Comparable stake leader
BIGGER CAPITAL FUND L P
SEC ownership of Nuwellis, Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001506492.
Disclosed value leader
John L. Erb
Comparable rows
12/25
Latest evidence
30 Jun 2026
- Public ticker
- NUWE on Nasdaq
- Parsed ownership sources
-
13D/G, 3/4/5, and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
BIGGER CAPITAL FUND L P
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
12 of 25
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
BIGGER CAPITAL FUND L P
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
30 Jun 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001506492
- Issuer location
- Eden Prairie, MN
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of Nuwellis, 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
BIGGER CAPITAL FUND L P
Disclosed value leader
John L. Erb
Comparable rows
12/25
Latest evidence
30 Jun 2026
13D/G
3/4/5
13F
Lead comparable stake: 10%
13 rows are not safely comparable across share classes.
13D/G row: BIGGER CAPITAL FUND L P
Showing 1-8 of 25 holder rows.
Quick read
BIGGER CAPITAL FUND L P leads the comparable SEC ownership view at 10%.
12 of 25 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 BIGGER CAPITAL FUND L P's linked filing trail.
Comparable ownership
Top 5
BIGGER CAPITAL FUND L P
10%
John L. Erb
7.3%
ARMISTICE CAPITAL, LLC
7.1%
SABBY MANAGEMENT, LLC
5.4%
INTRACOASTAL CAPITAL, LLC
5%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 25 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BIGGER CAPITAL FUND L P |
13D/G
Bigger Michael
|
10%
|
$478,000
478,000 shares
|
$0 | 09 Jun 2025 |
| John L. Erb |
13D/G
3/4/5
ERB JOHN L · CEO and President, Director, 10%+ Owner
|
7.3%
|
$1,666,767
1,666,767 shares
|
$0 | 09 Jun 2025 |
| ARMISTICE CAPITAL, LLC |
13F
13D/G
Company
|
7.1%
from 13D/G
|
$248,010
236,200 shares
|
— | 31 Mar 2026 |
| SABBY MANAGEMENT, LLC |
13D/G
|
5.4%
|
$182,957
89,685 shares
|
$0 | 31 Dec 2025 |
| INTRACOASTAL CAPITAL, LLC |
13D/G
Mitchell P. Kopin
|
5%
|
$251,087
251,087 shares
|
$0 | 09 Jun 2025 |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
Company
|
2.7%
|
$46,384
44,176 shares
|
— | 31 Mar 2026 |
| Tower Research Capital LLC (TRC) |
13F
Company
|
0.31%
|
$5,448
5,189 shares
|
— | 31 Mar 2026 |
| CITIGROUP INC |
13F
Company
|
0.31%
|
$5,382
5,126 shares
|
— | 31 Mar 2026 |
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 02 Aug 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 1-17 of 17 reporting-owner rows connected to Nuwellis, Inc.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
17
Largest Forms 3/4/5 holder
John L. Erb
Net 12M change
$0
Latest report
30 Jun 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| John L. Erb | CEO and President, Director, 10%+ Owner | $66,001 | Mixed | 27 Jun 2025 | ||
| Katharyn Field | Director | Mixed | 21 Jan 2026 | |||
| Carisa Schultz | Chief Financial Officer | Mixed | 28 Jan 2026 | |||
| Jon W. Salveson | Director | Mixed | 19 May 2023 | |||
| Gregory D. Waller | Director | Mixed | 28 Apr 2026 | |||
| Warren S. Watson | Director | Mixed | 19 May 2023 | |||
| Lynn L. Blake | Chief Financial Officer | Mixed | 06 Jan 2023 | |||
| Steven Frank Brandt | Director | Mixed | 25 May 2022 | |||
| Neil P. Ayotte | SVP, Secretary, GC & CCO | Mixed | 03 Mar 2023 | |||
| George Montague | CFO and Treasurer | Mixed | 03 Mar 2022 | |||
| Nestor Jaramillo Jr. | President and CEO, Director | Mixed | 15 Mar 2023 | |||
| Michael Kendrick McCormick | President and CEO, Director | Mixed | 30 Jun 2026 | |||
| Robert Benjamin Scott | Chief Financial Officer | Mixed | 02 Sep 2023 | |||
| Archelle Georgiou Feldshon | Director | Mixed | 28 Apr 2026 | |||
| David McDonald | Director | Mixed | 28 Apr 2026 | |||
| Mika Grasso | Director | Mixed | 21 Jan 2026 | |||
| Martin J. Emerson | Director | Mixed | 28 Apr 2026 |
Recent insider transactions for Nuwellis, 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Gregory D. Waller | NUWE | Nonstatutory Stock Option (right to buy) | Award | 6,744 | 6,744 | 28 Apr 2026 | Direct | |||
| Martin J. Emerson | NUWE | Nonstatutory Stock Option (right to buy) | Award | 6,744 | 6,744 | 28 Apr 2026 | Direct | |||
| Archelle Georgiou Feldshon | NUWE | Nonstatutory Stock Option (right to buy) | Award | 6,744 | 6,744 | 28 Apr 2026 | Direct | |||
| David McDonald | NUWE | Nonstatutory Stock Option (right to buy) | Award | 6,744 | 6,744 | 28 Apr 2026 | Direct |
* marks a reported price that did not pass the local price check.