CASTLE BIOSCIENCES INC (CSTL)
$33.50-$0.76 (-2.22%) Today
Frank Stokes - Officer
Derek J. Maetzold - OfficerDerek J. Maetzold - OfficerCastle Biosciences Inc is a molecular diagnostics company. The group provides test solutions for the diagnosis and treatment of dermatologic cancers, Barrett's esophagus (BE), and uveal melanoma. The product portfolio of the company includes DecisionDx-Melanoma, a risk stratification gene expression profile (GEP) test; DecisionDx-SCC, a risk stratification test for cutaneous squamous cell carcinoma; MyPath Melanoma, a diagnostic GEP test for use in patients with difficult-to-diagnose melanocytic lesions; and TissueCypher, a test to predict future development of progression of high-grade dysplasia and/or esophageal cancer. The company derives revenues through the delivery of test reports for its molecular diagnostic tests.
https://www.castlebiosciences.comSEC filings for CSTL on EDGAR
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Open-market sale | 81 | 219,136 | $6.36M |
| Option exercise | 22 | 121,776 |
Dollar totals are shown for open-market purchases and sales only. Grants, option exercises, gifts and tax withholding are reported by share count because they are not trades at a market price.
97 Form 4 filings on record, the earliest from Oct 8, 2024, newest first. Filing history page 2 of 3.
| Date | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
 Rodney Cotton - Director | Option exercise | Common Stock | 13,667 | - | - | |
| Rodney Cotton - Director | Option exercise | Restricted Stock Units | 13,667 | $0.00 | - | |
| Tobin W. Juvenal - Officer | Option exercise | Common Stock | 11,210 | $3.38 | $38K | |
| Tobin W. Juvenal - Officer | Option exercise | Stock option (right to buy) | 11,210 | $0.00 | - | |
| Derek J. Maetzold - Officer | Option exercise | Common Stock | 130 | $2.39 | $311 | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 130 | $20.00 | $3K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 322 | $20.00 | $6K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 273 | $20.00 | $5K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 212 | $20.20 | $4K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 66 | $20.00 | $1K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 66 | $20.00 | $1K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 66 | $20.00 | $1K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 66 | $20.00 | $1K | |
| Derek J. Maetzold - Officer | Option exercise | Common Stock | 420 | $2.39 | $1K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 420 | $20.20 | $8K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 1,035 | $20.20 | $21K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 880 | $20.20 | $18K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 212 | $20.20 | $4K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 212 | $20.20 | $4K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 212 | $20.20 | $4K | |
| Derek J. Maetzold - Officer | Option exercise | Stock option (right to buy) | 130 | $0.00 | - | |
| Derek J. Maetzold - Officer | Option exercise | Stock option (right to buy) | 420 | $0.00 | - | |
| Derek J. Maetzold - Officer | Option exercise | Common Stock | 6,214 | $2.39 | $15K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 5,308 | $22.08 | $117K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 1,159 | $22.08 | $26K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 985 | $22.08 | $22K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 237 | $22.08 | $5K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 237 | $22.08 | $5K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 237 | $22.08 | $5K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 237 | $22.08 | $5K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 906 | $22.59 | $20K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 198 | $22.59 | $4K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 168 | $22.59 | $4K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 41 | $22.59 | $926 | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 41 | $22.59 | $926 | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 41 | $22.59 | $926 | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 41 | $22.59 | $926 | |
| Derek J. Maetzold - Officer | Option exercise | Stock option (right to buy) | 6,214 | $0.00 | - | |
| Derek J. Maetzold - Officer | Option exercise | Common Stock | 550 | $2.39 | $1K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 550 | $25.10 | $14K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 1,357 | $25.10 | $34K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 1,153 | $25.10 | $29K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 278 | $25.10 | $7K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 278 | $25.10 | $7K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 278 | $25.10 | $7K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 278 | $25.10 | $7K | |
| Derek J. Maetzold - Officer | Option exercise | Stock option (right to buy) | 550 | $0.00 | - | |
| Derek J. Maetzold - Officer | Option exercise | Common Stock | 6,214 | $2.39 | $15K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 6,214 | $25.03 | $156K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 1,357 | $25.03 | $34K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 1,153 | $25.03 | $29K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 278 | $25.03 | $7K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 278 | $25.03 | $7K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 278 | $25.03 | $7K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 278 | $25.03 | $7K | |
| Derek J. Maetzold - Officer | Option exercise | Stock option (right to buy) | 6,214 | $0.00 | - | |
| Derek J. Maetzold - Officer | Option exercise | Common Stock | 550 | $2.39 | $1K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 550 | $25.55 | $14K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 1,357 | $25.55 | $35K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 1,153 | $25.55 | $29K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 278 | $25.55 | $7K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 278 | $25.55 | $7K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 278 | $25.55 | $7K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 278 | $25.55 | $7K | |
| Derek J. Maetzold - Officer | Option exercise | Stock option (right to buy) | 550 | $0.00 | - | |
| Rodney Cotton - Director | Option exercise | Common Stock | 5,329 | - | - | |
| Rodney Cotton - Director | Option exercise | Restricted Stock Units | 5,329 | $0.00 | - | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 18,650 | $25.93 | $484K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 650 | $25.39 | $17K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 13,204 | $25.45 | $336K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 17,449 | $25.96 | $453K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 126 | $26.68 | $3K | |
| Tobin W. Juvenal - Officer | Open-market sale | Common Stock | 20,863 | $25.24 | $527K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 17,310 | $26.11 | $452K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 1,357 | $26.11 | $35K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 1,160 | $26.11 | $30K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 282 | $26.11 | $7K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 279 | $26.11 | $7K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 279 | $26.11 | $7K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 279 | $26.11 | $7K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 23,179 | $25.28 | $586K | |
| Derek J. Maetzold - Officer | Option exercise | Stock option (right to buy) | 6,226 | $0.00 | - | |
| Derek J. Maetzold - Officer | Option exercise | Common Stock | 6,226 | $2.39 | $15K | |
| Frank Stokes - Officer | Open-market sale | Common Stock | 6,001 | $27.98 | $168K | |
| G. Bradley Cole - Director | Option exercise | Stock option (right to buy) | 4,748 | $0.00 | - | |
| G. Bradley Cole - Director | Option exercise | Common Stock | 4,748 | $3.38 | $16K | |
| G. Bradley Cole - Director | Open-market sale | Common Stock | 4,748 | $28.44 | $135K | |
| G. Bradley Cole - Director | Open-market sale | Common Stock | 2,655 | $28.51 | $76K | |
| Tobin W. Juvenal - Officer | Option exercise | Restricted Stock Units | 13,811 | $0.00 | - | |
| Tobin W. Juvenal - Officer | Option exercise | Restricted Stock Units | 11,960 | $0.00 | - | |
| Tobin W. Juvenal - Officer | Tax withholding / forfeiture | Common Stock | 10,399 | $28.17 | $293K | |
| Tobin W. Juvenal - Officer | Tax withholding / forfeiture | Common Stock | 3,716 | $27.57 | $102K | |
| Tobin W. Juvenal - Officer | Option exercise | Common Stock | 25,771 | - | - | |
| Tobin W. Juvenal - Officer | Grant or award | Restricted Stock Units | 48,367 | $0.00 | - | |
| Kristen M. Oelschlager - Officer | Tax withholding / forfeiture | Common Stock | 6,792 | $28.17 | $191K | |
| Kristen M. Oelschlager - Officer | Tax withholding / forfeiture | Common Stock | 2,427 | $27.57 | $67K | |
| Kristen M. Oelschlager - Officer | Option exercise | Common Stock | 25,771 | - | - | |
| Kristen M. Oelschlager - Officer | Grant or award | Restricted Stock Units | 48,367 | $0.00 | - | |
| Kristen M. Oelschlager - Officer | Option exercise | Restricted Stock Units | 13,811 | $0.00 | - | |
| Kristen M. Oelschlager - Officer | Option exercise | Restricted Stock Units | 11,960 | $0.00 | - | |
| Derek J. Maetzold - Officer | Grant or award | Restricted Stock Units | 102,597 | $0.00 | - | |
| Derek J. Maetzold - Officer | Option exercise | Restricted Stock Units | 31,110 | $0.00 | - | |
| Derek J. Maetzold - Officer | Option exercise | Restricted Stock Units | 27,987 | $0.00 | - | |
| Derek J. Maetzold - Officer | Tax withholding / forfeiture | Common Stock | 17,931 | $28.17 | $505K | |
| Derek J. Maetzold - Officer | Tax withholding / forfeiture | Common Stock | 19,043 | $27.57 | $525K | |
| Derek J. Maetzold - Officer | Option exercise | Common Stock | 59,097 | - | - | |
| Frank Stokes - Officer | Open-market sale | Common Stock | 1,700 | $27.81 | $47K | |
| Frank Stokes - Officer | Tax withholding / forfeiture | Common Stock | 3,611 | $27.57 | $100K | |
| Frank Stokes - Officer | Option exercise | Common Stock | 24,146 | - | - | |
| Frank Stokes - Officer | Grant or award | Restricted Stock Units | 48,367 | $0.00 | - | |
| Frank Stokes - Officer | Option exercise | Restricted Stock Units | 12,186 | $0.00 | - | |
| Frank Stokes - Officer | Option exercise | Restricted Stock Units | 11,960 | $0.00 | - | |
| Frank Stokes - Officer | Option exercise | Stock option (right to buy) | 3,800 | $0.00 | - | |
| Frank Stokes - Officer | Tax withholding / forfeiture | Common Stock | 10,732 | $28.17 | $302K | |
| Frank Stokes - Officer | Option exercise | Common Stock | 3,800 | $3.38 | $13K | |
| Frank Stokes - Officer | Open-market sale | Common Stock | 5,300 | $27.32 | $145K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 3,200 | $39.91 | $128K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 646 | $37.82 | $24K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 171 | $38.61 | $7K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 4,017 | $40.01 | $161K | |
| Derek J. Maetzold - Officer | Grant or award | Common Stock | 62,219 | $0.00 | - | |
| Derek J. Maetzold - Officer | Grant or award | Performance-Based Stock Unit | 62,219 | $0.00 | - | |
| Kristen M. Oelschlager - Officer | Grant or award | Common Stock | 9,207 | $0.00 | - | |
| Kristen M. Oelschlager - Officer | Grant or award | Performance-Based Stock Unit | 9,207 | $0.00 | - | |
| Tobin W. Juvenal - Officer | Grant or award | Common Stock | 9,207 | $0.00 | - | |
| Tobin W. Juvenal - Officer | Grant or award | Performance-Based Stock Unit | 9,207 | $0.00 | - | |
| Frank Stokes - Officer | Grant or award | Common Stock | 8,124 | $0.00 | - | |
| Frank Stokes - Officer | Grant or award | Performance-Based Stock Unit | 8,124 | $0.00 | - | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 2,678 | $39.23 | $105K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 4,258 | $40.09 | $171K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 5,115 | $40.05 | $205K | |
| Tobin W. Juvenal - Officer | Option exercise | Common Stock | 4,693 | $3.38 | $16K | |
| Tobin W. Juvenal - Officer | Open-market sale | Common Stock | 4,693 | $35.58 | $167K | |
| Tobin W. Juvenal - Officer | Option exercise | Stock option (right to buy) | 4,693 | $0.00 | - | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 2,678 | $34.02 | $91K | |
| Kristen M. Oelschlager - Officer | Open-market sale | Common Stock | 18,932 | $35.10 | $665K |
A Form 144 is notice of an INTENDED sale, not a completed one. It often precedes the Form 4 that reports the trade actually happening.
| Filed | Filer | Relationship | Shares | Market value | Notice |
|---|---|---|---|---|---|
| Tobin Juvenal | Chief Commercial Officer | 22,500 | $788K | View on EDGAR | |
| Kristen M. Oelschlager | Officer | 24,602 | $841K | View on EDGAR | |
| FRANKLIN M. STOKES | Officer | 24,908 | $741K | View on EDGAR |
CASTLE BIOSCIENCES INC (CSTL) had 17 insider filings in the last 90 days, with the most recent on 2026-08-27. The full record for CSTL runs to 97 Form 4 filings, the earliest from 2024-10-08. InsiderAlpha tracks every Form 4, Form 144, and 8-K filing in real time.
No insider purchases of CSTL were filed in the last 90 days.
81 insider sales of CSTL were filed in the last 90 days, totaling $6.36M.
This page tracks CSTL Form 4 insider transactions, Form 144 sale notices, and 8-K material event disclosures in one timeline. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
Create a free InsiderAlpha account and press Watch on this page to add CSTL to your watchlist. A free account also opens the full scored daily plan with every past day and 3 months of price history. No card is required. Sign up at https://insideralpha.ai/register.
Every Form 4 below links to the original document on SEC EDGAR, so the numbers on this page can be checked against the filing they came from.
Real-time Form 4 alerts, AI-scored daily trade ideas and 10b5-1 plan flags.
