CIK 0001447362 · Accelerated filer
CASTLE BIOSCIENCES INC
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- CSTL
- Exchange
- Nasdaq
- Industry
- Services-Medical Laboratories
- FY end
- Dec 31
- Incorporated
- DE
- Entity type
- operating
- EIN
- 770701774
- Phone
- 866-788-9007
- Business address
- 1500 W. PARKWOOD AVE., SUITE 400, FRIENDSWOOD, TX, 77546
- Open-market buys, last 90 days
- $0
- in 0 filings
- Open-market sales, last 90 days
- $5,765,795
- in 18 filings, $4.9M under 10b5-1 plans
Net −$5,765,795. Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.
Who's trading
90 days
Reading 100 more Form 4s from the SEC; this list fills in as they're read.
| Date | Insider | Transaction | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|
| 2026-05-07 | MAETZOLD DEREK J Pres. & Chief Exec. Officer | Option exercise · Stock option (right to buy) 10b5-1 | −6,214 | 754 | ||
| 2026-04-21 | MAETZOLD DEREK J Pres. & Chief Exec. Officer | Option exercise 10b5-1 | +550 | $2.39 | $1K | 22,029 |
| 2026-04-21 | MAETZOLD DEREK J Pres. & Chief Exec. Officer | Sale 10b5-1 | −550 | $25.10 | $14K | 21,479 |
| 2026-04-21 | MAETZOLD DEREK J Pres. & Chief Exec. Officer | Sale 10b5-1 | −1,357 | $25.10 | $34K | 47,495 |
| 2026-04-21 | MAETZOLD DEREK J Pres. & Chief Exec. Officer | Sale 10b5-1 | −1,153 | $25.10 | $29K | 40,367 |
| 2026-04-21 | MAETZOLD DEREK J Pres. & Chief Exec. Officer | Sale 10b5-1 | −278 | $25.10 | $7K | 2,502 |
| 2026-04-21 | MAETZOLD DEREK J Pres. & Chief Exec. Officer | Sale 10b5-1 | −278 | $25.10 | $7K | 2,502 |
| 2026-04-21 | MAETZOLD DEREK J Pres. & Chief Exec. Officer | Sale 10b5-1 | −278 | $25.10 | $7K | 2,502 |
| 2026-04-21 | MAETZOLD DEREK J Pres. & Chief Exec. Officer | Sale 10b5-1 | −278 | $25.10 | $7K | 2,502 |
| 2026-04-21 | MAETZOLD DEREK J Pres. & Chief Exec. Officer | Option exercise · Stock option (right to buy) 10b5-1 | −550 | 6,968 | ||
| 2026-04-06 | MAETZOLD DEREK J Pres. & Chief Exec. Officer | Option exercise 10b5-1 | +6,214 | $2.39 | $15K | 27,693 |
| 2026-04-06 | MAETZOLD DEREK J Pres. & Chief Exec. Officer | Sale 10b5-1 | −6,214 | $25.03 | $156K | 21,479 |
| 2026-04-06 | MAETZOLD DEREK J Pres. & Chief Exec. Officer | Sale 10b5-1 | −1,357 | $25.03 | $34K | 48,852 |
| 2026-04-06 | MAETZOLD DEREK J Pres. & Chief Exec. Officer | Sale 10b5-1 | −1,153 | $25.03 | $29K | 41,520 |
| 2026-04-06 | MAETZOLD DEREK J Pres. & Chief Exec. Officer | Sale 10b5-1 | −278 | $25.03 | $7K | 2,780 |
| 2026-04-06 | MAETZOLD DEREK J Pres. & Chief Exec. Officer | Sale 10b5-1 | −278 | $25.03 | $7K | 2,780 |
| 2026-04-06 | MAETZOLD DEREK J Pres. & Chief Exec. Officer | Sale 10b5-1 | −278 | $25.03 | $7K | 2,780 |
| 2026-04-06 | MAETZOLD DEREK J Pres. & Chief Exec. Officer | Sale 10b5-1 | −278 | $25.03 | $7K | 2,780 |
| 2026-04-06 | MAETZOLD DEREK J Pres. & Chief Exec. Officer | Option exercise · Stock option (right to buy) 10b5-1 | −6,214 | 7,518 | ||
| 2026-03-26 | MAETZOLD DEREK J Pres. & Chief Exec. Officer | Option exercise 10b5-1 | +550 | $2.39 | $1K | 22,029 |
Page 12 of 45 · 897 trades