Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN 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 *
SILVER LAKE OFFSHORE AIV GP LTD
   2. Issuer Name and Ticker or Trading Symbol
SEAGATE TECHNOLOGY [STX] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)
C/O SILVER LAKE PARTNERS, 2725 SAND HILL ROAD, SUITE 150		 3. Date of Earliest Transaction (Month/Day/Year)
04/21/2005
(Street)

MENLO PARK, CA 94025		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Filing(Check Applicable Line)
___ Form filed by One Reporting Person
_X_ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)		 4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		 5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)		 6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)		 7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Shares 04/21/2005   S   15,000,000 (3) D $ 18.45 194,500,000 I See Footnotes (1) (2)

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)		 5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)		 6. Date Exercisable and Expiration Date
(Month/Day/Year)		 7. Title and Amount of Underlying Securities
(Instr. 3 and 4)		 8. Price of Derivative Security
(Instr. 5)		 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)		 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		 11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
SILVER LAKE OFFSHORE AIV GP LTD
C/O SILVER LAKE PARTNERS
2725 SAND HILL ROAD, SUITE 150
MENLO PARK, CA 94025		     X    
SILVER LAKE TECHNOLOGY INVESTORS CAYMAN LP
C/O SILVER LAKE PARTNERS
2725 SAND HILL ROAD, SUITE 150
MENLO PARK, CA 94025		     X    
SILVER LAKE INVESTORS CAYMAN LP
C/O SILVER LAKE PARTNERS
2725 SAND HILL ROAD, SUITE 150
MENLO PARK, CA 94025		     X    
SILVER LAKE PARTNERS CAYMAN LP
C/O SILVER LAKE PARTNERS
2725 SAND HILL ROAD, SUITE 150
MENLO PARK, CA 94025		     X    

Signatures

 /S/ Roberta S. Cohen, Attorney-in-Fact   04/25/2005
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(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) New SAC, the largest shareholder of Seagate Technology (the "Issuer"), beneficially owned 209,500,000 of the Issuer's common shares, par value $0.00001 per share (the "Common Shares"), prior to the transaction reported hereby and will beneficially own 194,500,000of the Common Shares after the transaction reported hereby. Affiliates of Silver Lake Partners, L.P. may be deemed, as a result of their ownership of 31.8% of the total outstanding ordinary shares of New SAC as of April 21, 2005, to have shared voting or dispositive power with respect to the Issuer's Common Shares beneficially owned by New SAC. However, the affiliates of Silver Lake Partners, L.P. disclaim this beneficial ownership. The affiliates of Silver Lake Partners, L.P. are Silver Lake Partners Cayman, L.P., Silver Lake Investors Cayman, L.P. and Silver Lake Technology Investors Cayman, L.P.
(2) The sole general partner of each of Silver Lake Partners Cayman, L.P. and Silver Lake Investors Cayman, L.P. is Silver Lake Technology Associates Cayman, L.P. The sole general partner of each of Silver Lake Technology Associates Cayman, L.P. and Silver Lake Technology Investors Cayman, L.P. is Silver Lake (Offshore) AIV GP LTD. The shareholders of Silver Lake (Offshore) AIV GP LTD. are Alan K. Austin, James A. Davidson, Glenn H. Hutchins, David J. Roux and Integral Capital Partners SLP LLC. All persons identified above disclaim beneficial ownership of any of the Issuer's Common Shares beneficially owned by New SAC, except to the extent of any pecuniary interest therein.
(3) The Common Shares disposed of by New SAC through the transaction reported hereby were sold pursuant to Rule 144 under the Securities Act of 1933, as amended.

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