Exhibit 99.1

MONTHLY SERVICER'S CERTIFICATE

CARMAX BUSINESS SERVICES, LLC

CARMAX AUTO OWNER TRUST

SERIES 2015-4



Collection Period		3/01/19-3/31/19
Determination Date		4/9/2019
Distribution Date		4/15/2019

Additional information, including defined terms, can be found in the prospectus on the SEC's EDGAR system (http://www.sec.gov) under File No. 333-189212-10.



Pool Balance
1.	Pool Balance on the close of the last day of the preceding Collection Period			$	201,420,075.70
2.	Collections allocable to Principal			$	13,114,916.46
3.	Purchase Amount allocable to Principal			$	0.00
4.	Defaulted Receivables			$	390,058.22
5.	Pool Balance on the close of the last day of the related Collection Period			$	187,915,101.02
	(Ln1 - Ln2 - Ln3 - Ln4)
6.	Total number of Receivables outstanding on the close of the last day of the related Collection Period			26,119
7.	Initial Pool Balance			$	1,050,000,018.44
		Beginning of Period		End of Period
8.	Note Balances
	a. Class A-1 Note Balance	$	0.00	$	0.00
	b. Class A-2a Note Balance	$	0.00	$	0.00
	c. Class A-2b Floating Rate Note Balance	$	0.00	$	0.00
	d. Class A-3 Note Balance	$	38,170,075.61	$	24,665,100.93
	e. Class A-4 Note Balance	$	90,270,000.00	$	90,270,000.00
	f. Class B Note Balance	$	19,430,000.00	$	19,430,000.00
	g. Class C Note Balance	$	22,050,000.00	$	22,050,000.00
	h. Class D Note Balance	$	26,250,000.00	$	26,250,000.00
	i. Note Balance (sum a - h)	$	196,170,075.61	$	182,665,100.93
9.	Pool Factors
	a. Class A-1 Note Pool Factor	0.0000000		0.0000000
	b. Class A-2a Note Pool Factor	0.0000000		0.0000000
	c. Class A-2b Floating Rate Note Pool Factor	0.0000000		0.0000000
	d. Class A-3 Note Pool Factor	0.1167281		0.0754284
	e. Class A-4 Note Pool Factor	1.0000000		1.0000000
	f. Class B Note Pool Factor	1.0000000		1.0000000
	g. Class C Note Pool Factor	1.0000000		1.0000000
	h. Class D Note Pool Factor	1.0000000		1.0000000
	i. Note Pool Factor	0.1868286		0.1739668
10.	Overcollateralization Target Amount			$	5,250,000.09
11.	Current overcollateralization amount (Pool Balance - Note Balance)			$	5,250,000.09
12.	Weighted Average Coupon			7.60		%
13.	Weighted Average Original Term	months		68.19
14.	Weighted Average Remaining Term	months		23.95
15.	1-Month LIBOR for the interest period ending 4/14/2019			2.48375		%
16.	Note Rate applicable to the Class A-2b notes for the interest period ending 4/14/2019			N/A
Collections
17.	Finance Charges:
	a. Collections allocable to Finance Charge			$	1,296,667.87
	b. Liquidation Proceeds allocable to Finance Charge			$	4,983.78
	c. Purchase Amount allocable to Finance Charge			$	0.00
	d. Available Finance Charge Collections (sum a - c)			$	1,301,651.65
18.	Principal:
	a. Collections allocable to Principal			$	13,114,916.46
	b. Liquidation Proceeds allocable to Principal			$	303,117.77
	c. Purchase Amount allocable to Principal			$	0.00
	d. Available Principal Collections (sum a - c)			$	13,418,034.23
19.	Total Finance Charge and Principal Collections (17d + 18d)			$	14,719,685.88
20.	Interest Income from Collection Account			$	24,270.18
21.	Simple Interest Advances			$	0.00
22.	Available Collections (Ln19 + 20 + 21)			$	14,743,956.06



Available Funds
23.	Available Collections	$	14,743,956.06
24.	Reserve Account Draw Amount	$	0.00
25.	Available Funds	$	14,743,956.06
Application of Available Funds
26.	Servicing Fee
	a. Monthly Servicing Fee	$	167,850.06
	b. Amount Unpaid from Prior Months	$	0.00
	c. Amount Paid	$	167,850.06
	d. Shortfall Amount (a + b - c)	$	0.00
27.	Unreimbursed Servicer Advances	$	0.00
28.	Successor Servicer Unpaid Transition Expenses and Indemnity Amounts (Capped at $175,000)
	a. Unpaid Transition Expenses and Indemnity Amounts (Capped at $175,000)	$	0.00
	b. Amount Paid	$	0.00
	c. Shortfall Amount (a - b)	$	0.00
29.	Class A Noteholder Interest Amounts
	a. Class A-1 Monthly Interest	$	0.00
	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)	$	0.00
	e. Class A-2a Monthly Interest	$	0.00
	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)	$	0.00
	i. Class A-2b Monthly Interest	$	0.00
	j. Additional Note Interest related to Class A-2b Monthly Interest	$	0.00
	k. Interest Due on Additional Note Interest related to Class A-2b Monthly Interest	$	0.00
	l. Total Class A-2b Note Interest (sum i - k)	$	0.00
	m. Class A-3 Monthly Interest	$	49,621.10
	n. Additional Note Interest related to Class A-3 Monthly Interest	$	0.00
	o. Interest Due on Additional Note Interest related to Class A-3 Monthly Interest	$	0.00
	p. Total Class A-3 Note Interest (sum m - o)	$	49,621.10
	m. Class A-4 Monthly Interest	$	137,661.75
	r. Additional Note Interest related to Class A-4 Monthly Interest	$	0.00
	s. Interest Due on Additional Note Interest related to Class A-4 Monthly Interest	$	0.00
	t. Total Class A-4 Note Interest (sum q - s)	$	137,661.75
30.	Priority Principal Distributable Amount	$	0.00
31.	Class B Noteholder Interest Amount
	a. Class B Monthly Interest	$	34,974.00
	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)	$	34,974.00
32.	Secondary Principal Distributable Amount	$	0.00
33.	Class C Noteholder Interest Amount
	a. Class C Monthly Interest	$	45,937.50
	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)	$	45,937.50
34.	Tertiary Principal Distributable Amount	$	0.00
35.	Class D Noteholder Interest Amount
	a. Class D Monthly Interest	$	65,625.00
	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)	$	65,625.00



36.	Quaternary Principal Distributable Amount	$	8,254,974.59
37.	Required Payment Amount (Ln 26 + Ln 28 + (sum of Ln 29 through Ln 36))	$	8,756,644.00
38.	Reserve Account Deficiency	$	0.00
39.	Regular Principal Distributable Amount	$	5,250,000.09
40.	Remaining Unpaid Servicer Transition Expenses, if any	$	0.00
41.	Additional Servicing Fees, if any	$	0.00
42.	Remaining Unpaid Successor Servicer Indemnity Amounts and Transition Expenses, if any	$	0.00
Collection Account Activity
43.	Deposits
	a. Total Daily Deposits of Finance Charge Collections	$	1,301,651.65
	b. Total Daily Deposits of Principal Collections	$	13,418,034.23
	c. Withdrawal from Reserve Account	$	0.00
	d. Interest Income	$	24,270.18
	e. Total Deposits to Collection Account (sum a - d)	$	14,743,956.06
44.	Withdrawals
	a. Servicing Fee and Unreimbursed Servicer Advances	$	167,850.06
	b. Successor Servicer Transition Expenses and Indemnity Amounts	$	0.00
	c. Deposit to Note Payment Account for Monthly Note Interest/Principal	$	13,838,794.03
	d. Deposit to Reserve Account	$	0.00
	e. Excess Collections (Deposit to Certificate Payment Account for payment to Certificateholder)	$	737,311.97
	f. Total Withdrawals from Collection Account (sum a - e)	$	14,743,956.06
Note Payment Account Activity
45.	Deposits
	a. Class A-1 Interest Distribution	$	0.00
	b. Class A-2a Interest Distribution	$	0.00
	c. Class A-2b Interest Distribution	$	0.00
	d. Class A-3 Interest Distribution	$	49,621.10
	e. Class A-4 Interest Distribution	$	137,661.75
	f. Class B Interest Distribution	$	34,974.00
	g. Class C Interest Distribution	$	45,937.50
	h. Class D Interest Distribution	$	65,625.00
	i. Class A-1 Principal Distribution	$	0.00
	j. Class A-2a Principal Distribution	$	0.00
	k. Class A-2b Principal Distribution	$	0.00
	l. Class A-3 Principal Distribution	$	13,504,974.68
	m. Class A-4 Principal Distribution	$	0.00
	n. Class B Principal Distribution	$	0.00
	o. Class C Principal Distribution	$	0.00
	p. Class D Principal Distribution	$	0.00
	q. Total Deposits to Note Payment Account (sum a - p)	$	13,838,794.03
46.	Withdrawals
	a. Class A-1 Distribution	$	0.00
	b. Class A-2a Distribution	$	0.00
	c. Class A-2b Distribution	$	0.00
	d. Class A-3 Distribution	$	13,554,595.78
	e. Class A-4 Distribution	$	137,661.75
	f. Class B Distribution	$	34,974.00
	g. Class C Distribution	$	45,937.50
	h. Class D Distribution	$	65,625.00
	i. Total Withdrawals from Note Payment Account (sum a - h)	$	13,838,794.03



Certificate Payment Account Activity
47.	Deposits
	a. Excess Collections	$	737,311.97
	b. Reserve Account surplus (Ln 57)	$	5,219.05
	c. Total Deposits to Certificate Payment Account (sum a - b)	$	742,531.02
48.	Withdrawals
	a. Certificateholder Distribution	$	742,531.02
	b. Total Withdrawals from Certificate Payment Account	$	742,531.02
Required Reserve Account Amount
49.	Lesser of: (a or b)
	a. $2,625,000.05	$	2,625,000.05
	b. Note Balance	$	182,665,100.93
50.	Required Reserve Account Amount	$	2,625,000.05
Reserve Account Reconciliation
51.	Beginning Balance (as of end of preceding Distribution Date)	$	2,625,000.05
52.	Investment Earnings	$	5,219.05
53.	Reserve Account Draw Amount	$	0.00
54.	Reserve Account Amount (Ln 51 + Ln 52 - Ln 53)	$	2,630,219.10
55.	Deposit from Available Funds (Ln 44d)	$	0.00
56.	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
57.	Payment to Certificateholder if Reserve Account Balance exceeds Required Reserve Account Amount and to the extent no unfunded amounts described in Ln 56 exist	$	5,219.05
58.	Ending Balance (Ln54 + Ln55 - Ln56 - Ln57)	$	2,625,000.05
59.	Reserve Account Deficiency (Ln50 - Ln58)	$	0.00
Instructions to the Trustee
60.	Amount to be deposited from the Reserve Account into the Collection Account	$	0.00
61.	Amount to be paid to Servicer from the Collection Account	$	167,850.06
62.	Amount to be deposited from the Collection Account into the Note Payment Account	$	13,838,794.03
63.	Amount to be deposited from the Collection Account into the Certificate Payment Account	$	737,311.97
64.	Amount to be deposited from the Collection Account into the Reserve Account	$	0.00
65.	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 Certificate Payment Account for payment to the Certificateholder, if no unfunded Regular Principal distributable amount exists	$	5,219.05
66.	Amount to be paid to Class A-1 Noteholders from the Note Payment Account	$	0.00
67.	Amount to be paid to Class A-2a Noteholders from the Note Payment Account	$	0.00
68.	Amount to be paid to Class A-2b Noteholders from the Note Payment Account	$	0.00
69.	Amount to be paid to Class A-3 Noteholders from the Note Payment Account	$	13,554,595.78
70.	Amount to be paid to Class A-4 Noteholders from the Note Payment Account	$	137,661.75
71.	Amount to be paid to Class B Noteholders from the Note Payment Account	$	34,974.00
72.	Amount to be paid to Class C Noteholders from the Note Payment Account	$	45,937.50
73.	Amount to be paid to Class D Noteholders from the Note Payment Account	$	65,625.00
74.	Amount to be paid to Certificateholders from the Certificate Payment Account with respect to Excess Collections and Reserve Account surplus	$	742,531.02



Delinquency Activity
		Number of Loans	Principal Balance
75.	Delinquency Analysis
	a. 31 to 60 days past due	672	$	6,774,931.30
	b. 61 to 90 days past due	275	$	2,819,319.91
	c. 91 to 120 days past due	89	$	854,660.63
	d. 121 or more days past due	1	$	9,298.74
	e. Total Past Due (sum a - d)	1,037	$	10,458,210.58
	f. Delinquent Loans as a percentage of end of period Pool Balance (Ln 75e / Ln 5)		5.5654		%

Loss Activity
		Number of Loans	Principal Balance

76.	Defaulted Receivables (charge-offs)	53	$	390,058.22
77.	Recoveries	202	$	308,101.55
78.	Net Losses (Ln 76 - Ln 77)		$	81,956.67
79.	Ratio of Net Losses to Beginning of Period Pool Balance (Ln 78 / Ln 1)		0.0407		%

Cumulative Loss Activity
		Number of Loans	Principal Balance

80.	Defaulted Receivables (charge-offs)	3,143	$	41,148,536.94
81.	Recoveries	2,646	$	18,201,847.03
82.	Cumulative Net Losses (Ln 80 - Ln 81)		$	22,946,689.91
83.	Ratio of Cumulative Net Losses to Initial Pool Balance (Ln 82 / Ln 7)		2.1854		%
84.	Average Net Loss on Defaulted Receivables		$	7,300.89

Servicer Covenant
85.	CarMax, Inc Consolidated Tangible Net Worth as of the end of the Related Fiscal Quarter		$	3,426,436,000.00
86.	Is CarMax, Inc Consolidated Tangible Net Worth greater than $1,000,000,000?		Yes

IN WITNESS WHEREOF, the undersigned has duly executed this certificate on April 9, 2019.



CARMAX BUSINESS SERVICES, LLC

As Servicer

By:	/s/ Enrique Mayor-Mora

Name:	Enrique Mayor-Mora

Title:	Vice President and Treasurer

CarMax Auto Owner Trust 2015-4 10-D