8-K 1 ba845888-8k.txt CURRENT REPORT 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: April 28, 2005 (Date of earliest event reported) Banc of America Mortgage Securities, Inc. -------------------------------------------------------------------------------- (Exact name of registrant as specified in its charter) Delaware 333-118843 36-4514369 -------------------------------------------------------------------------------- (State or other jurisdiction (Commission File No.) (IRS Employer of incorporation) Identification No.) 201 North Tryon Street, Charlotte, North Carolina 28255 -------------------------------------------------------------------------------- Address of principal executive offices (Zip Code) Registrant's telephone number, including area code (704) 387-8239 ------------------------------ -------------------------------------------------------------------------------- (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: [ ] 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 April 28, 2005, Banc of America Mortgage Securities, Inc., a Delaware corporation (the "Registrant"), sold Banc of America Alternative Loan Trust 2005-4 Mortgage Pass-Through Certificates, Series 2005-4, Class CB-1, Class CB-2, Class CB-3, Class CB-4, Class CB-5, Class CB-6, Class CB-7, Class CB-8, Class CB-9, Class CB-10, Class CB-11, Class CB-12, Class CB-13, Class CB-R, Class CB-IO, Class 2-A-1, Class 3-A-1, Class 15-IO, Class A-PO, Class B-1, Class B-2 and Class B-3 (the "Offered Certificates"), having an aggregate original principal balance of $353,152,580.00. The Offered Certificates were issued pursuant to a Pooling and Servicing Agreement, dated April 28, 2005, among the Registrant, Bank of America, N.A., as servicer ("BANA"), and Wells Fargo Bank, N.A., as trustee (the "Agreement"), a copy of which is filed as an exhibit hereto. Mortgage Pass-Through Certificates, Series 2005-4, Class B-4, Class B-5 and Class B-6 Certificates, having an aggregate initial principal balance of $3,207,420.00 (the "Private Certificates" and, together with the Offered Certificates, the "Certificates"), were also issued pursuant to the Agreement. As of the date of initial issuance, the Offered Certificates evidenced an approximate 99.10% undivided interest in a trust (the "Trust"), consisting principally of three pools of fixed interest rate, conventional, monthly pay, fully-amortizing, one- to four-family residential first mortgage loans. The remaining undivided interests in the Trust are evidenced by the Private Certificates distributions on which are subordinated to distributions on the Offered Certificates. Interest on the Offered Certificates will be distributed on each Distribution Date (as defined in the Agreement). Monthly distributions in reduction of the principal balance of the Offered Certificates will be allocated to the Offered Certificates in accordance with the priorities set forth in the Agreement. Distributions of interest and in reduction of principal balance on any Distribution Date will be made to the extent that the related Pool Distribution Amount is sufficient therefor. Elections will be made to treat the Trust as three separate REMICs for federal income tax purposes (the "Lower-Tier REMIC," "Middle-Tier REMIC" and "Upper-Tier REMIC" and each a "REMIC"). The Class CB-1, Class CB-2, Class CB-3, Class CB-4, Class CB-5, Class CB-6, Class CB-7, Class CB-8, Class CB-9, Class CB-10, Class CB-11, Class CB-12, Class CB-13, Class CB-IO, Class 2-A-1, Class 3-A-1, Class B-1, Class B-2, Class B-3, Class B-4, Class B-5 and Class B-6 Certificates and each IO Component and each PO Component will be treated as "regular interests" in the Upper-REMIC and the Class CB-R Certificate will be treated as the "residual interest" in the Upper-Tier REMIC, Middle-Tier REMIC and "Lower-Tier REMIC, respectively. ITEM 9.01 Financial Statements and Exhibits --------------------------------- (c) Exhibits Item 601(a) of Regulation S-K Exhibit No. Description ----------- ----------- (4) Pooling and Servicing Agreement, dated April 28, 2005, among Banc of America Mortgage Securities, Inc., Bank of America, N.A. and Wells Fargo Bank, N.A., as trustee. 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. BANC OF AMERICA MORTGAGE SECURITIES, INC. April 28, 2005 By: /s/ Judy Lowman ----------------- Name: Judy Lowman Title: Vice President INDEX TO EXHIBITS Paper (P) or Exhibit No. Description Electronic (E) ----------- ----------- -------------- (4) Pooling and Servicing Agreement, E dated April 28, 2005 among Banc of America Mortgage Securities, Inc., Bank of America, N.A. and Wells Fargo Bank, N.A., as trustee.

Banc of America Alternative Loan Trust Mortgage Pass-Through Certificates Record Date: 5/31/2005 Distribution Date: 6/27/2005 Banc of America Alternative Loan Trust Mortgage Pass-Through Certificates Series 2005-4 Contact: Customer Service - CTSLink Wells Fargo Bank, N.A. Securities Administration Services 7485 New Horizon Way Frederick, MD 21703 www.ctslink.com Telephone: (301) 815-6600 Fax: (301) 815-6660 Certificateholder Distribution Summary Certificate Certificate Beginning Class Pass-Through Certificate Interest Class CUSIP Description Rate Balance Distribution CB-1 05948KZA0 SEN 3.49000% 49,825,149.21 144,908.14 CB-2 05948KZB8 SEN 3.59000% 88,476,541.95 264,692.32 CB-3 05948KZC6 SEN 1.91000% 0.00 140,825.16 CB-4 05948KZD4 SEN 2.01000% 0.00 83,457.12 CB-5 05948KZE2 SEN 5.50000% 9,000,000.00 41,250.00 CB-6 05948KZF9 SEN 3.49000% 87,453,094.13 254,342.75 CB-7 05948KZG7 SEN 2.01000% 0.00 146,483.93 CB-8 05948KZH5 SEN 5.50000% 20,000,000.00 91,666.67 CB-9 05948KZJ1 SEN 5.50000% 833,000.00 3,817.92 CB-10 05948KZK8 SEN 5.50000% 12,544,232.08 57,494.40 CB-11 05948KZL6 SEN 5.50000% 5,229,767.92 23,969.77 CB-12 05948KZM4 SEN 5.50000% 4,315,248.90 19,778.22 CB-13 05948KZN2 SEN 5.50000% 12,410,000.00 56,879.17 CB-R 05948KZP7 SEN 5.50000% 0.00 0.00 CB-IO 05948KZQ5 SEN 5.50000% 0.00 75,777.86 2-A-1 05948KZR3 SEN 5.00000% 20,005,578.20 83,356.58 3-A-1 05948KZS1 SEN 5.50000% 29,693,818.42 136,096.67 A-PO 05948KZU6 PO 0.00000% 1,246,965.80 0.00 15-IO 05948KZT9 SEN 5.50000% 0.00 4,467.35 B-1 05948KZV4 SUB 5.47043% 6,406,105.44 29,203.48 B-2 05948KZW2 SUB 5.47043% 2,669,293.82 12,168.49 B-3 05948KZX0 SUB 5.47043% 1,957,282.41 8,922.65 B-4 05948KZY8 SUB 5.47043% 1,245,271.00 5,676.81 B-5 05948KZZ5 SUB 5.47043% 712,011.41 3,245.84 B-6 05948KA25 SUB 5.47043% 1,245,691.22 5,678.73 Totals 355,269,051.91 1,694,160.03

Certificateholder Distribution Summary (continued) Current Ending Cumulative Principal Realized Certificate Total Realized Class Distribution Loss Balance Distribution Losses CB-1 483,501.52 0.00 49,341,647.69 628,409.66 0.00 CB-2 1,063,112.44 0.00 87,413,429.51 1,327,804.76 0.00 CB-3 0.00 0.00 0.00 140,825.16 0.00 CB-4 0.00 0.00 0.00 83,457.12 0.00 CB-5 0.00 0.00 9,000,000.00 41,250.00 0.00 CB-6 848,663.33 0.00 86,604,430.81 1,103,006.08 0.00 CB-7 0.00 0.00 0.00 146,483.93 0.00 CB-8 0.00 0.00 20,000,000.00 91,666.67 0.00 CB-9 0.00 0.00 833,000.00 3,817.92 0.00 CB-10 (57,494.40) 0.00 12,601,726.48 0.00 0.00 CB-11 57,494.40 0.00 5,172,273.52 81,464.17 0.00 CB-12 51,850.97 0.00 4,263,397.93 71,629.19 0.00 CB-13 0.00 0.00 12,410,000.00 56,879.17 0.00 CB-R 0.00 0.00 0.00 0.00 0.00 CB-IO 0.00 0.00 0.00 75,777.86 0.00 2-A-1 81,095.91 0.00 19,924,482.29 164,452.49 0.00 3-A-1 110,958.38 0.00 29,582,860.03 247,055.05 0.00 A-PO 6,058.92 0.00 1,240,906.88 6,058.92 0.00 15-IO 0.00 0.00 0.00 4,467.35 0.00 B-1 8,888.98 0.00 6,397,216.46 38,092.46 0.00 B-2 3,703.86 0.00 2,665,589.96 15,872.35 0.00 B-3 2,715.88 0.00 1,954,566.53 11,638.53 0.00 B-4 1,727.91 0.00 1,243,543.09 7,404.72 0.00 B-5 987.97 0.00 711,023.44 4,233.81 0.00 B-6 1,728.39 0.00 1,243,962.83 7,407.12 0.00 Totals 2,664,994.46 0.00 352,604,057.45 4,359,154.49 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) CB-1 50,000,000.00 49,825,149.21 57,708.71 425,792.81 0.00 0.00 CB-2 88,861,000.00 88,476,541.95 126,888.63 936,223.81 0.00 0.00 CB-3 0.00 0.00 0.00 0.00 0.00 0.00 CB-4 0.00 0.00 0.00 0.00 0.00 0.00 CB-5 9,000,000.00 9,000,000.00 0.00 0.00 0.00 0.00 CB-6 87,760,000.00 87,453,094.13 101,292.89 747,370.44 0.00 0.00 CB-7 0.00 0.00 0.00 0.00 0.00 0.00 CB-8 20,000,000.00 20,000,000.00 0.00 0.00 0.00 0.00 CB-9 833,000.00 833,000.00 0.00 0.00 0.00 0.00 CB-10 12,487,000.00 12,544,232.08 0.00 0.00 (57,494.40) 0.00 CB-11 5,287,000.00 5,229,767.92 6,862.29 50,632.11 0.00 0.00 CB-12 4,334,000.00 4,315,248.90 6,188.71 45,662.26 0.00 0.00 CB-13 12,410,000.00 12,410,000.00 0.00 0.00 0.00 0.00 CB-R 100.00 0.00 0.00 0.00 0.00 0.00 CB-IO 0.00 0.00 0.00 0.00 0.00 0.00 2-A-1 20,082,000.00 20,005,578.20 73,781.27 7,314.64 0.00 0.00 3-A-1 29,801,000.00 29,693,818.42 105,199.73 5,758.65 0.00 0.00 A-PO 1,249,480.28 1,246,965.80 2,471.80 3,587.12 0.00 0.00 15-IO 0.00 0.00 0.00 0.00 0.00 0.00 B-1 6,415,000.00 6,406,105.44 8,888.98 0.00 0.00 0.00 B-2 2,673,000.00 2,669,293.82 3,703.86 0.00 0.00 0.00 B-3 1,960,000.00 1,957,282.41 2,715.88 0.00 0.00 0.00 B-4 1,247,000.00 1,245,271.00 1,727.91 0.00 0.00 0.00 B-5 713,000.00 712,011.41 987.97 0.00 0.00 0.00 B-6 1,247,420.00 1,245,691.22 1,728.39 0.00 0.00 0.00 Totals 356,360,000.28 355,269,051.91 500,147.02 2,222,341.84 (57,494.40) 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 CB-1 483,501.52 49,341,647.69 0.98683295 483,501.52 CB-2 1,063,112.44 87,413,429.51 0.98370972 1,063,112.44 CB-3 0.00 0.00 0.00000000 0.00 CB-4 0.00 0.00 0.00000000 0.00 CB-5 0.00 9,000,000.00 1.00000000 0.00 CB-6 848,663.33 86,604,430.81 0.98683262 848,663.33 CB-7 0.00 0.00 0.00000000 0.00 CB-8 0.00 20,000,000.00 1.00000000 0.00 CB-9 0.00 833,000.00 1.00000000 0.00 CB-10 (57,494.40) 12,601,726.48 1.00918767 (57,494.40) CB-11 57,494.40 5,172,273.52 0.97830027 57,494.40 CB-12 51,850.97 4,263,397.93 0.98370972 51,850.97 CB-13 0.00 12,410,000.00 1.00000000 0.00 CB-R 0.00 0.00 0.00000000 0.00 CB-IO 0.00 0.00 0.00000000 0.00 2-A-1 81,095.91 19,924,482.29 0.99215627 81,095.91 3-A-1 110,958.38 29,582,860.03 0.99268011 110,958.38 A-PO 6,058.92 1,240,906.88 0.99313843 6,058.92 15-IO 0.00 0.00 0.00000000 0.00 B-1 8,888.98 6,397,216.46 0.99722782 8,888.98 B-2 3,703.86 2,665,589.96 0.99722782 3,703.86 B-3 2,715.88 1,954,566.53 0.99722782 2,715.88 B-4 1,727.91 1,243,543.09 0.99722782 1,727.91 B-5 987.97 711,023.44 0.99722783 987.97 B-6 1,728.39 1,243,962.83 0.99722854 1,728.39 Totals 2,664,994.46 352,604,057.45 0.98946026 2,664,994.46

Principal Distribution Factors Statement Original Beginning Scheduled Unscheduled Face Certificate Principal Principal Class (2) Amount Balance Distribution Distribution Accretion CB-1 50,000,000.00 996.50298420 1.15417420 8.51585620 0.00000000 CB-2 88,861,000.00 995.67348949 1.42794511 10.53582348 0.00000000 CB-3 0.00 0.00000000 0.00000000 0.00000000 0.00000000 CB-4 0.00 0.00000000 0.00000000 0.00000000 0.00000000 CB-5 9,000,000.00 1000.00000000 0.00000000 0.00000000 0.00000000 CB-6 87,760,000.00 996.50289574 1.15420340 8.51607156 0.00000000 CB-7 0.00 0.00000000 0.00000000 0.00000000 0.00000000 CB-8 20,000,000.00 1000.00000000 0.00000000 0.00000000 0.00000000 CB-9 833,000.00 1000.00000000 0.00000000 0.00000000 0.00000000 CB-10 12,487,000.00 1004.58333307 0.00000000 0.00000000 (4.60434051) CB-11 5,287,000.00 989.17494231 1.29795536 9.57671837 0.00000000 CB-12 4,334,000.00 995.67348869 1.42794416 10.53582372 0.00000000 CB-13 12,410,000.00 1000.00000000 0.00000000 0.00000000 0.00000000 CB-R 100.00 0.00000000 0.00000000 0.00000000 0.00000000 CB-IO 0.00 0.00000000 0.00000000 0.00000000 0.00000000 2-A-1 20,082,000.00 996.19451250 3.67400010 0.36423862 0.00000000 3-A-1 29,801,000.00 996.40342338 3.53007382 0.19323680 0.00000000 A-PO 1,249,480.28 997.98757928 1.97826251 2.87088965 0.00000000 15-IO 0.00 0.00000000 0.00000000 0.00000000 0.00000000 B-1 6,415,000.00 998.61347467 1.38565549 0.00000000 0.00000000 B-2 2,673,000.00 998.61347550 1.38565657 0.00000000 0.00000000 B-3 1,960,000.00 998.61347449 1.38565306 0.00000000 0.00000000 B-4 1,247,000.00 998.61347233 1.38565357 0.00000000 0.00000000 B-5 713,000.00 998.61347826 1.38565217 0.00000000 0.00000000 B-6 1,247,420.00 998.61411553 1.38557182 0.00000000 0.00000000 (2) All classes are per 1,000 dollar denomination.

Principal Distribution Factors Statement (continued) Total Ending Ending Total Realized Principal Certificate Certificate Principal Class Loss (3) Reduction Balance Percentage Distribution CB-1 0.00000000 9.67003040 986.83295380 0.98683295 9.67003040 CB-2 0.00000000 11.96376858 983.70972091 0.98370972 11.96376858 CB-3 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 CB-4 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 CB-5 0.00000000 0.00000000 1,000.00000000 1.00000000 0.00000000 CB-6 0.00000000 9.67027495 986.83262090 0.98683262 9.67027495 CB-7 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 CB-8 0.00000000 0.00000000 1,000.00000000 1.00000000 0.00000000 CB-9 0.00000000 0.00000000 1,000.00000000 1.00000000 0.00000000 CB-10 0.00000000 (4.60434051) 1,009.18767358 1.00918767 (4.60434051) CB-11 0.00000000 10.87467373 978.30026858 0.97830027 10.87467373 CB-12 0.00000000 11.96376788 983.70972081 0.98370972 11.96376788 CB-13 0.00000000 0.00000000 1,000.00000000 1.00000000 0.00000000 CB-R 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 CB-IO 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 2-A-1 0.00000000 4.03823872 992.15627378 0.99215627 4.03823872 3-A-1 0.00000000 3.72331063 992.68011241 0.99268011 3.72331063 A-PO 0.00000000 4.84915216 993.13842712 0.99313843 4.84915216 15-IO 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 B-1 0.00000000 1.38565549 997.22781917 0.99722782 1.38565549 B-2 0.00000000 1.38565657 997.22781893 0.99722782 1.38565657 B-3 0.00000000 1.38565306 997.22782143 0.99722782 1.38565306 B-4 0.00000000 1.38565357 997.22781877 0.99722782 1.38565357 B-5 0.00000000 1.38565217 997.22782609 0.99722783 1.38565217 B-6 0.00000000 1.38557182 997.22854371 0.99722854 1.38557182 (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 CB-1 50,000,000.00 3.49000% 49,825,149.21 144,908.14 0.00 0.00 CB-2 88,861,000.00 3.59000% 88,476,541.95 264,692.32 0.00 0.00 CB-3 0.00 1.91000% 88,476,541.95 140,825.16 0.00 0.00 CB-4 0.00 2.01000% 49,825,149.21 83,457.12 0.00 0.00 CB-5 9,000,000.00 5.50000% 9,000,000.00 41,250.00 0.00 0.00 CB-6 87,760,000.00 3.49000% 87,453,094.13 254,342.75 0.00 0.00 CB-7 0.00 2.01000% 87,453,094.13 146,483.93 0.00 0.00 CB-8 20,000,000.00 5.50000% 20,000,000.00 91,666.67 0.00 0.00 CB-9 833,000.00 5.50000% 833,000.00 3,817.92 0.00 0.00 CB-10 12,487,000.00 5.50000% 12,544,232.08 57,494.40 0.00 0.00 CB-11 5,287,000.00 5.50000% 5,229,767.92 23,969.77 0.00 0.00 CB-12 4,334,000.00 5.50000% 4,315,248.90 19,778.22 0.00 0.00 CB-13 12,410,000.00 5.50000% 12,410,000.00 56,879.17 0.00 0.00 CB-R 100.00 5.50000% 0.00 0.00 0.00 0.00 CB-IO 0.00 5.50000% 16,533,351.81 75,777.86 0.00 0.00 2-A-1 20,082,000.00 5.00000% 20,005,578.20 83,356.58 0.00 0.00 3-A-1 29,801,000.00 5.50000% 29,693,818.42 136,096.67 0.00 0.00 A-PO 1,249,480.28 0.00000% 1,246,965.80 0.00 0.00 0.00 15-IO 0.00 5.50000% 974,693.65 4,467.35 0.00 0.00 B-1 6,415,000.00 5.47043% 6,406,105.44 29,203.48 0.00 0.00 B-2 2,673,000.00 5.47043% 2,669,293.82 12,168.49 0.00 0.00 B-3 1,960,000.00 5.47043% 1,957,282.41 8,922.65 0.00 0.00 B-4 1,247,000.00 5.47043% 1,245,271.00 5,676.81 0.00 0.00 B-5 713,000.00 5.47043% 712,011.41 3,245.84 0.00 0.00 B-6 1,247,420.00 5.47043% 1,245,691.22 5,678.73 0.00 0.00 Totals 356,360,000.28 1,694,160.03 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 CB-1 0.00 0.00 144,908.14 0.00 49,341,647.69 CB-2 0.00 0.00 264,692.32 0.00 87,413,429.51 CB-3 0.00 0.00 140,825.16 0.00 87,413,429.51 CB-4 0.00 0.00 83,457.12 0.00 49,341,647.69 CB-5 0.00 0.00 41,250.00 0.00 9,000,000.00 CB-6 0.00 0.00 254,342.75 0.00 86,604,430.81 CB-7 0.00 0.00 146,483.93 0.00 86,604,430.80 CB-8 0.00 0.00 91,666.67 0.00 20,000,000.00 CB-9 0.00 0.00 3,817.92 0.00 833,000.00 CB-10 0.00 0.00 57,494.40 0.00 12,601,726.48 CB-11 0.00 0.00 23,969.77 0.00 5,172,273.52 CB-12 0.00 0.00 19,778.22 0.00 4,263,397.93 CB-13 0.00 0.00 56,879.17 0.00 12,410,000.00 CB-R 0.00 0.00 0.00 0.00 0.00 CB-IO 0.00 0.00 75,777.86 0.00 16,352,355.27 2-A-1 0.00 0.00 83,356.58 0.00 19,924,482.29 3-A-1 0.00 0.00 136,096.67 0.00 29,582,860.03 A-PO 0.00 0.00 0.00 0.00 1,240,906.88 15-IO 0.00 0.00 4,467.35 0.00 971,106.53 B-1 0.00 0.00 29,203.48 0.00 6,397,216.46 B-2 0.00 0.00 12,168.49 0.00 2,665,589.96 B-3 0.00 0.00 8,922.65 0.00 1,954,566.53 B-4 0.00 0.00 5,676.81 0.00 1,243,543.09 B-5 0.00 0.00 3,245.84 0.00 711,023.44 B-6 0.00 0.00 5,678.73 0.00 1,243,962.83 Totals 0.00 0.00 1,694,160.03 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 CB-1 50,000,000.00 3.49000% 996.50298420 2.89816280 0.00000000 0.00000000 CB-2 88,861,000.00 3.59000% 995.67348949 2.97872317 0.00000000 0.00000000 CB-3 0.00 1.91000% 995.67348949 1.58478027 0.00000000 0.00000000 CB-4 0.00 2.01000% 996.50298420 1.66914240 0.00000000 0.00000000 CB-5 9,000,000.00 5.50000% 1000.00000000 4.58333333 0.00000000 0.00000000 CB-6 87,760,000.00 3.49000% 996.50289574 2.89816260 0.00000000 0.00000000 CB-7 0.00 2.01000% 996.50289574 1.66914232 0.00000000 0.00000000 CB-8 20,000,000.00 5.50000% 1000.00000000 4.58333350 0.00000000 0.00000000 CB-9 833,000.00 5.50000% 1000.00000000 4.58333733 0.00000000 0.00000000 CB-10 12,487,000.00 5.50000% 1004.58333307 4.60434051 0.00000000 0.00000000 CB-11 5,287,000.00 5.50000% 989.17494231 4.53371855 0.00000000 0.00000000 CB-12 4,334,000.00 5.50000% 995.67348869 4.56350254 0.00000000 0.00000000 CB-13 12,410,000.00 5.50000% 1000.00000000 4.58333360 0.00000000 0.00000000 CB-R 100.00 5.50000% 0.00000000 0.00000000 0.00000000 0.00000000 CB-IO 0.00 5.50000% 995.52226108 4.56281022 0.00000000 0.00000000 2-A-1 20,082,000.00 5.00000% 996.19451250 4.15081068 0.00000000 0.00000000 3-A-1 29,801,000.00 5.50000% 996.40342338 4.56684910 0.00000000 0.00000000 A-PO 1,249,480.28 0.00000% 997.98757928 0.00000000 0.00000000 0.00000000 15-IO 0.00 5.50000% 996.32115192 4.56647614 0.00000000 0.00000000 B-1 6,415,000.00 5.47043% 998.61347467 4.55237412 0.00000000 0.00000000 B-2 2,673,000.00 5.47043% 998.61347550 4.55237187 0.00000000 0.00000000 B-3 1,960,000.00 5.47043% 998.61347449 4.55237245 0.00000000 0.00000000 B-4 1,247,000.00 5.47043% 998.61347233 4.55237370 0.00000000 0.00000000 B-5 713,000.00 5.47043% 998.61347826 4.55237027 0.00000000 0.00000000 B-6 1,247,420.00 5.47043% 998.61411553 4.55238011 0.00000000 0.00000000 (5) All classes are per 1,000 dollar 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 CB-1 0.00000000 0.00000000 2.89816280 0.00000000 986.83295380 CB-2 0.00000000 0.00000000 2.97872317 0.00000000 983.70972091 CB-3 0.00000000 0.00000000 1.58478027 0.00000000 983.70972091 CB-4 0.00000000 0.00000000 1.66914240 0.00000000 986.83295380 CB-5 0.00000000 0.00000000 4.58333333 0.00000000 1000.00000000 CB-6 0.00000000 0.00000000 2.89816260 0.00000000 986.83262090 CB-7 0.00000000 0.00000000 1.66914232 0.00000000 986.83262078 CB-8 0.00000000 0.00000000 4.58333350 0.00000000 1000.00000000 CB-9 0.00000000 0.00000000 4.58333733 0.00000000 1000.00000000 CB-10 0.00000000 0.00000000 4.60434051 0.00000000 1009.18767358 CB-11 0.00000000 0.00000000 4.53371855 0.00000000 978.30026858 CB-12 0.00000000 0.00000000 4.56350254 0.00000000 983.70972081 CB-13 0.00000000 0.00000000 4.58333360 0.00000000 1000.00000000 CB-R 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 CB-IO 0.00000000 0.00000000 4.56281022 0.00000000 984.62392136 2-A-1 0.00000000 0.00000000 4.15081068 0.00000000 992.15627378 3-A-1 0.00000000 0.00000000 4.56684910 0.00000000 992.68011241 A-PO 0.00000000 0.00000000 0.00000000 0.00000000 993.13842712 15-IO 0.00000000 0.00000000 4.56647614 0.00000000 992.65443722 B-1 0.00000000 0.00000000 4.55237412 0.00000000 997.22781917 B-2 0.00000000 0.00000000 4.55237187 0.00000000 997.22781893 B-3 0.00000000 0.00000000 4.55237245 0.00000000 997.22782143 B-4 0.00000000 0.00000000 4.55237370 0.00000000 997.22781877 B-5 0.00000000 0.00000000 4.55237027 0.00000000 997.22782609 B-6 0.00000000 0.00000000 4.55238011 0.00000000 997.22854371 (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 Component Statement Component Beginning Ending Beginning Ending Ending Pass-Through Notional Notional Component Component Component Class Rate Balance Balance Balance Balance Percentage 1-A-PO 0.00000% 0.00 0.00 837,864.59 833,454.54 99.35659549% 2-A-PO 0.00000% 0.00 0.00 187,854.47 187,030.90 99.17543681% 3-A-PO 0.00000% 0.00 0.00 221,246.74 220,421.44 99.26987891% 2-15-IO 5.50000% 483,768.64 481,960.89 0.00 0.00 99.24909905% 3-15-IO 5.50000% 490,925.01 489,145.64 0.00 0.00 99.28155359%

CERTIFICATEHOLDER ACCOUNT STATEMENT CERTIFICATE ACCOUNT Beginning Balance 0.00 Deposits Payments of Interest and Principal 4,434,234.69 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 4,434,234.69 Withdrawals Reimbursement for Servicer Advances 0.00 Payment of Service Fee 75,080.20 Payment of Interest and Principal 4,359,154.49 Total Withdrawals (Pool Distribution Amount) 4,434,234.69 Ending Balance 0.00

PREPAYMENT/CURTAILMENT INTEREST SHORTFALL Total Prepayment/Curtailment Interest Shortfall 0.00 Servicing Fee Support 0.00 Non-Supported Prepayment/Curtailment Interest Shortfall 0.00

SERVICING FEES Gross Servicing Fee 74,014.39 Wells Fargo Bank, N.A. 1,065.81 Supported Prepayment/Curtailment Interest Shortfall 0.00 Net Servicing Fee 75,080.20

OTHER ACCOUNTS Beginning Current Current Ending Account Type Balance Withdrawals Deposits Balance Class CB-1 Reserve Fund 0.00 0.00 0.00 0.00 Class CB-2 Reserve Fund 0.00 0.00 0.00 0.00 Class CB-6 Reserve Fund 0.00 0.00 0.00 0.00

LOAN STATUS STRATIFICATION/CREDIT ENHANCEMENT STATEMENT 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 17 0 0 0 17 3,266,383.14 0.00 0.00 0.00 3,266,383.14 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 17 0 0 0 17 3,266,383.14 0.00 0.00 0.00 3,266,383.14 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 0.706861% 0.000000% 0.000000% 0.000000% 0.706861% 0.925341% 0.000000% 0.000000% 0.000000% 0.925341% 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 0.706861% 0.000000% 0.000000% 0.000000% 0.706861% 0.925341% 0.000000% 0.000000% 0.000000% 0.925341%

DELINQUENT BANKRUPTCY FORECLOSURE REO Total 1 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 14 0 0 0 14 2,323,433.14 0.00 0.00 0.00 2,323,433.14 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 14 0 0 0 14 2,323,433.14 0.00 0.00 0.00 2,323,433.14 0-29 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 30 Days 0.691700% 0.000000% 0.000000% 0.000000% 0.691700% 0.772308% 0.000000% 0.000000% 0.000000% 0.772308% 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 0.691700% 0.000000% 0.000000% 0.000000% 0.691700% 0.772308% 0.000000% 0.000000% 0.000000% 0.772308% DELINQUENT BANKRUPTCY FORECLOSURE REO Total 2 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 2 0 0 0 2 802,950.00 0.00 0.00 0.00 802,950.00 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 2 0 0 0 2 802,950.00 0.00 0.00 0.00 802,950.00 0-29 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 30 Days 1.801802% 0.000000% 0.000000% 0.000000% 1.801802% 3.821894% 0.000000% 0.000000% 0.000000% 3.821894% 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 1.801802% 0.000000% 0.000000% 0.000000% 1.801802% 3.821894% 0.000000% 0.000000% 0.000000% 3.821894% DELINQUENT BANKRUPTCY FORECLOSURE REO Total 3 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 1 0 0 0 1 140,000.00 0.00 0.00 0.00 140,000.00 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 1 0 0 0 1 140,000.00 0.00 0.00 0.00 140,000.00 0-29 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 30 Days 0.370370% 0.000000% 0.000000% 0.000000% 0.370370% 0.449578% 0.000000% 0.000000% 0.000000% 0.449578% 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 0.370370% 0.000000% 0.000000% 0.000000% 0.370370% 0.449578% 0.000000% 0.000000% 0.000000% 0.449578%

OTHER INFORMATION Current Period Class A Insufficient Funds 0.00 Principal Balance of Contaminated Properties 0.00 Periodic Advance 0.00

COLLATERAL STATEMENT Collateral Description Mixed Fixed Weighted Average Gross Coupon 5.976000% Weighted Average Pass-Through Rate 5.722401% Weighted Average Maturity(Stepdown Calculation) 331 Beginning Scheduled Collateral Loan Count 2,416 Number Of Loans Paid In Full 11 Ending Scheduled Collateral Loan Count 2,405 Beginning Scheduled Collateral Balance 355,269,051.91 Ending Scheduled Collateral Balance 352,604,057.34 Ending Actual Collateral Balance at 31-May-2005 352,992,450.27 Monthly P&I Constant 2,262,524.82 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 4,262,387.66 Class AP Deferred Amount 0.00 Scheduled Principal 493,284.84 Unscheduled Principal 2,171,709.73

Miscellaneous Reporting Senior % 95.642001%

Group Level Collateral Statement Group 1 2 3 Collateral Description Fixed 15 & 30 Year Fixed 15 & 30 Year Fixed 15 & 30 Year Weighted Average Coupon Rate 6.038434 5.335437 5.801192 Weighted Average Net Rate 5.788433 5.085437 5.551194 Weighted Average Maturity 357 178 178 Beginning Loan Count 2,035 111 270 Loans Paid In Full 11 0 0 Ending Loan Count 2,024 111 270 Beginning Scheduled Balance 303,071,614.21 21,035,236.86 31,162,200.84 Ending Scheduled Balance 300,607,845.78 20,950,212.78 31,045,998.78 Record Date 05/31/2005 05/31/2005 05/31/2005 Principal And Interest Constant 1,830,332.09 171,127.29 261,065.44 Scheduled Principal 305,267.20 77,600.47 110,417.17 Unscheduled Principal 2,158,501.23 7,423.61 5,784.89 Scheduled Interest 1,525,064.89 93,526.82 150,648.27 Servicing Fees 63,139.92 4,382.34 6,492.13 Master Servicing Fees 0.00 0.00 0.00 Trustee Fee 909.21 63.11 93.49 FRY Amount 0.00 0.00 0.00 Special Hazard Fee 0.00 0.00 0.00 Other Fee 0.00 0.00 0.00 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 1,461,015.76 89,081.37 144,062.65 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 5.784833 5.081839 5.547598

Group Level Collateral Statement Group Total Collateral Description Mixed Fixed Weighted Average Coupon Rate 5.976000 Weighted Average Net Rate 5.726000 Weighted Average Maturity 331 Beginning Loan Count 2,416 Loans Paid In Full 11 Ending Loan Count 2,405 Beginning Scheduled Balance 355,269,051.91 Ending scheduled Balance 352,604,057.34 Record Date 05/31/2005 Principal And Interest Constant 2,262,524.82 Scheduled Principal 493,284.84 Unscheduled Principal 2,171,709.73 Scheduled Interest 1,769,239.98 Servicing Fees 74,014.39 Master Servicing Fees 0.00 Trustee Fee 1,065.81 FRY Amount 0.00 Special Hazard Fee 0.00 Other Fee 0.00 Pool Insurance Fee 0.00 Spread 1 0.00 Spread 2 0.00 Spread 3 0.00 Net Interest 1,694,159.78 Realized Loss Amount 0.00 Cumulative Realized Loss 0.00 Percentage of Cumulative Losses 0.0000 Prepayment Penalties 0.00 Special Servicing Fee 0.00 Pass-Through Rate 5.722401

Miscellaneous Reporting Group 1 CPR 8.227508% Subordinate % 4.018980% Subordinate Prepayment % 0.000000% Senior Prepayment % 100.000000% Senior % 95.981020% Group 2 CPR 0.424237% Subordinate % 4.037936% Subordinate Prepayment % 0.000000% Senior Prepayment % 100.000000% Senior % 95.962064% Group 3 CPR 0.223329% Subordinate % 4.030696% Subordinate Prepayment % 0.000000% Senior Prepayment % 100.000000% Senior % 95.969304%

Filing Compare · Banc of America Alternative Loan Trust Mortgage Pass-Through Certificates Series 2005-4