Russell Investments Group
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Russell Investments Group’s Castle Biosciences CSTL Stock Holding History

Russell Investments Group’s Portfolio CSTL Stock Details CSTL Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$761K Buy
31,679
+22,364
+240% +$498K ﹤0.01% 2592
2026
Q1 		$229K Buy
9,315
+6,827
+274% +$224K ﹤0.01% 2807
2025
Q4 		$96.8K Sell
2,488
-20
-0.8% -$645 ﹤0.01% 3054
2025
Q3 		$57.1K Buy
2,508
+976
+64% +$19.8K ﹤0.01% 3231
2025
Q2 		$31.3K Sell
1,532
-17,137
-92% -$317K ﹤0.01% 3094
2025
Q1 		$373K Buy
18,669
+11,457
+159% +$284K ﹤0.01% 2397
2024
Q4 		$192K Sell
7,212
-18,162
-72% -$553K ﹤0.01% 2547
2024
Q3 		$724K Sell
25,374
-9,131
-26% -$232K ﹤0.01% 2151
2024
Q2 		$751K Buy
34,505
+2,812
+9% +$62.7K ﹤0.01% 2075
2024
Q1 		$702K Sell
31,693
-290
-0.9% -$6.31K ﹤0.01% 2099
2023
Q4 		$690K Buy
31,983
+2,998
+10% +$52.8K ﹤0.01% 2117
2023
Q3 		$490K Buy
28,985
+21,265
+275% +$372K ﹤0.01% 2233
2023
Q2 		$106K Buy
+7,720
New +$156K ﹤0.01% 2595
2022
Q4 		– Sell
-86,551
Closed -$2.25M – 2908
2022
Q3 		$2.25M Buy
+86,551
New +$2.43M 0.01% 1484
2021
Q4 		– Sell
-88,774
Closed -$5.9M – 3012
2021
Q3 		$5.9M Buy
88,774
+10,877
+14% +$765K 0.01% 1153
2021
Q2 		$5.71M Sell
77,897
-2,114
-3% -$140K 0.01% 1268
2021
Q1 		$5.47M Sell
80,011
-30,374
-28% -$2.28M 0.01% 1323
2020
Q4 		$7.41M Buy
110,385
+1,436
+1% +$77.8K 0.01% 1033
2020
Q3 		$5.6M Buy
108,949
+18,595
+21% +$827K 0.01% 1070
2020
Q2 		$3.4M Buy
90,354
+13,986
+18% +$478K 0.01% 1321
2020
Q1 		$2.27M Buy
76,368
+22,745
+42% +$686K 0.01% 1398
2019
Q4 		$1.84M Buy
53,623
+36,305
+210% +$888K ﹤0.01% 1793
2019
Q3 		$313K Buy
+17,318
New +$384K ﹤0.01% 2453

Other funds holding CSTL

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Principal Financial Group
Principal Financial Group Des Moines, Iowa $204B AUM 27.99% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
ACM
AIGH Capital Management Baltimore, Maryland $1.59B AUM 855.46% 1-Year Est. Return
PAM
Panagora Asset Management Boston, Massachusetts $32.6B AUM 52.29% 1-Year Est. Return
WA
Wasatch Advisors Salt Lake City, Utah $15.3B AUM 25.06% 1-Year Est. Return
KCM
Kornitzer Capital Management Shawnee Mission, Kansas $4.79B AUM 30.56% 1-Year Est. Return
New York State Common Retirement Fund
New York State Common Retirement Fund Albany, New York $79.3B AUM 43.63% 1-Year Est. Return
N
Nuveen Charlotte, North Carolina $419B AUM 43.02% 1-Year Est. Return
Bank of New York Mellon
Bank of New York Mellon New York $609B AUM 40.19% 1-Year Est. Return

Russell Investments Group's CSTL Position: Q2 2026 in Review

Russell Investments Group increased its Castle Biosciences (CSTL) stake by 240% in Q2 2026, buying an estimated $498K and bringing the position to 31,679 shares worth $761K. The position accounts for ﹤0.01% of the portfolio, ranked #2592.

Russell Investments Group first reported a position in CSTL in Q3 2019 and has held it in 23 quarters since. The position peaked at $7.41M in Q4 2020. 70 funds tracked by Wall St. Rank hold CSTL as of Q2 2026.

  • Russell Investments Group held 31,679 shares of Castle Biosciences worth $761K as of Q2 2026.
  • Russell Investments Group bought 22,364 Castle Biosciences shares in Q2 2026, an estimated $498K.
  • Castle Biosciences made up ﹤0.01% of Russell Investments Group's portfolio in Q2 2026, its #2592 holding.
  • Russell Investments Group first reported a position in Castle Biosciences in Q3 2019 and has held it in 23 quarters since.
  • Russell Investments Group's Castle Biosciences position peaked at $7.41M in Q4 2020.
  • 70 funds tracked by Wall St. Rank held Castle Biosciences as of Q2 2026.

Based on Russell Investments Group's 13F filing for Q2 2026, filed 6 Aug 2026.