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Equibles

ALLIANCEBERNSTEIN L.P.

Position in CSTL — Castle Biosciences Inc

CIK 1109448 NASHVILLE, TN
Back to CSTL Full portfolio

Position in CSTL

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$646,335
+$25,957 QoQ
Shares Held
27,100
+7.2% QoQ
Ownership
0.089%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#80
of 176 holders
Holding Since
Jun 2020
25 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in CSTL Over Time

Shares Held

Position Value (USD)

Position in Diagnostics & Research

Healthcare · as of Jun 30, 2026

ALLIANCEBERNSTEIN L.P. holds $4,501,940,525 across 31 Diagnostics & Research names. CSTL ranks #28 (0.0% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 WAT
Waters Corp /De/
 2,694,590 $1,010,579,033
2 TMO
Thermo Fisher Scientific Inc.
 1,849,037 $927,033,190
3 MTD
Mettler Toledo International Inc/
 679,101 $867,558,318
4 IQV
Iqvia Holdings Inc.
 1,643,102 $317,480,168
5 ICLR
Icon PLC
 1,378,196 $239,406,427
6 GH
Guardant Health, Inc.
 1,395,240 $209,327,857
7 ILMN
Illumina, Inc.
 881,041 $154,913,439
8 DGX
Quest Diagnostics Inc
 625,894 $132,658,233

All Filings in CSTL

Export CSV
25 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $646,335 27,100
2026-03-31 $620,378 25,270
2025-12-31 $983,003 25,270
2025-09-30 $759,834 33,370
2025-06-30 $681,415 33,370
2025-03-31 $668,067 33,370
2024-12-31 $889,310 33,370
2024-09-30 $951,712 33,370
2024-06-30 $726,464 33,370
2024-03-31 $739,145 33,370
2023-12-31 $964,410 44,690
2023-09-30 $754,814 44,690
2023-06-30 $613,146 44,690
2023-03-31 $511,200 22,500
2022-12-31 $529,650 22,500
2022-09-30 $586,800 22,500
2022-06-30 $958,907 43,686
2022-03-31 $1,112,528 24,800
2021-12-31 $1,058,889 24,700
2021-09-30 $1,642,550 24,700
2021-06-30 $1,855,249 25,300
2021-03-31 $896,826 13,100
2020-12-31 $725,220 10,800
2020-09-30 $653,415 12,700
2020-06-30 $508,815 13,500