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 *
SIEGEL RICHARD W
  2. Issuer Name and Ticker or Trading Symbol
NANOPHASE TECHNOLOGIES Corp [NANX]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director _____ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)
1319 MARQUETTE DRIVE
3. Date of Earliest Transaction (Month/Day/Year)
05/23/2015
(Street)

ROMEOVILLE, 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               389,838 D  

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
Common Stock (right to purchase) $ 1.36             01/31/2012(1) 01/31/2021 Common Stock 10,000   10,000 D  
Deferred Common Stock (2)               (3)   (3)(4) Common Stock 20,030   20,030 D  
Common Stock (right to purchase) $ 0.3             08/07/2013(1) 08/07/2022 Common Stock 10,000   10,000 D  
Common Stock (right to purchase) $ 0.415             02/14/2014(1) 02/14/2023 Common Stock 10,000   10,000 D  
Common Stock (right to purchase) $ 0.52             02/13/2015(5) 02/13/2024 Common Stock 10,000   10,000 D  
Common Stock (right to purchase) $ 0.44             02/18/2016(1) 02/18/2025 Common Stock 9,000   9,000 D  
Common Stock (right to purchase) $ 0.42             02/23/2017(1) 02/23/2026 Common Stock 8,100   8,100 D  
Common Stock (right to purchase) $ 0.9 (6)             11/17/2016(6) 11/17/2026 Common Stock 2,000   2,000 D  
Common Stock (right to purchase) $ 1.05 (6)             11/17/2016(6) 11/17/2026 Common Stock 2,000   2,000 D  
Common Stock (right to purchase) $ 1.18 (6)             11/17/2016(6) 11/17/2026 Common Stock 2,000   2,000 D  
Common Stock (right to purchase) $ 0.84 (6)             11/17/2016(6) 11/17/2026 Common Stock 2,000   2,000 D  
Common Stock (right to purchase) $ 1.85 (6)             11/17/2016(6) 11/17/2026 Common Stock 2,000   2,000 D  
Common Stock (right to purchase) $ 1.1 (6)             11/17/2016(6) 11/17/2026 Common Stock 2,000   2,000 D  
Common Stock (right to purchase) $ 0.99 (6)             11/17/2016(6) 11/17/2026 Common Stock 2,000   2,000 D  
Common Stock (right to purchase) $ 0.68             02/21/2018(5) 02/21/2027 Common Stock 10,000   10,000 D  
Common Stock (right to purchase) $ 0.82 05/23/2018   A   10,000   05/23/2019(5) 05/23/2028 Common Stock 10,000 $ 0.82 10,000 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
SIEGEL RICHARD W
1319 MARQUETTE DRIVE
ROMEOVILLE, IL 60446
  X      

Signatures

 By Jess Jankowski under UPA for Richard W. Siegel   05/24/2018
**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 certain rights and restrictions, beginning on this date, options vest in three equal annual installments.
(2) Each share of deferred common stock represents a right to receive one share of common stock.
(3) The deferred common stock becomes payable upon the reporting person's termination of service as a director of the Company.
(4) Pursuant to such plan, the reporting person elected to defer receipt of such shares and receive a cumulative total of 20,030 shares of deferred common stock which will all be accounted for under the Company's Non-Employee Director Deferred Compensation Plan.
(5) Subject to certain restrictions, beginning on this date, options vest in three equal annual installments.
(6) The stock appreciation rights payable upon the reporting person's termination of service as a director of the Company were terminated, with stock options issued at identical exercise prices to the conversion prices of the respective stock appreciation rights. 2,000 were issued with an exercise price of $0.90, 2,000 were issued with an exercise price of $1.05, 2,000 were issued with an exercise price of $1.18, 2,000 were issued with an exercise price of $0.84, 2,000 were issued with an exercise price of $1.85, 2,000 were issued with an exercise price of $1.10, and 2,000 were issued with an exercise price of $0.99.

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