William Blair & Company
NEPH icon

William Blair & Company’s Nephros NEPH Stock Holding History

William Blair & Company’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
Q2 		$129K Hold
36,249
– – ﹤0.01% 1646
2026
Q1 		$108K Hold
36,249
– – ﹤0.01% 1582
2025
Q4 		$177K Hold
36,249
– – ﹤0.01% 1489
2025
Q3 		$171K Hold
36,249
– – ﹤0.01% 1489
2025
Q2 		$148K Hold
36,249
– – ﹤0.01% 1466
2025
Q1 		$62.3K Hold
36,249
– – ﹤0.01% 1559
2024
Q4 		$53.3K Hold
36,249
– – ﹤0.01% 1599
2024
Q3 		$62K Hold
36,249
– – ﹤0.01% 1605
2024
Q2 		$76.5K Hold
36,249
– – ﹤0.01% 1546
2024
Q1 		$79.4K Hold
36,249
– – ﹤0.01% 1543
2023
Q4 		$125K Hold
36,249
– – ﹤0.01% 1476
2023
Q3 		$53.6K Hold
36,249
– – ﹤0.01% 1579
2023
Q2 		$56.2K Hold
36,249
– – ﹤0.01% 1584
2023
Q1 		$38.8K Hold
36,249
– – ﹤0.01% 1607
2022
Q4 		$41.9K Hold
36,249
– – ﹤0.01% 1597
2022
Q3 		$33K Hold
36,249
– – ﹤0.01% 1645
2022
Q2 		$55K Hold
36,249
– – ﹤0.01% 1618
2022
Q1 		$159K Hold
36,249
– – ﹤0.01% 1569
2021
Q4 		$214K Hold
36,249
– – ﹤0.01% 1544
2021
Q3 		$318K Hold
36,249
– – ﹤0.01% 1324
2021
Q2 		$368K Hold
36,249
– – ﹤0.01% 1271
2021
Q1 		$241K Hold
36,249
– – ﹤0.01% 1412
2020
Q4 		$311K Hold
36,249
– – ﹤0.01% 1253
2020
Q3 		$262K Hold
36,249
– – ﹤0.01% 1191
2020
Q2 		$304K Buy
36,249
+2,000
+6% +$15.8K ﹤0.01% 1087
2020
Q1 		$216K Hold
34,249
– – ﹤0.01% 1137
2019
Q4 		$341K Hold
34,249
– – ﹤0.01% 1132
2019
Q3 		$276K Buy
+34,249
New +$251K ﹤0.01% 1156

Other funds holding NEPH

Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
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
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
MFIM
Mesirow Financial Investment Management Chicago, Illinois $6.37B AUM 23.22% 1-Year Est. Return
HighTower Advisors
HighTower Advisors Chicago, Illinois $103B AUM 28.65% 1-Year Est. Return
NA
Navellier & Associates Reno, Nevada $1.26B AUM 95.39% 1-Year Est. Return
Vanguard Fiduciary Trust
Vanguard Fiduciary Trust Malvern, Pennsylvania $454B AUM

William Blair & Company's NEPH Position: Q2 2026 in Review

William Blair & Company held its Nephros (NEPH) position steady in Q2 2026 at 36,249 shares worth $129K. The position accounts for ﹤0.01% of the portfolio, ranked #1646.

William Blair & Company first reported a position in NEPH in Q3 2019 and has held it in 28 quarters since. The position peaked at $368K in Q2 2021. 29 funds tracked by Wall St. Rank hold NEPH as of Q2 2026.

  • William Blair & Company held 36,249 shares of Nephros worth $129K as of Q2 2026.
  • William Blair & Company left its Nephros share count unchanged in Q2 2026.
  • Nephros made up ﹤0.01% of William Blair & Company's portfolio in Q2 2026, its #1646 holding.
  • William Blair & Company first reported a position in Nephros in Q3 2019 and has held it in 28 quarters since.
  • William Blair & Company's Nephros position peaked at $368K in Q2 2021.
  • 29 funds tracked by Wall St. Rank held Nephros as of Q2 2026.

Based on William Blair & Company's 13F filing for Q2 2026, filed 11 Aug 2026.