CSTL

Castle Biosciences INC

-$382.8M

Net Activity

Institutions Holding

186

Popularity Rank

#3079

Avg Weight

0.05%

Total Value

$676.2M

Ownership Trend

186 institutions currently hold CSTL, with 93 net buyers and 100 net sellers this quarter.

Institutional Moves

Institutional Moves (Q1 2026)

Neutral

Based on recent trading activity

Net Selling Institutions

100

Net Buying Institutions

93

Key Holders

Key Holders

Top 5 by Value

BI
BlackRock, Inc.
$73.2M
RI
Rtw Investments, LP
$67.7M
PF
Principal Financial Group INC
$43.5M
PC
Portolan Capital Management, LLC
$33.1M
VC
Vanguard Capital Management LLC
$28.9M

Top 5 by Conviction

AC
AIGH Capital Management LLC
1.98%
PC
Portolan Capital Management, LLC
1.76%
RI
Rtw Investments, LP
0.67%
SP
Summit Partners Public Asset Management, LLC
0.62%
PC
Palisade Capital Management, LP
0.44%
View all 186 holding institutions

Quarterly Activity

Recent Activity

+$298.0M

Total Buy Value

$623.0M

Total Sell Value

New buy22
Trim63
Add71
Sold out37

93

Net Buyers

100

Net Sellers

Insider Trading (Form 4)

Form 144 Pre-Sale Notices

2

Filings (90d)

$1.21M

Total Est. Value

54K shares

Planned Shares

Last Filed 2026-07-01
FilerFiling DateEst. Value
Derek Maetzold2026-07-01$589K
Oelschlager Kristen M2026-06-16$618K

Form 144 is a planned sale notice, not an executed transaction. Form 144 Tracker。

Beneficial Ownership (13D/13G)

No Schedule 13D/13G filings for this ticker

Material Events (8-K)

No Form 8-K filings for this ticker

FAQ

Who are the top institutional investors holding CASTLE BIOSCIENCES INC (CSTL)?
Major stakeholders currently include BlackRock, Inc. ($73.2M), Rtw Investments, LP ($67.7M), Principal Financial Group INC ($43.5M). Based on the latest 13F filings, there are a total of 186 tracked investment funds and institutions maintaining positions in CSTL.
What is the overall institutional sentiment toward CSTL recently?
Institutional sentiment appears Bearish (Net Selling). During the most recent reporting quarter, the stock experienced a net outflow of $382.8M, driven by 93 managers accumulating shares while 100 reduced their exposure.
Which institutions have been selling or reducing their CSTL positions?
In the latest period, 63 funds trimmed their holdings, and 37 managers completely exited their positions. The aggregate reported sell value was $623.0M.
Are there any notable investors adding CSTL to their portfolios?
Yes, buying activity remains notable. 22 institutions opened new positions in {ticker}, and 71 existing holders added to their shares. The total reported buy value for the quarter amounted to $298.0M.

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