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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1674365	Aptinyx Inc.	APTX	()	4

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1194172	H Wilbur Gantz	C/O Aptinyx Inc. 909 Davis Street, Suite 600 Evanston IL 60201		Yes	No	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2018-06-25	84,643	$0.00	193,265	No	4	C	Indirect	See footnote
Common Stock	Acquisiton	2018-06-25	96,733	$0.00	289,998	No	4	C	Indirect	See footnote
Common Stock	Acquisiton	2018-06-25	65,516	$0.00	355,514	No	4	C	Indirect	See footnote
Common Stock	Acquisiton	2018-06-25	17,000	$16.00	372,514	No	4	P	Indirect	See footnote
Common Stock	Acquisiton	2018-06-25	25,392	$0.00	25,392	No	4	C	Indirect	See footnote
Common Stock	Acquisiton	2018-06-25	29,020	$0.00	54,412	No	4	C	Indirect	See footnote
Common Stock	Acquisiton	2018-06-25	19,655	$0.00	74,067	No	4	C	Indirect	See footnote
Common Stock	Acquisiton	2018-06-25	6,100	$16.00	80,167	No	4	P	Indirect	See footnote

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	C	Indirect	See footnote
No	4	C	Indirect	See footnote
No	4	C	Indirect	See footnote
No	4	P	Indirect	See footnote
No	4	C	Indirect	See footnote
No	4	C	Indirect	See footnote
No	4	C	Indirect	See footnote
No	4	P	Indirect	See footnote

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Series A-1 Convertible Preferred Stock	Disposition	2018-06-25	2,334,966	$0.00	84,643	$0.00
Common Stock	Series A-1 Convertible Preferred Stock	Disposition	2018-06-25	700,489	$0.00	25,392	$0.00
Common Stock	Series A-2 Convertible Preferred Stock	Disposition	2018-06-25	2,668,508	$0.00	96,733	$0.00
Common Stock	Series A-2 Convertible Preferred Stock	Disposition	2018-06-25	800,552	$0.00	29,020	$0.00
Common Stock	Series B Convertible Preferred Stock	Disposition	2018-06-25	1,807,340	$0.00	65,516	$0.00
Common Stock	Series B Convertible Preferred Stock	Disposition	2018-06-25	542,203	$0.00	19,655	$0.00

Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
No	4	C	Indirect
No	4	C	Indirect
No	4	C	Indirect
No	4	C	Indirect
No	4	C	Indirect
No	4	C	Indirect

Footnotes

Each share of Series A-1 Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock automatically converted into shares of Common Stock on a 27.58621-for-one basis immediately prior to the closing of the Issuer's initial public offering without payment or consideration. The shares of Series A-1 Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock had no expiration date.
The shares are held directly by Wilbur H. Gantz III Revocable Trust, of which the reporting person is the trustee. The reporting person disclaims beneficial ownership of the reported securities except to the extent of his pecuniary interest therein.
The shares are held directly by LMC Holdings, LLC of which the reporting person is the manager. The reporting person disclaims beneficial ownership of the reported securities except to the extent of his pecuniary interest therein.
On June 25, 2018, the Wilbur H. Gantz III Revocable Trust and LMC Holdings, LLC purchased 17,000 and 6,100 shares of common stock of the Issuer at a price of $16.00 per share, respectively, pursuant to an underwritten public offering.