UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, DC  20549

                              Form 13F Cover Page

Report for the Calendar Year or Quarter Ended December 31, 2009

Check here if Amendment [ X ]; Amendment Number:  ___1____

This Amendment:

[  ]  is a restatement.
[x]  adds new holdings entries.

Institutional Investment Manager Filing this Report:

Name:  Federated Investors, Inc.

Address:  Federated Investors Tower
                1001 Liberty Avenue
                Pittsburgh, PA  15222-3779

Form 13F File Number:  28-04375

       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:  David J. Brennen
Title:  Compliance Officer
Phone:  (412) 288-7052

Signature, Place, and Date of Signing:
/s/David J. Brennen Pittsburgh, PA             February 19, 2010
This amendment is being filed due to an error in the share amount of two
issuers.



COVER PAGE ADDENDUM FOR FORM 13F

Federated Investors, Inc. ("Investors") is
affiliated with the institutional investment
managers listed on the summary page of this Form 13F
in the manner described below.  By virtue of Rule
13F-1(b) under the Securities Exchange Act of 1934,
Investors is deemed to share investment discretion
over all investments reported herein.  This filing
does not constitute an admission that such
investment discretion does in fact exist, but is
made solely to comply with applicable law.

The information set forth below is numbered to
correspond with the names of the other parties with
respect to which this schedule is filed as listed at
the bottom of the cover page hereof:

1.  Federated Investment Counseling ("FIC") is an
Investment Adviser to Federated International Funds,
PLC and certain private investment accounts,
consisting primarily of pension and retirement
plans.  FIC is a wholly-owned subsidiary of
Investors.  Investors exercises investment
discretion over certain investments as reported by
FIC.  FIC exercises investment discretion over the
investments identified with the number "1" under
Item 7 in the attached tables.  This filing is made
on behalf of FIC with respect to all investments
over which it exercises investment discretion.

2.  Federated Investment Management Company ("FIM")
is the Investment Adviser to certain Federated
Funds.  FIM is a wholly-owned subsidiary of
Investors.  Subject to guidelines established by the
Boards of Trustees or Directors of the
aforementioned Funds, FIM exercises investment
discretion over the investments identified with the
number "2" under Item 7 in the attached tables.
This filing is made on behalf of FIM with respect to
all investments over which it exercises investment
discretion.

4.  Passport Research Ltd. ("PR") is the Investment
Adviser to Edward D. Jones Money Market Fund.  PR is
50.5% owned subsidiary of FIM.  FIM is a wholly-
owned subsidiary of Investors.  Subject to
guidelines established by the Boards of Trustees of
the aforementioned investment company, PR exercises
investment discretion over the investments
identified with the number "4" under Item 7 in the
attached tables.  This filing is made on behalf of
PR with respect to all investments over which it
exercises investment discretion.

8.  Federated Advisory Services Company ("FASC") is
an Investment Adviser that provides investment
advice and other services to related advisers.

9.  Federated Equity Management Company of
Pennsylvania ("FEMCOPA") is the Investment Adviser
to certain Federated Funds.  FEMCOPA is a wholly-
owned subsidiary of Investors.  Subject to
guidelines established by the Boards of Trustees or
Directors of the aforementioned Funds, FEMCOPA
exercises investment discretion over the investments
identified with the number "9" under Item 7 in the
attached tables.  This filing is made on behalf of
FEMCOPA with respect to all investments over which
it exercise investment discretion.

21.  Federated Global Investment Management Corp.
("Global") is the Investment Adviser to certain
international Federated Funds and certain
international private investment accounts.  Global
is a wholly-owned subsidiary of Investors.  Subject
to guidelines established by the Board of Trustees
or Directors of the aforementioned Funds, Global
exercises investment discretion over the investments
identified with the number "21" under Item 7 in the
attached tables.  This filing is made on behalf of
Global with respect to all investments over which it
exercises investment discretion.

22.  Federated MDT Advisers ("MDT") is the
Investment Adviser to certain Federated Funds.  MDT
is a wholly-owned subsidiary of Investors.  Subject
to guidelines established by the Boards of Trustees
or Directors of the aforementioned Funds, MDT
exercises investment discretion over the investments
identified with the number "22" under Item 7 in the
attached tables.  This filing is made on behalf of
MDT with respect to all investments over which it
exercise investment discretion.

Report Type

[ X] 13F HOLDING REPORT.

[  ]  13F NOTICE.

[  ]  13F COMBINATION REPORT.

Form 13 F Summary Page

Number of Other Included Managers:   7

Form 13F Information Table Entry Total:  2
Form 13F Information Table Value Total:  $7,614.13

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.

No.       13F File Number        Name

09        28-10900         Federated Equity Management Company of Pennsylvania










     Column 1       Column  Column 3  Column 4 Column 5                         Column 6           Column 7       Column 8
                       2
                                                                                             
  Name of Issuer     Title    CUSIP    Value   Shrs or  SH/ PRN Put/ Call Investment Discretion Other Managers  Sole   Shared None
                      of              (x$1000) Prn Amt
                     Class

ALEXZA              COM     015384100 1,034.48  431,034 SH                DEFINED                     09       431,034      0    0
PHARMACEUTICALS INC
CHINDEX             COM     169467107 6,579.65  465,651 SH                DEFINED                     09       465,651      0    0
INTERNATIONAL INC