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

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OMB Number: 3235-0006
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Report for the Calendar Year or Quarter Ended: 09-30-2023
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: Park Avenue Institutional Advisers LLC
Address: 10 Hudson Yards
New York, NY  10001
Form 13F File Number: 028-16979
CRD Number (if applicable): 000175101
SEC File Number (if applicable): 801-81084

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: John H. Walter
Title: Senior Vice President, Chief Financial Officer
Phone: 212.598.1398
Signature, Place, and Date of Signing:
John Walker New YorkNY 10-31-2023
[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
Alliance Bernstein L.P.   000108477 801-56720  
Allspring Global Investments, LLC   000104973 801-21122  
Boston Partners Global Investors, Inc.   000124982 801-61786  
ClearBridge Investments, LLC   000137028 801-64710  
FIAM LLC   000133196 801-63658  
Janus Henderson Investors US LLC   000104652 801-13991  
J.P. Morgan Investment Management, Inc.   000107038 801-21011  
Lord, Abbett & Co. LLC   000110391 801-6997  
Massachusetts Financial Services Company   000110045 801-17352  
Putnam Investment Management, LLC   000106631 811-07513  
Schroder Investment Management North America Inc.   000299812 802-114915  
Wellington Management Company, LLP   000106595 801-15908  
Form 13F Summary Page
Report Summary:
Number of Other Included Managers: 1
Form 13F Information Table Entry Total: 5
Form 13F Information Table Value Total: 38,560,634
(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.]
No. Name Form 13F File No. CRD No. (if applicable) SEC File No. (if applicable) CIK
1 The Guardian Life Insurance Company of America 028-15487