CASTLE BIOSCIENCES INC (CSTL) research

CASTLE BIOSCIENCES INC
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Sector
Health Care
Last price
$34.85
As of

CASTLE BIOSCIENCES INC (CSTL): 6 institutional managers tracked by Kresmion reported non-option positions in their 2026Q2 Form 13F filings, and the most recent SEC filing on record for the company is a Form 10-Q filed 2026-07-30.

As of . Source: SEC EDGAR filings for CSTL. Method and limitations.

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You are seeing 5 of 17 signals recorded on CSTL since 2026-05-16.

The five above all landed on 2026-09-06. The other 12 were recorded on 5 other days. 12 of the 17 are institutional flow rows, which arrive in batches on filing days.

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Largest reported share positions in CSTL (2026Q2)

Manager / securityMarket value% portfolioQoQ
RENAISSANCE TECHNOLOGIES LLCCUSIP 14843C105 · 2026Q2$8.9M0.01%,
Point72 Asset Management, L.P.CUSIP 14843C105 · 2026Q2$8.5M0.01%,
CITADEL ADVISORS LLCCUSIP 14843C105 · 2026Q2$6.3M0.00%,
MILLENNIUM MANAGEMENT LLCCUSIP 14843C105 · 2026Q2$4.9M0.00%,
D. E. Shaw & Co., Inc.CUSIP 14843C105 · 2026Q2$2.7M0.00%,
TWO SIGMA INVESTMENTS, LPCUSIP 14843C105 · 2026Q2$2.4M0.00%,

Quarterly SEC Form 13F disclosures from the managers Kresmion tracks, not a complete ownership ranking. Non-option holdings only; reported put and call positions are excluded. Different securities are labeled by CUSIP. Values are reporting-period snapshots, not current position values. Filings can arrive up to 45 days after quarter-end.

Recent SEC filings, CSTL

CSTL against its peers

CSTL's operating margin of -12.4% ranks in the 25th percentile of 25 Health Care sub-industry peers, fiscal periods ending between 2025-10-03 and 2026-05-31.

MetricCSTLPeer medianPercentilen
Revenue FY344M USD764M USD3725
Gross marginn/a54.6%n/a17
Operating margin-12.4%0.4%2525
Net margin-7.0%-2.2%4025
Return on equity-5.1%-4.7%4825
P / En/a47.2xn/a9

Peers (25): PRCT, IRMD, STAA, TDOC, GDRX, TNDM, USPH, CERT, OMDA, BVS, AMN, TALK, HSTM, CNMD, PNTG, VREX, OMCL, AHCO, ATEC, EHAB, ANGO, LMAT, NVCR, FLGT, XRAY. Fiscal periods ending between 2025-10-03 and 2026-05-31. Every figure is one full fiscal year read from one annual filing (CSTL: 10-K), reported in USD. Nothing is trailing twelve months and nothing is converted between currencies. Source: SEC EDGAR XBRL company facts (public domain); prices from Kresmion's daily equity market-data snapshot. Open the full comparison.

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