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 *
BARTON MATHIAS J
  2. Issuer Name and Ticker or Trading Symbol
Dorman Products, Inc. [DORM]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
CEO
(Last)
(First)
(Middle)
C/O DORMAN PRODUCTS, INC., 3400 WALNUT STREET
3. Date of Earliest Transaction (Month/Day/Year)
11/29/2018
(Street)

COLMAR, PA 18915
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 11/27/2018   G V 7,500 D $ 0 82,931 D  
Common Stock 11/29/2018   M   8,135 A $ 41.59 91,066 D  
Common Stock 11/29/2018   F   1,581 D $ 87.48 89,485 D  
Common Stock 11/29/2018   M   2,978 A $ 78.64 92,463 D  
Common Stock 11/29/2018   F   2,677 D $ 87.48 89,786 D  
Common Stock 11/29/2018   S(1)   14,886 D $ 87.777 (2) 74,900 D  
Common Stock 11/29/2018   S(1)   6,485 D $ 88.899 (3) 68,415 D  
Common Stock 11/29/2018   S(1)   1,500 D $ 89.367 (4) 66,915 D  
Common Stock 11/30/2018   S(1)   12,541 D $ 87.283 (5) 54,374 D  
Common Stock 11/30/2018   S(1)   3,459 D $ 87.997 (6) 50,915 D  
Common Stock               600 I By Trust
Common Stock               1,989 (7) I By 401(k)

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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
Employee Stock Option (right to buy) $ 41.59 11/29/2018   M     8,135   (8) 02/12/2021 Common Stock 8,135 $ 0 8,134 D  
Employee Stock Option (right to buy) $ 78.64 11/29/2018   M     2,978   (9) 02/27/2022 Common Stock 2,978 $ 0 8,934 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
BARTON MATHIAS J
C/O DORMAN PRODUCTS, INC.
3400 WALNUT STREET
COLMAR, PA 18915
  X     CEO  

Signatures

 /s/ Thomas J. Knoblauch, by Power of Attorney   12/03/2018
**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) This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 26, 2018.
(2) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $87.24 to $88.22. The reporting person undertakes to provide to Dorman Products, Inc., any security holder of Dorman Products, Inc. or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
(3) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $88.26 to $89.215. The reporting person undertakes to provide to Dorman Products, Inc., any security holder of Dorman Products, Inc. or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
(4) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $89.28 to $89.49. The reporting person undertakes to provide to Dorman Products, Inc., any security holder of Dorman Products, Inc. or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
(5) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $86.71 to $87.70. The reporting person undertakes to provide to Dorman Products, Inc., any security holder of Dorman Products, Inc. or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
(6) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $87.73 to $88.34. The reporting person undertakes to provide to Dorman Products, Inc., any security holder of Dorman Products, Inc. or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
(7) The shares are represented by units held in a unitized stock fund through the Issuer's 401(k) Retirement Plan and Trust. The unitized stock fund of the Issuer's 401(k) Retirement Plan and Trust consists of cash and Common Stock in amounts that vary from time to time. As of November 30, 2018 the reporting person had 1,302 units in the Issuer's 401(k) Retirement Plan and Trust, which units consisted of 1,989 shares of Common Stock.
(8) The option vests in four equal annual installments beginning on February 12, 2017, which was the first anniversary of the date of grant.
(9) The option vests in four equal annual installments beginning on February 27, 2018, which was the first anniversary of the date of grant.
 
Remarks:
The filing of this Statement shall not be construed as an admission (a) that the person filing this Statement is, for the purposes of Section 16 of the Securities Exchange Act of 1934, as amended, the beneficial owner of any equity securities covered by this Statement, or (b) that this Statement is legally required to be filed by such person.

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