UNITED STATES

                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

                                  SCHEDULE 13D

                    Under the Securities Exchange Act of 1934


                          R.R. DONNELLEY & SONS COMPANY
--------------------------------------------------------------------------------
                                (Name of Issuer)

                     Common Stock, par value $1.25 per share
--------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                    257867101
--------------------------------------------------------------------------------
                                 (CUSIP Number)

                                            with a copy to:
Alexander J. Roepers                        Allen B. Levithan
Atlantic Investment Management, Inc.        LOWENSTEIN SANDLER PC
666 Fifth Avenue                            65 Livingston Avenue
New York, New York  10103                   Roseland, New Jersey  07068
(212) 484-5050                              (973) 597-2500
--------------------------------------------------------------------------------
                  (Name, Address and Telephone Number of Person
                Authorized to Receive Notices and Communications)

                                January 27, 2006
--------------------------------------------------------------------------------
             (Date of Event which Requires Filing of this Statement)


If the filing person has previously  filed a statement on Schedule l3G to report
the  acquisition  which is the subject of this  Schedule 13D, and is filing this
schedule because of Rule 13d-1(e), (f) or (g), check the following box [ ].

Note:  Schedules  filed in paper format shall include a signed original and five
copies of the  schedule,  including  all  exhibits.  See Rule l3d-7(b) for other
parties to whom copies are to be sent.

*The  remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for  any  subsequent   amendment   containing   information  which  would  alter
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934 ("Act") or otherwise  subject to the liabilities of that section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  see the
Notes).





     CUSIP NO.    257867101
--------------------------------------------------------------------------------
1)   Names of Reporting  Persons.  I.R.S.  Identification  Nos. of Above Persons
     (entities only):

                  Atlantic Investment Management, Inc.
--------------------------------------------------------------------------------
2)   Check the Appropriate Box if a Member of a Group (See Instructions):

            (a)              (b)        

--------------------------------------------------------------------------------
3)   SEC Use Only

--------------------------------------------------------------------------------
4)   Source of Funds (See Instructions):   AF, OO

--------------------------------------------------------------------------------
5)   Check if Disclosure of Legal Proceedings is Required Pursuant to Items 2(d)
     or 2(e):
                    Not Applicable
--------------------------------------------------------------------------------
6)   Citizenship or Place of Organization:   Delaware

--------------------------------------------------------------------------------
     Number of                       7)  Sole Voting Power:         10,811,400*
                                     -------------------------------------------
     Shares Beneficially             8)  Shared Voting Power:                0
                                     -------------------------------------------
     Owned by
     Each Reporting                  9)  Sole Dispositive Power:    10,811,400*
                                     -------------------------------------------
     Person With:                   10)  Shared Dispositive Power:           0
                                     -------------------------------------------
--------------------------------------------------------------------------------
11)  Aggregate Amount Beneficially Owned by Each Reporting Person:
                    10,811,400*
--------------------------------------------------------------------------------
12)  Check  if  the  Aggregate  Amount in  Row (11) Excludes Certain Shares (See
     Instructions):
                      Not Applicable
--------------------------------------------------------------------------------
13)  Percent of Class Represented by Amount in Row (11):      5.0%*
--------------------------------------------------------------------------------
14)  Type of Reporting Person (See Instructions):  IA

--------------------------------------------------------------------------------
*   Includes:  (i) 3,417,100 shares  (1.6%) of  the Issuer's  Common Stock,  par
value $1.25 per share ("Shares"), beneficially owned by AJR International Master
Fund,  Ltd., a British Virgin  Islands  company,  (ii)  4,906,640  Shares (2.3%)
beneficially  owned by Cambrian  Master  Fund,  Ltd., a British  Virgin  Islands
company,  (iii) 2,476,260  Shares (1.1%) held in several  Managed  Accounts (the
"Managed  Accounts"),  and (iv)  6,500  Shares  (0.002%)  beneficially  owned by
Atlantic  Investment  Management,  Inc.'s 401k/Profit Sharing Plan. In addition,
the sole  shareholder of Atlantic  Investment  Management,  Inc. (the "Reporting
Person"),  Mr.  Alexander J. Roepers,  may be deemed to  beneficially  own 4,900
Shares (0.002%).  The Reporting Person, serving as the investment advisor of the
foregoing  parties and the  Managed  Accounts,  has sole voting and  dispositive
power over all Shares  beneficially owned by such parties or held in the Managed
Accounts. See Items 2 and 5 for additional details.




Item 1.   Security and Issuer.
          -------------------

          This statement  relates to the common stock, par value $1.25 per share
(the "Shares"), of R.R. Donnelley & Sons Company (the "Issuer").  The Issuer has
principal executive offices located at 111 South Wacker Drive, Chicago, Illinois
60606.


Item 2.   Identity and Background.
          -----------------------

          (a) This statement is filed by Atlantic Investment Management, Inc., a
Delaware corporation (the "Reporting Person"), with respect to 10,811,400 Shares
over which the Reporting  Person has sole dispositive and voting power by reason
of serving as the  investment  advisor to: (i) AJR  International  Master  Fund,
Ltd., a British Virgin Islands company ("AJR"); (ii) Cambrian Master Fund, Ltd.,
a British  Virgin  Islands  company  ("Cambrian  Fund");  (iii) several  managed
accounts  (the "Managed  Accounts");  (iv) the  Reporting  Person's  401k/Profit
Sharing Plan (the "Plan");  and (v) Alexander J. Roepers, the president and sole
shareholder of the Reporting Person.

          (b) The business  address of the Reporting  Person and  Mr. Roepers is
666 Fifth Avenue, New York, New York 10103.

          (c) The  principal  business  of the  Reporting  Person  is that of an
investment  advisor  engaging  in  the  purchase  and  sale  of  securities  for
investment with the objective of capital appreciation on behalf of AJR, Cambrian
Fund, the Managed Accounts,  the Plan and Mr. Roepers.  The principal occupation
of Mr. Roepers is serving as the president and managing officer of the Reporting
Person.

          (d) Neither the Reporting  Person nor Mr. Roepers has, during the past
five (5) years,  been  convicted  in a criminal  proceeding  (excluding  traffic
violations or similar misdemeanors).

          (e) Neither the Reporting  Person nor Mr. Roepers has, during the past
five  (5)  years,  been a  party  to  any  civil  proceeding  of a  judicial  or
administrative body of competent jurisdiction and as a result of such proceeding
was or is now subject to a  judgment,  decree or final  order  enjoining  future
violations  of, or prohibiting  or mandating  activities  subject to, federal or
state securities laws or finding any violation with respect to such laws.

          (f) Mr. Roepers is a citizen of The Netherlands.





Item 3.   Source and Amount of Funds or Other Consideration.
          -------------------------------------------------

          The  Shares  purchased  by the  Reporting  Person  on  behalf  of AJR,
Cambrian  Fund,  the  Managed  Accounts  and the Plan  were  purchased  with the
investment capital of such entities and accounts.  The Shares that may be deemed
to be  beneficially  owned by Mr. Roepers  individually  were purchased with the
personal funds of Mr. Roepers or  members of Mr. Roepers' immediate family.  The
aggregate amount of funds used in making the purchases reported on this Schedule
13D was $30,810,998.


Item 4.   Purpose of Transaction.
          ----------------------

          The Reporting  Person acquired,  on behalf of AJR,  Cambrian Fund, the
Managed Accounts,  the Plan and Mr. Roepers (including  immediate family members
of Mr. Roepers), and continues to hold, the Shares reported in this Schedule 13D
for  investment   purposes.   The  Reporting  Person  intends  to  evaluate  the
performance  of the Shares as an investment in the ordinary  course of business.
The  Reporting  Person  pursues  an  investment  objective  that  seeks  capital
appreciation.  In pursuing  this  investment  objective,  the  Reporting  Person
analyzes the operations, capital structure and markets of companies in which the
Reporting  Person's clients invest,  including the Issuer, on a continuous basis
through analysis of documentation  and discussions with  knowledgeable  industry
and market observers and with representatives of such companies.

          The Reporting Person will continuously  assess the Issuer's  business,
financial  condition,  results of operations  and  prospects,  general  economic
conditions,  the  securities  markets  in  general  and those for the  Shares in
particular, other developments and other investment opportunities.  Depending on
such  assessments,  the Reporting  Person may acquire  additional  Shares or may
determine  to sell or otherwise  dispose of all or some of the Shares  presently
held by AJR,  Cambrian  Fund,  the Managed  Accounts,  the Plan and  Mr. Roepers
(including  immediate  family  members of  Mr. Roepers) in the open market or in
private  transactions.  Such  actions  will  depend  upon a variety of  factors,
including, without limitation, current and anticipated future trading prices for
the Shares, the financial condition,  results of operations and prospects of the
Issuer, alternative investment opportunities, general economic, financial market
and industry  conditions  and other factors that the  Reporting  Person may deem
material to its investment decision.






          The  Reporting  Person will continue its active  discussions  with the
Issuer's  management  with  respect to (i)  actions  which might be taken by the
management  of the Issuer to maximize  shareholder  value of the Issuer and (ii)
improving the Issuer's  investor  relations.  Attached are letters dated January
27,  2006 and  December  8, 2005 to the Chief  Executive  Officer of the Issuer,
outlining the Reporting  Person's  proposal for a substantial  share  repurchase
plan. In addition,  the Reporting Person may hold discussions with other parties
who might engage in shareholder  value  enhancing  activities for the benefit of
all of the Issuer's  shareholders.  There can be no assurance that the Reporting
Person will take any of the actions described in the previous sentence.

          Except as set forth above,  the Reporting  Person has no present plans
or proposals which relate to or would result in any of the transactions required
to be described in Item 4 of Schedule 13D.


Item 5.   Interest in Securities of the Issuer.
          ------------------------------------

          (a) Based upon the  information  contained in the  Issuer's  Quarterly
Report on Form  10-Q  filed  with the  Securities  and  Exchange  Commission  on
November 8, 2005,  there were issued and  outstanding  215,500,000  Shares as of
October 31, 2005.

          (b) The  Reporting  Person  does  not  directly  own any  Shares.  The
Reporting Person has entered into an investment  advisory agreement with each of
AJR,  Cambrian  Fund,  the Managed  Accounts and the Plan  pursuant to which the
Reporting Person has investment authority with respect to the securities held by
such entities or in such  accounts.  Such power includes the power to dispose of
and the power to vote the Shares.  By reason of the  provisions of Rule 13d-3 of
the Securities Exchange Act of 1934, as amended,  the Reporting Person is deemed
to be the beneficial owner of the Shares held by such entities and accounts.  In
addition,  the Reporting  Person has sole  dispositive and voting power over the
4,900  Shares  that may be  deemed  to be  beneficially  owned  by Mr.  Roepers.
Accordingly,  the Reporting  Person is deemed the beneficial owner of 10,811,400
Shares, or 5.0% of the outstanding Shares.

          (c) The  following  table  details the  transactions  by the Reporting
Person,  on behalf of AJR,  Cambrian Fund, the Managed Accounts and the Plan, in





Shares,  as well as transactions in Shares that may be deemed to be beneficially
owned by Mr. Roepers, during the past sixty (60) days:


  Date                Quantity             Price            Type of Transaction
  ----                --------             -----            -------------------

11/30/05              100,000             $34.1665          Open Market Purchase
12/28/05               40,000             $34.4226          Open Market Purchase
12/29/05               80,000             $34.5996          Open Market Purchase
12/30/05               90,000             $34.2100          Open Market Purchase
01/04/06               20,000             $33.8963          Open Market Purchase
01/26/06              300,000             $32.3131          Open Market Purchase
01/27/06              300,000             $32.6624          Open Market Purchase


          Except  for the  transactions  listed  above,  neither  the  Reporting
Person, any entity for which the Reporting Person serves as investment  advisor,
nor any person or entity  controlled by  the Reporting  Person,  nor Mr. Roepers
(including Mr. Roepers'  immediate  family members) has traded Shares during the
past sixty (60) days.


Item 6. Contracts, Arrangements, Understandings or Relationships with Respect to
        Securities of the Issuer.
        ------------------------------------------------------------------------

         Not Applicable


Item 7. Material to be filed as exhibits.
        --------------------------------

         See Exhibit A attached hereto.






                                    SIGNATURE
                                    ---------

          After  reasonable  inquiry  and  to  the  best  of  the  undersigned's
knowledge and belief,  the undersigned hereby certifies that the information set
forth in this statement is true, complete and correct.


                                          January 27, 2006


                                          ATLANTIC INVESTMENT MANAGEMENT, INC.


                                          By: /s/ Alexander J. Roepers
                                             -----------------------------------
                                              Alexander J. Roepers, President


      ATTENTION: INTENTIONAL MISSTATEMENTS OR OMISSIONS OF FACT CONSTITUTE
               FEDERAL CRIMINAL VIOLATIONS (SEE 18 U.S.C. 1001).







                                    Exhibit A
                                    ---------

                      Atlantic Investment Management, Inc.



By Fax and FedEx


January 27, 2006

Mr. Mark A. Angelson
Chief Executive Officer
R.R. Donnelley & Sons Company
111 South Wacker Drive
Chicago, Illinois 60606

Dear Mark:

I am writing you to  reiterate  our  December  8, 2005  proposal  (see  attached
letter) to R.R.  Donnelley & Sons (RRD) for a $1 billion share repurchase,  with
the  intent  to  complete  the  repurchase  promptly  through  open  market  and
negotiated  transactions.  For $1 million to $3 million of after-tax cash costs,
you can add 10% to RRD's  earnings  per  share  over and above  RRD's  currently
projected earnings growth (see attachment).

In the response to our proposal,  you agreed with our suggestion that management
should be seen as proactive in  enhancing  shareholder  value along all possible
avenues.

Over the past seven weeks,  despite  further  weakness in RRD shares,  there has
been no publicly-announced action on this highly compelling and timely proposal.
While we share a keen interest in enhancing value for all RRD  shareholders,  we
appear to have a  different  sense of  urgency  as it  relates  to acting on the
opportunity  created by the combination of RRD's weak share price, low borrowing
cost, generous dividend yield and solid balance sheet.

Your and your  team's  hard work over the past two  years to  integrate  RRD and
Moore Wallace,  improve  earnings and redirect the business  portfolio to higher
margin and growth areas is impressive,  and we remain highly supportive of these
efforts.

Now is the time to leverage the fruits of all this hard and smart labor over 186
million shares outstanding, instead of the current 217 million shares, achieving
much enhanced value for all RRD shareholders.

Sincerely,



Alexander J. Roepers
President




                      Atlantic Investment Management, Inc.

                                     1/27/06


                  RRD - $1B Share Repurchase Accretion Analysis
                                                   On 2006 Estimated Results
                                                   -------------------------

    EPS Impact
    ----------

    Number of Shares Repurchased                                     31.3
    Price/Shr                                                       $32.00
    Total Cost                                                     $1,000.0
    5.3% Interest on Cost of Funds                                   $53.0

    Estimated 2006 Net Income                                       $594.6
    Less After Tax (36.3% Rate) Cost of Added Interest Exp           $33.8
                                                                     -----
    Pro Forma Net Income                                            $560.8

    2006 Shares Out                                                  217.5
    Less Acquired                                                    31.3
                                                                     ----
    Pro Forma Shrs Out                                               186.3

    Pro Forma EPS                                                    $3.01
    ----------------------------------------------------------------------------
    Accretion Over Assumed 2006 EPS of $2.73                         $0.28      
    ----------------------------------------------------------------------------
    % Accretion                                                      10.3%
                                                           =====================

    After Tax Cash Cost
    -------------------

    After Tax Incremental Interest Expense                           $33.8
    Less Dividends Saved on Repurchased Shares                       $32.5
                                                                     -----
    ----------------------------------------------------------------------------
    Total After Tax Cost                                             $1.3       
    ----------------------------------------------------------------------------

                                                                         

                  RRD - $1B Share Repurchase Accretion Analysis
                                                   On 2007 Estimated Results
                                                   -------------------------

    EPS Impact
    ----------

    Number of Shares Repurchased                                     31.3
    Price/Shr                                                       $32.00
    Total Cost                                                     $1,000.0
    5.3% Interest on Cost of Funds                                   $53.0

    Estimated 2007 Net Income                                       $662.2
    Less After Tax (36.3% Rate) Cost of Added Interest Exp           $33.8
                                                                     -----
    Pro Forma Net Income                                            $628.4

    2007 Shares Out                                                  218.0
    Less Acquired                                                    31.3
                                                                     ----
    Pro Forma Shrs Out                                               186.8

    Pro Forma EPS                                                    $3.37
    ----------------------------------------------------------------------------
    Accretion Over Assumed 2007 EPS of $3.04                         $0.33      
    ----------------------------------------------------------------------------
    % Accretion                                                      10.7%
                                                           =====================

    After Tax Cash Cost

    After Tax Incremental Interest Expense                           $33.8
    Less Dividends Saved on Repurchased Shares                       $32.5
                                                                     -----
    ----------------------------------------------------------------------------
    Total After Tax Cost                                             $1.3       
    ----------------------------------------------------------------------------





                      Atlantic Investment Management, Inc.



By Fax and FedEx


December 8, 2005

Mr. Mark A. Angelson
Chief Executive Officer
R.R. Donnelley & Sons Company
111 South Wacker Drive
Chicago, Illinois 60606

Dear Mark:

As one of R.R.  Donnelley  & Sons'  (RRD)  largest  shareholders  with almost 10
million shares  (representing a 4.6% ownership stake), we share with you and the
Board of Directors a keen  interest in ensuring  that RRD  achieves  sustainable
growth of shareholder value for all RRD shareholders.

Pursuant to my meeting of today with RRD's Chief Financial Officer Glenn Richter
as  well  as our  recent  conversations,  I am  writing  you to  underscore  our
contention  that a unique and  opportune  time has  arrived to  consider a large
share  repurchase.  We see the  combination of a weak share price,  low interest
rates, a relatively high dividend yield and an already  well-balanced  portfolio
of  businesses   (arguably   reducing  the  immediate  need  for  another  large
acquisition) as contributing to the timeliness of a large share repurchase.

We  therefore  strongly  urge you and the Board of  Directors  to authorize a $1
billion share  repurchase,  with the intent to complete the repurchase  promptly
through open market and negotiated transactions.

The  proposed  $1  billion  share  repurchase  would  add more  than 9% to RRD's
earnings  per share  growth in the coming year with  negligible  after-tax  cash
cost.  Please see the attached for details.  In addition to increasing  earnings
per  share,  this  action is likely to result in a higher P/E  multiple  for RRD
shares as  management  will be seen as more  proactive in enhancing  shareholder
value  along all  possible  avenues.  Importantly,  RRD would  maintain  a solid
balance  sheet  with  ample  flexibility  to pursue  its  capital  spending  and
acquisition plans.

I appreciate your and the Board of Directors' time and attention to this matter.

Sincerely,



Alexander J. Roepers
President





                      Atlantic Investment Management, Inc.

                                     12/8/05


                  RRD - $1B Share Repurchase Accretion Analysis
                                                   On 2006 Estimated Results
                                                   -------------------------

    EPS Impact
    ----------

    Number of Shares Repurchased                                     29.4
    Price/Shr                                                       $34.00
    Total Cost                                                     $1,000.0
    5.3% Interest on Cost of Funds                                   $53.0

    Estimated 2006 Net Income                                       $594.6
    Less After Tax (36.3% Rate) Cost of Added Interest Exp           $33.8
                                                                     -----
    Pro Forma Net Income                                            $560.8

    2006 Shares Out                                                  217.5
    Less Acquired                                                    29.4
                                                                     ----
    Pro Forma Shrs Out                                               188.1

    Pro Forma EPS                                                    $2.98
    ----------------------------------------------------------------------------
    Accretion Over Assumed 2006 EPS of $2.73                         $0.25      
    ----------------------------------------------------------------------------
    % Accretion                                                      9.2%
                                                           =====================

    After Tax Cash Cost
    -------------------

    After Tax Incremental Interest Expense                           $33.8
    Less Dividends Saved on Repurchased Shares                       $30.6
                                                                     -----
    ----------------------------------------------------------------------------
    Total After Tax Cost                                             $3.2       
    ----------------------------------------------------------------------------

                                                                      

                  RRD - $1B Share Repurchase Accretion Analysis
                                                   On 2007 Estimated Results
                                                   -------------------------

    EPS Impact
    ----------

    Number of Shares Repurchased                                     29.4
    Price/Shr                                                       $34.00
    Total Cost                                                     $1,000.0
    5.3% Interest on Cost of Funds                                   $53.0

    Estimated 2007 Net Income                                       $662.2
    Less After Tax (36.3% Rate) Cost of Added Interest Exp           $33.8
                                                                     -----
    Pro Forma Net Income                                            $628.4

    2007 Shares Out                                                  218.0
    Less Acquired                                                    29.4
                                                                     ----
    Pro Forma Shrs Out                                               188.6

    Pro Forma EPS                                                    $3.33
    ----------------------------------------------------------------------------
    Accretion Over Assumed 2007 EPS of $3.04                         $0.29      
    ----------------------------------------------------------------------------
    % Accretion                                                      9.6%
                                                           =====================

    After Tax Cash Cost
    -------------------

    After Tax Incremental Interest Expense                           $33.8
    Less Dividends Saved on Repurchased Shares                       $30.6
                                                                     -----
    ----------------------------------------------------------------------------
    Total After Tax Cost                                             $3.2       
    ----------------------------------------------------------------------------