UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. __)* Dynegy Inc. _______________________________________________________________________________ (Name of Issuer) Common Stock, Par Value $0.01 Per Share ___________________________________________________________ (Title of Class of Securities) 26816Q101 ________________________________________________ (CUSIP Number) December 31, 2005 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is filed: X Rule 13d-1(b) Rule 13d-1(c) Rule 13d-1(d) *The remainder of this cover page shall be filled out for a reporting persons initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior page. The information required in 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). (Continued on following pages (s)) Page 1 of 4 Pages CUSIP No. 26816Q101 13G Page 2 of 4 Pages (1) Names of Reporting Persons, S.S. or I.R.S. Ident. Nos. of Above Persons Sasco Capital, Inc. ______________________________________________________________________________ (2) Check the Appropriate Box if a Member of a Group* (a) / / (b) / X / ______________________________________________________________________________ (3) SEC Use Only ______________________________________________________________________________ (4) Citizenship or Place of Organization Fairfield, Connecticut ______________________________________________________________________________ Number of Shares (5) Sole Voting Power Beneficially Owned by 6,546,600 Each Reporting _______________________________________________ Person With (6) Shared Voting Power None _______________________________________________ (7) Sole Dispositive Power 15,508,700 _______________________________________________ (8) Shared Dispositive Power None ______________________________________________________________________________ (9) Aggregate Amount Beneficially Owned by Each Reporting Person 15,508,700 ______________________________________________________________________________ (10) Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares* ______________________________________________________________________________ (11) Percent of Class Represented by Amount in Row (9) 5.1% ______________________________________________________________________________ (12) Type of Reporting Person* IA Page 3 of 4 Pages Item 1(a) Name of Issuer: The issuer of the securities to which this statement relates is Dynegy, Inc. Item 1(b) Address of Issuers Principal Executive Offices: 1000 Louisiana, Suite 5800 Houston, TX 77002-5050 Item 2(a) Name of Person Filing: Sasco Capital, Incorporated Item 2(b) Address of Principal Business Office: 10 Sasco Hill Road Fairfield, CT 06824 Item 2(c) Citizenship: Sasco Capital, Inc. is a Connecticut corporation whose office is at Fairfield, Connecticut. Item 2(d) Title of Class of Securities: Common stock, par value $0.01 per share. Item 2(e) CUSIP Number: 26816Q101 Item 3 This statement is filed pursuant to Rule 13d-1(b) and the person filing: Daniel L. Leary, Secretary, for Sasco Capital, Inc. Item 4 Ownership. None. Page 4 of 4 Pages Item 5 Ownership of 5% or less of a Class Not applicable. Item 6 Ownership of More than 5% on Behalf of Another Person. Not applicable. Item 7 Identification and Classification of the Subsidiary Which Acquired Security Being Reported on by the Parent Holding Company. Not applicable. Item 8 Identification and Classification of Members of the Group. Not applicable. Item 9 Notice of Dissolution of Group. Item 10 Certification. To the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. _______________________________ Daniel L. Leary Secretary February 3, 2006