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Who Owns Castle Biosciences Inc

Every manager with more than $100m in listed equities files a 13F each quarter naming what they hold. These are the ones reporting a position in Castle Biosciences Inc.

Who crossed 5% of CSTL →
Managers holding
4
as of 2026-09-30
Reported value
$557.7K
summed across filings
Shares held
15.7K
Added vs trimmed
2 / 1
since each filer's last quarter

Positions as of 2026-09-30

Largest first. The move is against the previous quarter that manager filed, not the previous calendar quarter.

ManagerValue
Green Alpha Advisors, LLCCOM13.8K shadded$491.3K
Farther Finance Advisors, LLCStock1.6K shtrimmed$58K
GK Wealth Management LLCCOM214 sh—$7.6K
GAMMA Investing LLCCommon Stock22 shadded$782

Source: quarterly 13F filings, via EDGAR. A 13F reports positions by CUSIP alone; each CUSIP here has been confirmed against OpenFIGI rather than matched by name, because a name match would attribute one company's shareholders to another. Positions are as of quarter end and can be months old by the time they are filed, and 13F covers long equity positions only — not shorts, and not most debt. The summed value is what these filers reported, not the company's institutional ownership.

More on CSTL

Company overviewEverything on CSTL in one place, with the price.SEC filingsWhat CSTL's 8-Ks say happened: results, departures, auditor changes.Insider tradingWhat CSTL's own officers and directors buy and sell.Planned salesSales CSTL insiders have filed notice of.Executive payWhat CSTL awarded its chief executive, and what it became.Funds holding itWhich funds and ETFs hold CSTL, and how big a bet.LobbyingWhat CSTL spends lobbying Congress, and on what.Who lobbies for itThe lobbyists on CSTL's account, and who they worked for.Federal contractsWhat federal agencies pay CSTL.PatentsWhat CSTL is filing at the patent office.

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