Riva Ridge Capital Management LP

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

Total Filings

Stocks Covered

Latest Filing

Nov 6, 2025

Filings

Ambipar Emergency Response

SC 13G · Nov 6, 2025

7.1%

1.2M shares

Hudson Technologies, Inc.

SC 13G/A · Feb 14, 2024

3.7%

1.7M shares

UpHealth, Inc.

SC 13D · Sep 27, 2023

5.0%

901K shares

UpHealth, Inc.

SC 13G · Mar 9, 2023

7.8%

1.3M shares

Hudson Technologies, Inc.

SC 13G/A · Feb 2, 2023

5.4%

2.4M shares