SEC ownership of Nuwellis, Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001506492.
- CIK
- 0001506492
- Symbol
- NUWE on Nasdaq
- Location
- Eden Prairie, MN
- Parsed ownership evidence
- 13D/G, 3/4/5, and 13F
- Lead holder
- BIGGER CAPITAL FUND L P
- 13D/G signal
- BIGGER CAPITAL FUND L P
- Latest evidence date
- 28 Apr 2026
Ownership snapshot
Top shareholders of Nuwellis, Inc. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with the largest verified stakes, then open the linked filing trail.
Lead holder
BIGGER CAPITAL FUND L P
13D/G signal
BIGGER CAPITAL FUND L P
Evidence rows
25
Latest as of
28 Apr 2026
13D/G
3/4/5
13F
Lead comparable stake: 10%
13D/G row: BIGGER CAPITAL FUND L P
| 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 |
| SBI Securities Co., Ltd. |
13F
Company
|
0%
|
$66
63 shares
|
— | 31 Mar 2026 |
| UBS Group AG |
13F
Company
|
0%
|
$48
46 shares
|
— | 31 Mar 2026 |
| Caitong International Asset Management Co., Ltd |
13F
Company
|
0%
|
$4
4 shares
|
— | 31 Mar 2026 |
| Ankerstar Wealth, LLC |
13F
Company
|
0%
|
$1
1 shares
|
— | 31 Mar 2026 |
| George Montague |
3/4/5
CFO and Treasurer
|
—
class O/S missing
|
—
40,054 shares
|
— | 03 Mar 2022 |
| Robert Benjamin Scott |
3/4/5
Chief Financial Officer
|
—
class O/S missing
|
—
18,643 shares
|
— | 02 Sep 2023 |
| Michael Kendrick McCormick |
3/4/5
Director
|
—
class O/S missing
|
—
17,496 shares
|
— | 20 May 2025 |
| Steven Frank Brandt |
3/4/5
Director
|
—
class O/S missing
|
—
15,806 shares
|
— | 25 May 2022 |
| Lynn L. Blake |
3/4/5
Chief Financial Officer
|
—
class O/S missing
|
—
12,417 shares
|
— | 06 Jan 2023 |
| Neil P. Ayotte |
3/4/5
SVP, Secretary, GC & CCO
|
—
class O/S missing
|
—
8,640 shares
|
— | 03 Mar 2023 |
| Archelle Georgiou Feldshon |
3/4/5
Director
|
—
class O/S missing
|
—
6,744 shares
|
— | 28 Apr 2026 |
| David McDonald |
3/4/5
Director
|
—
class O/S missing
|
—
6,744 shares
|
— | 28 Apr 2026 |
| Gregory D. Waller |
3/4/5
Director
|
—
class O/S missing
|
—
6,744 shares
|
— | 28 Apr 2026 |
| Martin J. Emerson |
3/4/5
Director
|
—
class O/S missing
|
—
6,744 shares
|
— | 28 Apr 2026 |
| Nestor Jaramillo Jr. |
3/4/5
President and CEO, Director
|
—
class O/S missing
|
—
4,098 shares
|
— | 15 Mar 2023 |
| Jon W. Salveson |
3/4/5
Director
|
—
class O/S missing
|
—
2,146 shares
|
— | 19 May 2023 |
| Warren S. Watson |
3/4/5
Director
|
—
class O/S missing
|
—
2,146 shares
|
— | 19 May 2023 |
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 May 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 $ | Sell $ | Net $ |
|---|---|---|---|---|---|
| 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 |
Nuwellis, Inc. executives and other stock owners filed with the SEC include:
| 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 | |||
| Michael Kendrick McCormick | Director | Mixed | 20 May 2025 | |||
| Nestor Jaramillo Jr. | President and CEO, Director | Mixed | 15 Mar 2023 | |||
| 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 by Companies or Individuals for Nuwellis, Inc.
Showing up to 300 most recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | Value $ | * 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 | |||
| John L. Erb | NUWE | Incentive Stock Option (right to buy) | Award | 115,329 | 115,329 | 27 Jun 2025 | Direct | |||
| John L. Erb | NUWE | Common Stock | Conversion of derivative security | 0.69% | 7,522 | 1,100,022 | 10 Jun 2025 | Direct | ||
| John L. Erb | NUWE | Common Stock | Conversion of derivative security | 1,092,500 | 1,092,500 | 09 Jun 2025 | Direct | |||
| John L. Erb | NUWE | Series F-1 Convertible Preferred Stock | Conversion of derivative security | -66% | -66 | 34 | 09 Jun 2025 | Direct | ||
| John L. Erb | NUWE | Series F-1 Convertible Preferred Stock | Other | 100 | 100 | 09 Jun 2025 | Direct | |||
| John L. Erb | NUWE | Series F Convertible Preferred Stock | Other | -100% | -100 | 0 | 09 Jun 2025 | Direct |
* An asterisk sign (*) next to the price indicates that the price is likely invalid.