CSTL insider trades & Congress trades
Castle Biosciences Inc: public insider filings and Congress disclosures, in one place.
Bourse has recorded 61 open-market insider transactions in Castle Biosciences Inc (CSTL) (0 purchases with code P and 61 sales with code S), the most recent on November 2, 2026.
In the last 90 days: 0 purchases by 0 insiders ($0) and 52 sales by 4 ($6.47M).
Insider transactions
SEC Form 4, open-market purchases (P) and sales (S) only. Awards, option exercises and tax withholding are excluded. “After” shows the stock’s return over the month following the trade, where available.
| Date | Insider | Role | Type | Shares | Price | Value | After 1M |
|---|---|---|---|---|---|---|---|
| Nov 2, 2026 | Maetzold Derek J | Pres. & Chief Exec. Officer | Sell | 7,555 | $36.01 | $272K | – |
| Nov 2, 2026 | Maetzold Derek J | Pres. & Chief Exec. Officer | Sell | 2,816 | $36.01 | $101K | – |
| Nov 2, 2026 | Maetzold Derek J | Pres. & Chief Exec. Officer | Sell | 2,393 | $36.01 | $86K | – |
| Nov 2, 2026 | Maetzold Derek J | Pres. & Chief Exec. Officer | Sell | 1,025 | $36.81 | $38K | – |
| Nov 2, 2026 | Maetzold Derek J | Pres. & Chief Exec. Officer | Sell | 382 | $36.81 | $14K | – |
| Nov 2, 2026 | Maetzold Derek J | Pres. & Chief Exec. Officer | Sell | 325 | $36.81 | $12K | – |
| Oct 28, 2026 | Juvenal Tobin W | Chief Commercial Officer | Sell | 1,237 | $35.58 | $44K | – |
| Oct 28, 2026 | Juvenal Tobin W | Chief Commercial Officer | Sell | 5,341 | $36.62 | $196K | – |
| Oct 26, 2026 | Juvenal Tobin W | Chief Commercial Officer | Sell | 3,288 | $33.08 | $109K | – |
| Oct 19, 2026 | Maetzold Derek J | Pres. & Chief Exec. Officer | Sell | 8,580 | $31.91 | $274K | – |
| Oct 19, 2026 | Maetzold Derek J | Pres. & Chief Exec. Officer | Sell | 3,198 | $31.91 | $102K | – |
| Oct 19, 2026 | Maetzold Derek J | Pres. & Chief Exec. Officer | Sell | 2,718 | $31.91 | $87K | – |
| Oct 12, 2026 | Juvenal Tobin W | Chief Commercial Officer | Sell | 3,288 | $33.64 | $111K | – |
| Oct 5, 2026 | Maetzold Derek J | Pres. & Chief Exec. Officer | Sell | 8,580 | $35.57 | $305K | – |
| Oct 5, 2026 | Maetzold Derek J | Pres. & Chief Exec. Officer | Sell | 3,198 | $35.57 | $114K | – |
| Oct 5, 2026 | Maetzold Derek J | Pres. & Chief Exec. Officer | Sell | 2,718 | $35.57 | $97K | – |
| Oct 1, 2026 | Oelschlager Kristen M | Chief Operating Officer | Sell | 2,807 | $35.75 | $100K | – |
| Oct 1, 2026 | Oelschlager Kristen M | Chief Operating Officer | Sell | 1,346 | $36.38 | $49K | – |
| Sep 30, 2026 | Juvenal Tobin W | Chief Commercial Officer | Sell | 1,034 | $34.20 | $35K | +0.0% |
| Sep 29, 2026 | Juvenal Tobin W | Chief Commercial Officer | Sell | 5,543 | $35.50 | $197K | +0.0% |
| Sep 21, 2026 | Maetzold Derek J | Pres. & Chief Exec. Officer | Sell | 8,580 | $35.33 | $303K | −0.0% |
| Sep 21, 2026 | Maetzold Derek J | Pres. & Chief Exec. Officer | Sell | 3,198 | $35.33 | $113K | −0.0% |
| Sep 21, 2026 | Maetzold Derek J | Pres. & Chief Exec. Officer | Sell | 2,718 | $35.33 | $96K | −0.0% |
| Sep 15, 2026 | Juvenal Tobin W | Chief Commercial Officer | Sell | 3,294 | $35.14 | $116K | −0.0% |
| Sep 14, 2026 | Juvenal Tobin W | Chief Commercial Officer | Sell | 3,306 | $32.32 | $107K | −0.0% |
| Sep 11, 2026 | Maetzold Derek J | Pres. & Chief Exec. Officer | Sell | 8,361 | $32.00 | $268K | −0.1% |
| Sep 11, 2026 | Maetzold Derek J | Pres. & Chief Exec. Officer | Sell | 3,124 | $32.00 | $100K | −0.1% |
| Sep 11, 2026 | Maetzold Derek J | Pres. & Chief Exec. Officer | Sell | 2,656 | $32.00 | $85K | −0.1% |
| Sep 11, 2026 | Maetzold Derek J | Pres. & Chief Exec. Officer | Sell | 223 | $32.78 | $7K | −0.1% |
| Sep 11, 2026 | Maetzold Derek J | Pres. & Chief Exec. Officer | Sell | 83 | $32.78 | $3K | −0.1% |
Showing the 30 most recent of 61 transactions.
Data as of November 8, 2026. Public filings only. A purchase or sale by a politician or an insider does not by itself imply any wrongdoing.
New to these filings? Read how to read a Form 4, how Congress trades are disclosed and what insider cluster buying means. Sources and limits are on the Methodology page.
See these filings as they land
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