Greedy Insider
CSTL Insider Trades and Greediness Scores
CASTLE BIOSCIENCES INC (CSTL) insider trades: since Nov 24, 2025, Greedy Insider recorded 0 open-market buys and 221 sales on Form 4 from 5 insiders. The strongest recent filing scored 92 (Strong).
Who bought and who sold
Across the last 221 scoreable Form 4 transactions in CSTL, 0 were open-market purchases and 221 were sales. The table lists the most recent filings with each one's Greediness Score, so the structurally unusual trades are easy to spot first.
| Insider | Role | Type | Shares | Date | Score | ||
|---|---|---|---|---|---|---|---|
| MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sell | 8580.0 | 273787.8 | 2026-10-19 | 81 | View |
| MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sell | 3198.0 | 102048.18 | 2026-10-19 | 69 | View |
| MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sell | 2718.0 | 86731.38 | 2026-10-19 | 68 | View |
| Juvenal Tobin W | Chief Commercial Officer | Sell | 3288.0 | 110608.32 | 2026-10-12 | 68 | View |
| MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sell | 8580.0 | 305156.28 | 2026-10-05 | 87 | View |
| MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sell | 3198.0 | 113740.07 | 2026-10-05 | 75 | View |
| MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sell | 2718.0 | 96668.39 | 2026-10-05 | 74 | View |
| Oelschlager Kristen M | COO | Sell | 2807.0 | 100350.25 | 2026-10-01 | 72 | View |
| Oelschlager Kristen M | COO | Sell | 1346.0 | 48967.48 | 2026-10-01 | 67 | View |
| Juvenal Tobin W | Chief Commercial Officer | Sell | 1034.0 | 35362.8 | 2026-09-30 | 67 | View |
The strongest recent filing
MAETZOLD DEREK J (Pres. & Chief Exec. Officer) sold 17,310 shares of CASTLE BIOSCIENCES INC on Mar 11, 2026, a filing that scored 92 (Strong). It scored Strong because a senior insider was trading and it was direct personal ownership. The score describes the filing, not future returns. This is not investment advice.
Cluster activity
A cluster buy is present: 5 insiders (MAETZOLD DEREK J, Juvenal Tobin W, Stokes Frank, Cole G Bradley) traded CSTL the same direction within a 7-day window. Shared conviction is a stronger structural signal than a lone trade.
How this compares with CASTLE BIOSCIENCES INC's own history
Open-market buys make up 0% of the 221 scoreable CSTL transactions on record between Nov 24, 2025 and Oct 19, 2026. Comparing a filing with the company's own buy/sell mix is how you tell a routine disposal from an unusual accumulation.
Methodology and sources
Scores come from six published, user-adjustable factors (insider role, cluster activity, trade size versus the insider's own history, position impact, filing urgency, and direct versus indirect ownership). The score describes the filing, not future returns. This is not investment advice.
Key facts
- Scoreable Form 4 transactions on record: 221
- Open-market buys: 0
- Sales: 221
- Distinct insiders: 5
- Strongest recent Greediness Score: 92 (Strong)
Primary sources
Related
- Strongest filing
- CSTL in the live feed
- How the Greediness Score works
- What is a cluster buy?
- Form 4 transaction codes
The score describes the filing, not future returns. This is not investment advice.