CASTLE BIOSCIENCES INC (CSTL)
Data as of , from SEC Form 4 filings.
Net insider selling (90d)Watch CSTL
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Derek J. Maetzold - OfficerOpen-market sale$305K
About CASTLE BIOSCIENCES INC (CSTL)
CASTLE BIOSCIENCES INC files with the SEC under CIK 0001447362 and is classified as medical laboratories. It is grouped with Health Care companies on this site.
CSTL Form 4 activity by transaction type, last 90 days
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Open-market sale | 85 | 259,229 | $8.25M |
| Option exercise | 24 | 186,844 |
Dollar totals cover purchases and sales only (codes P and S). Grants, option exercises, gifts and tax withholding are counted in shares, because none of them is a trade at a market price.
CSTL insider transactions (Form 4)
154106 Form 4 filings on record, the earliest from Oct 8, 2024, newest first. Filing history page 1 of 3.
| Date | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Derek J. Maetzold - Officer | Option exercise | Common Stock | 8,165 | $2.39 | $20K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 8,580 | $35.57 footnote F2 | $305K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 3,198 | $35.57 footnote F2 | $114K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 2,718 | $35.57 footnote F2 | $97K | |
| Derek J. Maetzold - Officer | Option exercise | Stock option (right to buy) | 8,165 | $0.00 | - | |
| ||||||
| Kristen M. Oelschlager - Officer | Option exercise | Common Stock | 4,153 | $3.38 | $14K | |
| Kristen M. Oelschlager - Officer | Open-market sale | Common Stock | 2,807 | $35.75 footnote F2 | $100K | |
| Kristen M. Oelschlager - Officer | Open-market sale | Common Stock | 1,346 | $36.38 footnote F3 | $49K | |
| Kristen M. Oelschlager - Officer | Option exercise | Stock option (right to buy) | 4,153 | $0.00 | - | |
| ||||||
| Tobin W. Juvenal - Officer | Open-market sale | Common Stock | 5,543 | $35.50 footnote F2 | $197K | |
| Tobin W. Juvenal - Officer | Open-market sale | Common Stock | 1,034 | $34.20 footnote F3 | $35K | |
| ||||||
| Derek J. Maetzold - Officer | Option exercise | Common Stock | 8,580 | $2.39 | $21K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 8,580 | $35.33 footnote F2 | $303K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 3,198 | $35.33 footnote F2 | $113K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 2,718 | $35.33 footnote F2 | $96K | |
| Derek J. Maetzold - Officer | Option exercise | Stock option (right to buy) | 8,580 | $0.00 | - | |
| ||||||
| Tobin W. Juvenal - Officer | Open-market sale | Common Stock | 3,306 | $32.32 footnote F2 | $107K | |
| Tobin W. Juvenal - Officer | Open-market sale | Common Stock | 3,294 | $35.14 footnote F3 | $116K | |
| ||||||
| Derek J. Maetzold - Officer | Option exercise | Common Stock | 8,584 | $2.39 | $21K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 8,361 | $32.00 footnote F2 | $268K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 3,124 | $32.00 footnote F2 | $100K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 2,656 | $32.00 footnote F2 | $85K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 223 | $32.78 | $7K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 83 | $32.78 | $3K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 71 | $32.78 | $2K | |
| Derek J. Maetzold - Officer | Option exercise | Stock option (right to buy) | 8,584 | $0.00 | - | |
| ||||||
| Kristen M. Oelschlager - Officer | Option exercise | Common Stock | 4,152 | $3.38 | $14K | |
| Kristen M. Oelschlager - Officer | Open-market sale | Common Stock | 3,952 | $33.36 footnote F3 | $132K | |
| Kristen M. Oelschlager - Officer | Open-market sale | Common Stock | 200 | $34.02 | $7K | |
| Kristen M. Oelschlager - Officer | Option exercise | Stock option (right to buy) | 4,152 | $0.00 | - | |
| ||||||
| Tobin W. Juvenal - Officer | Open-market sale | Common Stock | 1,730 | $32.81 footnote F2 | $57K | |
| ||||||
| Derek J. Maetzold - Officer | Option exercise | Common Stock | 12,428 | $2.39 | $30K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 11,472 | $33.14 footnote F2 | $380K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 2,505 | $33.14 footnote F2 | $83K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 2,129 | $33.14 footnote F2 | $71K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 257 | $33.14 footnote F2 | $9K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 257 | $33.14 footnote F2 | $9K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 257 | $33.14 footnote F2 | $9K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 257 | $33.14 footnote F2 | $9K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 956 | $33.88 footnote F9 | $32K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 209 | $33.88 footnote F9 | $7K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 177 | $33.88 footnote F9 | $6K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 21 | $33.88 footnote F9 | $711 | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 21 | $33.88 footnote F9 | $711 | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 21 | $33.88 footnote F9 | $711 | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 21 | $33.88 footnote F9 | $711 | |
| Derek J. Maetzold - Officer | Option exercise | Stock option (right to buy) | 12,428 | $0.00 | - | |
| ||||||
| Tobin W. Juvenal - Officer | Open-market sale | Common Stock | 9,050 | $35.04 footnote F2 | $317K | |
| ||||||
| Kristen M. Oelschlager - Officer | Open-market sale | Common Stock | 12,218 | $33.69 footnote F1 | $412K | |
| Kristen M. Oelschlager - Officer | Open-market sale | Common Stock | 7,161 | $34.26 footnote F3 | $245K | |
| Kristen M. Oelschlager - Officer | Open-market sale | Common Stock | 5,223 | $34.64 footnote F4 | $181K | |
| ||||||
| Tobin W. Juvenal - Officer | Open-market sale | Common Stock | 1,730 | $29.59 footnote F2 | $51K | |
| ||||||
 Frank Stokes - Officer | Open-market sale | Common Stock | 24,908 | $29.77 footnote F1 | $742K | |
| ||||||
| Derek J. Maetzold - Officer | Option exercise | Common Stock | 1,100 | $2.39 | $3K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 1,100 | $30.02 footnote F2 | $33K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 2,714 | $30.02 footnote F2 | $81K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 2,306 | $30.02 footnote F2 | $69K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 278 | $30.02 footnote F2 | $8K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 278 | $30.02 footnote F2 | $8K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 278 | $30.02 footnote F2 | $8K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 278 | $30.02 footnote F2 | $8K | |
| Derek J. Maetzold - Officer | Option exercise | Stock option (right to buy) | 1,100 | $0.00 | - | |
| ||||||
| Tobin W. Juvenal - Officer | Open-market sale | Common Stock | 1,301 | $38.39 | $50K | |
| Derek J. Maetzold - Officer | Option exercise | Common Stock | 20,356 | $2.39 | $49K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 8,421 | $30.79 footnote F2 | $259K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 3,374 | $30.79 footnote F2 | $104K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 2,866 | $30.79 footnote F2 | $88K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 11,935 | $31.34 footnote F5 | $374K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 4,782 | $31.34 footnote F5 | $150K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 4,063 | $31.34 footnote F5 | $127K | |
| Derek J. Maetzold - Officer | Option exercise | Common Stock | 2,546 | $2.39 | $6K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 2,546 | $30.68 footnote F6 | $78K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 556 | $30.68 footnote F6 | $17K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 473 | $30.68 footnote F6 | $15K | |
| Derek J. Maetzold - Officer | Option exercise | Stock option (right to buy) | 20,356 | $0.00 | - | |
| Derek J. Maetzold - Officer | Option exercise | Stock option (right to buy) | 2,546 | $0.00 | - | |
| ||||||
| Kristen M. Oelschlager - Officer | Open-market sale | Common Stock | 3,000 | $29.12 footnote F2 | $87K | |
| Kristen M. Oelschlager - Officer | Open-market sale | Common Stock | 4,486 | $30.00 footnote F3 | $135K | |
| Kristen M. Oelschlager - Officer | Open-market sale | Common Stock | 1,100 | $30.62 footnote F4 | $34K | |
| ||||||
| Tobin W. Juvenal - Officer | Open-market sale | Common Stock | 8,149 | $28.84 footnote F2 | $235K | |
| Tobin W. Juvenal - Officer | Open-market sale | Common Stock | 7,270 | $29.58 footnote F3 | $215K | |
| Tobin W. Juvenal - Officer | Open-market sale | Common Stock | 1,891 | $30.26 footnote F4 | $57K | |
| Tobin W. Juvenal - Officer | Open-market sale | Common Stock | 1,730 | $28.25 footnote F5 | $49K | |
| ||||||
| Derek J. Maetzold - Officer | Option exercise | Common Stock | 6,480 | $2.39 | $15K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 6,480 | $30.15 footnote F3 | $195K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 1,983 | $30.15 footnote F3 | $60K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 1,690 | $30.15 footnote F3 | $51K | |
| Derek J. Maetzold - Officer | Option exercise | Common Stock | 10,664 | $2.39 | $25K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 10,664 | $30.35 footnote F6 | $324K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 4,232 | $30.35 footnote F6 | $128K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 3,597 | $30.35 footnote F6 | $109K | |
| Derek J. Maetzold - Officer | Option exercise | Stock option (right to buy) | 6,480 | $0.00 | - | |
| Derek J. Maetzold - Officer | Option exercise | Stock option (right to buy) | 10,664 | $0.00 | - | |
| ||||||
| Derek J. Maetzold - Officer | Option exercise | Common Stock | 6,214 | $2.39 | $15K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 5,982 | $24.13 footnote F2 | $144K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 1,307 | $24.13 footnote F2 | $32K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 1,110 | $24.13 footnote F2 | $27K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 268 | $24.13 footnote F2 | $6K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 268 | $24.13 footnote F2 | $6K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 268 | $24.13 footnote F2 | $6K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 268 | $24.13 footnote F2 | $6K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 232 | $25.06 footnote F9 | $6K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 50 | $25.06 footnote F9 | $1K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 43 | $25.06 footnote F9 | $1K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 10 | $25.06 footnote F9 | $251 | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 10 | $25.06 footnote F9 | $251 | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 10 | $25.06 footnote F9 | $251 | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 10 | $25.06 footnote F9 | $251 | |
| 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 | $22.92 footnote F2 | $13K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 1,357 | $22.92 footnote F2 | $31K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 1,153 | $22.92 footnote F2 | $26K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 278 | $22.92 footnote F2 | $6K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 278 | $22.92 footnote F2 | $6K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 278 | $22.92 footnote F2 | $6K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 278 | $22.92 footnote F2 | $6K | |
| 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 | $24.29 footnote F2 | $151K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 1,357 | $24.29 footnote F2 | $33K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 1,153 | $24.29 footnote F2 | $28K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 278 | $24.29 footnote F2 | $7K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 278 | $24.29 footnote F2 | $7K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 278 | $24.29 footnote F2 | $7K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 278 | $24.29 footnote F2 | $7K | |
| Derek J. Maetzold - Officer | Option exercise | Stock option (right to buy) | 6,214 | $0.00 | - | |
| ||||||
| Kristen M. Oelschlager - Officer | Open-market sale | Common Stock | 8,186 | $24.40 footnote F2 | $200K | |
| Kristen M. Oelschlager - Officer | Open-market sale | Common Stock | 400 | $24.78 footnote F3 | $10K | |
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| Kristen M. Oelschlager - Officer | Open-market sale | Common Stock | 8,587 | $20.71 footnote F2 | $178K | |
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| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 550 | $20.66 footnote F2 | $11K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 1,357 | $20.66 footnote F2 | $28K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 1,153 | $20.66 footnote F2 | $24K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 278 | $20.66 footnote F2 | $6K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 278 | $20.66 footnote F2 | $6K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 278 | $20.66 footnote F2 | $6K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 278 | $20.66 footnote F2 | $6K | |
| Derek J. Maetzold - Officer | Option exercise | Stock option (right to buy) | 550 | $0.00 | - | |
| Derek J. Maetzold - Officer | Option exercise | Common Stock | 550 | $2.39 | $1K | |
| ||||||
| Derek J. Maetzold - Officer | Option exercise | Common Stock | 204 | $2.39 | $488 | |
| Derek J. Maetzold - Officer | Option exercise | Common Stock | 6,010 | $2.39 | $14K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 6,214 | $20.86 footnote F2 | $130K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 1,357 | $20.86 footnote F2 | $28K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 1,153 | $20.86 footnote F2 | $24K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 278 | $20.86 footnote F2 | $6K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 278 | $20.86 footnote F2 | $6K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 278 | $20.86 footnote F2 | $6K | |
| Derek J. Maetzold - Officer | Open-market sale | Common Stock | 278 | $20.86 footnote F2 | $6K | |
| Derek J. Maetzold - Officer | Option exercise | Stock option (right to buy) | 204 | $0.00 | - | |
| Derek J. Maetzold - Officer | Option exercise | Stock option (right to buy) | 6,010 | $0.00 | - | |
| ||||||
 Tiffany Olson - Director | Grant or award | Restricted Stock Units | 11,766 | $0.00 | - | |
| Ellen Goldberg - Director | Grant or award | Restricted Stock Units | 11,766 | $0.00 | - | |
| Miles Harrison - Director | Grant or award | Restricted Stock Units | 11,766 | $0.00 | - | |
 Rodney Cotton - Director | Grant or award | Restricted Stock Units | 11,766 | $0.00 | - | |
Item 2.02, 7.01, 9.01
Item 5.07
Item 2.02, 7.01, 9.01
Item 2.02, 7.01, 9.01
Recent CSTL Form 144 notices of proposed sale
3An insider files Form 144 before selling restricted or control stock. It announces a planned sale. If the sale goes ahead, it shows up later on a Form 4.
| Filed | Filer | Relationship | Shares | Market value | Notice |
|---|---|---|---|---|---|
| Tobin Juvenal | Chief Commercial Officer | 13,154 | $431K | View on EDGAR | |
| Derek Maetzold | Officer | 28,992 |
CSTL insider trading FAQ
What is the latest insider trade for CSTL?
CASTLE BIOSCIENCES INC (CSTL) had 20 insider filings in the last 90 days, with the most recent on 2026-10-07. The full record for CSTL runs to 106 Form 4 filings, the earliest from 2024-10-08. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.
How many insiders are buying CSTL stock?
No insider purchases of CSTL were filed in the last 90 days.
How many insiders are selling CSTL stock?
85 insider sales of CSTL were filed in the last 90 days, totaling $8.25M.
Where can I see CSTL SEC filings (Form 4, 10-K, 10-Q, 8-K)?
This page collects CSTL Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
More Health Care companies with insider activity
Recent insider filings
10The EDGAR links open each original Form 4, so you can check any number on this page against the filing it came from.
- - Derek J. Maetzold view on EDGAR
- - Kristen M. Oelschlager view on EDGAR
- - Tobin W. Juvenal view on EDGAR
- - Derek J. Maetzold view on EDGAR
- - Tobin W. Juvenal view on EDGAR
- - Derek J. Maetzold view on EDGAR
- - Kristen M. Oelschlager view on EDGAR
- - Tobin W. Juvenal view on EDGAR
- - Derek J. Maetzold view on EDGAR
Related companies with recent insider activity
Learn more
- Insider selling: signal or noise?
- Why most insider sales are routine, and the few patterns worth a second look.
- Form 144 vs Form 4
- A Form 144 announces a planned sale; the Form 4 reports it after it happens.
- Insider activity in Health Care
- Where CSTL's peers are being bought and sold.
- Every recent Form 4
- The market-wide feed, updated as filings arrive from SEC EDGAR.
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