trustee
57.Amount to be deposited from the Reserve Account into the Collection Account$0.00 
58.Amount to be paid to Servicer from the Collection Account$1,127,820.02 
59.Amount to be deposited from the Collection Account into the Note Payment Account$57,018,813.21 
60.Amount to be deposited from the Collection Account into the Certificate Payment Account$4,383,854.15 
61.Amount to be deposited from the Collection Account into the Reserve Account$0.00 
62.Amount to be deposited from the Reserve Account, if Reserve Account Balance exceeds Required Reserve Account Amount, into
a. the Note Payment Account for any unfunded Regular Principal Distributable Amount$0.00 
b. the Depositor, if no unfunded Regular Principal distributable amount exists$3,290.84 
63.Amount to be paid to Class A-1 Noteholders from the Note Payment Account$53,972,922.63 
64.Amount to be paid to Class A-2 Noteholders from the Note Payment Account$1,258,319.01 
65.Amount to be paid to Class A-3 Noteholders from the Note Payment Account$1,327,584.28 
66.Amount to be paid to Class A-4 Noteholders from the Note Payment Account$243,910.21 
67.Amount to be paid to Class B Noteholders from the Note Payment Account$73,677.69 
68.Amount to be paid to Class C Noteholders from the Note Payment Account$82,129.17 
69.Amount to be paid to Class D Noteholders from the Note Payment Account$60,270.22 
70.Amount to be paid to Certificateholders from the Certificate Payment Account with respect to Excess Collections$4,383,854.15 



Delinquency Activity
Number of LoansPrincipal Balance
71.Delinquency Analysis
a. 31 to 60 days past due430$5,658,189.51 
b. 61 to 90 days past due12$189,932.55 
c. 91 to 120 days past due1$15,798.90 
d. 121 or more days past due0$0.00 
e. Total Past Due (sum a - d)443$5,863,920.96 
f. Delinquent Loans as a percentage of end of period Pool Balance (Ln 71e / Ln 5)0.4510 %
72.Has a Delinquency Trigger Event occurred?No
Loss Activity
Number of LoansPrincipal Balance
73.Defaulted Receivables (charge-offs)0$0.00 
74.Recoveries0$0.00 
75.Net Losses (Ln 73 - Ln 74)$0.00 
76.Ratio of Net Losses to Beginning of Period Pool Balance (Ln 75 / Ln 1)0.0000 %
Cumulative Loss Activity
Number of LoansPrincipal Balance
77.Defaulted Receivables (charge-offs)0$0.00 
78.Recoveries0$0.00 
79.Cumulative Net Losses (Ln 77 - Ln 78)$0.00 
80.Ratio of Cumulative Net Losses to Initial Pool Balance (Ln 79 / Ln 7)0.0000 %
81.Average Net Loss on Defaulted Receivables$0.00 
Other Servicing Information
82.Principal Balance of Receivables extended during the Collection Period$1,194,082.69 
83.Pool Balance on the close of the last day of the preceding Collection Period$1,353,384,019.62 
84.Ratio of extensions to pool balance (Ln 82 / Ln 83)0.09 %




IN WITNESS WHEREOF, the undersigned has duly executed this certificate on August 10, 2026
 
CARMAX BUSINESS SERVICES, LLC
As Servicer
By:/s/ Greg Dostich
Name:Greg Dostich
Title:Vice President and Treasurer