X0201 N-CEN LIVE 0000911637 XXXXXXXX 811-07992 false false false N-1A true MFS SERIES TRUST XI 811-07992 0000911637 549300O3TPADV1WWUX67 111 HUNTINGTON AVENUE 24TH FLOOR BOSTON 02199 US-MA US 617-954-5000 Charles River Development 700 District Avenue Burlington 01803 781-238-0099 Investment related records MFS Fund Distributors, Inc. 111 Huntington Avenue Boston 02199 617-954-5000 Principal Underwriter Record TerraNua Limited (New York, NY, US, Branch) 535 5th Avenue New York 10017 866-951-2280 Personal Trading System Ropes & Gray LLP 800 Boylston Street Boston 02199-3600 617-951-7000 Counsel Record MFS Service Center, Inc 100 Hancock Street Quincy 02171 617-954-5000 Transfer Agency Record The Depository Trust Company 55 Water Street New York 10041 212-855-1000 DTC Iron Mountain, Inc. 150 SE Second Street Miami 33131 800-899-4766 Storage Vendor Institutional Shareholder Services Inc. 702 King Farm Boulevard Rockville 20850 301-556-0500 Proxy Voting Administrator Autonomy Americas LLC 90 Park Avenue New York 10016 44-122-344-8000 Storage Vendor Massachusetts Financial Services Company 111 Huntington Avenue Boston 02199-7632 617-954-5000 Investment Adviser Record State Street Bank and Trust Company 1 Lincoln Street Boston 02111 617-786-3000 Custody and Accounting Records DST Systems, Inc. 333 West 11th Street Kansas City 64105-1628 816-435-8655 Technology Vendor N N N-1A 2 Y Peter D. Jones 000000000 N Robert J. Manning 004646484 Y John P. Kavanaugh 000000000 N Laurie J. Thomsen 000000000 N James W. Kilman, Jr. 000000000 N Michael Hegarty 000000000 N Clarence Otis, Jr. 000000000 N Steven E. Buller 000000000 N Robin A. Stelmach 000000000 Y Maureen R. Goldfarb 000000000 N Maryanne L. Roepke 000000000 N John A. Caroselli 000000000 N Martin J. Wolin 004331075 111 Huntington Avenue Boston 02199 XXXXXX N N N N N N N MFS Fund Distributors, Inc. 8-45321 000031052 0000000000 Y N Ernst & Young LLP 42 00000000000000000000 Deloitte & Touche LLP 34 00000000000000000000 N N N N N N MFS Mid Cap Value Fund S000002499 BXHSCSBXYY1DOHP6E209 N 12 0 0 N/A N N Y N N State Street Bank and Trust Company 571474TGEMMWANRLN572 N N Revenue sharing split Cash collateral reinvestment fee 2387581.28000000 354550.00000000 Rule 22d-1 (17 CFR 270.22d-1) Rule 17a-7 (17 CFR 270.17a-7) Rule 12d1-1 (17 CFR 270.12d1-1) Rule 32a-4 (17 CFR 270.32a-4) Y Y N N Massachusetts Financial Services Company 801-17352 000110045 1G3OSH3GLGJ7X1JC5I61 N MFS Service Center, Inc 84-1316 0000000000 Y N N Refinitiv US Holdings Inc. 549300NF240HXJO7N016 N ICE Data Services, Inc. 13-3668779 Tax ID N N Citibank, National Association (Singapore, SG, Branch) E57ODZWZ7FF32TWEFA76 SG N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Skandinaviska Enskilda Banken AB (Helsinki, Uusimaa, FI, Branch) F3JS33DEI6XQ4ZBPTN86 FI N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Citibank, National Association (Sao Paulo, Sao Paulo, BR, Branch) E57ODZWZ7FF32TWEFA76 BR N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Deutsche Bank Aktiengesellschaft (Madrid, Madrid, ES, Branch) 7LTWFZYICNSX8D621K86 ES N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) BNP Paribas Securities Services (Athens, Attica, GR, Branch) 549300WCGB70D06XZS54 GR N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) State Street Bank and Trust Company (Edinburgh, GB, Branch) 571474TGEMMWANRLN572 GB N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) State Street Bank International GmbH ZMHGNT7ZPKZ3UFZ8EO46 DE N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Skandinaviska Enskilda Banken AB F3JS33DEI6XQ4ZBPTN86 SE N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Standard Chartered Bank (Hong Kong) Limited X5AV1MBDXGRPX5UGMX13 HK N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Deutsche Bank Aktiengesellschaft (Amsterdam, Noord Holland, NL, Branch) 7LTWFZYICNSX8D621K86 NL N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Deutsche Bank Aktiengesellschaft (Makati City, Metro Manila, PH, Branch) 7LTWFZYICNSX8D621K86 PH N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Euroclear Bank 549300OZ46BRLZ8Y6F65 BE N Y Foreign securities depository - rule 17f-7 (17 CFR 270.17f-7) The Hongkong and Shanghai Banking Corporation Limited (Sydney, NSW, AU, Branch) 2HI3YI5320L3RW6NJ957 AU N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) UniCredit Bank Austria AG D1HEB8VEU6D9M8ZUXG17 AT N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) UBS Switzerland AG 549300WOIFUSNYH0FL22 CH N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Standard Chartered Bank (Thai) Public Company Limited 549300O1LQYCQ7G1IM57 TH N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Skandinaviska Enskilda Banken AB (Oslo, Oslo, NO, Branch) F3JS33DEI6XQ4ZBPTN86 NO N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) State Street Trust Company Canada 549300L71XG2CTQ2V827 CA N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Bank Hapoalim B.M. B6ARUI4946ST4S7WOU88 IL N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Skandinaviska Enskilda Banken A/S F3JS33DEI6XQ4ZBPTN86 DK N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Banco Nacional de Mexico, S.A., Integrante del Grupo Financiero Banamex 2SFFM4FUIE05S37WFU55 MX N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Mizuho Bank, Ltd. (Minato ku, Tokyo, JP, Branch) RB0PEZSDGCO3JS6CEU02 JP N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) State Street Bank and Trust Company 571474TGEMMWANRLN572 N N Bank - section 17(f)(1) (15 U.S.C. 80a-17(f)(1)) The Standard Bank of South Africa Limited QFC8ZCW3Q5PRXU1XTM60 ZA N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Deutsche Bank Societa per Azioni 529900SS7ZWCX82U3W60 IT N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) The Hongkong and Shanghai Banking Corporation Limited (Auckland, Auckland, NZ, Branch) 2HI3YI5320L3RW6NJ957 NZ N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) N MFS Service Center, Inc 0000000000 Y N N Massachusetts Financial Services Company 1G3OSH3GLGJ7X1JC5I61 Y N N J.P. Morgan Securities LLC 8-35008 000000079 ZBUT11V806EZRVTWT807 161820.2 RBC Capital Markets, LLC 8-45411 000031194 549300LCO2FLSSVFFR64 104019.92 Merrill Lynch, Pierce, Fenner & Smith Incorporated 8-7221 000007691 8NAV47T0Y26Q87Y0QP81 81225.69 The Bank of New York Mellon 8-35255 000017454 HPFHU0OQ28E4N0NFVK49 117346.35 National Financial Services LLC 8-26740 000013041 549300JRHF1MHHWUAW04 120750.83 Barclays Capital Inc. 8-41342 000019714 AC28XWWI3WIBK2824319 241184.83 Morgan Stanley & Co. LLC 8-15869 000008209 9R7GPTSO7KV3UQJZQ078 425379.05 Goldman Sachs & Co. LLC 8-129 000000361 FOR8UP27PHTHYVLBNG30 180607.5 Jefferies LLC 8-15074 000002347 58PU97L1C0WSRCWADL48 217678.13 UBS Securities LLC 8-22651 000007654 T6FIZBDPKLYJKFCRVK44 69821.41 2079174.45 Jefferies LLC 8-15074 000002347 58PU97L1C0WSRCWADL48 5189504.45 J.P. Morgan Securities LLC 8-35008 000000079 ZBUT11V806EZRVTWT807 81809257.7 Merrill Lynch, Pierce, Fenner & Smith Incorporated 8-7221 000007691 8NAV47T0Y26Q87Y0QP81 24698361.5 Morgan Stanley & Co. LLC 8-15869 000008209 9R7GPTSO7KV3UQJZQ078 7509510 Goldman Sachs & Co. LLC 8-129 000000361 FOR8UP27PHTHYVLBNG30 17475028 136681661.65 Y 7983798581.27 Uncommitted 200000000 N Uncommitted 100000000 N Committed 1250000000 N N N N MFS Blended Research Core Equity Fund S000002500 SQK3NYUBFBKJ3GF1IO09 N 9 0 0 N/A N N Y N N State Street Bank and Trust Company 571474TGEMMWANRLN572 N N Revenue sharing split Cash collateral reinvestment fee N/A 41799.00000000 Rule 22d-1 (17 CFR 270.22d-1) Rule 32a-4 (17 CFR 270.32a-4) Rule 17a-7 (17 CFR 270.17a-7) Rule 12d1-1 (17 CFR 270.12d1-1) Y Y N N Massachusetts Financial Services Company 801-17352 000110045 1G3OSH3GLGJ7X1JC5I61 N MFS Service Center, Inc 84-1316 0000000000 Y N N Refinitiv US Holdings Inc. 549300NF240HXJO7N016 N ICE Data Services, Inc. 13-3668779 Tax ID N N State Street Bank and Trust Company 571474TGEMMWANRLN572 N N Bank - section 17(f)(1) (15 U.S.C. 80a-17(f)(1)) N MFS Service Center, Inc 0000000000 Y N N Massachusetts Financial Services Company 1G3OSH3GLGJ7X1JC5I61 Y N N Credit Suisse Securities (USA) LLC 8-422 000000816 1V8Y6QCX6YMJ2OELII46 2047.1 Deutsche Bank Securities Inc. 8-17822 000002525 9J6MBOOO7BECTDTUZW19 3210.78 Jefferies LLC 8-15074 000002347 58PU97L1C0WSRCWADL48 16457.38 Citigroup Global Markets Inc. 8-8177 000007059 MBNUM2BPBDO7JBLYG310 25512.71 RBC Capital Markets, LLC 8-45411 000031194 549300LCO2FLSSVFFR64 1998 Merrill Lynch, Pierce, Fenner & Smith Incorporated 8-7221 000007691 8NAV47T0Y26Q87Y0QP81 26311.21 Goldman Sachs & Co. LLC 8-129 000000361 FOR8UP27PHTHYVLBNG30 38367.14 J.P. Morgan Securities LLC 8-35008 000000079 ZBUT11V806EZRVTWT807 51258.77 UBS Securities LLC 8-22651 000007654 T6FIZBDPKLYJKFCRVK44 41247.96 Morgan Stanley & Co. LLC 8-15869 000008209 9R7GPTSO7KV3UQJZQ078 23383.24 232455.28 0 Y 1133068543.25 Uncommitted 100000000 Committed 1250000000 N Uncommitted 200000000 N N N N true