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NEPH

Nephros Inc

Company with tickers: NEPH

CIK
1196298
CUSIP
640671400
Shares Outstanding
10,856,546
13F Activity (30d)
14 filings 14 filers

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 21
Total Value: $15,208,187
Total Shares: 5,103,421

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 21 13F filers · Δ vs Dec 31, 2025
Top Holder
70.6%
Sep 2023 → Mar 2026 · range 70.6% – 86.0%
−14.5 pts
Top 5
90.7%
Sep 2023 → Mar 2026 · range 90.7% – 97.3%
−1.9 pts
Top 10
97.2%
Sep 2023 → Mar 2026 · range 96.8% – 100.0%
+0.4 pts
HHI
5,146
Sep 2023 → Mar 2026 · range 5,146 – 7,433
Highly concentrated−2,106

Quarterly Activity

vs Dec 31, 2025
New
5
Increased
2
Decreased
6
Sold Out
9
Unchanged
8
Holder count: -4
Institutional value: -26.7%
Shares held: +20.0%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds Open

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds Open

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD) Open
Showing 21 of 21
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Holder Value (USD) % of 13F Shares Open