[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
Washington, D.C. 20549
OMB Number: 3235-0287
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
1. Name and Address of Reporting Person * LUNDQUIST NICHOLAS J 2. Issuer Name and Ticker or Trading Symbol FASTENAL CO [ FAST ] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director                      _____ 10% Owner
__ X __ Officer (give title below)      _____ Other (specify below)
Senior Executive VP
(Last)          (First)          (Middle)
3. Date of Earliest Transaction (MM/DD/YYYY)
WINONA, MN 55987
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)
6. Individual or Joint/Group Filing (Check Applicable Line) _ X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. 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   4/25/2019     M    37500   A $54   253500   D    
Common Stock   4/25/2019     S    37500   D $70.4848   216000   D    
Common Stock                  28000   I   Owned by Spouse  
Common Stock                  8470   (2) I   Held in 401(K) Plan  
Common Stock                  512   (3) I   Owned by father  

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. Trans. 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 7. Title and Amount of Securities Underlying Derivative Security
(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)   $54   4/25/2019     M         37500      (1) 5/31/2021   Common Stock   37500   $0   0   D    

Explanation of Responses:
(1)  These options will fully vest and become exercisable over a period of five years, with 50% vesting and becoming exercisable halfway through the relevant vesting period, and remainder vesting and becoming exercisable incrementally (20%, 20% and 10%) each year thereafter.
(2)  Shares attributed to reporting person's account within issuer's 401(K) Plan as of April 25, 2019 and includes 101 shares added to the account since the reporting person's prior holdings report filed on February 1, 2019.
(3)  Shares are owned by reporting person's father and the reporting person, along with his siblings, were provided a power of attorney in April of 2018 to share, among other things, investment and voting power over these shares. Reporting person disclaims beneficial ownership over these shares.

Reporting Owners
Reporting Owner Name / Address
Director 10% Owner Officer Other
WINONA, MN 55987

Senior Executive VP

/s/ John Milek, Attorney-in-Fact 4/29/2019
** Signature of Reporting Person Date

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.
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