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  4. [144] CASTLE BIOSCIENCES INC SEC Filing

Castle Biosciences (CSTL) officer plans $841K stock sale

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
144

Rhea-AI Filing Summary

CASTLE BIOSCIENCES INC (CSTL) received a Rule 144 notice indicating a proposed sale of common stock for the account of officer Kristen M. Oelschlager, with J.P. Morgan Securities LLC acting as agent and attorney-in-fact. The filing covers a proposed sale of 24,602 shares of common stock, with an indicated aggregate market value of $841,388.40. The notice states that the shares are held by The Fritz Shorter Trust, with Kristen and Michael Oelschlager as trustees, and were associated with an account retitled into the trust name on March 19, 2025. The issuer reports 30,549,507 shares of common stock outstanding as of the filing context.

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Shares proposed to be sold 24,602 shares of common stock Number of shares covered by the Rule 144 notice
Aggregate market value $841,388.40 Aggregate market value of the 24,602 shares proposed to be sold
Shares outstanding 30,549,507 shares Common stock outstanding for CASTLE BIOSCIENCES INC as reported in the notice
Shares associated with retitled account 96,322 shares Shares linked to the account retitled into trust name on March 19, 2025
Date of Notice 08/24/2026 Date the Rule 144 notice was signed by J.P. Morgan Securities LLC
Rule 144 regulatory
"See the definition of "person" in paragraph (a) of Rule 144."
Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.
aggregate market value financial
"Common Stock | ... | 24602 | 841388.4 | 30549507 | 08/24/2026"
Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.
attorney-in-fact regulatory
"J.P. Morgan Securities LLC as agent and attorney-in-fact for Kristen M. Oelschlager."
An attorney-in-fact is the person or entity given legal authority through a power of attorney to act on behalf of another for specific tasks, such as signing documents, voting shares, or handling transactions. For investors, this matters because it lets a trusted representative make timely decisions or complete paperwork when the owner cannot, much like handing keys to someone to run errands on your behalf—so checks on scope and limits of that authority are important.
trustees financial
"The shares represented on this filing are being sold by The Fritz Shorter Trust, Kristen & Michael Oelschlager, trustees"
Trustees are people or a small group legally appointed to hold and manage assets, documents, or obligations on behalf of others and must act in those beneficiaries’ best interests. Think of them as a neutral guardian or custodian who enforces rules, protects assets, and makes decisions that can affect payments, corporate governance, or recovery in a default — all of which directly influence investor returns and risk.

FAQ

What does the Form 144 filing disclose for CSTL?
It discloses that an affiliate of CASTLE BIOSCIENCES INC (CSTL), officer Kristen M. Oelschlager, has filed a Rule 144 notice for a proposed sale of 24,602 shares of common stock, with J.P. Morgan Securities LLC acting as agent and attorney-in-fact.

How many CSTL shares are proposed to be sold under this Form 144?
The notice covers a proposed sale of 24,602 shares of CASTLE BIOSCIENCES INC common stock, with an indicated aggregate market value of $841,388.40 based on the information in the filing.

Which broker is handling the proposed CSTL Rule 144 sale?
The proposed sale is to be handled through J.P. Morgan Securities LLC, which signs the notice as agent and attorney-in-fact for Kristen M. Oelschlager.

How many CSTL shares are reported as outstanding in this filing?
The issuer reports 30,549,507 shares of CASTLE BIOSCIENCES INC common stock outstanding in connection with this Form 144 notice, providing context for the size of the proposed sale.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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144: Filer Information

144: Issuer Information

144: Securities Information



Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold


* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.



Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

144: Remarks and Signature

Source: View Original Filing on SEC EDGAR