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 *
MacLennan Mark
   2. Issuer Name and Ticker or Trading Symbol
SILICON VALLEY BANCSHARES [SIVB] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) __X__ Other (specify below)
Head of Global Finl Services / Head of Global Finl Services
(Last)
(First)
(Middle)
3003 TASMAN DRIVE		 3. Date of Earliest Transaction (Month/Day/Year)
04/26/2005
(Street)

SANTA CLARA, CA 95054		 4. If Amendment, Date Original Filed(Month/Day/Year)
 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 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

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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
Incentive Stock Option (right to buy) $ 46.31 04/26/2005   A   2,159   04/26/2006(1) 04/26/2012 Common Stock 2,159 $ 0 2,159 D  
Non-Qualified Stock Option (right to buy) $ 46.31 04/26/2005   A   7,841   04/26/2006(1) 04/26/2012 Common Stock 7,841 $ 0 7,841 D  
Restricted Stock Unit $ 0 04/26/2005   A   5,250   12/01/2006(2) 12/01/2007 Common Stock 5,250 $ 0 5,250 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
MacLennan Mark
3003 TASMAN DRIVE
SANTA CLARA, CA 95054		       Head of Global Finl Services Head of Global Finl Services

Signatures

 By: Lisa Bertolet as attorney in fact For: Mark A. MacLennan   04/28/2005
**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) Stock options were granted to the reporting person. Vesting will occur annually from the date of grant over 4 years with 25% vesting each year.
(2) The reporting person was granted restricted stock units (RSUs) which are subject to performance-based vesting. The RSUs are effective as of 4/26/05, and will vest on 12/1/06, based on the level of return on average equity (ROE) achieved by the Company at December 31, 2005 as follows: (i) if less than 90% of target, nonewill vest; (ii) if 90% but less than 100% of target 1,750 will vest; (iii) if 100% but less than 110% of target 3,500 will vest; and (iv) if 110% or greater of target 5,250 will vest. Vesting is subject to adjustment by the Compensation Committee as approved to take into account extraordinary items that may impact the calculation of ROE.

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