8-K 1 mal04003_jul.txt JULY 8K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington D. C. 20549 Form 8-K Current Report Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 26, 2004 MASTR ALTERNATIVE LOAN TRUST Mortgage Pass-Through Certificates, Series 2004-3 Trust (Exact name of registrant as specified in its charter) New York (governing law of 333-106982-21 Pooling and Servicing Agreement) (Commission 54-2147375 (State or other File Number) 54-2147376 jurisdiction IRS EIN of Incorporation) c/o Wells Fargo Bank, N.A. 9062 Old Annapolis Road Columbia, MD 21045 (Address of principal executive offices) (Zip Code) Registrant's telephone number, including area code: (410) 884-2000 (Former name or former address, if changed since last report) ITEM 5. Other Events On July 26, 2004 a distribution was made to holders of MASTR ALTERNATIVE LOAN TRUST, Mortgage Pass-Through Certificates, Series 2004-3 Trust. ITEM 7. Financial Statements and Exhibits (c) Exhibits furnished in accordance with Item 601(a) of Regulation S-K Exhibit Number Description EX-99.1 Monthly report distributed to holders of Mortgage Pass-Through Certificates, Series 2004-3 Trust, relating to the July 26, 2004 distribution. Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. MASTR ALTERNATIVE LOAN TRUST Mortgage Pass-Through Certificates, Series 2004-3 Trust By: Wells Fargo Bank, N.A. as Master Servicer By: /s/ Beth Belfield as Assistant Vice President By: Beth Belfield as Assistant Vice President Date: 7/29/04 INDEX TO EXHIBITS Exhibit Number Description EX-99.1 Monthly report distributed to holders of Mortgage Pass-Through Certificates, Series 2004-3 Trust, relating to the July 26, 2004 distribution. EX-99.1

~~SECURITIES~~MASTR ~~AND~~Alternative ~~EXCHANGE~~Loan ~~COMMISSION~~Trust Mortgage Pass-Through Certificates Record Date: 6/30/04 Distribution Date: 7/26/04 MAL Series: 2004-3 Contact: Customer Service - CTSLink Wells Fargo Bank, N.A. Securities Administration Services 7485 New Horizon Way Frederick, MD 21703 Telephone: (301) 815-6600 Fax: (301) 815-6660 Certificateholder Distribution Summary Certificate Certificate Beginning Class Pass-Through Certificate Interest Principal Class CUSIP Description Rate Balance Distribution Distribution 1-A1 576434NU4 SEN 5.00000% 48,544,162.55 202,241.30 685,211.78 2-A1 576434NV2 SEN 6.25000% 63,406,700.20 330,200.71 1,461,072.09 3-A1 576434NW0 SEN 6.00000% 37,935,392.96 189,652.54 44,598.70 4-A1 576434NX8 SEN 5.50000% 40,533,819.23 185,756.08 166,675.53 5-A1 576434NY6 SEN 6.50000% 48,504,360.12 262,698.12 2,372,490.96 6-A1 576434NZ3 SEN 6.50000% 45,234,482.17 244,988.56 1,976,835.45 7-A1 576434PA6 SEN 5.75000% 55,057,901.79 263,785.14 1,177,222.95 8-A1 576434PB4 SEN 7.00000% 68,537,074.33 399,748.12 3,304,642.16 15-PO 576434PC2 PO 0.00000% 4,044,955.56 0.00 81,568.75 30-PO 576434PD0 PO 0.00000% 3,237,675.15 0.00 37,460.28 15-AX 576434PE8 IO 6.00000% 0.00 31,067.97 0.00 30-AX-1 576434PF5 IO 6.00000% 0.00 13,007.14 0.00 30-AX-2 576434PG3 IO 6.50000% 0.00 53,222.39 0.00 B-1 576434PK4 SUB 6.48518% 8,339,050.30 45,061.07 11,507.30 B-2 576434PL2 SUB 6.48518% 3,632,212.64 19,627.10 5,012.20 B-3 576434PM0 SUB 6.48518% 1,883,332.63 10,176.82 2,598.87 B-4 576434PR9 SUB 6.48518% 1,478,978.82 7,991.84 2,040.89 B-5 576434PS7 SUB 6.48518% 1,076,616.91 5,817.63 1,485.66 B-6 576434PT5 SUB 6.48518% 807,322.25 4,362.46 1,114.05 B-I-1 576434PN8 SUB 5.73519% 6,144,381.37 29,362.23 10,331.92 B-I-2 576434PP3 SUB 5.73519% 2,156,254.97 10,304.12 3,625.79 B-I-3 576434PQ1 SUB 5.73519% 1,402,013.50 6,699.82 2,357.52 B-I-4 576434PU2 SUB 5.73519% 970,165.48 4,636.14 1,631.36 B-I-5 576434PV0 SUB 5.73519% 1,186,089.49 5,667.98 1,994.44 B-I-6 576434PW8 SUB 5.73519% 755,008.65 3,607.97 1,269.56 A-LR 576434PH1 SEN 7.00000% 0.00 0.00 0.00 A-UR 576434PJ7 SEN 7.00000% 0.00 0.00 0.00 Totals 444,867,951.07 2,329,683.25 11,352,748.21

~~Washington~~Certificateholder Distribution Summary (continued) Current Ending Cumulative Realized Certificate Total Realized Class Loss Balance Distribution Losses 1-A1 0.00 47,858,950.77 D887,453.C08 0. ~~20549~~00 2-A1 0.00 61,945,628.11 1,791,272.80 0.00 3-A1 0.00 37,890,794.26 234,251.24 0.00 4-A1 0.00 40,367,143.70 352,431.61 0.00 5-A1 0.00 46,131,869.16 2,635,189.08 0.00 6-A1 0.00 43,257,646.73 2,221,824.01 0.00 7-A1 0.00 53,880,678.84 1,441,008.09 0.00 8-A1 0.00 65,232,432.17 3,704,390.28 0.00 15-PO 0.00 3,963,386.81 81,568.75 0.00 30-PO 0.00 3,200,214.87 37,460.28 0.00 15-AX 0.00 0.00 31,067.97 0.00 30-AX-1 0.00 0.00 13,007.14 0.00 30-AX-2 0.00 0.00 53,222.39 0.00 B-1 0.00 8,327,543.00 56,568.37 0.00 B-2 0.00 3,627,200.44 24,639.30 0.00 B-3 0.00 1,880,733.76 12,775.69 0.00 B-4 0.00 1,476,937.94 10,032.73 0.00 B-5 0.00 1,075,131.25 7,303.29 0.00 B-6 0.00 806,208.21 5,476.51 0.00 B-I-1 0.00 6,134,049.45 39,694.15 0.00 B-I-2 0.00 2,152,629.18 13,929.91 0.00 B-I-3 0.00 1,399,655.98 9,057.34 0.00 B-I-4 0.00 968,534.12 6,267.50 0.00 B-I-5 0.00 1,184,095.05 7,662.42 0.00 B-I-6 0.00 753,739.08 4,877.53 0.00 A-LR 0.00 0.00 0.00 0.00 A-UR 0.00 0.00 0.00 0.00 Totals 0.00 433,515,202.88 13,682,431.46 0.00 All distributions required by the Pooling and Servicing Agreement have been calculated by the Certificate Administrator on behalf of the Trustee.

~~Form~~Principal Distribution Statement Original Beginning Scheduled Unscheduled Face Certificate Principal Principal Realized Class Amount Balance Distribution Distribution Accretion Loss (1) 1-A1 50,048,000.00 48,544,162.55 184,567.32 500,644.46 0.00 0.00 2-A1 69,905,000.00 63,406,700.20 58,674.48 1,402,397.61 0.00 0.00 3-A1 39,948,000.00 37,935,392.96 37,913.14 6,685.56 0.00 0.00 4-A1 42,130,000.00 40,533,819.23 43,611.41 123,064.12 0.00 0.00 5-A1 54,599,000.00 48,504,360.12 38,116.42 2,334,374.54 0.00 0.00 6-A1 49,511,000.00 45,234,482.17 38,594.67 1,938,240.78 0.00 0.00 7-A1 58,856,000.00 55,057,901.79 176,200.23 1,001,022.72 0.00 0.00 8-KA1 84,127,000.00 68,537,074.33 51,364.27 3,253,277.89 0.00 0.00 15-PO 4,219,397.99 4,044,955.56 16,109.69 65,459.06 0.00 0.00 30-PO 3,509,283.23 3,237,675.15 3,082.46 34,377.82 0.00 0.00 15-AX 0.00 0.00 0.00 0.00 0.00 0.00 30-AX-1 0.00 0.00 0.00 0.00 0.00 0.00 30-AX-2 0.00 0.00 0.00 0.00 0.00 0.00 B-1 8,373,000.00 8,339,050.30 11,507.30 0.00 0.00 0.00 B-2 3,647,000.00 3,632,212.64 5,012.20 0.00 0.00 0.00 B-3 1,891,000.00 1,883,332.63 2,598.87 0.00 0.00 0.00 B-4 1,485,000.00 1,478,978.82 2,040.89 0.00 0.00 0.00 B-5 1,081,000.00 1,076,616.91 1,485.66 0.00 0.00 0.00 B-6 810,609.00 807,322.25 1,114.05 0.00 0.00 0.00 B-I-1 6,175,000.00 6,144,381.37 10,331.92 0.00 0.00 0.00 B-I-2 2,167,000.00 2,156,254.97 3,625.79 0.00 0.00 0.00 B-I-3 1,409,000.00 1,402,013.50 2,357.52 0.00 0.00 0.00 B-I-4 975,000.00 970,165.48 1,631.36 0.00 0.00 0.00 B-I-5 1,192,000.00 1,186,089.49 1,994.44 0.00 0.00 0.00 B-I-6 758,771.00 755,008.65 1,269.56 0.00 0.00 0.00 A-LR 50.00 0.00 0.00 0.00 0.00 0.00 A-UR 50.00 0.00 0.00 0.00 0.00 0.00 Totals 486,817,161.22 444,867,951.07 693,203.65 10,659,544.56 0.00 0.00 (1) Amount Does Not Include Excess Special Hazard, Bankruptcy, or Fraud Losses Unless Otherwise Disclosed. Please Refer to the Prospectus Supplement for a Full Description.

~~CURRENT~~Principal ~~REPORT~~Distribution Statement (continued) Total Ending Ending Total Principal Certificate Certificate Principal Class Reduction Balance Percentage Distribution 1-A1 685,211.78 47,858,950.77 0.95626100 685,211.78 2-A1 1,461,072.09 61,945,628.11 0.88614016 1,461,072.09 3-A1 44,598.70 37,890,794.26 0.94850291 44,598.70 4-A1 166,675.53 40,367,143.70 0.95815675 166,675.53 5-A1 2,372,490.96 46,131,869.16 0.84492150 2,372,490.96 6-A1 1,976,835.45 43,257,646.73 0.87369770 1,976,835.45 7-A1 1,177,222.95 53,880,678.84 0.91546620 1,177,222.95 8-A1 3,304,642.16 65,232,432.17 0.77540424 3,304,642.16 15-PO 81,568.75 3,963,386.81 0.93932519 81,568.75 30-PO 37,460.28 3,200,214.87 0.91192835 37,460.28 15-AX 0.00 0.00 0.00000000 0.00 30-AX-1 0.00 0.00 0.00000000 0.00 30-AX-2 0.00 0.00 0.00000000 0.00 B-1 11,507.30 8,327,543.00 0.99457100 11,507.30 B-2 5,012.20 3,627,200.44 0.99457100 5,012.20 B-3 2,598.87 1,880,733.76 0.99457100 2,598.87 B-4 2,040.89 1,476,937.94 0.99457100 2,040.89 B-5 1,485.66 1,075,131.25 0.99457100 1,485.66 B-6 1,114.05 806,208.21 0.99457101 1,114.05 B-I-1 10,331.92 6,134,049.45 0.99336833 10,331.92 B-I-2 3,625.79 2,152,629.18 0.99336833 3,625.79 B-I-3 2,357.52 1,399,655.98 0.99336833 2,357.52 B-I-4 1,631.36 968,534.12 0.99336833 1,631.36 B-I-5 1,994.44 1,184,095.05 0.99336833 1,994.44 B-I-6 1,269.56 753,739.08 0.99336833 1,269.56 A-LR 0.00 0.00 0.00000000 0.00 A-UR 0.00 0.00 0.00000000 0.00 Totals 11,352,748.21 433,515,202.88 0.89050929 11,352,748.21

~~Pursuant~~Principal toDistribution ~~Section~~Factors 13Statement orOriginal Beginning Scheduled Unscheduled Face Certificate Principal Principal Class (2) Amount Balance Distribution Distribution Accretion 1-A1 50,048,000.00 969.95209699 3.68780611 10.00328605 0.00000000 2-A1 69,905,000.00 907.04098705 0.83934597 20.06147786 0.00000000 3-A1 39,948,000.00 949.61932913 0.94906228 0.16735656 0.00000000 4-A1 42,130,000.00 962.11296535 1.03516283 2.92105673 0.00000000 5-A1 54,599,000.00 888.37451455 0.69811572 42.75489551 0.00000000 6-A1 49,511,000.00 913.62489487 0.77951708 39.14767991 0.00000000 7-A1 58,856,000.00 935.46795212 2.99375136 17.00799783 0.00000000 8-A1 84,127,000.00 814.68582417 0.61055630 38.67103177 0.00000000 15-PO 4,219,397.99 958.65703344 3.81800675 15.51383874 0.00000000 30-PO 3,509,283.23 922.60297554 0.87837310 9.79625118 0.00000000 15-AX 0.00 0.00000000 0.00000000 0.00000000 0.00000000 30-AX-1 0.00 0.00000000 0.00000000 0.00000000 0.00000000 30-AX-2 0.00 0.00000000 0.00000000 0.00000000 0.00000000 B-1 8,373,000.00 995.94533620 1.37433417 0.00000000 0.00000000 B-2 3,647,000.00 995.94533589 1.37433507 0.00000000 0.00000000 B-3 1,891,000.00 995.94533580 1.37433633 0.00000000 0.00000000 B-4 1,485,000.00 995.94533333 1.37433670 0.00000000 0.00000000 B-5 1,081,000.00 995.94533765 1.37433858 0.00000000 0.00000000 B-6 810,609.00 995.94533246 1.37433707 0.00000000 0.00000000 B-I-1 6,175,000.00 995.04151741 1.67318543 0.00000000 0.00000000 B-I-2 2,167,000.00 995.04151823 1.67318413 0.00000000 0.00000000 B-I-3 1,409,000.00 995.04151881 1.67318666 0.00000000 0.00000000 B-I-4 975,000.00 995.04151795 1.67318974 0.00000000 0.00000000 B-I-5 1,192,000.00 995.04151846 1.67318792 0.00000000 0.00000000 B-I-6 758,771.00 995.04152109 1.67317939 0.00000000 0.00000000 A-LR 50.00 0.00000000 0.00000000 0.00000000 0.00000000 A-UR 50.00 0.00000000 0.00000000 0.00000000 0.00000000 (d2) ofAll ~~the~~Classes are per $1,000 denomination.

~~Securities~~Principal ~~Exchange~~Distribution ~~Act~~Factors ofStatement ~~1934~~(continued) Total Ending Ending Total Realized Principal Certificate Certificate Principal Class Loss (3) Reduction Balance Percentage Distribution 1-A1 0.00000000 13.69109215 956.26100484 0.95626100 13.69109215 2-A1 0.00000000 20.90082383 886.14016322 0.88614016 20.90082383 3-A1 0.00000000 1.11641884 948.50291028 0.94850291 1.11641884 4-A1 0.00000000 3.95621956 958.15674579 0.95815675 3.95621956 5-A1 0.00000000 43.45301123 844.92150332 0.84492150 43.45301123 6-A1 0.00000000 39.92719699 873.69769809 0.87369770 39.92719699 7-A1 0.00000000 20.00174918 915.46620294 0.91546620 20.00174918 8-A1 0.00000000 39.28158808 775.40423610 0.77540424 39.28158808 15-PO 0.00000000 19.33184549 939.32518795 0.93932519 19.33184549 30-PO 0.00000000 10.67462429 911.92835125 0.91192835 10.67462429 15-AX 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 30-AX-1 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 30-AX-2 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 B-1 0.00000000 1.37433417 994.57100203 0.99457100 1.37433417 B-2 0.00000000 1.37433507 994.57100082 0.99457100 1.37433507 B-3 0.00000000 1.37433633 994.57099947 0.99457100 1.37433633 B-4 0.00000000 1.37433670 994.57100337 0.99457100 1.37433670 B-5 0.00000000 1.37433858 994.57099907 0.99457100 1.37433858 B-6 0.00000000 1.37433707 994.57100772 0.99457101 1.37433707 B-I-1 0.00000000 1.67318543 993.36833198 0.99336833 1.67318543 B-I-2 0.00000000 1.67318413 993.36833410 0.99336833 1.67318413 B-I-3 0.00000000 1.67318666 993.36833215 0.99336833 1.67318666 B-I-4 0.00000000 1.67318974 993.36832821 0.99336833 1.67318974 B-I-5 0.00000000 1.67318792 993.36833054 0.99336833 1.67318792 B-I-6 0.00000000 1.67317939 993.36832852 0.99336833 1.67317939 A-LR 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 A-UR 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 (3) Amount Does Not Include Excess Special Hazard, Bankruptcy, or Fraud Losses Unless Otherwise Disclosed. Please Refer to the Prospectus Supplement for a Full Description.

~~Date~~Interest ofDistribution ~~Report~~Statement ~~(Date~~Beginning Payment of ~~earliest~~Original ~~event~~Current Certificate/ Current Unpaid Current Face Certificate Notional Accrued Interest Interest Class Amount Rate Balance Interest Shortfall Shortfall 1-A1 50,048,000.00 5.00000% 48,544,162.55 202,267.34 0.00 0.00 2-A1 69,905,000.00 6.25000% 63,406,700.20 330,243.23 0.00 0.00 3-A1 39,948,000.00 6.00000% 37,935,392.96 189,676.96 0.00 0.00 4-A1 42,130,000.00 5.50000% 40,533,819.23 185,780.00 0.00 0.00 5-A1 54,599,000.00 6.50000% 48,504,360.12 262,731.95 0.00 0.00 6-A1 49,511,000.00 6.50000% 45,234,482.17 245,020.11 0.00 0.00 7-A1 58,856,000.00 5.75000% 55,057,901.79 263,819.11 0.00 0.00 8-A1 84,127,000.00 7.00000% 68,537,074.33 399,799.60 0.00 0.00 15-PO 4,219,397.99 0.00000% 4,044,955.56 0.00 0.00 0.00 30-PO 3,509,283.23 0.00000% 3,237,675.15 0.00 0.00 0.00 15-AX 0.00 6.00000% 6,214,394.85 31,071.97 0.00 0.00 30-AX-1 0.00 6.00000% 2,601,762.06 13,008.81 0.00 0.00 30-AX-2 0.00 6.50000% 9,826,937.11 53,229.24 0.00 0.00 B-1 8,373,000.00 6.48518% 8,339,050.30 45,066.87 0.00 0.00 B-2 3,647,000.00 6.48518% 3,632,212.64 19,629.63 0.00 0.00 B-3 1,891,000.00 6.48518% 1,883,332.63 10,178.13 0.00 0.00 B-4 1,485,000.00 6.48518% 1,478,978.82 7,992.87 0.00 0.00 B-5 1,081,000.00 6.48518% 1,076,616.91 5,818.38 0.00 0.00 B-6 810,609.00 6.48518% 807,322.25 4,363.03 0.00 0.00 B-I-1 6,175,000.00 5.73519% 6,144,381.37 29,366.02 0.00 0.00 B-I-2 2,167,000.00 5.73519% 2,156,254.97 10,305.45 0.00 0.00 B-I-3 1,409,000.00 5.73519% 1,402,013.50 6,700.68 0.00 0.00 B-I-4 975,000.00 5.73519% 970,165.48 4,636.74 0.00 0.00 B-I-5 1,192,000.00 5.73519% 1,186,089.49 5,668.71 0.00 0.00 B-I-6 758,771.00 5.73519% 755,008.65 3,608.43 0.00 0.00 A-LR 50.00 7.00000% 0.00 0.00 0.00 0.00 A-UR 50.00 7.00000% 0.00 0.00 0.00 0.00 Totals 486,817,161.22 2,329,983.26 0.00 0.00

~~Reported~~Interest Distribution Statement (continued)~~: April~~ 22Remaining Ending Non-Supported Total Unpaid Certificate/ Interest Realized Interest Interest Notional Class Shortfall Losses (4) Distribution Shortfall Balance 1-A1 26.05 0.00 202,241.30 ~~2004 MORTGAGE~~0.00 ~~ASSET~~47,858,950.77 ~~SECURITIZATION~~2-A1 ~~TRANSACTIONS~~42.53 0.00 330,200.71 ~~INC~~0.00 ~~(as~~61,945,628.11 ~~depositor~~3-A1 ~~under~~24.42 ~~the~~0.00 ~~Pooling~~189,652.54 ~~and~~0.00 ~~Servicing~~37,890,794.26 ~~Agreement~~4-A1 23.92 0.00 185,756.08 ~~relating~~0.00 to40,367,143.70 ~~the~~5-A1 ~~MASTR~~33.83 ~~Alternative~~0.00 ~~Loan~~262,698.12 ~~Trust~~0.00 ~~2004~~46,131,869.16 6-A1 31.55 0.00 244,988.56 0.00 43,257,646.73 7-A1 33.97 0.00 263,785.14 0.00 53,880,678.84 8-A1 51.48 0.00 399,748.12 0.00 65,232,432.17 15-PO 0.00 0.00 0.00 0.00 3,963,386.81 ~~Mortgage~~30-PO ~~Pass~~0.00 0.00 0.00 0.00 3,200,214.87 15-~~Through~~AX ~~Certificates~~4.00 0.00 31,067.97 ~~Series~~0.00 ~~2004~~6,036,776.80 30-AX-1 1.68 0.00 13,007.14 0.00 2,582,787.72 30-AX-2 6.85 0.00 53,222.39 0.00 9,233,230.91 B-1 5.80 0.00 45,061.07 0.00 8,327,543.00 B-2 2.53 0.00 19,627.10 0.00 3,627,200.44 B-3 1.31 0.00 10,176.82 0.00 1,880,733.76 B-4 1.03 0.00 7,991.84 0.00 1,476,937.94 B-5 0.75 0.00 5,817.63 0.00 1,075,131.25 B-6 0.56 0.00 4,362.46 0.00 806,208.21 B-I-1 3.78 0.00 29,362.23 0.00 6,134,049.45 B-I-2 1.33 0.00 10,304.12 0.00 2,152,629.18 B-I-3 0.86 0.00 6,699.82 0.00 1,399,655.98 B-I-4 0.60 0.00 4,636.14 0.00 968,534.12 B-I-5 0.73 0.00 5,667.98 0.00 1,184,095.05 B-I-6 0.46 0.00 3,607.97 0.00 753,739.08 A-LR 0.00 0.00 0.00 0.00 0.00 A-UR 0.00 0.00 0.00 0.00 0.00 Totals 300.02 0.00 2,329,683.25 0.00 (4) Amount Does Not Include Excess Special Hazard, Bankruptcy, or Fraud Losses Unless Otherwise Disclosed. Please Refer to the Prospectus Supplement for a Full Description.

MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC.
(Exact name of registrant as specified in its charter)
Delaware	333-106982	06-1204982
(State or Other Jurisdiction of Incorporation)	(Commission File Number)	(I.R.S. Employer Identification No.)
1285 Avenue of the Americas New York, New York 10019
(Address of Principal Executive Offices) (Zip Code)
Registrant’s telephone number, including area code (212) 713-2000

~~Item~~Interest Distribution Factors Statement (continued) Remaining Ending Non-Supported Total Unpaid Certificate/ Interest Realized Interest Interest Notional Class Shortfall Losses (6) Distribution Shortfall Balance 1-A1 0.00052050 0.00000000 4.04094669 0.00000000 956.26100484 2-A1 0.00060840 0.00000000 4.72356355 0.00000000 886.14016322 3-A1 0.00061129 0.00000000 4.74748523 0.00000000 948.50291028 4-A1 0.00056777 0.00000000 4.40911654 0.00000000 958.15674579 5-A1 0.00061961 0.00000000 4.81140900 0.00000000 844.92150332 6-A1 0.00063723 0.00000000 4.94816425 0.00000000 873.69769809 7-A1 0.00057717 0.00000000 4.48187339 0.00000000 915.46620294 8-A1 0.00061193 0.00000000 4.75172204 0.00000000 775.40423610 15-PO 0.00000000 0.00000000 0.00000000 0.00000000 939.32518795 30-PO 0.00000000 0.00000000 0.00000000 0.00000000 911.92835125 15-AX 0.00060238 0.00000000 4.67868917 0.00000000 909.11000183 30-AX-1 0.00059620 0.00000000 4.61600247 0.00000000 916.58538947 30-AX-2 0.00057637 0.00000000 4.47825231 0.00000000 776.90493924 B-1 0.00069270 0.00000000 5.38171145 0.00000000 994.57100203 B-2 0.00069372 0.00000000 5.38171100 0.00000000 994.57100082 B-3 0.00069276 0.00000000 5.38171338 0.00000000 994.57099947 B-4 0.00069360 0.00000000 5.38171044 0.00000000 994.57100337 B-5 0.00069380 0.00000000 5.38171138 0.00000000 994.57099907 B-6 0.00069084 0.00000000 5.38170684 0.00000000 994.57100772 B-I-1 0.00061215 0.00000000 4.75501700 0.00000000 993.36833198 B-I-2 0.00061375 0.00000000 4.75501615 0.00000000 993.36833410 B-I-3 0.00061036 0.00000000 4.75501774 0.00000000 993.36833215 B-I-4 0.00061538 0.00000000 4.75501538 0.00000000 993.36832821 B-I-5 0.00061242 0.00000000 4.75501678 0.00000000 993.36833054 B-I-6 0.00060624 0.00000000 4.75501831 0.00000000 993.36832852 A-LR 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 A-UR 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 (6) Amount Does Not Include Excess Special Hazard, Bankruptcy,or Fraud Losses Unless Otherwise Disclosed. Please Refer to the Prospectus Supplement for a Full Description.

~~Other~~Certificateholder ~~Events~~Component Statement Component Beginning Ending Beginning Ending Ending Pass-Through Notional Notional Component Component Component Class Rate Balance Balance Balance Balance Percentage PO-1 0.00000% 0.00 0.00 617,526.29 605,522.25 96.61963227% PO-7 0.00000% 0.00 0.00 3,427,429.27 3,357,864.55 93.46377972% PO-2 0.00000% 0.00 0.00 486,998.28 476,176.02 90.21499741% PO-3 0.00000% 0.00 0.00 392,532.88 392,117.33 93.30683784% PO-4 0.00000% 0.00 0.00 398,316.44 397,739.45 95.67710820% PO-5 0.00000% 0.00 0.00 474,964.32 468,011.42 97.66834414% PO-6 0.00000% 0.00 0.00 265,339.96 249,237.15 91.32476953% PO-8 0.00000% 0.00 0.00 1,219,523.28 1,216,933.49 87.33509603% 15-AX-1 6.00000% 2,619,371.32 2,586,463.06 0.00 0.00 95.45831244% 15-AX-7 6.00000% 3,595,023.53 3,450,313.74 0.00 0.00 87.77650921% 30-AX-1-2 6.00000% 1,614,348.76 1,601,133.89 0.00 0.00 89.47811851% 30-AX-1-4 6.00000% 987,413.30 981,653.83 0.00 0.00 95.45238288% 30-AX-2-5 6.50000% 4,112,647.57 3,839,896.78 0.00 0.00 77.25399607% 30-AX-2-6 6.50000% 2,558,491.93 2,433,103.74 0.00 0.00 84.90577611% 30-AX-2-8 6.50000% 3,155,797.61 2,960,230.39 0.00 0.00 73.11920023%

~~Master~~CERTIFICATEHOLDER ~~Asset~~ACCOUNT ~~Securitization~~STATEMENT ~~Transactions,~~CERTIFICATE ~~Inc.~~ACCOUNT ~~(the~~Beginning ~~“Company”)~~Balance ~~entered~~0.00 ~~into~~Deposits aPayments ~~Pooling~~of Interest and ~~Servicing~~Principal ~~Agreement~~13,734,772.88 ~~dated~~Liquidations, asInsurance ~~of March 1~~Proceeds, ~~2004~~Reserve ~~(the~~Funds ~~“Agreement”)~~0.00 ~~among~~Proceeds ~~the~~from ~~Company,~~Repurchased inLoans ~~its~~0.00 ~~capacity~~Other asAmounts ~~depositor~~ (inServicer ~~such~~Advances) ~~capacity~~74,216.91 ~~the~~Realized ~~“Depositor”)~~Loss (Gains, ~~UBS~~Subsequent ~~Real~~Expenses ~~Estate~~& ~~Securities~~Recoveries) ~~Inc~~0.,00 asPrepayment ~~transferor~~Penalties ~~(in~~0.00 ~~such~~Total ~~capacity,~~Deposits ~~the “Transferor”)~~13, ~~Wells Fargo Bank~~808, N989.~~A.,~~79 asWithdrawals ~~master~~Reimbursement ~~servicer~~for ~~(in~~Servicer ~~such~~Advances ~~capacity,~~0.00 ~~the~~Payment ~~“Master~~of ~~Servicer”)~~Service ~~and~~Fee ~~custodian (in such capacity~~126,558.33 ~~the~~Payment ~~“Custodian”),~~of Interest and ~~Wachovia~~Principal ~~Bank~~13, ~~National Association~~682,431.46 asTotal ~~trustee~~Withdrawals (inPool ~~such~~Distribution ~~capacity, the “Trustee”~~Amount)~~. The~~ ~~Certificates were issued on March 30~~13, ~~2004~~808,989. ~~The~~79 ~~Pooling~~Ending ~~and~~Balance ~~Servicing Agreement is annexed hereto as Exhibit 99~~0.1.00

~~Item~~PREPAYMENT/CURTAILMENT 7INTEREST SHORTFALL Total Prepayment/Curtailment Interest Shortfall 300. ~~Financial~~02 ~~Statements,~~Servicing ~~Pro~~Fee ~~Forma~~Support ~~Financial~~0.00 ~~Information~~Non-Supported ~~and~~Prepayment/Curtailment ~~Exhibits~~Interest Shortfall 300.02

~~(a)~~SERVICING FEES Gross Servicing Fee 126,516.46 Master Servicing Fee 41.87 Supported Prepayment/Curtailment Interest Shortfall 0.00 Net Servicing Fee 126,558.33

~~Not~~LOAN ~~applicable~~STATUS STRATIFICATION/CREDIT ENHANCEMENT STATEMENT DELINQUENCY STATUS DELINQUENT BANKRUPTCY FORECLOSURE REO Total No of Loans No of Loans No of Loans No of Loans No of Loans Principal Balance Principal Balance Principal Balance Principal Balance Principal Balance 0-29 Days 0 0 0 0 0.00 0.00 0.00 0.00 30 Days 40 0 0 0 40 8,209,598.73 0.00 0.00 0.00 8,209,598.73 60 Days 7 0 0 0 7 1,518,281.09 0.00 0.00 0.00 1,518,281.09 90 Days 2 0 3 0 5 116,046.28 0.00 673,470.17 0.00 789,516.45 120 Days 0 0 2 0 2 0.00 0.00 699,299.23 0.00 699,299.23 150 Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 180+ Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 Totals 49 0 5 0 54 9,843,926.10 0.00 1,372,769.40 0.00 11,216,695.50 No of Loans No of Loans No of Loans No of Loans No of Loans Principal Balance Principal Balance Principal Balance Principal Balance Principal Balance 0-29 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 30 Days 1.479290% 0.000000% 0.000000% 0.000000% 1.479290% 1.891365% 0.000000% 0.000000% 0.000000% 1.891365% 60 Days 0.258876% 0.000000% 0.000000% 0.000000% 0.258876% 0.349789% 0.000000% 0.000000% 0.000000% 0.349789% 90 Days 0.073964% 0.000000% 0.110947% 0.000000% 0.184911% 0.026735% 0.000000% 0.155157% 0.000000% 0.181892% 120 Days 0.000000% 0.000000% 0.073964% 0.000000% 0.073964% 0.000000% 0.000000% 0.161108% 0.000000% 0.161108% 150 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 180+ Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% Totals 1.812130% 0.000000% 0.184911% 0.000000% 1.997041% 2.267888% 0.000000% 0.316265% 0.000000% 2.584153%

(b)

~~Not~~OTHER ~~applicable~~INFORMATION Current Period Class A Insufficient Funds 0.00 Principal Balance of Contaminated Properties 0.00 Periodic Advance 74,216.91

~~(c)~~CREDIT ENHANCEMENT Original $ Original % Current $ Current % Bankruptcy 150,000.00 0.03081239% 0.00 0.00000000% Fraud 8,103,567.00 1.66460175% 0.00 0.00000000% Special Hazard 2,794,496.00 0.57403400% 0.00 0.00000000% Limit of Subordinate's Exposure to Certain Types of Losses

~~Exhibits:~~COLLATERAL STATEMENT Collateral Description Fixed 15 & 30 Year Weighted Average Gross Coupon 6.626348% Weighted Average Pass-Through Rate 6.284966% Weighted Average Maturity(Stepdown Calculation ) 308 Beginning Scheduled Collateral Loan Count 2,753 Number Of Loans Paid In Full 49 Ending Scheduled Collateral Loan Count 2,704 Beginning Scheduled Collateral Balance 444,867,951.68 Ending Scheduled Collateral Balance 433,515,203.48 Ending Actual Collateral Balance at 30-Jun-2004 434,056,886.17 Monthly P &I Constant 3,149,745.32 Special Servicing Fee 0.00 Prepayment Penalties 0.00 Realized Loss Amount 0.00 Cumulative Realized Loss 0.00 Class A Non-PO Optimal Amount 13,246,368.88 Class AP Deferred Amount 0.00 Ending Scheduled Balance for Premium Loans 433,515,203.48 Scheduled Principal 693,203.63 Unscheduled Principal 10,659,544.57

99Bankruptcy Loss Coverage Amount: Group B L $150,000.00 Bankruptcy Loss Coverage Amount: Group B-I $150,000.00 Fraud Loss Coverage Amount: Group B Loan G $8,103,567.00 Fraud Loss Coverage Amount: Group B-1 Loan $6,500,948.00 Special Hazard Loss Coverage Amount: Group $2,794,496.00 Special Hazard Loss Coverage Amount: Group $2,166,983.00

~~The~~Group ~~Pooling~~Level ~~and~~Collateral ~~Servicing~~Statement ~~Agreement~~Group ~~dated~~1 as2 of3 ~~March~~Collateral 1Description Fixed 15 Year Fixed 30 Year Fixed 30 Year Weighted Average Coupon Rate 5.491581 6.599375 6.192312 Weighted Average Net Rate 5.241581 6.349376 5.942312 Weighted Average Maturity 174 355 354 Beginning Loan Count 436 564 272 Loans Paid In Full 3 12 0 Ending Loan Count 433 552 272 Beginning Scheduled Balance 52,275,020.94 68,257,807.64 40,828,523.75 Ending scheduled Balance 51,565,968.08 66,781,874.89 40,781,010.37 Record Date 06/30/2004 06/30/2004 06/30/2004 Principal And Interest Constant 438,117.34 by438,564.03 ~~and~~251,495.16 ~~among~~Scheduled ~~the~~Principal ~~Company~~198,890.25 ~~the~~63,181.62 ~~Transferor~~40,809.37 ~~the~~Unscheduled ~~Master~~Principal ~~Servicer~~510,162.61 ~~the~~1,412,751.13 ~~Custodian~~6,704.01 ~~and~~Scheduled ~~the~~Interest 239,227.09 375,382.41 210,685.79 Servicing Fees 10,890.63 14,220.36 8,505.94 Master Servicing Fees 0.00 0.00 0.00 Trustee Fee 0.00 0.00 0.00 FRY Amount 0.00 0.00 0.00 Special Hazard Fee 0.00 0.00 0.00 Other Fee 0.00 117.25 0.00 Pool Insurance Fee 0.00 0.00 0.00 Spread Fee 1 0.00 0.00 0.00 Spread Fee 2 0.00 0.00 0.00 Spread Fee 3 0.00 0.00 0.00 Net Interest 228,336.46 361,044.80 202,179.85 Realized Loss Amount 0.00 0.00 0.00 Cumulative Realized Loss 0.00 0.00 0.00 Percentage of Cumulative Losses 0.0000 0.0000 0.0000 Prepayment Penalties 0.00 0.00 0.00 Special Servicing Fee 0.00 0.00 0.00 Pass-Through Rate 5.241581 6.347314 5.942312

~~Pursuant~~Group toLevel ~~the~~Collateral ~~requirements~~Statement ofGroup ~~the~~4 ~~Securities~~5 ~~Exchange~~6 ~~Act~~Collateral ofDescription ~~1934~~Fixed 30 Year Fixed 30 Year Fixed 30 Year Weighted Average Coupon Rate 5.835701 7.462196 7.061941 Weighted Average Net Rate 5.585701 7.212195 6.811940 Weighted Average Maturity 354 355 353 Beginning Loan Count 290 216 183 Loans Paid In Full 1 7 8 Ending Loan Count 289 209 175 Beginning Scheduled Balance 43,568,010.06 ~~the~~52,737,019.08 ~~registrant~~48,895,675.57 ~~has~~Ending ~~duly~~scheduled ~~caused~~Balance ~~this~~43,397,921.53 ~~report~~50,354,622.29 to46,899,839.93 beRecord ~~signed~~Date on06/30/2004 ~~its~~06/30/2004 ~~behalf~~06/30/2004 byPrincipal ~~the~~And ~~undersigned~~Interest Constant 258,790.62 ~~thereunto~~369,470.53 ~~duly~~329,490.58 ~~authorized~~Scheduled Principal 46,915.71 41,525.57 41,741.93 Unscheduled Principal 123,172.82 2,340,871.22 1,954,093.71 Scheduled Interest 211,874.91 327,944.96 287,748.65 Servicing Fees 9,076.67 10,986.90 10,186.63 Master Servicing Fees 0.00 0.00 5.07 Trustee Fee 0.00 0.00 0.00 FRY Amount 0.00 0.00 0.00 Special Hazard Fee 0.00 0.00 0.00 Other Fee 0.00 11,595.14 284.11 Pool Insurance Fee 0.00 0.00 0.00 Spread Fee 1 0.00 0.00 0.00 Spread Fee 2 0.00 0.00 0.00 Spread Fee 3 0.00 0.00 0.00 Net Interest 202,798.24 305,362.92 277,272.84 Realized Loss Amount 0.00 0.00 0.00 Cumulative Realized Loss 0.00 0.00 0.00 Percentage of Cumulative Losses 0.0000 0.0000 0.0000 Prepayment Penalties 0.00 0.00 0.00 Special Servicing Fee 0.00 0.00 0.00 Pass-Through Rate 5.585701 6.948355 6.804844

~~MORTGAGE~~Group ~~ASSET~~Level ~~SECURITIZATION~~Collateral Statement Group 7 8 Total Collateral Description Fixed 15 Year Fixed 30 Year Fixed 15 & 30 Year Weighted Average Coupon Rate 6.035765 7.750676 6.626348 Weighted Average Net Rate 5.785766 7.500675 6.376348 Weighted Average Maturity 173.00 353.00 308.00 Record Date 06/30/2004 06/30/2004 06/30/2004 Principal And Interest Constant 518,804.69 545,012.37 3,149,745.32 Beginning Loan Count 430 362 2,753 Loans Paid In Full 6 12 49 Ending Loan Count 424 350 2,704 Beginning Scheduled Balance 62,715,044.92 75,590,849.72 444,867,951.68 Ending Scheduled Balance 61,454,721.02 72,279,245.37 433,515,203.48 Scheduled Principal 203,360.27 56,778.91 693,203.63 Unscheduled Principal 1,056,963.63 3,254,825.44 10,659,544.57 Scheduled Interest 315,444.42 488,233.46 2,456,541.69 Servicing Fee 13,065.63 15,748.10 92,680.86 Master Servicing Fee 36.80 0.00 41.87 Trustee Fee 0.00 0.00 0.00 Fry Amount 0.00 0.00 0.00 Special Hazard Fee 0.00 0.00 0.00 Other Fee 280.31 21,558.79 33,835.60 Pool Insurance Fee 0.00 0.00 0.00 Spread 1 0.00 0.00 0.00 Spread 2 0.00 0.00 0.00 Spread 3 0.00 0.00 0.00 Net Interest 302,061.68 450,926.57 2,329,983.36 Realized Loss Amount 0.00 0.00 0.00 Cumulative Realized Loss 0.00 0.00 0.00 Percentage of Cumulative Losses 0.0000 0.0000 0.0000 Prepayment Penalties 0.00 0.00 0.00 Special Servicing Fee 0.00 0.00 0.00 Pass-Through Rate 5.779698 7.158432 6.284966

~~TRANSACTIONS,~~Miscellaneous ~~INC~~Reporting Group 1 Subordinate % 6.026874% Senior Prepayment % 100.000000% Senior % 93.973126% Group 2 Subordinate % 6.439512% Senior Prepayment % 100.000000% Senior % 93.560488% Group 3 Subordinate % 6.184090% Senior Prepayment % 100.000000% Senior % 93.815910%

~~By:~~Miscellaneous ~~/s/~~Reporting ~~Steve~~Group ~~Warjanka~~ 4 Subordinate % 6.105845% Senior Prepayment % 100.000000% Senior % 93.894155% Group 5 Subordinate % 7.190101% Senior Prepayment % 100.000000% Senior % 92.809899% Group 6 Subordinate % 6.982994% Senior Prepayment % 100.000000% Senior % 93.017006%

~~Name: Steve~~Miscellaneous ~~Warjanka~~Reporting Group 7 Subordinate % 7.134228% Senior Prepayment % 100.000000% Senior % 92.865772% Group 8 Subordinate % 7.844760% Senior Prepayment % 100.000000% Senior % 92.155240%

Title: Associate Director

By: /s/ Glenn McIntyre

Name: Glenn McIntyre

Title: Associate Director

Dated: April 22, 2004

Exhibit Index

Exhibit

Page

99.1

Pooling and Servicing Agreement dated as of March 1, 2004,

by and among the Company, the Transferor, the Master Servicer,

the Custodian and the Trustee.

MCKEE NELSON LLP

5 Times Square, 35th Floor

New York, New York 10036

Telephone: (917) 777-4200

Facsimile: (917) 777-4299

April 23, 2004

BY MODEM

Securities and Exchange Commission

Judiciary Plaza

450 Fifth Street, N.W.

Washington, D.C. 20549

Re:

Mortgage Asset Securitization Transactions, Inc.

MASTR Alternative Loan Trust 2004-3, Mortgage Pass-Through Certificates, Series 2004-3

Ladies and Gentlemen:

On behalf of Mortgage Asset Securitization Transactions, Inc. (the “Company”), we enclose herewith for filing, pursuant to the Securities and Exchange Act of 1934, as amended, the Company’s Current Report on Form 8-K, for filing of the Pooling and Servicing Agreement in connection with the above-referenced transaction.

Very truly yours,

/s/ Julian A.C. Stapleford

Julian A.C. Stapleford

Enclosure

Filing Compare · MORTGAGE ASSET SEC TRANS MASTR ALTERNATIVE LOAN TRUST 2004-3