Comparable stake leader
Garrett Gruener
SEC ownership of NANOMIX Corp
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001473579.
Disclosed value leader
Garrett Gruener
Comparable rows
0/3
Latest evidence
01 Dec 2022
- Parsed ownership sources
-
3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Garrett Gruener
Ranking: Comparable ownership first, then disclosed value
- Latest parsed ownership date
-
01 Dec 2022
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001473579
- Issuer location
- Lawrence, MA
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 NANOMIX Corp (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
Garrett Gruener
Disclosed value leader
Garrett Gruener
Comparable rows
0/3
Latest evidence
01 Dec 2022
3/4/5
Highest disclosed value: $6,296,585
3 rows are not safely comparable across share classes.
Quick read
Garrett Gruener has the largest disclosed position value at $6.3M.
0 of 3 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 Garrett Gruener's linked filing trail.
Disclosed position value
Top 3
Garrett Gruener
$6.3M
David Ludvigson
$423.8K
Schiffman Gregory T.
$9K
Value bars compare disclosed positions; verify each figure against the linked filing evidence.
Detailed SEC evidence table Showing 1-3 of 3 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Garrett Gruener |
3/4/5
Director, 10%+ Owner
|
—
mixed-class rows
|
$6,296,585
33,034,021 shares
mixed-class rows
|
— | 08 Apr 2022 |
| David Ludvigson |
3/4/5
Interim CFO, Director
|
—
mixed-class rows
|
$423,794
3,390,352 shares
mixed-class rows
|
— | 01 Dec 2022 |
| Schiffman Gregory T. |
3/4/5
Director
|
—
mixed-class rows
|
$9,042
142,951 shares
mixed-class rows
|
— | 02 Mar 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 28 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 1-7 of 7 reporting-owner rows connected to NANOMIX Corp. Open a relationship link for the CIK-to-CIK filing trail.
Rows
7
Largest Forms 3/4/5 holder
Garrett Gruener
Net 12M change
$0
Latest report
19 Jan 2023
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Garrett Gruener | Director, 10%+ Owner | $6,296,585 | Filing P/S | 08 Apr 2022 | ||
| David Ludvigson | Interim CFO, Director | $423,794 | Mixed | 01 Dec 2022 | ||
| Schiffman Gregory T. | Director | $9,042 | Mixed | 02 Mar 2022 | ||
| Chris Hetterly | Chief Financial Officer | Mixed | 19 Jan 2023 | |||
| Vidur Sahney | Chief Operating Officer | Mixed | 14 Mar 2022 | |||
| Thomas Schlumpberger | CEO, Director | Mixed | 26 Jul 2022 | |||
| John Hardesky | Chief Commercial Officer | Mixed | 04 Jun 2021 |
Recent insider transactions for NANOMIX Corp
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.