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Public ownership evidence

Castle Biosciences, Inc. Common Stock (CSTL) Ownership Disclosures

Read CSTL insider transactions, institutional 13F filings and Congressional disclosures with report dates, public availability and original receipts.

As of 2026-11-07T14:03:26.246Z

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2026-11-042026-11-02MAETZOLD DEREK JS325Not reported

First displayed source row from Recent Form 4 activity. The full bounded history and coverage notes remain below.

The displayed observation date is 2026-11-02 and its public availability date is 2026-11-04. Subtracting those calendar dates gives 2 days of disclosure lag. Historical public research can use the record from the availability date, rather than backdating knowledge to the observation date. The calendar-day difference does not assert an intraday publication time.

This row is code S: a sale. A purchase-following rule excludes this sale even if the reported dollar amount is large.

Open the linked original receipts to verify the row, then inspect a second record before drawing a pattern. This public filing observation supplies source evidence, not a completed copy-trading return.

SEC 0001628280-26-070131 ↗SEC 0001628280-26-070131 ↗SEC 0001628280-26-070131 ↗

Recent Form 4 activity

Inspect all 50 displayed rows: Recent Form 4 activity

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2026-11-042026-11-02MAETZOLD DEREK JS325Not reported
2026-11-042026-11-02MAETZOLD DEREK JS382Not reported
2026-11-042026-11-02MAETZOLD DEREK JS1,025Not reported
2026-11-042026-11-02MAETZOLD DEREK JS2,393Not reported
2026-11-042026-11-02MAETZOLD DEREK JS2,816Not reported
2026-11-042026-11-02MAETZOLD DEREK JS7,555Not reported
2026-10-302026-10-28Juvenal Tobin WS5,341Not reported
2026-10-302026-10-28Juvenal Tobin WS1,237Not reported
2026-10-282026-10-26Juvenal Tobin WS3,288Not reported
2026-10-212026-10-19MAETZOLD DEREK JS2,718Not reported
2026-10-212026-10-19MAETZOLD DEREK JS3,198Not reported
2026-10-212026-10-19MAETZOLD DEREK JS8,580Not reported
2026-10-142026-10-12Juvenal Tobin WS3,288Not reported
2026-10-072026-10-05MAETZOLD DEREK JS2,718Not reported
2026-10-072026-10-05MAETZOLD DEREK JS3,198Not reported
2026-10-072026-10-05MAETZOLD DEREK JS8,580Not reported
2026-10-052026-10-01Oelschlager Kristen MS1,346Not reported
2026-10-052026-10-01Oelschlager Kristen MS2,807Not reported
2026-10-012026-09-30Juvenal Tobin WS1,034Not reported
2026-10-012026-09-29Juvenal Tobin WS5,543Not reported
2026-09-232026-09-21MAETZOLD DEREK JS2,718Not reported
2026-09-232026-09-21MAETZOLD DEREK JS3,198Not reported
2026-09-232026-09-21MAETZOLD DEREK JS8,580Not reported
2026-09-162026-09-15Juvenal Tobin WS3,294Not reported
2026-09-162026-09-14Juvenal Tobin WS3,306Not reported
2026-09-152026-09-11MAETZOLD DEREK JS71Not reported
2026-09-152026-09-11MAETZOLD DEREK JS83Not reported
2026-09-152026-09-11MAETZOLD DEREK JS223Not reported
2026-09-152026-09-11MAETZOLD DEREK JS2,656Not reported
2026-09-152026-09-11MAETZOLD DEREK JS3,124Not reported
2026-09-152026-09-11MAETZOLD DEREK JS8,361Not reported
2026-09-042026-09-01Oelschlager Kristen MS200Not reported
2026-09-042026-09-01Oelschlager Kristen MS3,952Not reported
2026-09-032026-08-31Juvenal Tobin WS1,730Not reported
2026-09-022026-08-28MAETZOLD DEREK JS21Not reported
2026-09-022026-08-28MAETZOLD DEREK JS21Not reported
2026-09-022026-08-28MAETZOLD DEREK JS21Not reported
2026-09-022026-08-28MAETZOLD DEREK JS21Not reported
2026-09-022026-08-28MAETZOLD DEREK JS177Not reported
2026-09-022026-08-28MAETZOLD DEREK JS209Not reported
2026-09-022026-08-28MAETZOLD DEREK JS956Not reported
2026-09-022026-08-28MAETZOLD DEREK JS257Not reported
2026-09-022026-08-28MAETZOLD DEREK JS257Not reported
2026-09-022026-08-28MAETZOLD DEREK JS257Not reported
2026-09-022026-08-28MAETZOLD DEREK JS257Not reported
2026-09-022026-08-28MAETZOLD DEREK JS2,129Not reported
2026-09-022026-08-28MAETZOLD DEREK JS2,505Not reported
2026-09-022026-08-28MAETZOLD DEREK JS11,472Not reported
2026-08-282026-08-25Juvenal Tobin WS9,050Not reported
2026-08-272026-08-25Oelschlager Kristen MS5,223Not reported

90-day public availability window, up to 50 records.

Recent institutional filing receipts

Inspect all 50 displayed rows: Recent institutional filing receipts

These are raw ticker-matched positions in recent 13F receipts, including amendments. They are not deduplicated current ownership totals. Open the manager profile to inspect its effective filing book.

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CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-2537,802$901,578None
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-25901,578$37,802,000None
Empowered Funds, LLC2026-06-302026-08-18142,338$3,394,761None
Jefferies Financial Group Inc.2026-06-302026-08-18647,391$15,440,275None
Investors Portfolio Services LLC2026-06-302026-08-1518$429None
SummitTX Capital, L.P.2026-06-302026-08-1579,018$1,884,579None
SEI INVESTMENTS CO2026-06-302026-08-1574,267$1,771,268None
SEI INVESTMENTS CO2026-06-302026-08-15166$3,970None
XTX Topco Ltd2026-06-302026-08-1539,923$952,164None
CHARLES SCHWAB INVESTMENT MANAGEMENT INC2026-06-302026-08-15254,535$6,070,660None
Sixth Street Partners Management Company, L.P.2026-06-302026-08-15254,535$6,070,660None
Qube Research & Technologies Ltd2026-06-302026-08-15589,300$14,054,805None
OSAIC HOLDINGS, INC.2026-06-302026-08-15800$19,080None
OSAIC HOLDINGS, INC.2026-06-302026-08-15391$9,325None
Schonfeld Strategic Advisors LLC2026-06-302026-08-1519,930$475,330None
Man Group plc2026-06-302026-08-15108,761$2,593,950None
Trexquant Investment LP2026-06-302026-08-15206,111$4,915,747None
MetLife Investment Management, LLC2026-06-302026-08-1517,008$405,641None
Engineers Gate Manager LP2026-06-302026-08-1529,480$703,098None
Birchview Capital, LP2026-06-302026-08-1512,984$309,668None
JANE STREET GROUP, LLC2026-06-302026-08-155,098$121,587None
JANE STREET GROUP, LLC2026-06-302026-08-1539,695$946,726None
Orion Porfolio Solutions, LLC2026-06-302026-08-1569,654$1,661,248None
Legal & General Group Plc2026-06-302026-08-1513,135$313,271None
Legal & General Group Plc2026-06-302026-08-154,508$107,516None
Legal & General Group Plc2026-06-302026-08-152,905$69,284None
RTW INVESTMENTS, LP2026-06-302026-08-152,778,335$66,263,290None
HRT FINANCIAL LP2026-06-302026-08-15115,853$2,763,000None
Parkman Healthcare Partners LLC2026-06-302026-08-15144,791$3,453,265None
MILLENNIUM MANAGEMENT LLC2026-06-302026-08-15205,369$4,898,051None
Numerai GP LLC2026-06-302026-08-1510,348$246,800None
Allianz Asset Management GmbH2026-06-302026-08-1516,034$393,635None
Allianz Asset Management GmbH2026-06-302026-08-15753$18,486None
Allianz Asset Management GmbH2026-06-302026-08-15794,395$19,502,397None
Allianz Asset Management GmbH2026-06-302026-08-15142$3,486None
SILVERCREST ASSET MANAGEMENT GROUP LLC2026-06-302026-08-15256,095$6,107,866None
JONES FINANCIAL COMPANIES LLLP2026-06-302026-08-15343$8,335None
Freestone Grove Partners LP2026-06-302026-08-151$24None
SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC2026-06-302026-08-15824,872$19,673,197None
AQR CAPITAL MANAGEMENT LLC2026-06-302026-08-15391$9,325None
AQR CAPITAL MANAGEMENT LLC2026-06-302026-08-15524$12,497None
AQR CAPITAL MANAGEMENT LLC2026-06-302026-08-156$143None
AQR CAPITAL MANAGEMENT LLC2026-06-302026-08-15165,590$3,949,322None
AQR CAPITAL MANAGEMENT LLC2026-06-302026-08-1556$1,336None
MANUFACTURERS LIFE INSURANCE COMPANY, THE2026-06-302026-08-1512,543$299,151None
ROYAL BANK OF CANADA2026-06-302026-08-1578$2,000None
ROYAL BANK OF CANADA2026-06-302026-08-15897$21,000None
ALLIANCEBERNSTEIN L.P.2026-06-302026-08-1527,100$665,305None
BRIDGEWAY CAPITAL MANAGEMENT, LLC2026-06-302026-08-15221,338$5,278,911None
D. E. Shaw & Co., Inc.2026-06-302026-08-15112,789$2,690,018None

90-day public filing window, up to 50 source positions.

CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM ↗CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM ↗Empowered Funds, LLC ↗Jefferies Financial Group Inc. ↗Investors Portfolio Services LLC ↗SummitTX Capital, L.P. ↗SEI INVESTMENTS CO ↗SEI INVESTMENTS CO ↗XTX Topco Ltd ↗CHARLES SCHWAB INVESTMENT MANAGEMENT INC ↗

Recent Congressional disclosures

No matching Congressional transactions were returned in this source preview.

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Bounded public source preview, up to 25 disclosed events.

How to read the disclosure dates

The tables report different things: insider transactions, institutional positions and Congressional transaction ranges. Read each table with its source dates and units. They cannot be added into a combined ownership percentage.

  1. Company insiders

    SEC Form 4 purchases, sales and awards report transactions and their public filing availability.

  2. Institutional managers

    13F reports disclose delayed quarter-end positions. They are not a record of trades between quarters.

  3. Congressional filers

    Periodic transaction reports disclose transaction dates and amount brackets. Public filing dates determine what researchers could know.

Institutional source directory ↗Congressional source directory ↗

Read the transaction codes

Awards use transaction code A, purchases P and sales S. An acquisition from an award is not the same as an open-market purchase. Joint filers may share a transaction. Use original receipts and availability dates to interpret the events.