Comparable stake leader
Adam Koppel
SEC ownership of Aptinyx Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001674365.
Disclosed value leader
—
Comparable rows
0/11
Latest evidence
03 Jan 2023
- Parsed ownership sources
-
3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Adam Koppel
Ranking: Comparable ownership first, then disclosed value
- Latest parsed ownership date
-
03 Jan 2023
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001674365
- Issuer location
- Evanston, IL
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
1 signal
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of Aptinyx Inc. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Adam Koppel
Disclosed value leader
—
Comparable rows
0/11
Latest evidence
03 Jan 2023
3/4/5
Some rows are evidence-backed but not safely comparable across classes.
11 rows are not safely comparable across share classes.
Showing 1-8 of 11 holder rows.
Quick read
SEC ownership evidence is available, but the rows are not safely comparable across share classes.
0 of 11 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Adam Koppel's linked filing trail.
Detailed SEC evidence table Showing 1-8 of 11 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Adam Koppel |
3/4/5
Director, 10%+ Owner
|
—
class O/S missing
|
—
40,000 shares
|
— | 26 May 2022 |
| Andrew Kidd |
3/4/5
PRESIDENT AND CEO, Director
|
—
class O/S missing
|
—
700,000 shares
|
— | 03 Jan 2023 |
| Norbert G. Riedel |
3/4/5
EXECUTIVE CHAIRMAN OF THE BOD, Director
|
—
class O/S missing
|
—
420,000 shares
|
— | 03 Jan 2023 |
| Ashish Khanna |
3/4/5
CFO AND CBO
|
—
class O/S missing
|
—
375,000 shares
|
— | 03 Jan 2023 |
| Gilmore Neil O'Neill |
3/4/5
Director
|
—
class O/S missing
|
—
40,000 shares
|
— | 26 May 2022 |
| Gosebruch Henry O |
3/4/5
Director
|
—
class O/S missing
|
—
40,000 shares
|
— | 26 May 2022 |
| Joan W. Miller |
3/4/5
Director
|
—
class O/S missing
|
—
40,000 shares
|
— | 26 May 2022 |
| Patrick G. Enright |
3/4/5
Director
|
—
class O/S missing
|
—
40,000 shares
|
— | 26 May 2022 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Insider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 19 Jul 2025.
Buys
$0
Insiders: 0
Sells
$0
Insiders: 0
Net
$0
Shares: 0
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 0
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-11 of 11 reporting-owner rows connected to Aptinyx Inc.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
11
Largest Forms 3/4/5 holder
Norbert G. Riedel
Net 12M change
$0
Latest report
03 Jan 2023
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Norbert G. Riedel | EXECUTIVE CHAIRMAN OF THE BOD, Director | Mixed | 03 Jan 2023 | |||
| Gosebruch Henry O | Director | Mixed | 26 May 2022 | |||
| Ashish Khanna | Cfo And Cbo | Mixed | 03 Jan 2023 | |||
| Rachel E. Sherman | Director | Mixed | 26 May 2022 | |||
| Terry P. Gould | Director | Mixed | 26 May 2022 | |||
| Patrick G. Enright | Director | Mixed | 26 May 2022 | |||
| Joan W. Miller | Director | Mixed | 26 May 2022 | |||
| Andrew Kidd | PRESIDENT AND CEO, Director | Mixed | 03 Jan 2023 | |||
| Gilmore Neil O'Neill | Director | Mixed | 26 May 2022 | |||
| Adam Koppel | Director, 10%+ Owner | Mixed | 26 May 2022 | |||
| Robert J. Hombach | Director | Mixed | 26 May 2022 |
Recent insider transactions for Aptinyx Inc.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| No insider transactions were found in the last 12 months for this issuer. | ||||||||||
* marks a reported price that did not pass the local price check.