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 *
GROSS WILLIAM H
   2. Issuer Name and Ticker or Trading Symbol
PIMCO INCOME STRATEGY FUND [PFL] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
_____ Officer (give title below) __X__ Other (specify below)
See Remarks
(Last)
(First)
(Middle)
C/O PIMCO, 840 NEWPORT CENTER DRIVE, SUITE 100		 3. Date of Earliest Transaction (Month/Day/Year)
05/20/2010
(Street)

NEWPORT BEACH, CA 92660		 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
Common Stock 05/20/2010   P   100,000 A $ 10.23 520,633 D (1)  
Common Stock               3,726 I By Spouse

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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
GROSS WILLIAM H
C/O PIMCO
840 NEWPORT CENTER DRIVE, SUITE 100
NEWPORT BEACH, CA 92660		       See Remarks

Signatures

 /s/ Michael J. Flaherty, Attorney-in-Fact for William H. Gross   05/21/2010
**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) The reporting person's Form 4 filed on May 7, 2010 reported 421,500 aggregate shares held directly following the reported transactions. The reporting person subsequently filed an amended Form 4 ("Form 4/A") on May 12, 2010 correcting the actual number of shares received pursuant to an oversubscription privilege under a rights offering (as more fully described in footnotes to the Form 4 originally filed on 4/8/10). The correction reported on Form 4/A resulted in a decrease of 867 shares held by the reporting person. The aggregate shares reported as held directly on Line 1, Column 5, Table I on this Form 4 reflect the decrease of 867 shares previously reported on the Form 4/A.
 
Remarks:
Mr. Gross is Portfolio Manager of the Issuer. Mr. Gross is the Co-Chief Information Officer of Pacific Investment Management Company LLC (PIMCO) and is a member of PIMCO's Executive Committee. PIMCO serves as sub-adviser for the Issuer.

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