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:12-31-2020
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:CHARLES SCHWAB INVESTMENT MANAGEMENT INC
Address:211 MAIN STREET
SAN FRANCISCO, CA  94105
Form 13F File Number:028-03128

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:Jonathan De St Paer
Title:President
Phone:617-960-5300
Signature, Place, and Date of Signing:
/s/ Jonathan De St PaerSan FranciscoCA02-11-2021
[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).)
X13F 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 NumberName
028-11918AMERICAN CENTURY COMPANIES INC
028-04395BAILLIE GIFFORD OVERSEAS LTD
028-12016BlackRock Investment Management, LLC
028-04871BLAIR WILLIAM & CO/IL
028-02013HARRIS ASSOCIATES L P
028-11450Mondrian Investment Partners LTD
Form 13F Summary Page
Report Summary:
Number of Other Included Managers:1
Form 13F Information Table Entry Total:3,417
Form 13F Information Table Value Total:252,047,608
(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 NumberName
1028-19636Charles Schwab Trust Co