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: 12-31-2022
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: MASON STREET ADVISORS, LLC
Address: 720 EAST WISCONSIN AVE
MILWAUKEE, WI  53202
Form 13F File Number: 028-10206
CRD Number (if applicable): 000114085
SEC File Number (if applicable): 801-60721

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: DEREK PETERSEN
Title: Investment Compliance Senior Director
Phone: 414 665-7242
Signature, Place, and Date of Signing:
/s/DEREK PETERSEN MILWAUKEEWI 02-14-2023
[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.]
Name Form 13F File No. CRD No. (if applicable) SEC File No. (if applicable) CIK
AMERICAN CENTURY INVESTMENT MANAGEMENT INC 028-01091 000105778 801-8174 0000052388
BLACKROCK ADVISORS LLC 028-04295 000106614 801-47710 0001086364
FEDERATED INVESTMENT MANAGEMENT CO 028-04377 000105138 801-34612 0001086433
FIAM LLC 028-12282 000133196 801-63658 0001385495
FIDUCIARY MANAGEMENT INC /WI/ 028-01526 000109149 801-15164 0000764532
LOOMIS SAYLES & CO L P 028-00398 000105377 801-170 0000312348
MACQUARIE INVESTMENT MANAGEMENT BUSINESS TRUST 028-05267     0000727770
MASSACHUSETTS FINANCIAL SERVICES CO /MA/ 028-04968 000110045 801-17352 0000912938
PACIFIC INVESTMENT MANAGEMENT CO LLC 028-10952 000104559 801-48187 0001163368
T. Rowe Price Investment Management, Inc. 028-22690 000314590 801-121434 0001897612
DODGE & COX 028-00400 000104596 801-1895 0000200217
WELLINGTON MANAGEMENT GROUP LLP 028-04557 000106595 801-15908 0000902219
ALLSPRING GLOBAL INVESTMENTS, LLC 028-04413 000104973 801-21122 0001075869
Northern Trust Investments, Inc 028-10487 000105780 801-33358 0001256909
abrdn Investments Ltd 028-14936     0001544935
Form 13F Summary Page
Report Summary:
Number of Other Included Managers: 0
Form 13F Information Table Entry Total: 9
Form 13F Information Table Value Total: 402,144,037
(round to nearest dollar)
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.]
NONE