Ken Griffin
NEPH icon

Ken Griffin’s Nephros NEPH Stock Holding History

Ken Griffin’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 		$62.2K Buy
20,888
+178
+0.9% +$711 ﹤0.01% 12312
2025
Q4 		$101K Buy
20,710
+4,165
+25% +$21.3K ﹤0.01% 11635
2025
Q3 		$78.3K Buy
16,545
+4,655
+39% +$18.3K ﹤0.01% 11987
2025
Q2 		$48.6K Sell
11,890
-134
-1% -$358 ﹤0.01% 11782
2025
Q1 		$20.7K Sell
12,024
-2,265
-16% -$3.55K ﹤0.01% 13120
2024
Q4 		$20.9K Sell
14,289
-2,947
-17% -$4.49K ﹤0.01% 13157
2024
Q3 		$29.5K Buy
17,236
+5,388
+45% +$10.7K ﹤0.01% 12457
2024
Q2 		$25K Buy
+11,848
New +$25.6K ﹤0.01% 12439
2023
Q2 		– Sell
-15,295
Closed -$16.7K – 14933
2023
Q1 		$16.7K Sell
15,295
-3,045
-17% -$3.5K ﹤0.01% 13191
2022
Q4 		$20.5K Buy
18,340
+5,225
+40% +$5.57K ﹤0.01% 13124
2022
Q3 		$12K Buy
13,115
+992
+8% +$1.4K ﹤0.01% 12230
2022
Q2 		$19K Buy
+12,123
New +$32.7K ﹤0.01% 12424
2021
Q2 		– Sell
-18,421
Closed -$123K – 14142
2021
Q1 		$123K Buy
+18,421
New +$145K ﹤0.01% 12269

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 $4.68T 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 $1.89T AUM 35.08% 1-Year Est. Return
Renaissance Technologies
Renaissance Technologies New York $72.6B AUM 54.88% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
HighTower Advisors
HighTower Advisors Chicago, Illinois $103B AUM 28.65% 1-Year Est. Return

Ken Griffin's NEPH Position: Q1 2026 in Review

Ken Griffin increased its Nephros (NEPH) stake by 0.86% in Q1 2026, buying an estimated $711 and bringing the position to 20,888 shares worth $62.2K. The position accounts for ﹤0.01% of the portfolio, ranked #12312.

Ken Griffin first reported a position in NEPH in Q1 2021 and has held it in 13 quarters since. The position peaked at $123K in Q1 2021. 27 funds tracked by Wall St. Rank hold NEPH as of Q1 2026.

  • Ken Griffin held 20,888 shares of Nephros worth $62.2K as of Q1 2026.
  • Ken Griffin bought 178 Nephros shares in Q1 2026, an estimated $711.
  • Nephros made up ﹤0.01% of Ken Griffin's portfolio in Q1 2026, its #12312 holding.
  • Ken Griffin first reported a position in Nephros in Q1 2021 and has held it in 13 quarters since.
  • Ken Griffin's Nephros position peaked at $123K in Q1 2021.
  • 27 funds tracked by Wall St. Rank held Nephros as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.