CASTLE BIOSCIENCES INC

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CSTL·14843C105·US·Common Stock·Healthcare - Diagnostics & Research-13D/G

CSTL (CASTLE BIOSCIENCES INC) is held by 108 institutional investors as of Q2 2026. Largest holders: BlackRock, Inc. ($78.5M), RTW INVESTMENTS, LP ($66.3M), PRINCIPAL FINANCIAL GROUP INC ($41.2M). Net institutional sentiment: Mixed.

108

Holders

(7 Elite)

$544.2M

Total Value

61% (111)

Consensus

68 buying - 43 selling

13F: Jun 30, 2026Insider & Congress: Updated regularly

Smart Money Verdict

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Institutional (13F)52

Insider (Form 4)33

Activist (13D/13G)36

Congressional (STOCK Act)72

Holder Quality

81

★★★★★

Elite

77

★★★★

Strong

89

★★★

Solid

47

★★

Below

78

★

Weak

Held by 108 funds

7 elite

Who's Trading

Source dates: Price Oct 9, 2026 · Insiders Oct 7, 2026 · Activists May 15, 2026 · Congress none

InsiderMJMAETZOLD DEREK JSell $114KOct 5, 2026

InsiderMJMAETZOLD DEREK JExercise 8K shOct 5, 2026

InsiderMJMAETZOLD DEREK JSell $305KOct 5, 2026

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Top Holders

Top Holders (108)History

AllNewIncreasedHeldDecreasedExitedFirst report

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Fund	Action	Shares	Value	Weight	Est. P&L	Conviction
BlackRock, Inc.	Increased	3.3M(+10.4%)	$78.5M	0.0%	+32.75%	33
RTW INVESTMENTS, LP	Increased	2.8M(+0.7%)	$66.3M	0.6%	-5.65%	42
PRINCIPAL FINANCIAL GROUP INC	Decreased	1.7M(-2.4%)	$41.2M	0.0%	+34.06%	0
VAVANGUARD CAPITAL MANAGEMENT LLC	Increased	1.2M(+4.2%)	$29.3M	0.0%	+25.52%	30
Allianz Asset Management GmbH	Increased	879,258(+8.4%)	$21M	0.0%	+42.41%	31
VPVANGUARD PORTFOLIO MANAGEMENT LLC	Decreased	840,785(-2.4%)	$20.1M	0.0%	+24.85%	0
STATE STREET CORP	Increased	822,079(+6.9%)	$19.6M	0.0%	+50.28%	30
GEODE CAPITAL MANAGEMENT, LLC	Increased	795,912(+9.3%)	$19M	0.0%	-7.04%	31
MACKENZIE FINANCIAL CORP	Increased	793,507(+970.7%)	$18.9M	0.0%	+41.28%	46
DIMENSIONAL FUND ADVISORS LP	Decreased	791,085(-23.9%)	$18.9M	0.0%	+56.68%	0
Jefferies Financial Group Inc.	New	647,391	$15.4M	0.1%	+44.32%	47
Qube Research & Technologies Ltd	Increased	589,300(+5.3%)	$14.1M	0.0%	+28.82%	30
RENAISSANCE TECHNOLOGIES LLC	Decreased	371,200(-30.3%)	$8.9M	0.0%	+41.33%	0
GOLDMAN SACHS GROUP INC	Increased	358,397(+5.0%)	$8.5M	0.0%	+40.44%	29
Point72 Asset Management, L.P.	New	357,317	$8.5M	0.0%	+44.32%	38
Connor, Clark & Lunn Investment Management Ltd.	Decreased	331,727(-12.0%)	$7.9M	0.0%	+36.14%	0
MORGAN STANLEY	Decreased	329,684(-23.1%)	$7.9M	0.0%	+34.50%	0
PANAGORA ASSET MANAGEMENT INC	Increased	301,040(+35.4%)	$7.2M	0.0%	+26.61%	35
Allspring Global Investments Holdings, LLC	Increased	292,470(+82.0%)	$7M	0.0%	+56.53%	42
NORTHERN TRUST CORP	Increased	285,158(+4.4%)	$6.8M	0.0%	-3.54%	29

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CSTLCASTLE BIOSCIENCES INC

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High Conviction Moves-Smart Money Convergence-Fund Consensus-Double-Down Detection

Data sourced from four public-disclosure sources: SEC 13F, Form 4, 13D/13G, and House/Senate STOCK Act disclosures. Not financial advice. Full disclaimer