The Securities and Exchange Commission has not necessarily reviewed the information in this filing and has not determined if it is accurate and complete.
The reader should not assume that the information is accurate and complete.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 13F

FORM 13F COVER PAGE
OMB APPROVAL
OMB Number: 3235-0006
Estimated average burden
hours per response: 23.8
Report for the Calendar Year or Quarter Ended: 03-31-2018
Check here if Amendment    Amendment Number:
This Amendment (Check only one.):    is a restatement.
   adds new holdings entries.
Institutional Investment Manager Filing this Report:
Name: Russell Investments Group, Ltd.
Address: 1301 Second Avenue
18th Floor
Seattle, WA  98101
Form 13F File Number: 028-17598

The institutional investment manager filing this report and the person by whom it is signed hereby represent that the person signing the report is authorized to submit it, that all information contained herein is true, correct and complete, and that it is understood that all required items, statements, schedules, lists, and tables, are considered integral parts of this form.

Person Signing this Report on Behalf of Reporting Manager:
Name: Mark E. Swanson
Title: Global Head of Fund Services
Phone: 206-505-2086
Signature, Place, and Date of Signing:
/s/ Mark E. Swanson Seattle,  WA 05-11-2018
[Signature] [City, State] [Date]
Report Type (Check only one.):
X 13F HOLDINGS REPORT. (Check here if all holdings of this reporting manager are reported in this report.)
   13F NOTICE. (Check here if no holdings reported are in this report, and all holdings are reported by other reporting manager(s).)
   13F COMBINATION REPORT. (Check here if a portion of the holdings for this reporting manager are reported in this report and a portion are reported by other reporting manager(s).)
Form 13F Summary Page
Report Summary:
Number of Other Included Managers: 88
Form 13F Information Table Entry Total: 11,195
Form 13F Information Table Value Total: 59,087,213
(thousands)
List of Other Included Managers:
Provide a numbered list of the name(s) and Form 13F file number(s) of all institutional investment managers with respect to which this report is filed, other than the manager filing this report.
[If there are no entries in this list, state “NONE” and omit the column headings and list entries.]
No. Form 13F File Number Name
1 28-05990 Acadian Asset Management, LLC
2 28-06054 Advent International
3 28-05508 AJO, LP
4 28-16348 Alken AM Limited
5 28-03570 AllianceBernstein L.P.
6 28-13214 Ancora Advisors LLC
7 28-12990 Ares Management LLC
8 28-10005 Arrowstreet Capital, L.P.
9 28-13578 Artisan Partners Limited Partnership
10 28-06437 Atlantic Investment Management, Inc.
11 28-05615 Axiom International Investors LLC
12 28-04841 Baillie Gifford & Co
13 28-01006 Barrow, Hanley, Mewhinney & Strauss, LLC
14 28-11939 Beutel, Goodman & Company Ltd.
15 28-10210 BlackRock Asset Management North Asia Limited
16 28-12524 BlueBay Asset Management LLP
17 28-12484 Boston Partners Global Investors, Inc.
18 28-02204 Brandywine Global Investment Management, LLC
19 28-00096 Capital Guardian Trust Company
20 28-07760 Cardinal Capital Management, L.L.C.
21 28-11308 Ceredex Value Advisors LLC
22 28-12126 ClariVest Asset Management LLC
23 28-11197 Cohen & Steers Capital Management, Inc.
24 28-11563 Coho Partners, Ltd.
25 28-14423 Colonial First State Asset Management (Australia) Limited
26 28-14668 Copeland Capital Management, LLC
27 28-14599 Cove Street Capital, LLC
28 28-06136 DDJ Capital Management, LLC
29 28-05267 Delaware Investment Advisers, a Series of Delaware Management Business Trust
30 28-05268 DePrince, Race & Zollo, Inc.
31 28-04207 Driehaus Capital Management LLC
32 28-14070 EAM Investors, LLC
33 28-15834 Elk Creek Partners, LLC
34 28-10492 Falcon Point Capital, LLC
35 28-14036 Fiera Capital Corporation
36 28-11858 Foyston, Gordon & Payne Inc.
37 28-10957 Genesis Asset Managers, LLP
38 28-17876 GQG Partners LLC
39 28-04434 Harding Loevner LP
40 28-02013 Harris Associates L.P.
41 28-04321 Heitman Real Estate Securities LLC
42 28-10437 Hermes Investment Management Limited
43 28-13328 HS Management Partners, LLC
44 28-13410 Impax Asset Management Ltd
45 28-04211 INTECH Investment Management LLC
46 28-12634 Investec Asset Management Limited
47 28-16230 Jackson Square Partners, LLC
48 28-03059 Jacobs Levy Equity Management, Inc.
49 28-01343 Janus Capital Management LLC
50 28-13273 Jupiter Asset Management Limited
51 28-14858 Keywise Capital Management (HK) Limited
52 28-15794 Kopernik Global Investors LLC
53 28-06587 Lazard Asset Management LLC
54 28-12154 Levin Capital Strategies, L.P.
55 28-06580 LSV Asset Management
56 28-17487 Maple-Brown Abbott Limited
57 28-13243 Mar Vista Investment Partners, LLC
58 28-06748 Marsico Capital Management, LLC
59 28-04034 McKinley Capital Management, LLC
60 28-04968 MFS Institutional Advisors, Inc.
61 28-11450 Mondrian Investment Partners Limited
62 28-03432 Morgan Stanley Investment Management Inc.
63 28-11946 Numeric Investors LLC
64 28-14498 Nuveen Asset Management, LLC
65 28-05050 Oaktree Capital Management, L.P.
66 28-10234 OFI Global Institutional, Inc.
67 28-04383 Old Mutual Investment Group (South Africa) Pty. Ltd.
68 28-10952 Pacific Investment Management Company LLC
69 28-11296 PENN Capital Management Company, Inc.
70 28-10527 Perkins Investment Management, LLC
71 28-11073 Polaris Capital Management, LLC
72 28-03791 Pzena Investment Management, LLC
73 28-15708 QV Investors Inc.
74 28-16203 RiverPark Capital Management LLC
75 28-12635 Robeco Institutional Asset Management B.V.
76 28-04760 RREEF America L.L.C.
77 28-01096 Russell Investments Trust Company
78 28-14100 Sanders Capital, LLC
79 28-10613 Snow Capital Management L.P.
80 28-16279 Somerset Capital Management LLP
81 28-03426 Suffolk Capital Management, LLC
82 28-11507 Summit Creek Advisors, LLC
83 28-11076 Sustainable Growth Advisers, LP
84 28-02494 TCW Investment Management Company
85 28-14622 Timpani Capital Management LLC
86 28-04557 Wellington Management Company LLP
87 28-05046 Westwood Management Corp.
88 28-17022 William Blair Investment Management, LLC