Ownership Submission
FORM 3
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  Chen Thomas F
2. Date of Event Requiring Statement (Month/Day/Year)
04/24/2006
3. Issuer Name and Ticker or Trading Symbol
ABBOTT LABORATORIES [ABT]
(Last)
(First)
(Middle)
100 ABBOTT PARK ROAD
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Senior Vice President
5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

ABBOTT PARK, IL 60064-6400
6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)
2. Amount of Securities Beneficially Owned
(Instr. 4)
3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)
4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common shares without par value 57,140
D
 
Common shares without par value 16,708 (1)
I
Profit Sharing Trust
Common shares without par value 23,798 (2)
I
By wife
Common shares without par value 2,476 (2)
I
By self for daughter

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)
2. Date Exercisable and Expiration Date
(Month/Day/Year)
3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)
4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)
6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Option (right to buy) (3) 02/12/2002 02/11/2009 Common shares 40,433 $ 42.4978 D  
Option (right to buy) (3) 01/18/2001 02/13/2007 Common shares 5,137 $ 39.716 D  
Option (right to buy) (3) 05/21/2001 02/12/2008 Common shares 15,202 $ 49.4617 D  
Option (right to buy) (3) 02/09/2004 02/08/2011 Common shares 53,202 $ 45.4488 D  
Option (right to buy) (3) 06/22/2002 02/10/2010 Common shares 9,686 $ 52.2529 D  
Option (right to buy) (3) 02/15/2005 02/14/2012 Common shares 53,201 $ 53.625 D  
Option (right to buy) (3) 06/03/2003 02/10/2010 Common shares 20,437 $ 41.1445 D  
Option (right to buy) (3) 02/14/2006 02/13/2013 Common shares 3,050 $ 33.2314 D  
Option (right to buy) (3) 12/06/2003 02/10/2010 Common shares 12,804 $ 41.9715 D  
Option (right to buy) (3) 02/20/2006 02/19/2014 Common shares 21,281 $ 41.0317 D  
Option (right to buy) (3) 02/20/2007 02/19/2014 Common shares 10,639 $ 41.0317 D  
Option (right to buy) (3) 10/21/2004 02/13/2013 Common shares 15,585 $ 41.5392 D  
Option (right to buy) (3) 05/10/2005 02/13/2007 Common shares 2,701 $ 44.96 D  
Option (right to buy) (3) 05/10/2005 02/10/2010 Common shares 2,223 $ 44.96 D  
Option (right to buy) (3) 05/10/2005 02/12/2008 Common shares 2,283 $ 44.96 D  
Option (right to buy) (3) 05/10/2005 02/12/2008 Common shares 18,444 $ 44.96 D  
Option (right to buy) (4) 02/18/2006 02/17/2015 Common shares 11,600 $ 46.34 D  
Option (right to buy) (4) 02/18/2007 02/17/2015 Common shares 11,600 $ 46.34 D  
Option (right to buy) (4) 02/18/2008 02/17/2015 Common shares 11,600 $ 46.34 D  
Option (right to buy) (4) 11/26/2005 02/13/2013 Common shares 14,418 $ 48.67 D  
Option (right to buy) (4) 08/15/2006 02/13/2013 Common shares 12,441 $ 42.83 D  
Option (right to buy) (4) 02/17/2007 02/16/2016 Common shares 12,000 $ 44.16 D  
Option (right to buy) (4) 02/17/2008 02/16/2016 Common shares 12,000 $ 44.16 D  
Option (right to buy) (4) 02/17/2009 02/16/2016 Common shares 12,000 $ 44.16 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Chen Thomas F
100 ABBOTT PARK ROAD
ABBOTT PARK, IL 60064-6400
      Senior Vice President  

Signatures

John A. Berry by power of attorney for Thomas F. Chen 05/01/2006
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Balance in the Abbott Laboratories Stock Retirement Trust as of April 28, 2006.
(2) Reporting person disclaims beneficial ownership of securities held by his wife and daughter.
(3) Employee stock options granted pursuant to the Abbott Laboratories 1996 Incentive Stock Program, including a replacement option feature, in a transaction exempt from Section 16(b) under Rule 16b-3.
(4) Employee stock options granted pursuant to the Abbott Laboratories 1996 Incentive Stock Program in a transaction exempt from Section 16(b) under Rule 16b-3.

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