Investor Riva Ridge Capital Management LP
13D/G Filings

This page shows a list of all the recent 13D/G filings made by Riva Ridge Capital Management LP . Schedule 13D is commonly referred to as a “beneficial ownership report.” The term "beneficial owner" is defined under SEC rules. It includes any person who directly or indirectly shares voting power or investment power (the power to sell the security).

When a person or group of persons acquires beneficial ownership of more than 5% of a voting class of a company’s equity securities, they are required to file a Schedule 13D within ten days after the purchase. Click the link icon to see the full transaction history.

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Date Form Target Prev
Shares		 Current
Shares		 Change
(Percent)		 Ownership
(Percent)		 Change
(Percent)
2025-07-30 13G SSUP / Superior Industries International, Inc. 1,575,000
2024-02-14 13G/A HDSN / Hudson Technologies, Inc. 2,442,672 1,704,928
2023-09-27 13D UPHL / UpHealth, Inc. 1,280,771 901,076
2023-03-09 13G UPHL / UpHealth, Inc. 1,280,771
2023-02-02 13G/A HDSN / Hudson Technologies, Inc. 2,743,996 2,442,672
2022-02-07 13G/A HDSN / Hudson Technologies, Inc. 2,331,691 2,743,996
2021-05-24 13G HDSN / Hudson Technologies, Inc. 2,331,691
2020-02-12 13G/A ZCOR / Zyla Life Sciences 1,238,661 938,661
2019-06-07 13G ZCOR / Zyla Life Sciences 1,238,661