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 *
ROBERTS W IAN
  2. Issuer Name and Ticker or Trading Symbol
NANOPHASE TECHNOLOGIES CORPORATION [NANX]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
VP U.S. & International Sales
(Last)
(First)
(Middle)
1319 MARQUETTE DRIVE
3. Date of Earliest Transaction (Month/Day/Year)
06/20/2005
(Street)

ROMBOVILLE, IL 60446
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 06/20/2005   M   8,000 A $ 3.66 8,000 D  
Common Stock 06/20/2005   S   8,000 D $ 6.26 0 D  
Common Stock               1,000 D  

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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
Stock Option (right to buy) $ 7.6875             05/24/2001(1) 05/24/2010 Common Stock 5,200   5,200 D  
Stock Option (right to buy) $ 10.875             01/26/2002(1) 01/26/2011 Common Stock 12,500   12,500 D  
Stock Option (right to buy) $ 7.0625             02/28/2002(1) 02/28/2011 Common Stock 12,500   12,500 D  
Stock Option (right to buy) $ 6.65             01/03/2003(1) 01/03/2012 Common Stock 15,000   15,000 D  
Stock Option (right to buy) $ 3.66 06/20/2005   M     8,000 03/24/2004(1) 03/24/2013 Common Stock 12,000 $ 3.66 4,000 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
ROBERTS W IAN
1319 MARQUETTE DRIVE
ROMBOVILLE, IL 60446
      VP U.S. & International Sales  

Signatures

 /s/ W. Ian Roberts   06/21/2005
**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) Subject to certian restrictions, beginning on this date, options vest in three equal annual installments

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