Pricing Supplement No. 13 dated May 5, 2003
(to Prospectus dated November 18, 2002
and Prospectus Supplement dated November 18, 2002)		   Filed under Rule 424(b)(3)
File No. 333-90316

SLM Corporation
Medium Term Notes, Series A
Due 9 Months or Longer From the Date of Issue


Principal Amount:
$750,000,000
 
Floating Rate Notes:
ý
 
Fixed Rate Notes:
o

Original Issue Date:
May 12, 2003
 
Closing Date: May 12, 2003
 
CUSIP Number:
78442F AS7

Maturity Date:
April 25, 2006
 
Option to Extend Maturity:
ý No
 
Specified Currency:
U.S. Dollars
      If Yes, Final Maturity Date: o Yes      
Redeemable at the option of the Company:   ý    No   Redemption Price: Not Applicable.
    o    Yes   Redemption Dates: Not Applicable.
Repayment at the option of the Holder:   ý    No   Repayment Price: Not Applicable.
    o    Yes   Repayment Dates: Not Applicable.
Applicable to Floating Rate Notes Only:        

Floating Rate Index:
 
 
 
 
 
 
  o CD Rate   Index Maturity:    Three Months.
  o Commercial Paper Rate        
  o CMT Rate   Spread:    Plus 17 basis points (0.17%).
  o Federal Funds Rate        
  ý LIBOR Telerate   Initial Interest Rate:    TBD.
  o LIBOR Reuters        
  o Prime Rate   Interest Rate Reset Period:    Quarterly.
  o 91-Day Treasury Bill Rate        

Reset Date(s):
Each January 25th, April 25th, July 25th and October 25th during the term of the Notes, subject to adjustment in accordance with the following business day convention, beginning July 25, 2003.
 
Interest Payment:
Each January 25th, April 25th, July 25th and October 25th during the term of the Notes, subject to adjustment in accordance with the following business day convention, beginning July 25, 2003.
ABN AMRO Incorporated
Banc One Capital Markets, Inc.
Credit Suisse First Boston
Lehman Brothers
Morgan Stanley		   Banc of America Securities LLC
Citigroup
Deutsche Bank Securities
Merrill Lynch & Co.
UBS Warburg
Wachovia Securities

May 5, 2003

Interest Determination Date:   2 London and New York Business Days prior to the related Reset Date.   Interest Period:   From and including the previous Interest Payment Date (or Original Issue Date, in the case of the first Interest Accrual Period) to but excluding the current Interest Payment Date (or Maturity Date, in the case of the last Interest Accrual Period).

Lock-in Period Start Date:
 
Not Applicable.
 
Accrual Method:
 
Actual/360.
Maximum Interest Rate:   Not Applicable.   Minimum Interest Rate:   Not Applicable.
Form: Book-entry.

Denominations:
$1,000 minimum and integral multiples of $1,000 in excess thereof.

Trustee:
JPMorgan Chase Bank, formerly known as The Chase Manhattan Bank.

Agents:
The following agents are acting as underwriters in connection with this issuance.

 
                Agents
 
Principal Amount of Notes

 
ABN AMRO Incorporated
 
$  13,700,000
  Banc of America Securities LLC       25,000,000
  Banc One Capital Markets, Inc.       10,000,000
  Citigroup Global Markets Inc.     188,000,000
  Credit Suisse First Boston LLC       45,000,000
  Deutsche Bank Securities Inc.       55,000,000
  Lehman Brothers Inc.       53,300,000
  Merrill Lynch, Pierce, Fenner & Smith Incorporated       55,000,000
  Morgan Stanley & Co. Incorporated       60,000,000
  UBS Warburg LLC       65,000,000
  Wachovia Securities, Inc.     180,000,000
          Total   $750,000,000

Issue Price:
100%.
 
 

Agents' Commission:
0.06%.
 
 

Net Proceeds:
$749,550,000.
 
 

Concession:
not to exceed 0.036%.
 
 

Reallowance:
not to exceed 0.025%
 
 

CUSIP Number:
78442F AS7
 
 

ISIN Number:
US78442F AS7
 
 



Obligations of SLM Corporation and any subsidiary of SLM Corporation are not guaranteed by the full faith and credit of the United States of America. Neither SLM Corporation nor any subsidiary of SLM Corporation (other than Student Loan Marketing Association) is a government-sponsored enterprise or an instrumentality of the United States of America.