Nephros Inc. (NEPH)

About Nephros Inc.

Nephros Inc is a commercial-stage company that develops and sells high-performance water solutions to the medical and commercial markets. In medical markets, it sells water filtration products and waterborne pathogen detection products. In commercial markets, the company manufactures and sells water filters that improve the taste and odor of water and reduce biofilm, bacteria, and scale build-up in downstream equipment. The company's subsidiary is engaged in the development of its second-generation hemodiafiltration system and other products focused on improving therapies for patients with renal disease. The company generates almost all of revenue from product sales and a small amount from royalty revenue and other revenues.

Institutional ownership

In 13F filings for the quarter ended June 30, 2026, 31 institutions reported holding NEPH, with 5.3 million shares worth $18.8 million in aggregate. The largest reported holder was Wexford Capital, with 3.6 million shares worth $12.9 million. Of the 5 largest holders listed below, 1 added shares, 1 reduced its position and 3 held their positions unchanged during the quarter.

Form 13F is a quarterly report that institutional investment managers with at least $100 million in qualifying securities file with the SEC. It lists long positions as of the last day of the quarter and is due within 45 days of quarter end, so these holdings describe that date rather than today.

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