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SEC Form 4 research

CASTLE BIOSCIENCES INC insider transactions

Inspect CASTLE BIOSCIENCES INC's public SEC insider acquisitions and sales, reporting owners and source receipts.

As of 2026-10-14T07:26:40.310Z

Issuer CIK
0001447362
Reporting owners
25
Officers and directors
10
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What is a Form 4?

Animation: what a Form 4 is, shown with one real example. Sonic Automotive (SAH) reporting owner Paul P. Rusnak bought 13,701 shares at $59.78 on Wednesday, October 7, 2026, transaction code P, an open-market purchase (S is a sale and A is an award from the company). A timeline marks the SEC's two-business-day filing deadline, which ends Friday, October 9. The SEC accepted the Form 4 at 4:33:21 PM ET on October 9, and NexusTrade treats it as public one minute later, at 4:34:21 PM ET. A lamp for NexusTrade's InsiderTrades indicator stays off from the trade date until that moment, then counts one purchase worth 13,701 × $59.78 = $819,045.78.
In this example the shares were bought on Oct 7, 2026, and NexusTrade's InsiderTrades indicator can count the purchase starting at 4:34:21 PM ET on Oct 9, one minute after the SEC accepted the Form 4.

A Form 4 is the SEC filing a company insider, such as an officer, director or 10% owner, uses to report a trade in the company's stock, generally within two business days. The animation follows one real filing as an example: Paul P. Rusnak's purchase of Sonic Automotive (SAH) shares on October 7, 2026.

The same reading applies to every row on this page. The trade date is when the shares changed hands. The available date is when NexusTrade treats the filing as public, and a NexusTrade InsiderTrades indicator counts a purchase (code P) or sale (code S) only from that moment. Code A awards are not counted as purchases.

Read one actual disclosure before using it

Show the table · 1 row, 7 columns

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2026-10-072026-10-05MAETZOLD DEREK JS2,718$35.57Not reported

First displayed source row from Recent insider disclosures. The full bounded history and coverage notes remain below.

The displayed observation date is 2026-10-05 and its public availability date is 2026-10-07. 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 accession 0001628280-26-065327 ↗SEC accession 0001628280-26-065327 ↗SEC accession 0001628280-26-065327 ↗

Recent insider disclosures

Inspect all 50 displayed rows: Recent insider disclosures

This table includes purchases, sales and awards in the public filing record. Awards and open-market purchases are distinct transaction codes. For historical research, use the public availability date to determine when the transaction was knowable.

Read code P as a purchase, S as a sale and A as an award. An award is an acquisition, but it is not an open-market purchase. Open the filing receipt to check the transaction details.

Scroll sideways to compare all columns. Select a heading to sort.

2026-10-072026-10-05MAETZOLD DEREK JS2,718$35.57Not reported
2026-10-072026-10-05MAETZOLD DEREK JS3,198$35.57Not reported
2026-10-072026-10-05MAETZOLD DEREK JS8,580$35.57Not reported
2026-10-052026-10-01Oelschlager Kristen MS1,346$36.38Not reported
2026-10-052026-10-01Oelschlager Kristen MS2,807$35.75Not reported
2026-10-012026-09-30Juvenal Tobin WS1,034$34.2Not reported
2026-10-012026-09-29Juvenal Tobin WS5,543$35.5Not reported
2026-09-232026-09-21MAETZOLD DEREK JS2,718$35.33Not reported
2026-09-232026-09-21MAETZOLD DEREK JS3,198$35.33Not reported
2026-09-232026-09-21MAETZOLD DEREK JS8,580$35.33Not reported
2026-09-162026-09-15Juvenal Tobin WS3,294$35.14Not reported
2026-09-162026-09-14Juvenal Tobin WS3,306$32.32Not reported
2026-09-152026-09-11MAETZOLD DEREK JS71$32.78Not reported
2026-09-152026-09-11MAETZOLD DEREK JS83$32.78Not reported
2026-09-152026-09-11MAETZOLD DEREK JS223$32.78Not reported
2026-09-152026-09-11MAETZOLD DEREK JS2,656$32Not reported
2026-09-152026-09-11MAETZOLD DEREK JS3,124$32Not reported
2026-09-152026-09-11MAETZOLD DEREK JS8,361$32Not reported
2026-09-042026-09-01Oelschlager Kristen MS200$34.02Not reported
2026-09-042026-09-01Oelschlager Kristen MS3,952$33.36Not reported
2026-09-032026-08-31Juvenal Tobin WS1,730$32.81Not reported
2026-09-022026-08-28MAETZOLD DEREK JS21$33.88Not reported
2026-09-022026-08-28MAETZOLD DEREK JS21$33.88Not reported
2026-09-022026-08-28MAETZOLD DEREK JS21$33.88Not reported
2026-09-022026-08-28MAETZOLD DEREK JS21$33.88Not reported
2026-09-022026-08-28MAETZOLD DEREK JS177$33.88Not reported
2026-09-022026-08-28MAETZOLD DEREK JS209$33.88Not reported
2026-09-022026-08-28MAETZOLD DEREK JS956$33.88Not reported
2026-09-022026-08-28MAETZOLD DEREK JS257$33.14Not reported
2026-09-022026-08-28MAETZOLD DEREK JS257$33.14Not reported
2026-09-022026-08-28MAETZOLD DEREK JS257$33.14Not reported
2026-09-022026-08-28MAETZOLD DEREK JS257$33.14Not reported
2026-09-022026-08-28MAETZOLD DEREK JS2,129$33.14Not reported
2026-09-022026-08-28MAETZOLD DEREK JS2,505$33.14Not reported
2026-09-022026-08-28MAETZOLD DEREK JS11,472$33.14Not reported
2026-08-282026-08-25Juvenal Tobin WS9,050$35.04Not reported
2026-08-272026-08-25Oelschlager Kristen MS5,223$34.64Not reported
2026-08-272026-08-25Oelschlager Kristen MS7,161$34.26Not reported
2026-08-272026-08-24Oelschlager Kristen MS12,218$33.69Not reported
2026-08-202026-08-17Juvenal Tobin WS1,730$29.59Not reported
2026-08-192026-08-14Stokes FrankS24,908$29.77Not reported
2026-08-192026-08-14MAETZOLD DEREK JS278$30.02Not reported
2026-08-192026-08-14MAETZOLD DEREK JS278$30.02Not reported
2026-08-192026-08-14MAETZOLD DEREK JS278$30.02Not reported
2026-08-192026-08-14MAETZOLD DEREK JS278$30.02Not reported
2026-08-192026-08-14MAETZOLD DEREK JS2,306$30.02Not reported
2026-08-192026-08-14MAETZOLD DEREK JS2,714$30.02Not reported
2026-08-192026-08-14MAETZOLD DEREK JS1,100$30.02Not reported
2026-08-072025-11-24Juvenal Tobin WS1,301$38.39Not reported
2026-08-072026-08-05MAETZOLD DEREK JS473$30.68Not reported

Most recent 90-day source activity, up to 50 rows. No rows means no matching recent records, not no historical activity.

Officers and directors in the directory

Inspect all 13 displayed rows: Officers and directors in the directory

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Goldberg Ellen00018671002
Olson Tiffany00014421723
Aspinall Mara G.00016230498
Stokes Frank000178281534
0001782994000178299412
Anderson Bonnie H000158897080
BRADBURY DANIEL0001236397676
Cole G Bradley0001337798168
Cook Joseph C. III0001783205138
Juvenal Tobin W000185654221
KABAKOFF DAVID S000102400843
MAETZOLD DEREK J00012395011,600
Oelschlager Kristen M000185656526
Goldberg Ellen ↗Olson Tiffany ↗Aspinall Mara G. ↗Stokes Frank ↗0001782994 ↗Anderson Bonnie H ↗BRADBURY DANIEL ↗Cole G Bradley ↗Cook Joseph C. III ↗Juvenal Tobin W ↗KABAKOFF DAVID S ↗MAETZOLD DEREK J ↗Oelschlager Kristen M ↗

Which transactions qualify for the company tracker

The company strategy uses verified officers and directors with qualifying acquisitions at this issuer. Other reporting owners may appear in source records without becoming strategy signals.

Strategy eligibility is held while filing coverage is unresolved.

Historical follower simulations are separate from these source transactions. They do not establish live trading results.