SEC FORM 13F-HR/A

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
Expires: Oct 31, 2018
Estimated average burden
hours per response: 23.8

Report for the Calendar Year or Quarter Ended: 03-31-2018
Check here if Amendment X Amendment Number: 1
This Amendment (Check only one.):    is a restatement.
X adds new holdings entries.
Institutional Investment Manager Filing this Report:
Name: PRINCIPAL FINANCIAL GROUP INC
Address: 711 HIGH STREET
DES MOINES, IA  50392
Form 13F File Number: 028-10106

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: Jill Hittner
Title: Chief Financial Officer, Principal Global Investors, LLC
Phone: 515-248-2153
Signature, Place, and Date of Signing:
Jill Hittner Des MoinesIA 05-21-2018
[Signature] [City, State] [Date]
Report Type (Check only one.):
   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).)
X 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).)
List of Other Managers Reporting for this Manager:
[If there are no entries in this list, omit this section.]
Form 13F File Number Name
028-10449 Columbus Circle Investors
028-13785 Origin Asset Management, LLP
028-12454 Post Advisory Group, LLC
028-11300 Spectrum Asset Management, Inc
Form 13F Summary Page
Report Summary:
Number of Other Included Managers: 4
Form 13F Information Table Entry Total: 21
Form 13F Information Table Value Total: 616,911
(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
1 028-1549 Principal Global Investors, LLC
2 028-10400 Principal Real Estate Investors, LLC
3 028-793 Principal Life Insurance Co
4 028-10107 Principal Financial Services, Inc

SEC FORM 13-F Information Table

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 INFORMATION TABLE

OMB APPROVAL
OMB Number: 3235-0006
Expires: Oct 31, 2018
Estimated average burden
hours per response: 23.8

COLUMN 1 COLUMN 2 COLUMN 3 COLUMN 4 COLUMN 5 COLUMN 6 COLUMN 7 COLUMN 8
VALUE SHRS OR SH/ PUT/ INVESTMENT OTHER VOTING AUTHORITY
NAME OF ISSUER TITLE OF CLASS CUSIP (x$1000) PRN AMT PRN CALL DISCRETION MANAGER SOLE SHARED NONE
AMERICOLD RLTY TR COM 03064D108 3,287 172,251 SH   DFND 1 3 4 172,251 0 0
BANCO SANTANDER S A SPONSORED ADR B 05969B103 31,938 4,454,373 SH   DFND 1 3 4 4,438,442 0 15,931
BOOKING HLDGS INC COM 09857L108 233,885 112,424 SH   DFND 1 3 4 112,061 0 363
BOOKING HLDGS INC COM 09857L108 5,505 2,646 SH   DFND 1 4 2,646 0 0
ENCOMPASS HEALTH CORP COM 29261A100 75,768 1,325,296 SH   DFND 1 3 4 1,325,296 0 0
ENCOMPASS HEALTH CORP COM 29261A100 864 15,117 SH   DFND 1 4 15,117 0 0
GATES INDUSTRIAL CORPRATIN P ORD SHS G39108108 18,672 1,066,384 SH   DFND 1 3 4 1,066,384 0 0
GCI LIBERTY INC COM CLASS A 36164V305 167,635 3,171,308 SH   DFND 1 3 4 3,171,308 0 0
GCI LIBERTY INC COM CLASS A 36164V305 542 10,245 SH   DFND 1 4 10,245 0 0
HIGHPOINT RES CORP COM 43114K108 72 14,205 SH   DFND 1 4 14,205 0 0
HIGHPOINT RES CORP COM 43114K108 3,824 752,768 SH   DFND 1 3 4 752,768 0 0
NUTRIEN LTD COM 67077M108 5,866 124,129 SH   DFND 1 3 4 124,129 0 0
PLAYAGS INC COM 72814N104 12,030 517,173 SH   DFND 1 3 4 517,173 0 0
SYNEOS HEALTH INC CL A 87166B102 25,294 712,522 SH   DFND 1 3 4 712,522 0 0
SYNEOS HEALTH INC CL A 87166B102 203 5,718 SH   DFND 1 4 5,718 0 0
TTEC HLDGS INC COM 89854H102 3,665 119,396 SH   DFND 1 3 4 119,396 0 0
VICI PPTYS INC COM 925652109 12,970 707,945 SH   DFND 1 3 4 707,945 0 0
VICI PPTYS INC COM 925652109 1,139 62,170 SH   DFND 2 3 4 62,170 0 0
VICTORY CAP HLDGS INC COM CL A 92645B103 7,565 615,000 SH   DFND 1 3 4 615,000 0 0
WORLDPAY INC CL A 981558109 3,297 40,084 SH   DFND 1 4 40,084 0 0
ZSCALER INC COM 98980G102 2,890 102,940 SH   DFND 1 3 4 102,940 0 0