8-K 1 wfm0400m_sep.txt SEPTEMBER 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): September 27, 2004 WELLS FARGO ASSET SECURITIES CORPORATION Mortgage Pass-Through Certificates, Series 2004-M Trust (Exact name of registrant as specified in its charter) New York (governing law of 333-116509-02 54-6636472 Pooling and Servicing Agreement) (Commission 54-6636473 (State or other File Number) IRS EIN jurisdiction 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) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): [ ] Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) [ ] Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) [ ] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act(17 CFR 240.14d-2(b)) [ ] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act(17 CFR 240.13e-4(c)) ITEM 8.01 Other Events On September 27, 2004 a distribution was made to holders of WELLS FARGO ASSET SECURITIES CORPORATION, Mortgage Pass-Through Certificates, Series 2004-M Trust. ITEM 9.01 Financial Statements and Exhibits (c) Exhibits Exhibit Number Description EX-99.1 Monthly report distributed to holders of Mortgage Pass-Through Certificates, Series 2004-M Trust, relating to the September 27, 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. WELLS FARGO ASSET SECURITIES CORPORATION Mortgage Pass-Through Certificates, Series 2004-M Trust (Registrant) 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: 10/1/2004 INDEX TO EXHIBITS Exhibit Number Description EX-99.1 Monthly report distributed to holders of Mortgage Pass-Through Certificates, Series 2004-M Trust, relating to the September 27, 2004 distribution. EX-99.1

Wells Fargo Asset Securities Corporation Mortgage Pass-Through Certificates Record Date: 78/31/042004 Distribution Date: 89/2527/042004 WFMBS Series: 2004-M 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 A-1 94979UAA1 SEN 4.~~73778~~73354% ~~400~~396,~~000~~902,~~000~~873.0089 1,~~579~~565,~~157~~487.2763 32,~~097~~498,~~126~~972.1101 A-2 94979UAB9 SEN 2.79000% 7067,~~120~~204,~~000~~675.0019 ~~163~~156,~~018~~236.4758 2,~~915~~352,~~324~~282.8135 A-3 94979UAC7 SEN 4.~~73778~~73354% 60,497,000.00 238,~~835~~615.6982 0.00 A-4 94979UAD5 SEN 4.~~73778~~73354% 88,937,000.00 ~~351~~350,~~113~~790.7854 0.00 A-5 94979UAE3 SEN 4.~~73778~~73354% 49,497,000.00 195,~~408~~228.8798 0.00 A-6 94979UAF0 SEN 4.~~73778~~73354% 19,841,000.00 78,~~330~~258.1504 0.00 A-7 94979UAG8 SEN 4.~~73778~~73354% 87,628,000.00 345,~~945~~627.9851 0.00 A-8 94979UAH6 SEN 1.~~94778~~94354% 0.00 ~~113~~108,~~807~~836.8005 0.00 A-R 94979UAJ2 SEN 4.~~73778~~73109% 500.00 0.2000 500.00 A-LR 94979UAK9 SEN 4.~~73778~~73109% 500.00 0.2000 500.00 B-1 94979UAL7 SUB 4.~~73778~~73354% 9,~~206~~201,~~000~~389.0093 36,~~344~~292.3066 4,~~610~~643.0740 B-2 94979UAM5 SUB 4.~~73778~~73354% 6,~~404~~400,~~000~~793.0008 25,~~282~~246.3138 3,~~206~~230.9210 B-3 94979UAN3 SUB 4.~~73778~~73354% 3,~~602~~600,~~000~~196.0023 14,~~220~~200.3111 1,~~803~~816.7781 B-4 94979UAP8 SUB 4.~~73778~~73354% 2,~~402~~400,~~000~~797.0016 9,~~482~~469.8437 1,~~202~~211.8454 B-5 94979UAQ6 SUB 4.~~73778~~73354% 1,~~601~~600,~~000~~198.0027 6,~~320~~311.5860 ~~801~~807.7353 B-6 94979UAR4 SUB 4.~~73778~~73354% 801,~~670~~268.3186 3,~~164~~160.9141 ~~401~~404.4535 Totals ~~800~~794,~~536~~512,~~770~~192.3161 3,~~160~~133,~~433~~761.6668 64,~~024~~863,~~577~~368.7009

Certificateholder Distribution Summary (continued) Current Ending Cumulative Realized Certificate Total Realized Class Loss Balance Distribution Losses A-1 0.00 ~~396~~394,~~902~~403,~~873~~901.8988 4,~~676~~064,~~283~~459.3864 0.00 A-2 0.00 6764,~~204~~852,~~675~~392.1984 32,~~078~~508,~~343~~518.2893 0.00 A-3 0.00 60,497,000.00 238,~~835~~615.6982 0.00 A-4 0.00 88,937,000.00 ~~351~~350,~~113~~790.7854 0.00 A-5 0.00 49,497,000.00 195,~~408~~228.8798 0.00 A-6 0.00 19,841,000.00 78,~~330~~258.1504 0.00 A-7 0.00 87,628,000.00 345,~~945~~627.9851 0.00 A-8 0.00 0.00 ~~113~~108,~~807~~836.8005 0.00 A-R 0.00 0.00 500.2000 0.00 A-LR 0.00 0.00 500.2000 0.00 B-1 0.00 9,~~201~~196,~~389~~746.9353 40,~~954~~936.3706 0.00 B-2 0.00 6,~~400~~397,~~793~~562.0898 28,~~489~~476.2348 0.00 B-3 0.00 3,~~600~~598,~~196~~379.2343 16,~~024~~016.0892 0.00 B-4 0.00 2,~~400~~399,~~797~~585.1662 10,~~685~~680.6891 0.00 B-5 0.00 1,~~600~~599,~~198~~390.2775 7,~~122~~119.3113 0.00 B-6 0.00 ~~801~~800,~~268~~864.8651 3,~~566~~564.3676 0.00 Totals 0.00 ~~794~~789,~~512~~648,~~192~~824.6154 97,~~185~~997,~~011~~129.3677 0.00 All distributions required by the Pooling and Servicing Agreement have been calculated by the Certificate Administrator on behalf of the Trustee.

Principal Distribution Statement Original Beginning Scheduled Unscheduled Face Certificate Principal Principal Realized Class Amount Balance Distribution Distribution Accretion Loss (1) A-1 400,000,000.00 ~~400~~396,~~000~~902,~~000~~873.0089 200,~~303~~293.7844 2,~~896~~298,~~822~~678.3357 0.00 0.00 A-2 70,120,000.00 7067,~~120~~204,~~000~~675.0019 188,~~545~~536.9522 2,~~726~~163,~~778~~746.8613 0.00 0.00 A-3 60,497,000.00 60,497,000.00 0.00 0.00 0.00 0.00 A-4 88,937,000.00 88,937,000.00 0.00 0.00 0.00 0.00 A-5 49,497,000.00 49,497,000.00 0.00 0.00 0.00 0.00 A-6 19,841,000.00 19,841,000.00 0.00 0.00 0.00 0.00 A-7 87,628,000.00 87,628,000.00 0.00 0.00 0.00 0.00 A-8 0.00 0.00 0.00 0.00 0.00 0.00 A-R 50.00 500.00 30.2300 460.7700 0.00 0.00 A-LR 50.00 500.00 30.2300 460.7700 0.00 0.00 B-1 9,206,000.00 9,~~206~~201,~~000~~389.0093 4,~~610~~643.0740 0.00 0.00 0.00 B-2 6,404,000.00 6,~~404~~400,~~000~~793.0008 3,~~206~~230.9210 0.00 0.00 0.00 B-3 3,602,000.00 3,~~602~~600,~~000~~196.0023 1,~~803~~816.7781 0.00 0.00 0.00 B-4 2,402,000.00 2,~~402~~400,~~000~~797.0016 1,~~202~~211.8454 0.00 0.00 0.00 B-5 1,601,000.00 1,~~601~~600,~~000~~198.0027 ~~801~~807.7353 0.00 0.00 0.00 B-6 801,670.31 801,~~670~~268.3186 ~~401~~404.4535 0.00 0.00 0.00 Totals 800,536,770.31 ~~800~~794,~~536~~512,~~770~~192.3161 400,~~882~~943.9739 54,~~623~~462,~~694~~424.7370 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.

Principal Distribution Statement (continued) Total Ending Ending Total Principal Certificate Certificate Principal Class Reduction Balance Percentage Distribution A-1 32,~~097~~498,~~126~~972.1101 ~~396~~394,~~902~~403,~~873~~901.8988 0.~~99225718~~98600975 32,~~097~~498,~~126~~972.1101 A-2 2,~~915~~352,~~324~~282.8135 6764,~~204~~852,~~675~~392.1984 0.~~95842378~~92487725 2,~~915~~352,~~324~~282.8135 A-3 0.00 60,497,000.00 1.00000000 0.00 A-4 0.00 88,937,000.00 1.00000000 0.00 A-5 0.00 49,497,000.00 1.00000000 0.00 A-6 0.00 19,841,000.00 1.00000000 0.00 A-7 0.00 87,628,000.00 1.00000000 0.00 A-8 0.00 0.00 0.00000000 0.00 A-R 500.00 0.00 0.00000000 500.00 A-LR 500.00 0.00 0.00000000 500.00 B-1 4,~~610~~643.0740 9,~~201~~196,~~389~~746.9353 0.~~99949923~~99899484 4,~~610~~643.0740 B-2 3,~~206~~230.9210 6,~~400~~397,~~793~~562.0898 0.~~99949923~~99899484 3,~~206~~230.9210 B-3 1,~~803~~816.7781 3,~~600~~598,~~196~~379.2343 0.~~99949923~~99899484 1,~~803~~816.7781 B-4 1,~~202~~211.8454 2,~~400~~399,~~797~~585.1662 0.~~99949923~~99899485 1,~~202~~211.8454 B-5 ~~801~~807.7353 1,~~600~~599,~~198~~390.2775 0.~~99949923~~99899485 ~~801~~807.7353 B-6 ~~401~~404.4535 ~~801~~800,~~268~~864.8651 0.~~99949923~~99899485 ~~401~~404.4535 Totals 64,~~024~~863,~~577~~368.7009 ~~794~~789,~~512~~648,~~192~~824.6154 0.~~99247433~~98639919 64,~~024~~863,~~577~~368.7009

Principal Distribution Factors Statement Original Beginning Scheduled Unscheduled Face Certificate Principal Principal Class (2) Amount Balance Distribution Distribution Accretion A-1 400,000,000.00 ~~1000~~992.~~00000000~~25718472 0.~~50075945~~50073360 75.~~24205582~~74669643 0.00000000 A-2 70,120,000.00 ~~1000~~958.~~00000000~~42377624 2.~~68890402~~68876526 3830.~~88731974~~85775998 0.00000000 A-3 60,497,000.00 1000.00000000 0.00000000 0.00000000 0.00000000 A-4 88,937,000.00 1000.00000000 0.00000000 0.00000000 0.00000000 A-5 49,497,000.00 1000.00000000 0.00000000 0.00000000 0.00000000 A-6 19,841,000.00 1000.00000000 0.00000000 0.00000000 0.00000000 A-7 87,628,000.00 1000.00000000 0.00000000 0.00000000 0.00000000 A-8 0.00 0.00000000 0.00000000 0.00000000 0.00000000 A-R 50.00 ~~1000~~0.00000000 640.~~60000000~~00000000 ~~935~~0.~~40000000~~00000000 0.00000000 A-LR 50.00 ~~1000~~0.00000000 640.~~60000000~~00000000 ~~935~~0.~~40000000~~00000000 0.00000000 B-1 9,206,000.00 ~~1000~~999.~~00000000~~49923202 0.~~50076798~~50438844 0.00000000 0.00000000 B-2 6,404,000.00 ~~1000~~999.~~00000000~~49923173 0.~~50076827~~50438788 0.00000000 0.00000000 B-3 3,602,000.00 ~~1000~~999.~~00000000~~49923098 0.~~50076902~~50438923 0.00000000 0.00000000 B-4 2,402,000.00 ~~1000~~999.~~00000000~~49923397 0.~~50076603~~50438801 0.00000000 0.00000000 B-5 1,601,000.00 ~~1000~~999.~~00000000~~49923173 0.~~50076827~~50439101 0.00000000 0.00000000 B-6 801,670.31 ~~1000~~999.~~00000000~~49923305 0.~~50076695~~50438440 0.00000000 0.00000000 (2) Per $1000 denomination.

Principal Distribution Factors Statement (continued) Total Ending Ending Total Realized Principal Certificate Certificate Principal Class Loss (3) Reduction Balance Percentage Distribution A-1 0.00000000 76.~~74281528~~24743002 ~~992~~986.~~25718472~~00975470 0.~~99225718~~98600975 76.~~74281528~~24743002 A-2 0.00000000 4133.~~57622376~~54652524 ~~958~~924.~~42377624~~87725100 0.~~95842378~~92487725 4133.~~57622376~~54652524 A-3 0.00000000 0.00000000 1,000.00000000 1.00000000 0.00000000 A-4 0.00000000 0.00000000 1,000.00000000 1.00000000 0.00000000 A-5 0.00000000 0.00000000 1,000.00000000 1.00000000 0.00000000 A-6 0.00000000 0.00000000 1,000.00000000 1.00000000 0.00000000 A-7 0.00000000 0.00000000 1,000.00000000 1.00000000 0.00000000 A-8 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 A-R 0.00000000 ~~1,000~~0.00000000 0.00000000 0.00000000 ~~1,000~~0.00000000 A-LR 0.00000000 ~~1,000~~0.00000000 0.00000000 0.00000000 ~~1,000~~0.00000000 B-1 0.00000000 0.~~50076798~~50438844 ~~999~~998.~~49923202~~99484358 0.~~99949923~~99899484 0.~~50076798~~50438844 B-2 0.00000000 0.~~50076827~~50438788 ~~999~~998.~~49923173~~99484385 0.~~99949923~~99899484 0.~~50076827~~50438788 B-3 0.00000000 0.~~50076902~~50438923 ~~999~~998.~~49923098~~99484453 0.~~99949923~~99899484 0.~~50076902~~50438923 B-4 0.00000000 0.~~50076603~~50438801 ~~999~~998.~~49923397~~99484596 0.~~99949923~~99899485 0.~~50076603~~50438801 B-5 0.00000000 0.~~50076827~~50439101 ~~999~~998.~~49923173~~99484697 0.~~99949923~~99899485 0.~~50076827~~50439101 B-6 0.00000000 0.~~50076695~~50438440 ~~999~~998.~~49923305~~99484864 0.~~99949923~~99899485 0.~~50076695~~50438440 (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.

Interest Distribution Statement Beginning Payment of Original Current Certificate/ Current Unpaid Current Face Certificate Notional Accrued Interest Interest Class Amount Rate Balance Interest Shortfall Shortfall A-1 400,000,000.00 4.~~73778~~73354% ~~400~~396,~~000~~902,~~000~~873.0089 1,~~579~~565,~~259~~630.2882 0.00 0.00 A-2 70,120,000.00 2.79000% 7067,~~120~~204,~~000~~675.0019 ~~163~~156,~~029~~250.0087 0.00 0.00 A-3 60,497,000.00 4.~~73778~~73354% 60,497,000.00 238,~~851~~637.1265 0.00 0.00 A-4 88,937,000.00 4.~~73778~~73354% 88,937,000.00 ~~351~~350,~~136~~822.4663 0.00 0.00 A-5 49,497,000.00 4.~~73778~~73354% 49,497,000.00 195,~~421~~246.4983 0.00 0.00 A-6 19,841,000.00 4.~~73778~~73354% 19,841,000.00 78,~~335~~265.2120 0.00 0.00 A-7 87,628,000.00 4.~~73778~~73354% 87,628,000.00 345,~~968~~659.3312 0.00 0.00 A-8 0.00 1.~~94778~~94354% 7067,~~120~~204,~~000~~675.0019 ~~113~~108,~~815~~846.1500 0.00 0.00 A-R 50.00 4.~~73778~~73109% 500.00 0.2000 0.00 0.00 A-LR 50.00 4.~~73778~~73109% 500.00 0.2000 0.00 0.00 B-1 9,206,000.00 4.~~73778~~73354% 9,~~206~~201,~~000~~389.0093 36,~~346~~295.6598 0.00 0.00 B-2 6,404,000.00 4.~~73778~~73354% 6,~~404~~400,~~000~~793.0008 25,~~283~~248.9469 0.00 0.00 B-3 3,602,000.00 4.~~73778~~73354% 3,~~602~~600,~~000~~196.0023 14,~~221~~201.2340 0.00 0.00 B-4 2,402,000.00 4.~~73778~~73354% 2,~~402~~400,~~000~~797.0016 9,~~483~~470.4523 0.00 0.00 B-5 1,601,000.00 4.~~73778~~73354% 1,~~601~~600,~~000~~198.0027 6,~~320~~312.9917 0.00 0.00 B-6 801,670.31 4.~~73778~~73354% 801,~~670~~268.3186 3,~~165~~160.1170 0.00 0.00 Totals 800,536,770.31 3,~~160~~134,~~637~~048.8129 0.00 0.00

Interest Distribution Statement (continued) Remaining Ending Non-Supported Total Unpaid Certificate/ Interest Realized Interest Interest Notional Class Shortfall Losses (4) Distribution Shortfall Balance A-1 ~~102~~143.0119 0.00 1,~~579~~565,~~157~~487.2763 0.00 ~~396~~394,~~902~~403,~~873~~901.8988 A-2 1014.5329 0.00 ~~163~~156,~~018~~236.4758 0.00 6764,~~204~~852,~~675~~392.1984 A-3 1521.4383 0.00 238,~~835~~615.6982 0.00 60,497,000.00 A-4 2232.6809 0.00 ~~351~~350,~~113~~790.7854 0.00 88,937,000.00 A-5 1217.6286 0.00 195,~~408~~228.8798 0.00 49,497,000.00 A-6 57.0616 0.00 78,~~330~~258.1504 0.00 19,841,000.00 A-7 2231.3561 0.00 345,~~945~~627.9851 0.00 87,628,000.00 A-8 79.3595 0.00 ~~113~~108,~~807~~836.8005 0.00 6764,~~204~~852,~~675~~392.1984 A-R 0.00 0.00 0.2000 0.00 0.00 A-LR 0.00 0.00 0.2000 0.00 0.00 B-1 23.3532 0.00 36,~~344~~292.3066 0.00 9,~~201~~196,~~389~~746.9353 B-2 12.6331 0.00 25,~~282~~246.3138 0.00 6,~~400~~397,~~793~~562.0898 B-3 01.9230 0.00 14,~~220~~200.3111 0.00 3,~~600~~598,~~196~~379.2343 B-4 0.6187 0.00 9,~~482~~469.8437 0.00 2,~~400~~399,~~797~~585.1662 B-5 0.4158 0.00 6,~~320~~311.5860 0.00 1,~~600~~599,~~198~~390.2775 B-6 0.2029 0.00 3,~~164~~160.9141 0.00 ~~801~~800,~~268~~864.8651 Totals ~~204~~286.1565 0.00 3,~~160~~133,~~433~~761.6668 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.

Interest Distribution Factors Statement Beginning Payment of Original Current Certificate/ Current Unpaid Current Face Certificate Notional Accrued Interest Interest Class (5) Amount Rate Balance Interest Shortfall Shortfall A-1 400,000,000.00 4.~~73778~~73354% ~~1000~~992.~~00000000~~25718472 3.~~94814820~~91407705 0.00000000 0.00000000 A-2 70,120,000.00 2.79000% ~~1000~~958.~~00000000~~42377624 2.~~32500000~~22833528 0.00000000 0.00000000 A-3 60,497,000.00 4.~~73778~~73354% 1000.00000000 3.~~94814817~~94461957 0.00000000 0.00000000 A-4 88,937,000.00 4.~~73778~~73354% 1000.00000000 3.~~94814824~~94461956 0.00000000 0.00000000 A-5 49,497,000.00 4.~~73778~~73354% 1000.00000000 3.~~94814817~~94461947 0.00000000 0.00000000 A-6 19,841,000.00 4.~~73778~~73354% 1000.00000000 3.~~94814828~~94461973 0.00000000 0.00000000 A-7 87,628,000.00 4.~~73778~~73354% 1000.00000000 3.~~94814819~~94461953 0.00000000 0.00000000 A-8 0.00 1.~~94778~~94354% ~~1000~~958.~~00000000~~42377624 1.~~62314817~~55228180 0.00000000 0.00000000 A-R 50.00 4.~~73778~~73109% ~~1000~~0.00000000 40.00000000 0.00000000 0.00000000 A-LR 50.00 4.~~73778~~73109% ~~1000~~0.00000000 40.00000000 0.00000000 0.00000000 B-1 9,206,000.00 4.~~73778~~73354% ~~1000~~999.~~00000000~~49923202 3.~~94814795~~94264393 0.00000000 0.00000000 B-2 6,404,000.00 4.~~73778~~73354% ~~1000~~999.~~00000000~~49923173 3.~~94814803~~94264366 0.00000000 0.00000000 B-3 3,602,000.00 4.~~73778~~73354% ~~1000~~999.~~00000000~~49923098 3.~~94814825~~94264298 0.00000000 0.00000000 B-4 2,402,000.00 4.~~73778~~73354% ~~1000~~999.~~00000000~~49923397 3.~~94814738~~94264363 0.00000000 0.00000000 B-5 1,601,000.00 4.~~73778~~73354% ~~1000~~999.~~00000000~~49923173 3.~~94815116~~94264210 0.00000000 0.00000000 B-6 801,670.31 4.~~73778~~73354% ~~1000~~999.~~00000000~~49923305 3.~~94814422~~94264320 0.00000000 0.00000000 (5) All classes are per $1000 denomination.

Interest Distribution Factors Statement (continued) Remaining Ending Non-Supported Total Unpaid Certificate/ Interest Realized Interest Interest Notional Class Shortfall Losses (6) Distribution Shortfall Balance A-1 0.~~00025503~~00035798 0.00000000 3.~~94789317~~91371908 0.00000000 ~~992~~986.~~25718472~~00975470 A-2 0.~~00015017~~00020379 0.00000000 2.~~32484983~~22813149 0.00000000 ~~958~~924.~~42377624~~87725100 A-3 0.~~00025505~~00036084 0.00000000 3.~~94789312~~94425872 0.00000000 1000.00000000 A-4 0.~~00025501~~00036082 0.00000000 3.~~94789323~~94425874 0.00000000 1000.00000000 A-5 0.~~00025496~~00036083 0.00000000 3.~~94789321~~94425884 0.00000000 1000.00000000 A-6 0.~~00025503~~00036087 0.00000000 3.~~94789325~~94425886 0.00000000 1000.00000000 A-7 0.~~00025506~~00036073 0.00000000 3.~~94789314~~94425880 0.00000000 1000.00000000 A-8 0.~~00010482~~00014190 0.00000000 1.~~62304335~~55213990 0.00000000 ~~958~~924.~~42377624~~87725100 A-R 0.00000000 0.00000000 40.00000000 0.00000000 0.00000000 A-LR 0.00000000 0.00000000 40.00000000 0.00000000 0.00000000 B-1 0.~~00025527~~00036063 0.00000000 3.~~94789268~~94228329 0.00000000 ~~999~~998.~~49923202~~99484358 B-2 0.~~00025453~~00036071 0.00000000 3.~~94789350~~94228295 0.00000000 ~~999~~998.~~49923173~~99484385 B-3 0.~~00025541~~00036091 0.00000000 3.~~94789284~~94228484 0.00000000 ~~999~~998.~~49923098~~99484453 B-4 0.~~00025396~~00036220 0.00000000 3.~~94789342~~94228560 0.00000000 ~~999~~998.~~49923397~~99484596 B-5 0.~~00025609~~00036227 0.00000000 3.~~94789507~~94228607 0.00000000 ~~999~~998.~~49923173~~99484697 B-6 0.~~00024948~~00036174 0.00000000 3.~~94789474~~94228146 0.00000000 ~~999~~998.~~49923305~~99484864 (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.

CERTIFICATEHOLDER ACCOUNT STATEMENT CERTIFICATE ACCOUNT Beginning Balance 0115,303.0092 Deposits Payments of Interest and Principal 98,~~470~~175,~~747~~574.4734 Liquidations, Insurance Proceeds, Reserve Funds 0.00 Proceeds from Repurchased Loans 0.00 Other Amounts (Servicer Advances) 0.00 Realized Loss (Gains, Subsequent Expenses & Recoveries) 0.00 Prepayment Penalties 0.00 Total Deposits 98,~~470~~175,~~747~~574.4734 Withdrawals Reimbursement for Servicer Advances 0.00 Payment of Service Fee 170,~~432~~428.2101 Payment of Interest and Principal 97,~~185~~997,~~011~~129.3476 Total Withdrawals (Pool Distribution Amount) 98,~~355~~167,~~443~~557.5577 Ending Balance ~~115~~123,~~303~~320.9249

PREPAYMENT/CURTAILMENT INTEREST SHORTFALL Total Prepayment/Curtailment Interest Shortfall 31,~~210~~984.4306 Servicing Fee Support 31,~~006~~697.2841 Non-Supported Prepayment/Curtailment Interest Shortfall ~~204~~286.1565

SERVICING FEES Gross Servicing Fee ~~166~~165,~~767~~505.7822 Master Servicing Fee 6,~~670~~620.7121 Supported Prepayment/Curtailment Interest Shortfall 31,~~006~~697.2841 Net Servicing Fee 170,~~432~~428.2101

LOAN 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 21 0 0 0 21 ~~803~~100,000.00 0.00 0.00 0.00 ~~803~~100,000.00 60 Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 90 Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 120 Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 150 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 21 0 0 0 21 ~~803~~100,000.00 0.00 0.00 0.00 ~~803~~100,000.00 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 0.~~108637~~054645% 0.000000% 0.000000% 0.000000% 0.~~108637~~054645% 0.~~101356~~012659% 0.000000% 0.000000% 0.000000% 0.~~101356~~012659% 60 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 90 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 120 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 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 0.~~108637~~054645% 0.000000% 0.000000% 0.000000% 0.~~108637~~054645% 0.~~101356~~012659% 0.000000% 0.000000% 0.000000% 0.~~101356~~012659%

OTHER INFORMATION Current Period Class A Insufficient Funds 0.00 Principal Balance of Contaminated Properties 0.00 Periodic Advance ~~114~~94,~~503~~822.9871

SUBORDINATION LEVEL/CLASS PERCENTAGE AND PREPAYMENT PERCENTAGE Current Original $ Original % Current $ Current % Class% Prepayment% Class A 24,016,670.31 3.00007085% 2423,~~004~~992,~~643~~529.5382 3.~~02130587~~03837973% 96.~~978694~~961620% 100.000000% Class B-1 14,810,670.31 1.85009245% 14,~~803~~795,~~253~~783.6029 1.~~86318772~~87371688% 1.~~158118~~164663% 0.000000% Class B-2 8,406,670.31 1.05012919% 8,~~402~~398,~~460~~220.5231 1.~~05756219~~06353863% 0.~~805626~~810178% 0.000000% Class B-3 4,804,670.31 0.60018109% 4,~~802~~799,~~264~~840.2988 0.~~60442928~~60784500% 0.~~453133~~455694% 0.000000% Class B-4 2,402,670.31 0.30013241% 2,~~401~~400,~~467~~255.1326 0.~~30225680~~30396490% 0.~~302172~~303880% 0.000000% Class B-5 801,670.31 0.10014160% ~~801~~800,~~268~~864.8651 0.~~10085042~~10142034% 0.~~201406~~202545% 0.000000% Class B-6 0.00 0.00000000% 0.00 0.00000000% 0.~~100850~~101420% 0.000000% Please Refer to the Prospectus Supplement for a Full Description of Loss Exposure

COLLATERAL STATEMENT Collateral Description 7/1 CMT ARM Weighted Average Gross Coupon 4.~~997776~~993630% Weighted Average Net Coupon 4.~~737776~~733630% Weighted Average Pass-Through Rate 4.~~737776~~733630% Weighted Average Maturity(Stepdown Calculation ) ~~358~~357 Beginning Scheduled Collateral Loan Count 1,~~852~~841 Number Of Loans Paid In Full 11 Ending Scheduled Collateral Loan Count 1,~~841~~830 Beginning Scheduled Collateral Balance ~~800~~794,~~536~~512,~~770~~192.3162 Ending Scheduled Collateral Balance ~~794~~789,~~512~~648,~~192~~824.6256 Ending Actual Collateral Balance at 31-~~Jul~~Aug-2004 ~~792~~789,~~257~~954,~~950~~368.0105 Monthly P &I Constant 3,~~735~~711,~~780~~087.7419 Special Servicing Fee 0.00 Prepayment Penalties 0.00 Realized Loss Amount 0.00 Cumulative Realized Loss 0.00 Class A Optimal Amount 97,~~078~~890,~~367~~613.3548 Ending scheduled Balance For discounted Loans ~~794~~789,~~512~~648,~~192~~824.6256 Scheduled Principal 400,~~882~~943.9739 Unscheduled Principal 54,~~623~~462,~~694~~424.7270 Unpaid Principal Balance Of Outstanding Mortgage Loans With Original LTV: Less Than Or Equal To 80% ~~785~~780,~~368~~501,~~021~~001.1563 Greater Than 80%, less than or equal to 85% 1,213,~~770~~408.8648 Greater than 85%, less than or equal to 95% 6,~~844~~841,~~477~~790.7284 Greater than 95% 1,080,900.00

Filing Compare · Wells Fargo Mortgage Backed Securities Series 2004-M