Investors who own more than 5% of a class must file a Schedule 13D or 13G. Every filing since 12/18/2024, newest first.
| Issuer | % of Class | Filed | |||
|---|---|---|---|---|---|
|
Rainier Acquisition Corporation
13G
RNAQU · G73591110
|
11.2% |
9/3/2026
Event 8/27/2026
|
|||
| 683 Capital Management, LLC | 11.2% | ||||
| 683 Capital Partners, LP | 11.2% | ||||
| Ari Zweiman | 11.2% | ||||
|
Rainier Acquisition Corporation
13G
RNAQU · G73591110
|
11.2% |
9/3/2026
Event 8/27/2026
|
|||
| 683 Capital Management, LLC | 11.2% | ||||
| 683 Capital Partners, LP | 11.2% | ||||
| Ari Zweiman | 11.2% | ||||
|
Perceptive Capital Solutions Corp
13G/A
Amendment 2
PCSC · G70077105
|
0% |
8/12/2026
Event 6/30/2026
|
|||
| 683 Capital Management, LLC | 0% | ||||
| 683 Capital Partners, LP | 0% | ||||
| Ari Zweiman | 0% | ||||
|
Gossamer Bio, Inc.
13G
GOSS · 38341P102
|
10.0% |
6/11/2026
Event 6/4/2026
|
|||
| 683 Capital Management, LLC | 10.0% | ||||
| 683 Capital Partners, LP | 10.0% | ||||
| Ari Zweiman | 10.0% | ||||
|
Modular Medical, Inc.
13G/A
Amendment 1
MODD · 60785L207
|
4.7% |
5/15/2026
Event 3/31/2026
|
|||
| 683 Capital Management, LLC | 4.7% | ||||
| 683 Capital Partners, LP | 4.7% | ||||
| Ari Zweiman | 4.7% | ||||
|
Mersana Therapeutics, Inc.
13G/A
Amendment 2
MRSN · 59045L205
|
0% |
5/15/2026
Event 3/31/2026
|
|||
| 683 Capital Management, LLC | 0% | ||||
| 683 Capital Partners, LP | 0% | ||||
| Ari Zweiman | 0% | ||||
|
Fractyl Health, Inc.
13G/A
Amendment 1
GUTS · 35168W103
|
4.8% |
5/15/2026
Event 3/31/2026
|
|||
| 683 Capital Management, LLC | 4.8% | ||||
| 683 Capital Partners, LP | 4.8% | ||||
| Ari Zweiman | 4.8% | ||||
|
Immunic, Inc.
13G/A
Amendment 2
IMUX · 4525EP200
|
3.4% |
5/15/2026
Event 3/31/2026
|
|||
| 683 Capital Management, LLC | 3.4% | ||||
| 683 Capital Partners, LP | 3.4% | ||||
| Zweiman Ari | 3.4% | ||||
|
Gossamer Bio, Inc.
13G/A
Amendment 1
GOSS · 38341P102
|
3.9% |
3/24/2026
Event 3/18/2026
|
|||
| 683 Capital Management, LLC | 3.9% | ||||
| 683 Capital Partners, LP | 3.9% | ||||
| Ari Zweiman | 3.9% | ||||
|
Modular Medical, Inc.
13G
MODD · 60785L207
|
5.5% |
3/10/2026
Event 3/3/2026
|
|||
| 683 Capital Management, LLC | 5.5% | ||||
| 683 Capital Partners, LP | 5.5% | ||||
| Ari Zweiman | 5.5% | ||||
|
Gossamer Bio, Inc.
13G
GOSS · 38341P102
|
5.2% |
3/2/2026
Event 2/23/2026
|
|||
| 683 Capital Management, LLC | 5.2% | ||||
| 683 Capital Partners, LP | 5.2% | ||||
| Ari Zweiman | 5.2% | ||||
|
Mersana Therapeutics, Inc.
13G/A
Amendment 1
MRSN · 59045L205
|
7.0% |
2/17/2026
Event 12/31/2025
|
|||
| 683 Capital Management, LLC | 7.0% | ||||
| 683 Capital Partners, LP | 7.0% | ||||
| Ari Zweiman | 7.0% | ||||
|
Perceptive Capital Solutions Corp
13G/A
Amendment 1
PCSC · G70077105
|
7.2% |
2/17/2026
Event 12/31/2025
|
|||
| 683 Capital Management, LLC | 7.2% | ||||
| 683 Capital Partners, LP | 7.2% | ||||
| Ari Zweiman | 7.2% | ||||
|
Reviva Pharmaceuticals Holdings, Inc.
13G/A
Amendment 1
RVPH · 76152G100
|
3.0% |
2/17/2026
Event 12/31/2025
|
|||
| 683 Capital Management, LLC | 3.0% | ||||
| 683 Capital Partners, LP | 3.0% | ||||
| Zweiman Ari | 3.0% | ||||
|
Immunic, Inc.
13G/A
Amendment 1
IMUX · 4525EP101
|
5.9% |
2/17/2026
Event 12/31/2025
|
|||
| 683 Capital Management, LLC | 5.9% | ||||
| 683 Capital Partners, LP | 5.9% | ||||
| Zweiman Ari | 5.9% | ||||
|
Mereo BioPharma Group plc
13G
MREO · 589492107
|
8.2% |
1/6/2026
Event 12/29/2025
|
|||
| 683 Capital Management, LLC | 8.2% | ||||
| 683 Capital Partners, LP | 8.2% | ||||
| Ari Zweiman | 8.2% | ||||
|
IN8BIO, Inc.
13G
INAB · 45674E208
|
7.9% |
12/30/2025
Event 12/22/2025
|
|||
| 683 Capital Management, LLC | 7.9% | ||||
| 683 Capital Partners, LP | 7.9% | ||||
| Ari Zweiman | 7.9% | ||||
|
Mersana Therapeutics, Inc.
13G
MRSN · 59045L205
|
5.5% |
11/24/2025
Event 11/17/2025
|
|||
| 683 Capital Management, LLC | 5.5% | ||||
| 683 Capital Partners, LP | 5.5% | ||||
| Ari Zweiman | 5.5% | ||||
|
Inspired Entertainment, Inc.
13G/A
Amendment 9
INSE · 45782N108
|
4.2% |
11/14/2025
Event 7/2/2025
|
|||
| 683 Capital Management, LLC | 4.2% | ||||
| 683 Capital Partners, LP | 4.2% | ||||
| Ari Zweiman | 4.2% | ||||
|
Modular Medical, Inc.
13G/A
Amendment 2
MODD · 60785L207
|
3.3% |
11/14/2025
Event 8/14/2025
|
|||
| 683 Capital Management, LLC | 3.3% | ||||
| 683 Capital Partners, LP | 3.3% | ||||
| Ari Zweiman | 3.3% | ||||
|
Fractyl Health, Inc.
13G
GUTS · 35168W103
|
5.3% |
10/14/2025
Event 10/10/2025
|
|||
| 683 Capital Management, LLC | 5.3% | ||||
| 683 Capital Partners, LP | 5.3% | ||||
| Ari Zweiman | 5.3% | ||||
|
Reviva Pharmaceuticals Holdings, Inc.
13G
RVPH · 76152G100
|
5.4% |
9/29/2025
Event 9/22/2025
|
|||
| 683 Capital Management, LLC | 5.4% | ||||
| 683 Capital Partners, LP | 5.4% | ||||
| Zweiman Ari | 5.4% | ||||
|
Immunic, Inc.
13G
IMUX · 4525EP101
|
9.9% |
8/8/2025
Event 8/2/2025
|
|||
| 683 Capital Management, LLC | 9.9% | ||||
| 683 Capital Partners, LP | 9.9% | ||||
| Zweiman Ari | 9.9% | ||||
|
Modular Medical, Inc.
13G/A
Amendment 1
MODD · 60785L207
|
6.4% |
2/14/2025
Event 12/31/2024
|
|||
| 683 Capital Management, LLC | 6.4% | ||||
| 683 Capital Partners, LP | 6.4% | ||||
| Ari Zweiman | 6.4% | ||||
|
Inspired Entertainment, Inc.
13G/A
Amendment 8
INSE · 45782N108
|
6.4% |
2/14/2025
Event 12/31/2024
|
|||
| 683 Capital Management, LLC | 6.4% | ||||
| 683 Capital Partners, LP | 6.4% | ||||
| Ari Zweiman | 6.4% | ||||
|
Affimed N.V.
13G/A
Amendment 1
AFMDQ · N01045207
|
4.3% |
2/14/2025
Event 12/31/2024
|
|||
| 683 Capital Management, LLC | 4.3% | ||||
| 683 Capital Partners, LP | 4.3% | ||||
| Ari Zweiman | 4.3% | ||||