Jim Simons
NEPH icon

Jim Simons’s Nephros NEPH Stock Holding History

Jim Simons’s Portfolio NEPH Stock Details NEPH Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$296K Sell
99,400
-4,372
-4% -$17.5K ﹤0.01% 2792
2025
Q4 		$506K Buy
103,772
+21,272
+26% +$109K ﹤0.01% 2571
2025
Q3 		$390K Buy
82,500
+71,600
+657% +$281K ﹤0.01% 2894
2025
Q2 		$44.6K Buy
+10,900
New +$29.1K ﹤0.01% 3410
2024
Q4 		– Sell
-24,444
Closed -$41.8K – 3788
2024
Q3 		$41.8K Sell
24,444
-16,556
-40% -$32.7K ﹤0.01% 3360
2024
Q2 		$86.5K Sell
41,000
-200
-0.5% -$432 ﹤0.01% 3209
2024
Q1 		$90K Buy
+41,200
New +$131K ﹤0.01% 3392
2023
Q3 		– Sell
-13,705
Closed -$21K – 3953
2023
Q2 		$21K Sell
13,705
-9,495
-41% -$14K ﹤0.01% 3766
2023
Q1 		$25K Sell
23,200
-8,864
-28% -$10.2K ﹤0.01% 3790
2022
Q4 		$37K Buy
32,064
+9,764
+44% +$10.4K ﹤0.01% 3853
2022
Q3 		$20K Buy
+22,300
New +$31.5K ﹤0.01% 3897
2022
Q2 		– Sell
-20,317
Closed -$89K – 4456
2022
Q1 		$89K Buy
+20,317
New +$96.4K ﹤0.01% 3816
2020
Q3 		– Sell
-17,900
Closed -$150K – 3576
2020
Q2 		$150K Buy
+17,900
New +$142K ﹤0.01% 3213

Other funds holding NEPH

WC
Wexford Capital West Palm Beach, Florida $690M AUM 57.88% 1-Year Est. Return
TCM
Topline Capital Management Santa Monica, California $605M AUM 26.24% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
CC
Cornerstone Capital Palo Alto, California $1.12B AUM 28.84% 1-Year Est. Return
BA
Bard Associates Chicago, Illinois $451M AUM 66.6% 1-Year Est. Return
MFIM
Mesirow Financial Investment Management Chicago, Illinois $6.37B AUM 23.22% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
HighTower Advisors
HighTower Advisors Chicago, Illinois $103B AUM 28.65% 1-Year Est. Return
EIM
Essex Investment Management Boston, Massachusetts $632M AUM 95.36% 1-Year Est. Return

Jim Simons's NEPH Position: Q1 2026 in Review

Jim Simons reduced its Nephros (NEPH) stake by 4.2% in Q1 2026, selling an estimated $17.5K and leaving 99,400 shares worth $296K. The position accounts for ﹤0.01% of the portfolio, ranked #2792.

Jim Simons first reported a position in NEPH in Q2 2020 and has held it in 13 quarters since. The position peaked at $506K in Q4 2025. 27 funds tracked by Wall St. Rank hold NEPH as of Q1 2026.

  • Jim Simons held 99,400 shares of Nephros worth $296K as of Q1 2026.
  • Jim Simons sold 4,372 Nephros shares in Q1 2026, an estimated $17.5K.
  • Nephros made up ﹤0.01% of Jim Simons's portfolio in Q1 2026, its #2792 holding.
  • Jim Simons first reported a position in Nephros in Q2 2020 and has held it in 13 quarters since.
  • Jim Simons's Nephros position peaked at $506K in Q4 2025.
  • 27 funds tracked by Wall St. Rank held Nephros as of Q1 2026.

Based on Renaissance Technologies's 13F filing for Q1 2026, filed 14 May 2026.