683 Capital Management, LLC

Activist investor & 5%+ owner · SC 13D/13G filings

Total Filings

Stocks Covered

Latest Filing

Mar 2, 2026

Filings

GOSS

Gossamer Bio, Inc.

SC 13G · Mar 2, 2026

5.2%

12.3M shares

MREO

Mereo BioPharma Group plc

SC 13G · Jan 6, 2026

8.2%

65.1M shares

INAB

IN8BIO, INC.

SC 13G · Dec 30, 2025

7.9%

770K shares

MRSN

Mersana Therapeutics, Inc.

SC 13G · Nov 24, 2025

5.5%

273K shares

MODD

Modular Medical, Inc.

SC 13G/A · Nov 14, 2025

3.3%

1.9M shares

INSE

Inspired Entertainment, Inc.

SC 13G/A · Nov 14, 2025

4.2%

1.1M shares

GUTS

FRACTYL HEALTH, INC.

SC 13G · Oct 14, 2025

5.3%

7.1M shares

MODD

Modular Medical, Inc.

SC 13G/A · Feb 14, 2025

6.4%

2.2M shares

INSE

INSPIRED ENTERTAINMENT, INC.

SC 13G/A · Feb 14, 2025

6.4%

1.7M shares

AFMDQ

Affimed N.V.

SC 13G/A · Feb 14, 2025

4.3%

655K shares

CCTS

Cactus Acquisition Corp. 1 Ltd

SC 13G/A · Nov 15, 2024

0.0%

0 shares

AFMDQ

Affimed N.V.

SC 13G · Oct 24, 2024

6.1%

925K shares

PCSC

Perceptive Capital Solutions Corp

SC 13G · Jun 24, 2024

5.6%

500K shares

MODD

Modular Medical, Inc.

SC 13G · Mar 1, 2024

7.0%

2.2M shares

BHACU

Focus Impact BH3 Acquisition Co

SC 13G/A · Feb 14, 2024

0.0%

0 shares

ENVA

Enova International, Inc.

SC 13G/A · Feb 14, 2024

1.9%

580K shares

EIGR

Eiger BioPharmaceuticals, Inc.

SC 13G/A · Feb 14, 2024

4.7%

70K shares

ARYE

ARYA Sciences Acquisition Corp V

SC 13G/A · Feb 14, 2024

0.0%

0 shares

CNDA

Concord Acquisition Corp II

SC 13G/A · Feb 14, 2024

0.0%

0 shares

CCTS

Cactus Acquisition Corp. 1 Ltd

SC 13G · Feb 14, 2024

8.9%

450K shares

CPAQU

Counter Press Acquisition Corporation

SC 13G/A · Feb 14, 2024

0.0%

0 shares

WVE

Wave Life Sciences Ltd.

SC 13G/A · Feb 14, 2024

4.7%

5.6M shares

FLAG.U

Calidi Biotherapeutics, Inc.

SC 13G/A · Feb 14, 2024

1.9%

676K shares

CDLX

Cardlytics, Inc.

SC 13G/A · Feb 14, 2024

4.6%

1.8M shares

INSE

Inspired Entertainment, Inc.

SC 13G/A · Feb 14, 2024

6.9%

1.8M shares

RKTA.U

Rocket Internet Growth Opportunities Corp.

SC 13G/A · Feb 14, 2024

0.0%

0 shares

TIOAU

Tio Tech A

SC 13G/A · Feb 14, 2024

0.0%

0 shares

SBNY

Signature Bank Corp

SC 13G/A · Feb 14, 2024

1.5%

958K shares

GTACU

Global Technology Acquisition Corp. I

SC 13G/A · Feb 14, 2024

0.0%

0 shares

ORIAU

Orion Biotech Opportunities Corp.

SC 13G/A · Feb 14, 2024

0.0%

0 shares

LITTU

Logistics Innovation Technologies Corp.

SC 13G/A · Feb 14, 2024

0.0%

0 shares

N/A

IRSA INVESTMENTS & REPRESENTATIONS INC.

SC 13G/A · Feb 14, 2024

3.5%

26.1M shares

CNDB.U

Concord Acquisition Corp III

SC 13G/A · Feb 14, 2024

3.4%

135K shares

PANA

Panacea Acquisition Corp. II

SC 13G/A · Feb 14, 2024

0.0%

0 shares

TCOA.U

Zalatoris Acquisition Corp.

SC 13G/A · Feb 14, 2024

0.0%

0 shares

AFMDQ

Affimed N.V.

SC 13G/A · Feb 13, 2024

4.8%

7.1M shares

SBNY

Signature Bank Corp

SC 13G · May 30, 2023

6.0%

3.8M shares

CDLX

Cardlytics, Inc.

SC 13G/A · Feb 14, 2023

5.7%

1.9M shares

TCOA.U

Trajectory Alpha Acquisition Corp.

SC 13G/A · Feb 14, 2023

8.6%

1.5M shares

IRS

IRSA INVESTMENTS & REPRESENTATIONS INC.

SC 13G/A · Feb 14, 2023

5.6%

45.4M shares

ARYE

ARYA Sciences Acquisition Corp V

SC 13G/A · Feb 14, 2023

6.5%

1.0M shares

OHAAU

OPY Acquisition Corp. I

SC 13G/A · Feb 14, 2023

1.8%

232K shares

RKTA.U

Rocket Internet Growth Opportunities Corp.

SC 13G/A · Feb 14, 2023

5.6%

1.5M shares

MRNS

Marinus Pharmaceuticals, Inc.

SC 13G/A · Feb 14, 2023

0.2%

90K shares

DRTT

Dirtt Environmental Solutions Ltd.

SC 13G/A · Feb 14, 2023

1.0%

218K shares

LITTU

Logistics Innovation Technologies Corp.

SC 13G/A · Feb 14, 2023

5.9%

2.0M shares

BHACU

Crixus BH3 Acquisition Company

SC 13G/A · Feb 14, 2023

10.0%

500K shares

INSE

Inspired Entertainment, Inc.

SC 13G/A · Feb 14, 2023

8.1%

2.1M shares

SQZ

SQZ Biotechnologies Company

SC 13G/A · Feb 14, 2023

4.5%

1.3M shares

EIGR

Eiger BioPharmaceuticals, Inc.

SC 13G/A · Feb 14, 2023

7.1%

3.1M shares