Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Summary Collateral Information
	Description
Group 1
Pool 2930	30/40YR MTA
Pool 2931	30/40YR MTA
Pool 2932	30/40YR MTA
Pool 2933	30/40YR MTA
Pool 2934	30/40YR MTA

General Information
Description	Total	Pool 2930	Pool 2931	Pool 2932	Pool 2933	Pool 2934
Weighted Average Pass Through Rate	5.41160%	5.36951%	5.56681%	5.43577%	5.39058%	5.34848%
Weighted Average Mortgage Interest Rate	6.97847%	7.24592%	6.97350%	7.14449%	6.75963%	6.80020%
Weighted Average Remaining Term (in Months)	372.30212	364.05419	376.35519	370.18501	373.33218	376.62276
Weighted Average Loan Age (in Months)	2.59838	2.81797	2.60681	2.81329	2.42519	2.32179
Average Ending Scheduled Principal Balance	$352,215.11	$244,279.38	$290,481.01	$266,365.51	$621,438.76	$588,089.26
Remaining Loan Count	2778	428	331	1306	317	396
Ending Scheduled Principal Balance	$978,453,576.02	$104,551,573.84	$96,149,212.71	$347,873,355.35	$196,996,086.25	$232,883,347.87

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

General Information (Continued)
Description	Group 1
Weighted Average Pass Through Rate	5.41160%
Weighted Average Mortgage Interest Rate	6.97847%
Weighted Average Remaining Term (in Months)	372.30212
Weighted Average Loan Age (in Months)	2.59838
Average Ending Scheduled Principal Balance	$352,215.11
Remaining Loan Count	2778
Ending Scheduled Principal Balance	$978,453,576.02

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Geographic Distribution
Total			Pool 2930			Pool 2931
State	Percent	Ending Scheduled Principal Balance	State	Percent	Ending Scheduled Principal Balance	State	Percent	Ending Scheduled Principal Balance
CA	$611,403,793.79	62.49%	CA	$34,839,225.56	33.32%	CA	$56,914,703.75	59.19%
FL	$116,146,295.12	11.87%	FL	$22,783,247.24	21.79%	FL	$8,991,319.84	9.35%
AZ	$39,888,103.01	4.08%	AZ	$9,058,402.69	8.66%	AZ	$5,971,250.78	6.21%
NV	$30,541,644.18	3.12%	NJ	$8,274,015.42	7.91%	NV	$5,084,217.32	5.29%
WA	$21,006,658.05	2.15%	NV	$3,570,263.83	3.41%	HI	$2,486,926.51	2.59%
OTHER	$159,467,081.87	16.30%	OTHER	$26,026,419.10	24.89%	OTHER	$16,700,794.51	17.37%

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Geographic Distribution
Pool 2932			Pool 2933			Pool 2934
State	Percent	Ending Scheduled Principal Balance	State	Percent	Ending Scheduled Principal Balance	State	Percent	Ending Scheduled Principal Balance
CA	$200,896,486.40	57.75%	CA	$147,519,340.42	74.88%	CA	$171,234,037.66	73.53%
FL	$49,664,631.57	14.28%	FL	$11,291,029.83	5.73%	FL	$23,416,066.64	10.05%
NV	$14,137,503.48	4.06%	VA	$5,515,359.93	2.80%	AZ	$6,370,953.63	2.74%
AZ	$13,914,771.58	4.00%	WA	$5,454,699.60	2.77%	NV	$5,264,647.10	2.26%
VA	$7,358,528.67	2.12%	NJ	$5,241,953.23	2.66%	VA	$5,060,070.97	2.17%
OTHER	$61,901,433.65	17.79%	OTHER	$21,973,703.24	11.15%	OTHER	$21,537,571.87	9.25%

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Geographic Distribution
Group 1
State	Percent	Ending Scheduled Principal Balance
CA	$611,403,793.79	62.49%
FL	$116,146,295.12	11.87%
AZ	$39,888,103.01	4.08%
NV	$30,541,644.18	3.12%
WA	$21,006,658.05	2.15%
OTHER	$159,467,081.87	16.30%

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Prepayment Information (all groups)
	1 Month	3 Month	6 Month	12 Month	Cumulative
PSA	1699.34667%	1699.34915%	1699.34915%	1699.34915%	1699.34915%
CPR	8.83110%	8.83111%	8.83111%	8.83111%	8.83111%
SMM	0.76751%	0.76751%	0.76751%	0.76751%	0.76751%

Trigger Events
	Trigger Flag
Optional Termination Date Has Occurred; 1=Yes, 0=No	0
Senior Prepayment Step-Down Has Occurred; 1=Yes, 0=No	0
Senior Credit Support Depletion Date Has Occurred; 1=Yes, 0=No	0

Comments

1. The Subordinate Certificates provide, to the limited extent described in the Prospectus Supplement, credit support, to certain Group 1, Group 2, Group3, Group 4, Group 5 Senior Certificates. The "Prospectus Supplement" is that certain Prospectus Supplement, dated May 25, 2006 to that certain Prospectus Supplement, dated January 6, 2006, to which certain Senior Certificates were offered.

2. The MBA method of delinquency calculation is used.

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Certificate Payment Summary Report
Class	CUSIP	Original Principal/Notional Balance	Beginning Principal/Notional Balance	Interest Distribution	Principal Distribution	Principal Loss	Deferred Interest	Total Distribution	Ending Principal/Notional Balance
1A	939345AA2	$76,071,000.00	$76,071,000.00	$316,391.97	$648,033.07	$0.00	$0.00	$964,425.04	$75,422,966.93
2A	939345AB0	$69,518,000.00	$69,518,000.00	$287,399.00	$108,423.31	$0.00	$0.00	$395,822.31	$69,409,576.69
3A	939345AC8	$251,313,000.00	$251,313,000.00	$1,032,687.00	$161,550.41	$0.00	$0.00	$1,194,237.41	$251,151,449.59
DA	939345AD6	$313,222,000.00	$313,222,000.00	$1,300,132.32	$3,151,712.92	$0.00	$0.00	$4,451,845.24	$310,070,287.08
DA_GRP4	XXXXXXXXX	$145,040,000.00	$145,040,000.00	$602,036.87	$3,110,143.79	$0.00	$0.00	$3,712,180.66	$141,929,856.21
DA_GRP5	XXXXXXXXX	$168,182,000.00	$168,182,000.00	$698,095.45	$41,569.13	$0.00	$0.00	$739,664.58	$168,140,430.87
CA1B	939345AE4	$99,225,000.00	$99,225,000.00	$386,306.02	$229,495.93	$0.00	$0.00	$615,801.95	$98,995,504.07
CA1B_GRP1	XXXXXXXXX	$19,017,000.00	$19,017,000.00	$74,037.61	$162,001.88	$0.00	$0.00	$236,039.49	$18,854,998.12
CA1B_GRP2	XXXXXXXXX	$17,380,000.00	$17,380,000.00	$67,664.39	$27,106.61	$0.00	$0.00	$94,771.00	$17,352,893.39
CA1B_GRP3	XXXXXXXXX	$62,828,000.00	$62,828,000.00	$244,604.03	$40,387.44	$0.00	$0.00	$284,991.47	$62,787,612.56
DA1B	939345AF1	$78,306,000.00	$78,306,000.00	$303,732.40	$787,928.35	$0.00	$0.00	$1,091,660.75	$77,518,071.65
DA1B_GRP4	XXXXXXXXX	$36,260,000.00	$36,260,000.00	$140,644.86	$777,535.95	$0.00	$0.00	$918,180.81	$35,482,464.05

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Certificate Payment Summary Report (Continued)
Class	CUSIP	Original Principal/Notional Balance	Beginning Principal/Notional Balance	Interest Distribution	Principal Distribution	Principal Loss	Deferred Interest	Total Distribution	Ending Principal/Notional Balance
DA1B_GRP5	XXXXXXXXX	$42,046,000.00	$42,046,000.00	$163,087.53	$10,392.41	$0.00	$0.00	$173,479.94	$42,035,607.59
X1	939345AG9	$0.00	$0.00	$66,735.54	$0.00	$0.00	$0.00	$66,735.54	$0.00
X1_IO_GRP1	XXXXXXXXX	$105,361,857.00	$105,361,857.00	$36,767.43	$0.00	$0.00	$0.00	$36,767.43	$104,551,573.84
X1_IO_GRP2	XXXXXXXXX	$96,285,987.00	$96,285,987.00	$18,229.92	$0.00	$0.00	$0.00	$18,229.92	$96,149,212.71
X1_IO_GRP4	XXXXXXXXX	$200,887,364.00	$200,887,364.00	$11,738.18	$0.00	$0.00	$0.00	$11,738.18	$196,996,086.25
X1_PO_GRP1	XXXXXXXXX	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
X1_PO_GRP2	XXXXXXXXX	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
X1_PO_GRP4	XXXXXXXXX	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
X2	939345AH7	$0.00	$0.00	$93,823.10	$0.00	$0.00	$0.00	$93,823.10	$0.00
X2_IO_GRP3	XXXXXXXXX	$348,078,673.00	$348,078,673.00	$88,248.27	$0.00	$0.00	$0.00	$88,248.27	$347,873,355.35
X2_IO_GRP5	XXXXXXXXX	$232,939,729.00	$232,939,729.00	$5,574.84	$0.00	$0.00	$0.00	$5,574.84	$232,883,347.87
X2_PO_GRP3	XXXXXXXXX	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
X2_PO_GRP5	XXXXXXXXX	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Certificate Payment Summary Report (Continued)
Class	CUSIP	Original Principal/Notional Balance	Beginning Principal/Notional Balance	Interest Distribution	Principal Distribution	Principal Loss	Deferred Interest	Total Distribution	Ending Principal/Notional Balance
X3	939345AJ3	$0.00	$0.00	$96,563.73	$0.00	$0.00	$0.00	$96,563.73	$92,880,492.99
X3_GRP2	XXXXXXXXX	$31,621,680.00	$31,621,680.00	$32,939.25	$0.00	$0.00	$0.00	$32,939.25	$31,681,727.64
X3_GRP4	XXXXXXXXX	$61,079,497.00	$61,079,497.00	$63,624.48	$0.00	$0.00	$0.00	$63,624.48	$61,198,765.35
X4	939345AK0	$0.00	$0.00	$144,634.75	$0.00	$0.00	$0.00	$144,634.75	$139,038,810.68
X4_GRP3	XXXXXXXXX	$62,405,544.00	$62,405,544.00	$65,005.78	$0.00	$0.00	$0.00	$65,005.78	$62,489,892.32
X4_GRP5	XXXXXXXXX	$76,443,817.00	$76,443,817.00	$79,628.98	$0.00	$0.00	$0.00	$79,628.98	$76,548,918.36
B1	939345AL8	$23,115,000.00	$23,115,000.00	$90,993.73	$3,082.92	$0.00	$0.00	$94,076.65	$23,111,917.08
B2	939345AM6	$14,753,000.00	$14,753,000.00	$58,502.36	$1,967.65	$0.00	$0.00	$60,470.01	$14,751,032.35
B3	939345AN4	$6,884,000.00	$6,884,000.00	$27,447.35	$918.14	$0.00	$0.00	$28,365.49	$6,883,081.86
B4	939345AP9	$6,884,000.00	$6,884,000.00	$27,795.37	$918.14	$0.00	$0.00	$28,713.51	$6,883,081.86
B5	939345AQ7	$5,901,000.00	$5,901,000.00	$24,039.42	$787.03	$0.00	$0.00	$24,826.45	$5,900,212.97
B6	939345AR5	$3,934,000.00	$3,934,000.00	$16,168.34	$524.69	$0.00	$0.00	$16,693.03	$3,933,475.31
B7	939345AS3	$3,934,000.00	$3,934,000.00	$18,015.14	$524.69	$0.00	$0.00	$18,539.83	$3,933,475.31

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Certificate Payment Summary Report (Continued)
Class	CUSIP	Original Principal/Notional Balance	Beginning Principal/Notional Balance	Interest Distribution	Principal Distribution	Principal Loss	Deferred Interest	Total Distribution	Ending Principal/Notional Balance
B8	939345AT1	$2,950,000.00	$2,950,000.00	$14,041.70	$393.45	$0.00	$0.00	$14,435.15	$2,949,606.55
B9	939345AU8	$3,934,000.00	$3,934,000.00	$19,435.75	$524.69	$0.00	$0.00	$19,960.44	$3,933,475.31
B10	939345BA1	$3,934,000.00	$3,934,000.00	$19,435.75	$524.69	$0.00	$0.00	$19,960.44	$3,933,475.31
B11	939345BB9	$3,442,000.00	$3,442,000.00	$17,005.05	$459.07	$0.00	$0.00	$17,464.12	$3,441,540.93
B12	939345BC7	$1,967,000.00	$1,967,000.00	$9,717.87	$262.34	$0.00	$0.00	$9,980.21	$1,966,737.66
B13	939345BD5	$7,376,000.00	$7,376,000.00	$36,440.80	$983.76	$0.00	$0.00	$37,424.56	$7,375,016.24
B14	939345BE3	$6,890,510.00	$6,890,510.00	$34,042.25	$919.01	$0.00	$0.00	$34,961.26	$6,889,590.99
PPP1	939345BF0	$100.00	$100.00	$16,435.68	$0.00	$0.00	$0.00	$16,435.68	$100.00
PPP2	939345AV6	$100.00	$100.00	$26,921.02	$0.00	$0.00	$0.00	$26,921.02	$100.00
R	939345AZ7	$100.00	$100.00	$0.43	$100.00	$0.00	$0.00	$100.43	$0.00
R_SYN	XXXXXXXXX	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
TFEE	XXXXXXXXX	$0.00	$0.00	$819.63	$0.00	$0.00	$0.00	$819.63	$0.00
Total*		$983,553,810.00	$983,553,810.00	$4,484,843.84	$5,100,034.26	$0.00	$0.00	$9,584,878.10	$978,453,775.74

*Total balances exclude notional balances.

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Total Funds Available for Distribution
PRINCIPAL BALANCE
Scheduled Principal Received or Advanced	($2,467,766.91)
Unscheduled Principal	$193,620.79
Prepayments in Full	$7,374,180.39
Repurchases	$0.00
Liquidations	$0.00
Total Principal	$5,100,034.27
INTEREST
Accrued Interest at Gross Rate	$5,719,750.86
Relief Act Shortfall	$0.00
Prepayment Interest Shortfall	$0.00
Servicing Fees	$1,284,252.27
Other	$0.00
Total Interest	$4,435,498.59
ADDITIONAL FUNDS
Excess Liquidation Proceeds	$0.00
Subsequent Recoveries	$0.00
Prepayment Penalties	$43,356.70

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Total Funds Available for Distribution
ADDITIONAL FUNDS
Other	$0.00
Total Additional Funds	$43,356.70
Total Funds Available for Distribution	$9,535,532.86

Certificate Payment Report - Principal
Class	CUSIP	Beginning Principal/Notional Balance	Principal Distribution	Principal Loss	Principal Reimbursed	Subsequent Recoveries	Deferred Interest	Total Principal Distribution	Ending Principal/Notional Balance
1A	939345AA2	$76,071,000.00	$648,033.07	$0.00	$0.00	$0.00	$0.00	$648,033.07	$75,422,966.93
2A	939345AB0	$69,518,000.00	$108,423.31	$0.00	$0.00	$0.00	$0.00	$108,423.31	$69,409,576.69
3A	939345AC8	$251,313,000.00	$161,550.41	$0.00	$0.00	$0.00	$0.00	$161,550.41	$251,151,449.59
DA	939345AD6	$313,222,000.00	$3,151,712.92	$0.00	$0.00	$0.00	$0.00	$3,151,712.92	$310,070,287.08
DA_GRP4	XXXXXXXXX	$145,040,000.00	$3,110,143.79	$0.00	$0.00	$0.00	$0.00	$3,110,143.79	$141,929,856.21
DA_GRP5	XXXXXXXXX	$168,182,000.00	$41,569.13	$0.00	$0.00	$0.00	$0.00	$41,569.13	$168,140,430.87
CA1B	939345AE4	$99,225,000.00	$229,495.93	$0.00	$0.00	$0.00	$0.00	$229,495.93	$98,995,504.07
CA1B_GRP1	XXXXXXXXX	$19,017,000.00	$162,001.88	$0.00	$0.00	$0.00	$0.00	$162,001.88	$18,854,998.12
CA1B_GRP2	XXXXXXXXX	$17,380,000.00	$27,106.61	$0.00	$0.00	$0.00	$0.00	$27,106.61	$17,352,893.39

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Certificate Payment Report - Principal (Continued)
Class	CUSIP	Beginning Principal/Notional Balance	Principal Distribution	Principal Loss	Principal Reimbursed	Subsequent Recoveries	Deferred Interest	Total Principal Distribution	Ending Principal/Notional Balance
CA1B_GRP3	XXXXXXXXX	$62,828,000.00	$40,387.44	$0.00	$0.00	$0.00	$0.00	$40,387.44	$62,787,612.56
DA1B	939345AF1	$78,306,000.00	$787,928.35	$0.00	$0.00	$0.00	$0.00	$787,928.35	$77,518,071.65
DA1B_GRP4	XXXXXXXXX	$36,260,000.00	$777,535.95	$0.00	$0.00	$0.00	$0.00	$777,535.95	$35,482,464.05
DA1B_GRP5	XXXXXXXXX	$42,046,000.00	$10,392.41	$0.00	$0.00	$0.00	$0.00	$10,392.41	$42,035,607.59
X1	939345AG9	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
X1_IO_GRP1	XXXXXXXXX	$105,361,857.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$104,551,573.84
X1_IO_GRP2	XXXXXXXXX	$96,285,987.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$96,149,212.71
X1_IO_GRP4	XXXXXXXXX	$200,887,364.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$196,996,086.25
X1_PO_GRP1	XXXXXXXXX	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
X1_PO_GRP2	XXXXXXXXX	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
X1_PO_GRP4	XXXXXXXXX	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
X2	939345AH7	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
X2_IO_GRP3	XXXXXXXXX	$348,078,673.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$347,873,355.35

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Certificate Payment Report - Principal (Continued)
Class	CUSIP	Beginning Principal/Notional Balance	Principal Distribution	Principal Loss	Principal Reimbursed	Subsequent Recoveries	Deferred Interest	Total Principal Distribution	Ending Principal/Notional Balance
X2_IO_GRP5	XXXXXXXXX	$232,939,729.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$232,883,347.87
X2_PO_GRP3	XXXXXXXXX	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
X2_PO_GRP5	XXXXXXXXX	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
X3	939345AJ3	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$92,880,492.99
X3_GRP2	XXXXXXXXX	$31,621,680.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$31,681,727.64
X3_GRP4	XXXXXXXXX	$61,079,497.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$61,198,765.35
X4	939345AK0	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$139,038,810.68
X4_GRP3	XXXXXXXXX	$62,405,544.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$62,489,892.32
X4_GRP5	XXXXXXXXX	$76,443,817.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$76,548,918.36
B1	939345AL8	$23,115,000.00	$3,082.92	$0.00	$0.00	$0.00	$0.00	$3,082.92	$23,111,917.08
B2	939345AM6	$14,753,000.00	$1,967.65	$0.00	$0.00	$0.00	$0.00	$1,967.65	$14,751,032.35
B3	939345AN4	$6,884,000.00	$918.14	$0.00	$0.00	$0.00	$0.00	$918.14	$6,883,081.86
B4	939345AP9	$6,884,000.00	$918.14	$0.00	$0.00	$0.00	$0.00	$918.14	$6,883,081.86

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Certificate Payment Report - Principal (Continued)
Class	CUSIP	Beginning Principal/Notional Balance	Principal Distribution	Principal Loss	Principal Reimbursed	Subsequent Recoveries	Deferred Interest	Total Principal Distribution	Ending Principal/Notional Balance
B5	939345AQ7	$5,901,000.00	$787.03	$0.00	$0.00	$0.00	$0.00	$787.03	$5,900,212.97
B6	939345AR5	$3,934,000.00	$524.69	$0.00	$0.00	$0.00	$0.00	$524.69	$3,933,475.31
B7	939345AS3	$3,934,000.00	$524.69	$0.00	$0.00	$0.00	$0.00	$524.69	$3,933,475.31
B8	939345AT1	$2,950,000.00	$393.45	$0.00	$0.00	$0.00	$0.00	$393.45	$2,949,606.55
B9	939345AU8	$3,934,000.00	$524.69	$0.00	$0.00	$0.00	$0.00	$524.69	$3,933,475.31
B10	939345BA1	$3,934,000.00	$524.69	$0.00	$0.00	$0.00	$0.00	$524.69	$3,933,475.31
B11	939345BB9	$3,442,000.00	$459.07	$0.00	$0.00	$0.00	$0.00	$459.07	$3,441,540.93
B12	939345BC7	$1,967,000.00	$262.34	$0.00	$0.00	$0.00	$0.00	$262.34	$1,966,737.66
B13	939345BD5	$7,376,000.00	$983.76	$0.00	$0.00	$0.00	$0.00	$983.76	$7,375,016.24
B14	939345BE3	$6,890,510.00	$919.01	$0.00	$0.00	$0.00	$0.00	$919.01	$6,889,590.99
PPP1	939345BF0	$100.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$100.00
PPP2	939345AV6	$100.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$100.00
R	939345AZ7	$100.00	$100.00	$0.00	$0.00	$0.00	$0.00	$100.00	$0.00

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Certificate Payment Report - Principal (Continued)
Class	CUSIP	Beginning Principal/Notional Balance	Principal Distribution	Principal Loss	Principal Reimbursed	Subsequent Recoveries	Deferred Interest	Total Principal Distribution	Ending Principal/Notional Balance
R_SYN	XXXXXXXXX	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
TFEE	XXXXXXXXX	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
Total *		$983,553,810.00	$5,100,034.26	$0.00	$0.00	$0.00	$0.00	$5,100,034.26	$978,453,775.74

*Total balances exclude notional balances.

Certificate Payment Report - Interest
Class	Beginning Principal/Notional Balance	Interest Rate Accrued	Interest Rate Paid	Interest Accrued	Prepayment Interest Shortfall	Relief Act Shortfall	Other Interest Shortfall	Unscheduled Interest	Interest Reimbursed	Carryforward Amount Paid	Total Interest Distributed	Total Carryforward Amount Remaining
1A	$76,071,000.00	4.9910000000%	4.9910000000%	$316,391.97	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$316,391.97	$0.00
2A	$69,518,000.00	4.9610000000%	4.9610000000%	$287,399.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$287,399.00	$0.00
3A	$251,313,000.00	4.9310000000%	4.9310000000%	$1,032,687.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$1,032,687.00	$0.00
DA	$313,222,000.00	4.9810000000%	4.9810000000%	$1,300,132.32	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$1,300,132.32	$0.00
DA_GRP4	$145,040,000.00	4.9810000000%	4.9810000000%	$602,036.87	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$602,036.87	$0.00

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Certificate Payment Report - Interest (Continued)
Class	Beginning Principal/Notional Balance	Interest Rate Accrued	Interest Rate Paid	Interest Accrued	Prepayment Interest Shortfall	Relief Act Shortfall	Other Interest Shortfall	Unscheduled Interest	Interest Reimbursed	Carryforward Amount Paid	Total Interest Distributed	Total Carryforward Amount Remaining
DA_GRP5	$168,182,000.00	4.9810000000%	4.9810000000%	$698,095.45	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$698,095.45	$0.00
CA1B	$99,225,000.00	5.3906300000%	5.3906300000%	$386,306.02	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$386,306.02	$0.00
CA1B_GRP1	$19,017,000.00	5.3906300000%	5.3906300000%	$74,037.61	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$74,037.61	$0.00
CA1B_GRP2	$17,380,000.00	5.3906300000%	5.3906300000%	$67,664.39	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$67,664.39	$0.00
CA1B_GRP3	$62,828,000.00	5.3906300000%	5.3906300000%	$244,604.03	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$244,604.03	$0.00
DA1B	$78,306,000.00	5.3706300000%	5.3706300000%	$303,732.40	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$303,732.40	$0.00
DA1B_GRP4	$36,260,000.00	5.3706300000%	5.3706300000%	$140,644.86	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$140,644.86	$0.00
DA1B_GRP5	$42,046,000.00	5.3706300000%	5.3706300000%	$163,087.53	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$163,087.53	$0.00
X1	$0.00	0.0000000000%	0.0000000000%	$66,735.54	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$66,735.54	$0.00
X1_IO_GRP1	$105,361,857.00	0.4187560944%	0.4187560944%	$36,767.43	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$36,767.43	$0.00
X1_IO_GRP2	$96,285,987.00	0.2271972112%	0.2271972112%	$18,229.92	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$18,229.92	$0.00
X1_IO_GRP4	$200,887,364.00	0.0701179881%	0.0701179881%	$11,738.18	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$11,738.18	$0.00
X1_PO_GRP1	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Certificate Payment Report - Interest (Continued)
Class	Beginning Principal/Notional Balance	Interest Rate Accrued	Interest Rate Paid	Interest Accrued	Prepayment Interest Shortfall	Relief Act Shortfall	Other Interest Shortfall	Unscheduled Interest	Interest Reimbursed	Carryforward Amount Paid	Total Interest Distributed	Total Carryforward Amount Remaining
X1_PO_GRP2	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
X1_PO_GRP4	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
X2	$0.00	0.0000000000%	0.0000000000%	$93,823.10	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$93,823.10	$0.00
X2_IO_GRP3	$348,078,673.00	0.3042355831%	0.3042355831%	$88,248.27	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$88,248.27	$0.00
X2_IO_GRP5	$232,939,729.00	0.0287190310%	0.0287190310%	$5,574.84	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$5,574.84	$0.00
X2_PO_GRP3	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
X2_PO_GRP5	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
X3	$0.00	0.0000000000%	0.0000000000%	$96,563.73	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$96,563.73	$0.00
X3_GRP2	$31,621,680.00	1.2500000000%	1.2500000000%	$32,939.25	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$32,939.25	$0.00
X3_GRP4	$61,079,497.00	1.2500000000%	1.2500000000%	$63,624.48	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$63,624.48	$0.00
X4	$0.00	0.0000000000%	0.0000000000%	$144,634.75	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$144,634.75	$0.00
X4_GRP3	$62,405,544.00	1.2500000000%	1.2500000000%	$65,005.78	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$65,005.78	$0.00
X4_GRP5	$76,443,817.00	1.2500000000%	1.2500000000%	$79,628.98	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$79,628.98	$0.00

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Certificate Payment Report - Interest (Continued)
Class	Beginning Principal/Notional Balance	Interest Rate Accrued	Interest Rate Paid	Interest Accrued	Prepayment Interest Shortfall	Relief Act Shortfall	Other Interest Shortfall	Unscheduled Interest	Interest Reimbursed	Carryforward Amount Paid	Total Interest Distributed	Total Carryforward Amount Remaining
B1	$23,115,000.00	5.4506300000%	5.4506300000%	$90,993.73	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$90,993.73	$0.00
B2	$14,753,000.00	5.4906300000%	5.4906300000%	$58,502.36	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$58,502.36	$0.00
B3	$6,884,000.00	5.5206300000%	5.5206300000%	$27,447.35	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$27,447.35	$0.00
B4	$6,884,000.00	5.5906300000%	5.5906300000%	$27,795.37	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$27,795.37	$0.00
B5	$5,901,000.00	5.6406300000%	5.6406300000%	$24,039.42	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$24,039.42	$0.00
B6	$3,934,000.00	5.6906300000%	5.6906300000%	$16,168.34	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$16,168.34	$0.00
B7	$3,934,000.00	6.3406300000%	6.3406300000%	$18,015.14	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$18,015.14	$0.00
B8	$2,950,000.00	6.5906300000%	6.5906300000%	$14,041.70	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$14,041.70	$0.00
B9	$3,934,000.00	6.8406300000%	6.8406300000%	$19,435.75	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$19,435.75	$0.00
B10	$3,934,000.00	6.8406300000%	6.8406300000%	$19,435.75	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$19,435.75	$0.00
B11	$3,442,000.00	6.8406300000%	6.8406300000%	$17,005.05	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$17,005.05	$0.00
B12	$1,967,000.00	6.8406300000%	6.8406300000%	$9,717.87	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$9,717.87	$0.00
B13	$7,376,000.00	6.8406300000%	6.8406300000%	$36,440.80	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$36,440.80	$0.00

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Certificate Payment Report - Interest (Continued)
Class	Beginning Principal/Notional Balance	Interest Rate Accrued	Interest Rate Paid	Interest Accrued	Prepayment Interest Shortfall	Relief Act Shortfall	Other Interest Shortfall	Unscheduled Interest	Interest Reimbursed	Carryforward Amount Paid	Total Interest Distributed	Total Carryforward Amount Remaining
B14	$6,890,510.00	6.8406300000%	6.8406300000%	$34,042.25	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$34,042.25	$0.00
PPP1	$100.00	0.0000000000%	236673.7920000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$16,435.68	$0.00
PPP2	$100.00	0.0000000000%	387662.6880000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$26,921.02	$0.00
R	$100.00	5.3700000000%	6.1920000000%	$0.37	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.43	$0.00
R_SYN	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
TFEE	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$819.63	$0.00
Total *	$983,553,810.00			$4,441,487.08	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$4,484,843.84	$0.00

*Total balances exclude notional balances.

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Principal Factors Report
Class	Original Scheduled Balance	Beginning Principal/Notional Balance	Principal Loss	Principal Reimbursed	Subsequent Recoveries	Deferred Interest	Total Principal	Ending Principal/Notional Balance Percent	Ending Principal/Notional Balance
1A	$76,071,000.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	8.51879258	0.9914812074	991.48120742
2A	$69,518,000.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	1.55964369	0.9984403563	998.44035631
3A	$251,313,000.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.64282552	0.9993571745	999.35717448
DA	$313,222,000.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	10.06223356	0.9899377664	989.93776644
DA_GRP4	$145,040,000.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	21.44335211	0.9785566479	978.55664789
DA_GRP5	$168,182,000.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.24716753	0.9997528325	999.75283247
CA1B	$99,225,000.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	2.31288415	0.9976871158	997.68711585
CA1B_GRP1	$19,017,000.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	8.51879266	0.9914812073	991.48120734
CA1B_GRP2	$17,380,000.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	1.55964384	0.9984403562	998.44035616
CA1B_GRP3	$62,828,000.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.64282549	0.9993571745	999.35717451
DA1B	$78,306,000.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	10.06217084	0.9899378292	989.93782916

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Principal Factors Report (Continued)
Class	Original Scheduled Balance	Beginning Principal/Notional Balance	Principal Loss	Principal Reimbursed	Subsequent Recoveries	Deferred Interest	Total Principal	Ending Principal/Notional Balance Percent	Ending Principal/Notional Balance
DA1B_GRP4	$36,260,000.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	21.44335218	0.9785566478	978.55664782
DA1B_GRP5	$42,046,000.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.24716763	0.9997528324	999.75283237
X1	$0.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
X1_IO_GRP1	$105,361,857.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.9923095209	992.30952089
X1_IO_GRP2	$96,285,987.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.9985794995	998.57949953
X1_IO_GRP4	$200,887,364.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.9806295544	980.62955443
X1_PO_GRP1	$0.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
X1_PO_GRP2	$0.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
X1_PO_GRP4	$0.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
X2	$0.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
X2_IO_GRP3	$348,078,673.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.9994101401	999.41014010
X2_IO_GRP5	$232,939,729.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.9997579583	999.75795829
X2_PO_GRP3	$0.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Principal Factors Report (Continued)
Class	Original Scheduled Balance	Beginning Principal/Notional Balance	Principal Loss	Principal Reimbursed	Subsequent Recoveries	Deferred Interest	Total Principal	Ending Principal/Notional Balance Percent	Ending Principal/Notional Balance
X2_PO_GRP5	$0.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
X3	$0.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
X3_GRP2	$31,621,680.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	1.0018989390	1,001.89893896
X3_GRP4	$61,079,497.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	1.0019526741	1,001.95267407
X4	$0.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
X4_GRP3	$62,405,544.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	1.0013516158	1,001.35161581
X4_GRP5	$76,443,817.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	1.0013748837	1,001.37488373
B1	$23,115,000.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.13337313	0.9998666269	999.86662687
B2	$14,753,000.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.13337287	0.9998666271	999.86662713
B3	$6,884,000.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.13337304	0.9998666270	999.86662696
B4	$6,884,000.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.13337304	0.9998666270	999.86662696
B5	$5,901,000.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.13337231	0.9998666277	999.86662769
B6	$3,934,000.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.13337316	0.9998666268	999.86662684

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Principal Factors Report (Continued)
Class	Original Scheduled Balance	Beginning Principal/Notional Balance	Principal Loss	Principal Reimbursed	Subsequent Recoveries	Deferred Interest	Total Principal	Ending Principal/Notional Balance Percent	Ending Principal/Notional Balance
B7	$3,934,000.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.13337316	0.9998666268	999.86662684
B8	$2,950,000.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.13337288	0.9998666271	999.86662712
B9	$3,934,000.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.13337316	0.9998666268	999.86662684
B10	$3,934,000.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.13337316	0.9998666268	999.86662684
B11	$3,442,000.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.13337304	0.9998666270	999.86662696
B12	$1,967,000.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.13337062	0.9998666294	999.86662938
B13	$7,376,000.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.13337310	0.9998666269	999.86662690
B14	$6,890,510.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.13337329	0.9998666267	999.86662671
PPP1	$100.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	1.0000000000	1,000.00000000
PPP2	$100.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	1.0000000000	1,000.00000000
R	$100.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	1000.00000000	0.0000000000	0.00000000
R_SYN	$0.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
TFEE	$0.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Principal Factors Report (Continued)
Class	Original Scheduled Balance	Beginning Principal/Notional Balance	Principal Loss	Principal Reimbursed	Subsequent Recoveries	Deferred Interest	Total Principal	Ending Principal/Notional Balance Percent	Ending Principal/Notional Balance

Interest Factors Report
Class	Original Balance	Interest Rate Accrued	Interest Rate Paid	Current Month Interest Accrued	Prepayment Interest Shortfall	Relief Act Interest Shortfall	Other Interest Shortfall	Unscheduled Interest	Interest Reimbursed	Carryforward Amount Paid	Deferred Interest	Total Interest Distribution	Total Carryforward Amount Remaining
1A	$76,071,000.00	4.9910000000%	4.9910000000%	4.15916670	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	4.15916670	0.00000000
2A	$69,518,000.00	4.9610000000%	4.9610000000%	4.13416669	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	4.13416669	0.00000000
3A	$251,313,000.00	4.9310000000%	4.9310000000%	4.10916666	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	4.10916666	0.00000000
DA	$313,222,000.00	4.9810000000%	4.9810000000%	4.15083334	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	4.15083334	0.00000000
DA_GRP4	$145,040,000.00	4.9810000000%	4.9810000000%	4.15083336	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	4.15083336	0.00000000
DA_GRP5	$168,182,000.00	4.9810000000%	4.9810000000%	4.15083332	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	4.15083332	0.00000000
CA1B	$99,225,000.00	5.3906300000%	5.3906300000%	3.89323275	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	3.89323275	0.00000000
CA1B_GRP1	$19,017,000.00	5.3906300000%	5.3906300000%	3.89323290	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	3.89323290	0.00000000
CA1B_GRP2	$17,380,000.00	5.3906300000%	5.3906300000%	3.89323303	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	3.89323303	0.00000000

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Interest Factors Report (Continued)
Class	Original Balance	Interest Rate Accrued	Interest Rate Paid	Current Month Interest Accrued	Prepayment Interest Shortfall	Relief Act Interest Shortfall	Other Interest Shortfall	Unscheduled Interest	Interest Reimbursed	Carryforward Amount Paid	Deferred Interest	Total Interest Distribution	Total Carryforward Amount Remaining
CA1B_GRP3	$62,828,000.00	5.3906300000%	5.3906300000%	3.89323279	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	3.89323279	0.00000000
DA1B	$78,306,000.00	5.3706300000%	5.3706300000%	3.87878834	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	3.87878834	0.00000000
DA1B_GRP4	$36,260,000.00	5.3706300000%	5.3706300000%	3.87878820	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	3.87878820	0.00000000
DA1B_GRP5	$42,046,000.00	5.3706300000%	5.3706300000%	3.87878823	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	3.87878823	0.00000000
X1	$0.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
X1_IO_GRP1	$105,361,857.00	0.4187560944%	0.4187560944%	0.34896338	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.34896338	0.00000000
X1_IO_GRP2	$96,285,987.00	0.2271972112%	0.2271972112%	0.18933098	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.18933098	0.00000000
X1_IO_GRP4	$200,887,364.00	0.0701179881%	0.0701179881%	0.05843165	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.05843165	0.00000000
X1_PO_GRP1	$0.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
X1_PO_GRP2	$0.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
X1_PO_GRP4	$0.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
X2	$0.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
X2_IO_GRP3	$348,078,673.00	0.3042355831%	0.3042355831%	0.25352967	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.25352967	0.00000000

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Interest Factors Report (Continued)
Class	Original Balance	Interest Rate Accrued	Interest Rate Paid	Current Month Interest Accrued	Prepayment Interest Shortfall	Relief Act Interest Shortfall	Other Interest Shortfall	Unscheduled Interest	Interest Reimbursed	Carryforward Amount Paid	Deferred Interest	Total Interest Distribution	Total Carryforward Amount Remaining
X2_IO_GRP5	$232,939,729.00	0.0287190310%	0.0287190310%	0.02393254	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.02393254	0.00000000
X2_PO_GRP3	$0.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
X2_PO_GRP5	$0.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
X3	$0.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
X3_GRP2	$31,621,680.00	1.2500000000%	1.2500000000%	1.04166667	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	1.04166667	0.00000000
X3_GRP4	$61,079,497.00	1.2500000000%	1.2500000000%	1.04166673	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	1.04166673	0.00000000
X4	$0.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
X4_GRP3	$62,405,544.00	1.2500000000%	1.2500000000%	1.04166675	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	1.04166675	0.00000000
X4_GRP5	$76,443,817.00	1.2500000000%	1.2500000000%	1.04166672	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	1.04166672	0.00000000
B1	$23,115,000.00	5.4506300000%	5.4506300000%	3.93656630	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	3.93656630	0.00000000
B2	$14,753,000.00	5.4906300000%	5.4906300000%	3.96545516	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	3.96545516	0.00000000
B3	$6,884,000.00	5.5206300000%	5.5206300000%	3.98712231	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	3.98712231	0.00000000
B4	$6,884,000.00	5.5906300000%	5.5906300000%	4.03767722	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	4.03767722	0.00000000

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Interest Factors Report (Continued)
Class	Original Balance	Interest Rate Accrued	Interest Rate Paid	Current Month Interest Accrued	Prepayment Interest Shortfall	Relief Act Interest Shortfall	Other Interest Shortfall	Unscheduled Interest	Interest Reimbursed	Carryforward Amount Paid	Deferred Interest	Total Interest Distribution	Total Carryforward Amount Remaining
B5	$5,901,000.00	5.6406300000%	5.6406300000%	4.07378749	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	4.07378749	0.00000000
B6	$3,934,000.00	5.6906300000%	5.6906300000%	4.10989832	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	4.10989832	0.00000000
B7	$3,934,000.00	6.3406300000%	6.3406300000%	4.57934418	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	4.57934418	0.00000000
B8	$2,950,000.00	6.5906300000%	6.5906300000%	4.75989831	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	4.75989831	0.00000000
B9	$3,934,000.00	6.8406300000%	6.8406300000%	4.94045501	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	4.94045501	0.00000000
B10	$3,934,000.00	6.8406300000%	6.8406300000%	4.94045501	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	4.94045501	0.00000000
B11	$3,442,000.00	6.8406300000%	6.8406300000%	4.94045613	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	4.94045613	0.00000000
B12	$1,967,000.00	6.8406300000%	6.8406300000%	4.94045247	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	4.94045247	0.00000000
B13	$7,376,000.00	6.8406300000%	6.8406300000%	4.94045553	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	4.94045553	0.00000000
B14	$6,890,510.00	6.8406300000%	6.8406300000%	4.94045434	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	4.94045434	0.00000000
PPP1	$100.00	0.0000000000%	236673.7920000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	164,356.80000000	0.00000000
PPP2	$100.00	0.0000000000%	387662.6880000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	269,210.20000000	0.00000000
R	$100.00	5.3700000000%	6.1920000000%	3.70000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	4.30000000	0.00000000

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Interest Factors Report (Continued)
Class	Original Balance	Interest Rate Accrued	Interest Rate Paid	Current Month Interest Accrued	Prepayment Interest Shortfall	Relief Act Interest Shortfall	Other Interest Shortfall	Unscheduled Interest	Interest Reimbursed	Carryforward Amount Paid	Deferred Interest	Total Interest Distribution	Total Carryforward Amount Remaining
R_SYN	$0.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
TFEE	$0.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Collateral Report Pool 2930
LOAN COUNT
Original Loan Count	431
Beginning Loan Count	431
Loans Added	0
Loans Prepaid-in-full	3
Loans Liquidated-in-full	0
Loans Repurchased	0
Ending Loan Count	428
PRINCIPAL BALANCE
Original Scheduled Principal Balance	$105,361,857.06
Beginning Scheduled Principal Balance	$105,361,857.06
Scheduled Principal Received or Advanced	($283,438.14)
Unscheduled Principal	$25,890.29
Prepayments-in-full	$1,067,831.07

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Collateral Report Pool 2930 (Continued)
PRINCIPAL BALANCE
Liquidations-in-full	$0.00
Repurchases	$0.00
Principal Losses	$0.00
Ending Scheduled Principal Balance	$104,551,573.84
INTEREST
Accrued Interest at Gross Rate	$636,203.33
Unscheduled Interest	$0.00
Uncollected Interest	($25.37)
Relief Act Shortfall	$0.00
Prepayment Interest Shortfall	$0.00
Other Interest Shortfall	$0.00

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Collateral Report Pool 2930 (Continued)
FEES
Servicing Fees	$164,751.94
Other Fees	$0.00
ADDITIONAL FUNDS
Excess Liquidation Proceeds	$0.00
Subsequent Recoveries	$0.00
Prepayment Penalties	$16,435.68
Other	$0.00

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Collateral Report Pool 2931
LOAN COUNT
Original Loan Count	332
Beginning Loan Count	332
Loans Added	0
Loans Prepaid-in-full	1
Loans Liquidated-in-full	0
Loans Repurchased	0
Ending Loan Count	331
PRINCIPAL BALANCE
Original Scheduled Principal Balance	$96,285,987.04
Beginning Scheduled Principal Balance	$96,285,987.04
Scheduled Principal Received or Advanced	($239,086.96)
Unscheduled Principal	$22,841.75
Prepayments-in-full	$353,019.54

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Collateral Report Pool 2931 (Continued)
PRINCIPAL BALANCE
Liquidations-in-full	$0.00
Repurchases	$0.00
Principal Losses	$0.00
Ending Scheduled Principal Balance	$96,149,212.71
INTEREST
Accrued Interest at Gross Rate	$559,541.86
Unscheduled Interest	$0.00
Uncollected Interest	($643.28)
Relief Act Shortfall	$0.00
Prepayment Interest Shortfall	$0.00
Other Interest Shortfall	$0.00

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Collateral Report Pool 2931 (Continued)
FEES
Servicing Fees	$112,870.72
Other Fees	$0.00
ADDITIONAL FUNDS
Excess Liquidation Proceeds	$0.00
Subsequent Recoveries	$0.00
Prepayment Penalties	$26,921.02
Other	$0.00

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Collateral Report Pool 2932
LOAN COUNT
Original Loan Count	1310
Beginning Loan Count	1310
Loans Added	0
Loans Prepaid-in-full	4
Loans Liquidated-in-full	0
Loans Repurchased	0
Ending Loan Count	1306
PRINCIPAL BALANCE
Original Scheduled Principal Balance	$348,078,673.35
Beginning Scheduled Principal Balance	$348,078,673.35
Scheduled Principal Received or Advanced	($900,110.67)
Unscheduled Principal	$70,390.23
Prepayments-in-full	$1,035,038.44

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Collateral Report Pool 2932 (Continued)
PRINCIPAL BALANCE
Liquidations-in-full	$0.00
Repurchases	$0.00
Principal Losses	$0.00
Ending Scheduled Principal Balance	$347,873,355.35
INTEREST
Accrued Interest at Gross Rate	$2,072,370.84
Unscheduled Interest	$0.00
Uncollected Interest	($820.93)
Relief Act Shortfall	$0.00
Prepayment Interest Shortfall	$0.00
Other Interest Shortfall	$0.00

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Collateral Report Pool 2932 (Continued)
FEES
Servicing Fees	$495,639.94
Other Fees	$0.00
ADDITIONAL FUNDS
Excess Liquidation Proceeds	$0.00
Subsequent Recoveries	$0.00
Prepayment Penalties	$0.00
Other	$0.00

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Collateral Report Pool 2933
LOAN COUNT
Original Loan Count	324
Beginning Loan Count	324
Loans Added	0
Loans Prepaid-in-full	7
Loans Liquidated-in-full	0
Loans Repurchased	0
Ending Loan Count	317
PRINCIPAL BALANCE
Original Scheduled Principal Balance	$200,887,363.85
Beginning Scheduled Principal Balance	$200,887,363.85
Scheduled Principal Received or Advanced	($479,042.05)
Unscheduled Principal	$36,207.57
Prepayments-in-full	$4,334,112.08

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Collateral Report Pool 2933 (Continued)
PRINCIPAL BALANCE
Liquidations-in-full	$0.00
Repurchases	$0.00
Principal Losses	$0.00
Ending Scheduled Principal Balance	$196,996,086.25
INTEREST
Accrued Interest at Gross Rate	$1,131,604.28
Unscheduled Interest	$0.00
Uncollected Interest	($1,647.06)
Relief Act Shortfall	$0.00
Prepayment Interest Shortfall	$0.00
Other Interest Shortfall	$0.00

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Collateral Report Pool 2933 (Continued)
FEES
Servicing Fees	$229,187.69
Other Fees	$0.00
ADDITIONAL FUNDS
Excess Liquidation Proceeds	$0.00
Subsequent Recoveries	$0.00
Prepayment Penalties	$0.00
Other	$0.00

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Collateral Report Pool 2934
LOAN COUNT
Original Loan Count	397
Beginning Loan Count	397
Loans Added	0
Loans Prepaid-in-full	1
Loans Liquidated-in-full	0
Loans Repurchased	0
Ending Loan Count	396
PRINCIPAL BALANCE
Original Scheduled Principal Balance	$232,939,728.99
Beginning Scheduled Principal Balance	$232,939,728.99
Scheduled Principal Received or Advanced	($566,089.09)
Unscheduled Principal	$38,290.95
Prepayments-in-full	$584,179.26

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Collateral Report Pool 2934 (Continued)
PRINCIPAL BALANCE
Liquidations-in-full	$0.00
Repurchases	$0.00
Principal Losses	$0.00
Ending Scheduled Principal Balance	$232,883,347.87
INTEREST
Accrued Interest at Gross Rate	$1,320,030.55
Unscheduled Interest	$0.00
Uncollected Interest	$0.00
Relief Act Shortfall	$0.00
Prepayment Interest Shortfall	$0.00
Other Interest Shortfall	$0.00

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Collateral Report Pool 2934 (Continued)
FEES
Servicing Fees	$281,801.98
Other Fees	$0.00
ADDITIONAL FUNDS
Excess Liquidation Proceeds	$0.00
Subsequent Recoveries	$0.00
Prepayment Penalties	$0.00
Other	$0.00

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Collateral Report Group 1
LOAN COUNT
Original Loan Count	2794
Beginning Loan Count	2794
Loans Added	0
Loans Prepaid-in-full	16
Loans Liquidated-in-full	0
Loans Repurchased	0
Ending Loan Count	2778
PRINCIPAL BALANCE
Original Scheduled Principal Balance	$983,553,610.29
Beginning Scheduled Principal Balance	$983,553,610.29
Scheduled Principal Received or Advanced	($2,467,766.91)
Unscheduled Principal	$193,620.79
Prepayments-in-full	$7,374,180.39

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Collateral Report Group 1 (Continued)
PRINCIPAL BALANCE
Liquidations-in-full	$0.00
Repurchases	$0.00
Principal Losses	$0.00
Ending Scheduled Principal Balance	$978,453,576.02
INTEREST
Accrued Interest at Gross Rate	$5,719,750.86
Unscheduled Interest	$0.00
Uncollected Interest	($3,136.64)
Relief Act Shortfall	$0.00
Prepayment Interest Shortfall	$0.00
Other Interest Shortfall	$0.00

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Collateral Report Group 1 (Continued)
FEES
Servicing Fees	$1,284,252.27
Other Fees	$0.00
ADDITIONAL FUNDS
Excess Liquidation Proceeds	$0.00
Subsequent Recoveries	$0.00
Prepayment Penalties	$43,356.70
Other	$0.00

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Collateral Report Total
LOAN COUNT
Original Loan Count	2794
Beginning Loan Count	2794
Loans Added	0
Loans Prepaid-in-full	16
Loans Liquidated-in-full	0
Loans Repurchased	0
Ending Loan Count	2778
PRINCIPAL BALANCE
Original Scheduled Principal Balance	$983,553,610.29
Beginning Scheduled Principal Balance	$983,553,610.29
Scheduled Principal Received or Advanced	($2,467,766.91)
Unscheduled Principal	$193,620.79
Prepayments-in-full	$7,374,180.39

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Collateral Report Total (Continued)
PRINCIPAL BALANCE
Liquidations-in-full	$0.00
Repurchases	$0.00
Principal Losses	$0.00
Ending Scheduled Principal Balance	$978,453,576.02
INTEREST
Accrued Interest at Gross Rate	$5,719,750.86
Unscheduled Interest	$0.00
Uncollected Interest	($3,136.64)
Relief Act Shortfall	$0.00
Prepayment Interest Shortfall	$0.00
Other Interest Shortfall	$0.00

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Collateral Report Total (Continued)
FEES
Servicing Fees	$1,284,252.27
Other Fees	$0.00
ADDITIONAL FUNDS
Excess Liquidation Proceeds	$0.00
Subsequent Recoveries	$0.00
Prepayment Penalties	$43,356.70
Other	$0.00

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Delinquency Information by Group*
Group ID	1 Month Count	Scheduled Ending Balance	2 Months Count	Scheduled Ending Balance	3 Months Count	Scheduled Ending Balance	4+ Months Count	Scheduled Ending Balance
Pool 2930	17	$4,146,171.22	0	$0.00	0	$0.00	0	$0.00
Pool 2931	38	$10,679,484.27	2	$686,130.05	0	$0.00	0	$0.00
Pool 2932	119	$30,927,847.55	2	$451,737.85	0	$0.00	0	$0.00
Pool 2933	4	$2,261,437.98	0	$0.00	0	$0.00	0	$0.00
Pool 2934	21	$10,902,367.72	0	$0.00	0	$0.00	0	$0.00
Group 1	199	$58,917,308.74	4	$1,137,867.90	0	$0.00	0	$0.00
Aggregate	199	$58,917,308.74	4	$1,137,867.90	0	$0.00	0	$0.00

* Does not include mortgage loans in foreclosure or REO.

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Foreclosure, REO, and Bankruptcy by Group**
Group ID	Foreclosure Count	Scheduled Ending Balance	REO Count	Scheduled Ending Balance	Bankruptcy Count	Scheduled Ending Balance
Pool 2930	0	$0.00	0	$0.00	0	$0.00
Pool 2931	0	$0.00	0	$0.00	0	$0.00
Pool 2932	0	$0.00	0	$0.00	0	$0.00
Pool 2933	0	$0.00	0	$0.00	0	$0.00
Pool 2934	0	$0.00	0	$0.00	0	$0.00
Group 1	0	$0.00	0	$0.00	0	$0.00
Aggregate	0	$0.00	0	$0.00	0	$0.00

** Loans in Bankruptcy will also be reflected under their applicable delinquency or foreclosure status.

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Aggregate Loss Amount by Group
Group ID	Count	Loss Amount
Pool 2930	0	$0.00
Pool 2931	0	$0.00
Pool 2932	0	$0.00
Pool 2933	0	$0.00
Pool 2934	0	$0.00
Group 1	0	$0.00
Aggregate	0	$0.00

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Servicer Advances by Group
Group	Count	Total
Pool 2930	17	$7,550.74
Pool 2931	40	$21,047.81
Pool 2932	121	$56,136.97
Pool 2933	4	$4,046.89
Pool 2934	21	$19,453.05
Group 1	203	$108,235.46
Aggregate	203	$108,235.46

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Stop Advances Loans
Group	Count	Loan Balance	Total Scheduled P&I
Pool 2930	0	$0.00	$0.00
Pool 2931	0	$0.00	$0.00
Pool 2932	0	$0.00	$0.00
Pool 2933	0	$0.00	$0.00
Pool 2934	0	$0.00	$0.00
Group 1	0	$0.00	$0.00
Aggregate	0	$0.00	$0.00

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Delinquency Roll Rates-Aggregate***
Current Value	Current		1 Month		2 Months		3 Months
Prior Value	Count	Balance	Count	Balance	Count	Balance	Count	Balance
Current	2575	$918,398,399.38	199	$58,917,308.74	4	$1,137,867.90	0	$0.00
Delq 1 Month	0	$0.00	0	$0.00	0	$0.00	0	$0.00
Delq 2 Month	0	$0.00	0	$0.00	0	$0.00	0	$0.00
Delq 3 Month	0	$0.00	0	$0.00	0	$0.00	0	$0.00
Delq 4 Month	0	$0.00	0	$0.00	0	$0.00	0	$0.00
Foreclosure	0	$0.00	0	$0.00	0	$0.00	0	$0.00

Current Value	4+ Months		Foreclosure		REO
Prior Value	Count	Balance	Count	Balance	Count	Balance
Current	0	$0.00	0	$0.00	0	$0.00
Delq 1 Month	0	$0.00	0	$0.00	0	$0.00
Delq 2 Month	0	$0.00	0	$0.00	0	$0.00
Delq 3 Month	0	$0.00	0	$0.00	0	$0.00
Delq 4 Month	0	$0.00	0	$0.00	0	$0.00
Foreclosure	0	$0.00	0	$0.00	0	$0.00

*** To use this chart, locate along the Current Value row the desired delinquency status as of the immediately preceding due date (e.g. Current, 1 Month delinquent, etc.). Use the left hand column labeled Prior Value to see the prior month's value. Follow the selected Current Value column to the desired Prior Value row.

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Credit Enhancement
Type	Original Balance	Beginning Balance	Reduction	Increase	Ending Balance
Class PPP Reserve Funds	$200.00	$200.00	$0.00	$0.00	$200.00
Interest Coverage Account	$5,988.55	$5,988.55	$5,988.55	$0.00	$0.00
Over Collateralization	$0.00	$0.00	$0.00	$0.00	$0.00
Other	$0.00	$0.00	$0.00	$0.00	$0.00

Insurance
Insurance Type	Original Balance	Claims Paid	Coverage Remaining
Pool Insurance	$0.00	$0.00	$0.00
Other	$0.00	$0.00	$0.00

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Subordinate Class Certificate Balances
The Class Principal Balances of each Class of the Class B1,B2,B3,B4,B5,B6,B7,B8,B9,B10,B11,B12,B13,B14 Certificates immediately after the principal and interest distribution on 06/26/2006 are as follows:
Class	Ending Principal Balance	Percentage of Aggregate Certificate Principal Balance on Closing Date	Percentage of Aggregate Certificate Ending Principal Balance
B1	$23,111,917.08	2.35%	2.36%
B2	$14,751,032.35	1.50%	1.51%
B3	$6,883,081.86	0.70%	0.70%
B4	$6,883,081.86	0.70%	0.70%
B5	$5,900,212.97	0.60%	0.60%
B6	$3,933,475.31	0.40%	0.40%
B7	$3,933,475.31	0.40%	0.40%
B8	$2,949,606.55	0.30%	0.30%
B9	$3,933,475.31	0.40%	0.40%
B10	$3,933,475.31	0.40%	0.40%
B11	$3,441,540.93	0.35%	0.35%
B12	$1,966,737.66	0.20%	0.20%

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Subordinate Class Certificate Balances
The Class Principal Balances of each Class of the Class B1,B2,B3,B4,B5,B6,B7,B8,B9,B10,B11,B12,B13,B14 Certificates immediately after the principal and interest distribution on 06/26/2006 are as follows:
Class	Ending Principal Balance	Percentage of Aggregate Certificate Principal Balance on Closing Date	Percentage of Aggregate Certificate Ending Principal Balance
B13	$7,375,016.24	0.75%	0.75%
B14	$6,889,590.99	0.70%	0.70%
Total	$95,885,719.73	9.75%	9.80%

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Glossary of Terms
TERM	DEFINITION
Average Ending Scheduled Principal Balance	Average scheduled principal balance of all mortgage loans as of the immediately preceding due date.
Compensating Interest	Interest paid by the servicer or master servicer in respect of Prepayment Interest Shortfall, subject to specified caps.
CPR (Constant Prepayment Rate)	The annualized, compounded single month mortality rate.
Current Interest Accrued	The interest accrued for the current month's distribution.
Deferred Interest	When a scheduled monthly payment is less than required to satisfy the note rate, the unpaid interest is deferred by adding it to the loan balance and the certificate balances.
Excess Liquidation Proceeds	Funds received at the time of liquidation in excess of the amount needed to satisfy the outstanding scheduled principal balance and related expenses.
Interest Rate Accrued	The rate at which interest is accrued for the current month's distribution.
Interest Rate Paid	The rate at which interest is paid for the current month's distribution.
Uncollected Interest	Interest not collected on delinquent loans for which scheduled payments are no longer being advanced, interest uncollected on prepayments and interest uncollected on liquidations.
Other Interest Shortfall	Any interest shortfall other than Uncompensated Interest Shortfall, Deferred Interest or Interest Uncollected on Non-Earning Assets.
Over Collateralization	Any excess of the aggregate principal balance of the mortgage loans over the aggregate principal balance of the certificates.
Prefunding Amount	The amount of cash being held for future loan purchases.

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Glossary of Terms (Continued)
TERM	DEFINITION
Prepayment Interest Shortfall	Any shortfall in collections of interest on mortgage loans resulting from prepayments in full or partial prepayments.
Principal Loss	The amount of principal reduction due to a loss realized on the mortgage loans.
Principal Reimbursed	The amount of principal passed through as a reimbursement.
PSA (Prepayment Speed Assumption)	A prepayment model that in its base case (stated as 100% PSA), assumes that prepayments start in month one at an annual CPR of 0.2%, rising linearly to 6.0% CPR in month 30, and then remain flat at 6.0% CPR thereafter.
Relief Act Shortfall	Interest shortfall resulting from application of the Servicemembers Civil Relief Act.
REO (Real Estate Owned)	Property acquired by the trust through foreclosure or deed-in-lieu of foreclosure on a defaulted loan.
Reserve Account	Funded or non-funded accounts set up at either the property or portfolio level in in anticipation of periodic or non-periodic capital expenditures or cash needs.
Servicer Advances	Scheduled principal and interest advances made by the servicer or master servicer for delinquent mortgage loans.
Servicing Fees	The monthly fee paid to the servicer to perform primary servicing function for the master servicer with respect to the mortgage loans and if applicable the fee charged by the master servicer for supervising the mortgage loan servicing.
SMM (Single Month Mortality)	In any given month, the SMM measures the percentage of the beginning pool balance that was paid back earlier than scheduled through payoffs.
Stop Advance	The amount of principal and interest on delinquent mortgage loans for which scheduled payments are no longer being advanced.
Subsequent Recoveries	The amount of funds recovered on mortgage loans that were previously liquidated at a loss.
Trigger Event	An event that may require a change in payment priority.

Series: WMALT 2006-AR4	Washington Mutual
Issue Date: 05/30/2006
Record Date: 05/31/2006
Distribution Date: 06/26/2006

Glossary of Terms (Continued)
TERM	DEFINITION
Unscheduled Interest	Interested collected in addition to the scheduled interest payment.
Unscheduled Principal	Payments of principal which were received with respect to any mortgage loan during the prior period, other than monthly scheduled principal, prepayments in full, repurchases, liquidation principal and subsequent recoveries.
Weighted Average Loan Age	For any distribution date, the weighted average of the loan age on the mortgage loans as of the immediately preceding due date.
Weighted Average Mortgage Interest Rate	For any distribution date, the weighted average of the mortgage interest rates on the mortgage loans as of the second preceding due date (after giving effect to the payments due on the mortgage loans on that due date).
Weighted Average Pass Through Rate	For any distribution date, the weighted average of the pass-through rates on the mortgage loans as of the second preceding due date (after giving effect to the payments due on the mortgage loans on that due date).
Weighted Average Remaining Term	For any distribution date, the weighted average of the maturity on the mortgage loans as of the immediately preceding due date.
MBA Delinquency Calculation	In this calculation, a loan increases its delinquency status if a monthly payment is not received by the end of the day immediately preceding the loan's next due date.
OTS Delinquency Calculation	In this calculation, a loan increases its delinquency status if a monthly payment is not received by the loan's due date in the following month.

Washington Mutual Mortgage Pass-Through Certificates, WMALT Series 2006-AR4 10-D/A