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Equibles

D. E. Shaw & Co., Inc.

Position in CSTL — Castle Biosciences Inc

CIK 1009207 New York, NY
Back to CSTL Full portfolio

Position in CSTL

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$2,690,017
-$2,513,748 QoQ
Shares Held
112,789
-46.8% QoQ
Ownership
0.369%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#44
of 176 holders
Holding Since
Jun 2020
16 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

D. E. Shaw & Co., Inc. holds $2,165,536,060 across 26 Diagnostics & Research names. CSTL ranks #22 (0.1% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 WAT
Waters Corp /De/
 948,639 $355,777,570
2 NTRA
Natera, Inc.
 1,279,255 $347,253,769
3 TMO
Thermo Fisher Scientific Inc.
 641,637 $321,691,125
4 ICLR
Icon PLC
 1,357,143 $235,749,309
5 A
Agilent Technologies, Inc.
 1,486,187 $197,410,218
6 GH
Guardant Health, Inc.
 1,255,658 $188,386,369
7 MEDP
Medpace Holdings, Inc.
 234,537 $124,208,448
8 IQV
Iqvia Holdings Inc.
 466,234 $90,085,733

All Filings in CSTL

Export CSV
16 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $2,690,017 112,789
2026-03-31 $5,203,765 211,966
2025-12-31 $6,212,680 159,709
2025-09-30 $2,108,820 92,614
2025-06-30 $3,026,039 148,190
2025-03-31 $3,787,322 189,177
2024-12-31 $2,413,503 90,563
2024-03-31 $296,411 13,382
2023-12-31 $1,130,015 52,364
2022-12-31 $681,176 28,937
2022-09-30 $718,034 27,532
2021-09-30 $472,416 7,104
2021-03-31 $1,311,214 19,153
2020-12-31 $1,281,826 19,089
2020-09-30 $442,315 8,597
2020-06-30 $657,728 17,451