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
                                                                                  
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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 *

ADAMS STREET PARTNERS LLC
2. Issuer Name and Ticker or Trading Symbol

Aptinyx Inc. [ APTX ]
5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director                    __X__ 10% Owner
_____ Officer (give title below)    _____ Other (specify below)
(Last)          (First)          (Middle)

ONE NORTH WACKER DRIVE, STE 2700
3. Date of Earliest Transaction (MM/DD/YYYY)

9/30/2019
(Street)

CHICAGO, IL 60606
(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

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
Stock Option (Right to Buy)  $3.49  9/30/2019    A     4802 (1)      (2) 9/29/2029  Common Stock  4802  $2.082  4802  I  See Footnote (3)

Explanation of Responses:
(1)  The option award was issued to Elisha P. ("Terry") Gould III, who elected to take equity awards in lieu of cash compensation for services as a director, pursuant to the Issuer's non-employee director compensation plan. The number of options granted was determined by dividing the cash compensation otherwise payable with respect to the quarter by the Black-Scholes value of a single option calculated as of the date of the grant.
(2)  This option is fully vested at time of grant.
(3)  Elisha P. Gould III is a partner of Adams Street Partners, LLC ("Adams Street"). Adams Street is the direct or indirect general partner/investment adviser of managed entities that own common stock of the Issuer. By agreement with certain of such Adams Street funds, Mr. Gould is deemed to hold the stock options for the benefit of those funds. Thomas S. Bremner, Jeffrey T. Diehl, Elisha P. Gould III, Robin Murray and Fred Wang, each of whom is a partner of Adams Street (or a subsidiary thereof) may be deemed to have shared voting and investment power over the options. Adams Street and Thomas S. Bremner, Jeffrey T. Diehl, Elisha P. Gould III, Robin Murray and Fred Wang disclaim beneficial ownership of the options except to the extent of their pecuniary interest therein.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
ADAMS STREET PARTNERS LLC
ONE NORTH WACKER DRIVE
STE 2700
CHICAGO, IL 60606

X


Signatures
/s/ Sara Robinson Dasse 10/2/2019
**Signature of Reporting Person Date


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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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