Transaction · 0001628280-26-060430

Oelschlager Kristen M

Oelschlager Kristen M, COO, reported an open-market or private sale at CASTLE BIOSCIENCES INC involving 3952.000000 shares for an estimated $131838.72. Reported holdings after the transaction were 13556.000000 shares. The stored filing text includes a detected 10b5-1 reference.

Open-market sellSEC transaction code SCOO
CSTLCASTLE BIOSCIENCES INC
Trade date
Sep 01, 2026
Filing date
Sep 03, 2026
View on SEC Insider profile
Estimated value-$131kShares × reported price
Shares traded3.95k$33.36 per share
Holdings after13.5kDirect
% of reported position traded22.57%This security and ownership context
How reported position traded is calculated

Shares sold ÷ (holdings after + shares sold). Estimated position before: 17,508 shares.

Row-level estimate for this security and ownership context, not the insider’s complete portfolio. Joint ownership, other transactions in the filing, amendments and footnotes can affect interpretation.

CSTL price since this filing

Daily closing prices, with the filing date and available return windows
CSTL · Daily closing priceLoading daily prices…
Filing dateReturn windows appear as prices become available.
Pre-filing1mo ago -14.2%1w ago +5.2%1d ago +1.2%
Returns since7d -1.0%30d +8.9%90d180d1y

Transaction facts

Stored Form 4 columns with their raw values

Non-derivative
Type
Sell
Code S
Identifier
0001628280-26-060430
Common Stock
Transaction date
Sep 01, 2026
Filed Sep 03, 2026, 08:07 PM · 2d delay
Shares
3,952 sh
$33.36 per share
Estimated value
-$131k
Computed from shares × price
Holdings after
13,556 sh
Direct

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $100kLarge $1.00M
Cluster Selling Direct Ownership Large Holdings Reduction Repeat Seller 10b5-1 Detected
Filing-only score

0 points

Compact filing score computed from stored Form 4 facts. Version v1.

Neutral filing signal

This filing is broadly neutral on the filing-only scale. The Form 4 facts do not strongly tilt positive or negative.

How this score is calculated
  • direct_ownership+6 points

    direct_or_indirect_ownership = D

    Direct ownership reports the insider's personal stake.
  • timely_filing+4 points

    reporting_delay_days = 2

    Filing reported within two business days of the transaction.
  • tenb5_1_detected-10 points

    is_10b5_1 = true

    Stored filing content includes detected 10b5-1 language.
Read the scoring methodology

Signed filing-only points, not a probability or expected return. Version v1.

Reported relationships & other filings

Form 4 relationship flags and nearby filing context

Reported roles

Chief Operating Officer

Officer YesDirector No10% NoOther No
Footnotes & amended
  1. F1

    These transactions were made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person, on March 17, 2026.

  2. F2

    Includes 68 shares acquired on August 31, 2026, under the Issuer's employee stock purchase plan.

  3. F3

    This transaction was executed in multiple trades at prices ranging from $33.015 to $33.900, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby un…

  4. F4

    Held by the Fritz Shorter Trust of which the Reporting Person and her spouse are the trustees and beneficiaries.

  5. F5

    The shares subject to the option are fully vested.

Original filing · 0001628280-26-060430
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