Nephros Ownership | Who Owns Nephros?

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Nephros Ownership Summary

Nephros is owned by 48.94% institutional investors, 12.89% insiders, and 38.17% retail investors. Wexford capital lp is the largest institutional shareholder, holding 33.93% of NEPH shares. Vanguard US Total Market Shares ETF is the top mutual fund, with 1.22% of its assets in Nephros shares.

NEPH Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Nephros	48.94%	12.89%	38.17%
Sector	Healthcare Stocks	244.59%	12.11%	-156.70%
Industry	Medical Instruments & Supplies Stocks	63.80%	11.77%	24.43%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Wexford capital lp	3.60M	33.93%	$10.73M
Topline capital management	581.97K	5.48%	$1.73M
Vanguard group	233.64K	2.20%	$1.14M
Cornerstone capital	128.70K	1.21%	$383.53K
Bard associates	121.20K	1.14%	$361.18K
Mesirow financial investment management	120.00K	1.13%	$357.60K
Morgan stanley	110.92K	1.05%	$330.53K
Renaissance	99.40K	0.94%	$296.21K
Geode capital management	72.92K	0.69%	$217.38K
Hightower advisors	59.71K	0.56%	$177.94K

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Wexford capital lp	3.60M	1.55%	$10.73M
Topline capital management	581.97K	0.29%	$1.73M
Bard associates	121.20K	0.09%	$361.18K
Cornerstone capital	128.70K	0.04%	$383.53K
Elkhorn partners limited partnership	12.00K	0.02%	$35.76K
Essex investment management	38.98K	0.02%	$116.17K
De lisle partners llp	25.00K	0.01%	$74.50K
Navellier & associates	19.13K	0.01%	$56.99K
Mesirow financial investment management	120.00K	0.01%	$357.60K
Spears abacus advisors	11.00K	0.00%	$32.78K

Top Buyers

Holder	Shares	% Assets	Change
Cornerstone capital	128.70K	0.04%	128.70K
Morgan stanley	110.92K	-	92.96K
Mesirow financial investment management	120.00K	0.01%	70.00K
Vanguard fiduciary trust	36.90K	-	36.90K
Susquehanna group, llp	23.80K	-	23.80K

Top Sellers

Holder	Shares	% Assets	Change
Cambridge investment research advisors	-	-	-69.15K
Vanguard group	233.64K	-	-47.66K
Topline capital management	581.97K	0.29%	-32.34K
Quadrature capital	-	-	-23.00K
Marshall wace, llp	-	-	-21.98K

New Positions

Holder	Shares	% Assets	Change	Value
Cornerstone capital	128.70K	0.04%	128.70K	$383.53K
Vanguard fiduciary trust	36.90K	-	36.90K	$109.97K
Susquehanna group, llp	23.80K	-	23.80K	$34.75K

Sold Out

Holder	Change
Jpmorgan chase	-13.00
Newedge advisors	-36.00
Ubs group	-66.00
Wells fargo & company/mn	-73.00
Barclays	-106.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Jun 30, 2026	33	22.22%	5,313,140	-1.06%	48	1.93%	14	55.56%	9	-
Mar 31, 2026	15	-57.14%	938,488	-82.30%	8	0.35%	6	-76.00%	3	-40.00%
Dec 31, 2025	21	-8.70%	4,540,044	-9.47%	42	1.91%	15	87.50%	3	-62.50%
Sep 30, 2025	23	15.00%	5,015,032	3.35%	47	2.26%	8	-27.27%	8	60.00%
Jun 30, 2025	19	11.76%	4,852,137	4.02%	45	2.36%	10	66.67%	5	-

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Vanguard US Total Market Shares ETF	129.66K	1.22%	-
Vanguard Total Stock Mkt Idx Inv	130.90K	1.21%	-
Vanguard Morn Total Stk Mkt Idx Investor	130.90K	1.21%	-
Vanguard MStar Total Stk Mkt Idx Invest	130.90K	1.21%	-
Vanguard Institutional Extnd Mkt Idx Tr	67.74K	0.62%	-
Navellier Small-Mid Cap Growth	35.02K	0.32%	-
Fidelity Extended Market Index	32.37K	0.30%	-1.33K
iShares Micro-Cap ETF	17.51K	0.16%	-234.00
Fidelity Total Market Index	11.57K	0.11%	-
NT Ext Equity Mkt Idx Fd - L	10.61K	0.10%	-

Recent Insider Transactions

Date	Name	Role	Activity	Value
May 28, 2024	Amron Arthur H	-	Buy	$4.44K
May 30, 2024	Amron Arthur H	-	Buy	$6.73K
May 16, 2024	Banks Robert R. Jr.	President and CEO	Buy	$112.05K
Mar 12, 2024	Amron Arthur H	-	Buy	$17.13K
Dec 07, 2023	Banks Robert R. Jr.	President and CEO	Buy	$39.65K

Insider Transactions Trends

Date	Buy	Sell
2026 Q3	-	-
2026 Q2	-	-
2026 Q1	-	-
2025 Q4	-	-
2025 Q3	-	-

NEPH Ownership FAQ

Who Owns Nephros?

Nephros shareholders are primarily institutional investors at 48.94%, followed by 12.89% insiders and 38.17% retail investors. The average institutional ownership in Nephros's industry, Medical Instruments & Supplies Stocks, is 63.80%, which Nephros falls below.

Who owns the most shares of Nephros?

Nephros’s largest shareholders are Wexford capital lp (3.6M shares, 33.93%), Topline capital management (581.97K shares, 5.48%), and Vanguard group (233.64K shares, 2.20%). Together, they hold 41.61% of Nephros’s total shares outstanding.

Does Blackrock own Nephros?

BlackRock is not among the top 10 institutional shareholders of Nephros.

Who is Nephros’s biggest shareholder by percentage of total assets invested?

Wexford capital lp is Nephros’s biggest shareholder by percentage of total assets invested, with 1.55% of its assets in 3.6M Nephros shares, valued at 10.73M$.

Who is the top mutual fund holder of Nephros shares?

Vanguard US Total Market Shares ETF is the top mutual fund holder of Nephros shares, with 1.22% of its total shares outstanding invested in 129.66K Nephros shares.

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