Comparable stake leader
James E. Flynn
SEC ownership of Singular Genomics Systems, Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001850906.
Disclosed value leader
James E. Flynn
Comparable rows
2/10
Latest evidence
21 Feb 2025
- SEC evidence covered
- 3/4/5 and 13D/G
- Largest SEC-reported holder
- James E. Flynn
- Latest 13D/G holder
- James E. Flynn
- Latest parsed evidence date
- 21 Feb 2025
- CIK
- 0001850906
- Location
- San Diego, CA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
2 signals
Issuer
Who this page is about.
2 identity fields
Ownership snapshot
Top shareholders of Singular Genomics Systems, 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
James E. Flynn
Disclosed value leader
James E. Flynn
Comparable rows
2/10
Latest evidence
21 Feb 2025
3/4/5
13D/G
Lead comparable stake: 100%
8 rows are not safely comparable across share classes.
13D/G row: James E. Flynn
Showing 1-8 of 10 holder rows.
Quick read
James E. Flynn leads the comparable SEC ownership view at 100%.
2 of 10 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.
Comparable ownership
Top 2
James E. Flynn
100%
Domain Partners IX, L.P.
5%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 10 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| James E. Flynn |
3/4/5
13D/G
*Possible Member of 10% Group, 10%+ Owner · Deerfield Mgmt IV, L.P.
|
100%
from 13D/G
|
$3,891,028
9,142,019 shares
mixed-class rows
|
— | 01 Jun 2021 |
| Domain Partners IX, L.P. |
13D/G
|
5%
|
$38,888
125,446 shares
|
$0 | 31 Dec 2024 |
| Alexandria Venture Investments, LLC |
3/4/5
10%+ Owner
|
—
class O/S missing
|
$1,120,310
2,645,985 shares
|
— | 01 Jun 2021 |
| Andrew Spaventa |
3/4/5
Chief Executive Officer, Director
|
—
class O/S missing
|
$454,944
22,873 shares
|
— | 21 Feb 2025 |
| Jorge Velarde |
3/4/5
Senior Vice President
|
—
class O/S missing
|
$143,956
340,000 shares
|
— | 26 May 2021 |
| Sam Ropp |
3/4/5
Chief Commercial Officer
|
—
mixed-class rows
|
$138,368
167,000 shares
mixed-class rows
|
— | 15 Mar 2024 |
| Dalen Meeter |
3/4/5
Chief Financial Officer
|
—
class O/S missing
|
$120,970
6,000 shares
|
— | 21 Feb 2025 |
| Eli N. Glezer |
3/4/5
Chief Scientific Officer
|
—
class O/S missing
|
$120,970
6,000 shares
|
— | 21 Feb 2025 |
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 03 Jun 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 1-18 of 18 reporting-owner rows connected to Singular Genomics Systems, Inc.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
18
Largest Forms 3/4/5 holder
James E. Flynn
Net 12M change
$0
Latest report
21 Feb 2025
Recent insider transactions for Singular Genomics Systems, 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.