Acadian Asset Management 13F-HR Quarterly holdings report by institutional manager

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: 12-31-2016

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:	ACADIAN ASSET MANAGEMENT LLC
Address:	260 FRANKLIN STREET
	BOSTON, MA  02110
Form 13F File Number:	028-05990

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:	Cynthia Kelly
Title:	VP, Senior Compliance Officer
Phone:	617-850-3500
Signature, Place, and Date of Signing:
Cynthia Kelly		Boston,  MA	01-18-2017
[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
	028-01190	RUSSELL FRANK CO/

Form 13F Summary Page
	Report Summary:
	Number of Other Included Managers:	2
	Form 13F Information Table Entry Total:	1,663
	Form 13F Information Table Value Total:	20,576,200
		(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	028-11931	OMAM INC.
	2	028-14511	American Beacon Advisors, Inc.