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Mailing Address 111 HUNTINGTON AVENUE 21ST FLOOR BOSTON MA 02199
Business Address 111 HUNTINGTON AVENUE 21ST FLOOR BOSTON MA 02199 18006372929
MFS SERIES TRUST IX CIK#: 0000063075 (see all company filings)

State location: MA | State of Inc.: MA | Fiscal Year End: 0430
formerly: MFS FIXED INCOME TRUST (filings through 1995-02-01)
formerly: MFS FIXED INCOME TRUST/ (filings through 1995-06-29)
formerly: MFS SERIES TRUST IX /MA/ (filings through 2014-01-28)
Class/Contract: C000034443 Class W Shares 
Ticker Symbol:   MRBWX
(List all Funds and Classes/Contracts for MFS SERIES TRUST IX)

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Items 1 - 40  0000063075 Filings RSS Feed
Filings Format Description Filing Date File/Film Number
NPORT-P  Documents Monthly Portfolio Investments Report on Form N-PORT (Public)
Acc-no: 0001752724-24-067318 (40 Act)  Size: 2 MB
2024-03-26 811-02464
24782090
497  Documents Definitive materials
Acc-no: 0000912938-24-000279 (33 Act)  Size: 137 KB
2024-03-15 002-50409
24752700
N-CEN  Documents Annual Report for Registered Investment Companies
Acc-no: 0001752724-24-001433 (40 Act)  Size: 111 KB
2024-01-11 811-02464
24528957
497  Documents Definitive materials
Acc-no: 0000912938-23-000520 (33 Act)  Size: 137 KB
2023-12-29 002-50409
231524548
NPORT-P  Documents Monthly Portfolio Investments Report on Form N-PORT (Public)
Acc-no: 0001752724-23-293487 (40 Act)  Size: 1 MB
2023-12-27 811-02464
231516804
N-CSRS  Documents Certified Shareholder Report, Semi-Annual
Acc-no: 0001683863-23-008513 (40 Act)  Size: 7 MB
2023-12-21 811-02464
231504650
497  Documents Definitive materials
Acc-no: 0000912938-23-000510 (33 Act)  Size: 290 KB
2023-12-06 002-50409
231468550
497  Documents Definitive materials
Acc-no: 0000912938-23-000502 (33 Act)  Size: 685 KB
2023-11-28 002-50409
231442049
497  Documents Definitive materials
Acc-no: 0000912938-23-000470 (33 Act)  Size: 303 KB
2023-10-31 002-50409
231362408
497  Documents Definitive materials
Acc-no: 0000912938-23-000419 (33 Act)  Size: 158 KB
2023-09-28 002-50409
231286293
NPORT-P  Documents Monthly Portfolio Investments Report on Form N-PORT (Public)
Acc-no: 0001752724-23-217522 (40 Act)  Size: 2 MB
2023-09-26 811-02464
231281254
497J  Documents Certification of no change in definitive materials
Acc-no: 0000912938-23-000405 (33 Act)  Size: 178 KB
2023-09-01 002-50409
231230793
N-PX  Documents Annual Report of proxy voting record of management investment companies
Acc-no: 0001193125-23-223243 (40 Act)  Size: 19 KB
2023-08-29 811-02464
231218755
485BPOS  Documents   Interactive Data Post-effective amendment [Rule 485(b)]
Acc-no: 0001104659-23-095168 (40 Act)  Size: 12 MB
2023-08-25 811-02464
231204852
485BPOS  Documents   Interactive Data Post-effective amendment [Rule 485(b)]
Acc-no: 0001104659-23-095168 (33 Act)  Size: 12 MB
2023-08-25 002-50409
231204851
497K  Documents Summary Prospectus for certain open-end management investment companies filed pursuant to Securities Act Rule 497(K)
Acc-no: 0001104659-23-095181 (33 Act)  Size: 222 KB
2023-08-25 002-50409
231205026
24F-2NT  Documents Rule 24F-2 notice
Acc-no: 0001683863-23-005484 (33 Act)  Size: 15 KB
2023-07-18 002-50409
231093256
N-CEN  Documents Annual Report for Registered Investment Companies
Acc-no: 0001752724-23-151400 (40 Act)  Size: 275 KB
2023-07-12 811-02464
231083543
NPORT-P  Documents Monthly Portfolio Investments Report on Form N-PORT (Public)
Acc-no: 0001752724-23-143678 (40 Act)  Size: 1 MB
2023-06-26 811-02464
231041697
N-CSR  Documents Certified Shareholder Report
Acc-no: 0001683863-23-005162 (40 Act)  Size: 8 MB
2023-06-22 811-02464
231033199
497  Documents Definitive materials
Acc-no: 0000912938-23-000352 (33 Act)  Size: 64 KB
2023-05-31 002-50409
23979146
497  Documents Definitive materials
Acc-no: 0000912938-23-000308 (33 Act)  Size: 107 KB
2023-03-30 002-50409
23777329
497  Documents Definitive materials
Acc-no: 0000912938-23-000304 (33 Act)  Size: 97 KB
2023-03-30 002-50409
23777301
NPORT-P  Documents Monthly Portfolio Investments Report on Form N-PORT (Public)
Acc-no: 0001752724-23-068529 (40 Act)  Size: 2 MB
2023-03-28 811-02464
23766984
497  Documents Definitive materials
Acc-no: 0000912938-23-000256 (33 Act)  Size: 76 KB
2023-02-28 002-50409
23678817
497  Documents Definitive materials
Acc-no: 0000912938-22-000497 (33 Act)  Size: 260 KB
2022-12-29 002-50409
221496427
497  Documents Definitive materials
Acc-no: 0000912938-22-000499 (33 Act)  Size: 110 KB
2022-12-29 002-50409
221496704
NPORT-P  Documents Monthly Portfolio Investments Report on Form N-PORT (Public)
Acc-no: 0001752724-22-291230 (40 Act)  Size: 1 MB
2022-12-27 811-02464
221487455
N-CSRS  Documents Certified Shareholder Report, Semi-Annual
Acc-no: 0001683863-22-007962 (40 Act)  Size: 8 MB
2022-12-22 811-02464
221482437
NPORT-P  Documents Monthly Portfolio Investments Report on Form N-PORT (Public)
Acc-no: 0001752724-22-215263 (40 Act)  Size: 1 MB
2022-09-26 811-02464
221264002
497J  Documents Certification of no change in definitive materials
Acc-no: 0000912938-22-000432 (33 Act)  Size: 87 KB
2022-08-31 002-50409
221216360
N-PX  Documents Annual Report of proxy voting record of management investment companies
Acc-no: 0001193125-22-232522 (40 Act)  Size: 18 KB
2022-08-29 811-02464
221210253
497K  Documents Summary Prospectus for certain open-end management investment companies filed pursuant to Securities Act Rule 497(K)
Acc-no: 0001104659-22-094289 (33 Act)  Size: 210 KB
2022-08-25 002-50409
221194330
485BPOS  Documents   Interactive Data Post-effective amendment [Rule 485(b)]
Acc-no: 0001104659-22-094282 (33 Act)  Size: 12 MB
2022-08-25 002-50409
221194224
485BPOS  Documents   Interactive Data Post-effective amendment [Rule 485(b)]
Acc-no: 0001104659-22-094282 (40 Act)  Size: 12 MB
2022-08-25 811-02464
221194225
497  Documents Definitive materials
Acc-no: 0000912938-22-000400 (33 Act)  Size: 415 KB
2022-07-29 002-50409
221117661
24F-2NT  Documents Rule 24F-2 notice
Acc-no: 0001683863-22-005295 (33 Act)  Size: 15 KB
2022-07-19 002-50409
221090418
N-CEN  Documents Annual Report for Registered Investment Companies
Acc-no: 0001752724-22-155111 (40 Act)  Size: 275 KB
2022-07-11 811-02464
221076655
N-CSR  Documents Certified Shareholder Report
Acc-no: 0001193125-22-183650 (40 Act)  Size: 10 MB
2022-06-28 811-02464
221048318
NPORT-P  Documents Monthly Portfolio Investments Report on Form N-PORT (Public)
Acc-no: 0001752724-22-146187 (40 Act)  Size: 1 MB
2022-06-24 811-02464
221038446