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Other insiders
Derek J Maetzold
Transactions disclosed by this reporting insider. Insider filers can be individuals or organisations.
Source last checked 2026-10-12 01:37 UTC. Reporting dates appear with the records.
Stock growth & value
Stocks linked to collected disclosures. Prices refresh in the background; the chart shows its actual price dates.
Latest stored close
$34.42
CSTL · 2026-10-09 · USD
Stock price change
+$12.06
+53.94% over the displayed dates
Chart dates
2025-10-14 – 2026-10-09
Completed daily price dates
Stock price · move across the chart or use arrow keys
Oct 14, 2025Oct 9, 2026
Starting investment
$10K
2025-10-14 · hypothetical
Investment value
$15.4K
As of 2026-10-09
Estimated gain / loss
+$5,393.56
+53.94%
Illustration assumes buying this stock at the first displayed close and holding through the last. It does not represent this person's investment or earnings. Uses stored split-adjusted closing prices, without dividends, fees or taxes. Only mapped USD share positions qualify for firm estimates; options, debt and unmapped holdings are excluded. This chart covers the selected stock.
Collected Form 4 activity · 2026-07-01 – 2026-10-05. Priced non-derivative purchases and sales, including scheduled trades; excludes grants, exercises and tax withholding. These totals do not change with the chart period.
Disclosed purchases
—
No priced purchase collected
Disclosed sales
$5M
Sale proceeds, not profit
100 transaction lines
SEC Form 4 records. Grants, exercises, tax withholding and scheduled sales retain their labels.
| Company | Action | Value |
|---|---|---|
| CSTLCastle Biosciences Inc2026-10-05 | Sale10b5-1 plan | $113.7K |
| CSTLCastle Biosciences Inc2026-10-05 | Sale10b5-1 plan | $305.2K |
| CSTLCastle Biosciences Inc2026-10-05 | Sale10b5-1 plan | $96.7K |
| CSTLCastle Biosciences Inc2026-10-05 | Option exercise10b5-1 plan | $19.5K |
| CSTLCastle Biosciences Inc2026-10-05 | Option exercisederivative10b5-1 plan | — |
| CSTLCastle Biosciences Inc2026-09-21 | Sale10b5-1 plan | $303.2K |
| CSTLCastle Biosciences Inc2026-09-21 | Option exercisederivative10b5-1 plan | — |
| CSTLCastle Biosciences Inc2026-09-21 | Sale10b5-1 plan | $113K |
| CSTLCastle Biosciences Inc2026-09-21 | Option exercise10b5-1 plan | $20.5K |
| CSTLCastle Biosciences Inc2026-09-21 | Sale10b5-1 plan | $96K |
| CSTLCastle Biosciences Inc2026-09-11 | Option exercisederivative10b5-1 plan | — |
| CSTLCastle Biosciences Inc2026-09-11 | Sale10b5-1 plan | $2.7K |
| CSTLCastle Biosciences Inc2026-09-11 | Sale10b5-1 plan | $2.3K |
| CSTLCastle Biosciences Inc2026-09-11 | Option exercise10b5-1 plan | $20.5K |
| CSTLCastle Biosciences Inc2026-09-11 | Sale10b5-1 plan | $267.6K |
| CSTLCastle Biosciences Inc2026-09-11 | Sale10b5-1 plan | $100K |
| CSTLCastle Biosciences Inc2026-09-11 | Sale10b5-1 plan | $85K |
| CSTLCastle Biosciences Inc2026-09-11 | Sale10b5-1 plan | $7.3K |
| CSTLCastle Biosciences Inc2026-08-28 | Sale10b5-1 plan | $8.5K |
| CSTLCastle Biosciences Inc2026-08-28 | Sale10b5-1 plan | $8.5K |
| CSTLCastle Biosciences Inc2026-08-28 | Sale10b5-1 plan | $8.5K |
| CSTLCastle Biosciences Inc2026-08-28 | Sale10b5-1 plan | $32.4K |
| CSTLCastle Biosciences Inc2026-08-28 | Sale10b5-1 plan | $7.1K |
| CSTLCastle Biosciences Inc2026-08-28 | Sale10b5-1 plan | $6K |
| CSTLCastle Biosciences Inc2026-08-28 | Sale10b5-1 plan | $711.5 |
| CSTLCastle Biosciences Inc2026-08-28 | Sale10b5-1 plan | $711.5 |
| CSTLCastle Biosciences Inc2026-08-28 | Sale10b5-1 plan | $711.5 |
| CSTLCastle Biosciences Inc2026-08-28 | Sale10b5-1 plan | $711.5 |
| CSTLCastle Biosciences Inc2026-08-28 | Option exercisederivative10b5-1 plan | — |
| CSTLCastle Biosciences Inc2026-08-28 | Sale10b5-1 plan | $8.5K |
| CSTLCastle Biosciences Inc2026-08-28 | Sale10b5-1 plan | $70.6K |
| CSTLCastle Biosciences Inc2026-08-28 | Sale10b5-1 plan | $83K |
| CSTLCastle Biosciences Inc2026-08-28 | Sale10b5-1 plan | $380.2K |
| CSTLCastle Biosciences Inc2026-08-28 | Option exercise10b5-1 plan | $29.7K |
| CSTLCastle Biosciences Inc2026-08-14 | Sale10b5-1 plan | $8.3K |
| CSTLCastle Biosciences Inc2026-08-14 | Sale10b5-1 plan | $8.3K |
| CSTLCastle Biosciences Inc2026-08-14 | Sale10b5-1 plan | $8.3K |
| CSTLCastle Biosciences Inc2026-08-14 | Option exercisederivative10b5-1 plan | — |
| CSTLCastle Biosciences Inc2026-08-14 | Option exercise10b5-1 plan | $2.6K |
| CSTLCastle Biosciences Inc2026-08-14 | Sale10b5-1 plan | $33K |
| CSTLCastle Biosciences Inc2026-08-14 | Sale10b5-1 plan | $81.5K |
| CSTLCastle Biosciences Inc2026-08-14 | Sale10b5-1 plan | $69.2K |
| CSTLCastle Biosciences Inc2026-08-14 | Sale10b5-1 plan | $8.3K |
| CSTLCastle Biosciences Inc2026-08-05 | Option exercise10b5-1 plan | $6.1K |
| CSTLCastle Biosciences Inc2026-08-05 | Sale10b5-1 plan | $78.1K |
| CSTLCastle Biosciences Inc2026-08-05 | Sale10b5-1 plan | $17.1K |
| CSTLCastle Biosciences Inc2026-08-05 | Sale10b5-1 plan | $14.5K |
| CSTLCastle Biosciences Inc2026-08-05 | Option exercisederivative10b5-1 plan | — |
| CSTLCastle Biosciences Inc2026-08-04 | Option exercisederivative10b5-1 plan | — |
| CSTLCastle Biosciences Inc2026-08-04 | Sale10b5-1 plan | $259.3K |
| CSTLCastle Biosciences Inc2026-08-04 | Sale10b5-1 plan | $149.8K |
| CSTLCastle Biosciences Inc2026-08-04 | Sale10b5-1 plan | $127.3K |
| CSTLCastle Biosciences Inc2026-08-04 | Sale10b5-1 plan | $374K |
| CSTLCastle Biosciences Inc2026-08-04 | Sale10b5-1 plan | $88.2K |
| CSTLCastle Biosciences Inc2026-08-04 | Sale10b5-1 plan | $103.9K |
| CSTLCastle Biosciences Inc2026-08-04 | Option exercise10b5-1 plan | $48.7K |
| CSTLCastle Biosciences Inc2026-08-03 | Sale10b5-1 plan | $128.5K |
| CSTLCastle Biosciences Inc2026-08-03 | Sale10b5-1 plan | $109.2K |
| CSTLCastle Biosciences Inc2026-08-03 | Sale10b5-1 plan | $323.7K |
| CSTLCastle Biosciences Inc2026-08-03 | Option exercisederivative10b5-1 plan | — |
| CSTLCastle Biosciences Inc2026-08-03 | Option exercise10b5-1 plan | $25.5K |
| CSTLCastle Biosciences Inc2026-07-31 | Option exercise10b5-1 plan | $15.5K |
| CSTLCastle Biosciences Inc2026-07-31 | Sale10b5-1 plan | $195.4K |
| CSTLCastle Biosciences Inc2026-07-31 | Sale10b5-1 plan | $59.8K |
| CSTLCastle Biosciences Inc2026-07-31 | Sale10b5-1 plan | $51K |
| CSTLCastle Biosciences Inc2026-07-31 | Option exercisederivative10b5-1 plan | — |
| CSTLCastle Biosciences Inc2026-07-27 | Sale10b5-1 plan | $6.5K |
| CSTLCastle Biosciences Inc2026-07-27 | Sale10b5-1 plan | $6.5K |
| CSTLCastle Biosciences Inc2026-07-27 | Sale10b5-1 plan | $5.8K |
| CSTLCastle Biosciences Inc2026-07-27 | Sale10b5-1 plan | $1.3K |
| CSTLCastle Biosciences Inc2026-07-27 | Sale10b5-1 plan | $1.1K |
| CSTLCastle Biosciences Inc2026-07-27 | Sale10b5-1 plan | $250.6 |
| CSTLCastle Biosciences Inc2026-07-27 | Sale10b5-1 plan | $250.6 |
| CSTLCastle Biosciences Inc2026-07-27 | Sale10b5-1 plan | $250.6 |
| CSTLCastle Biosciences Inc2026-07-27 | Sale10b5-1 plan | $250.6 |
| CSTLCastle Biosciences Inc2026-07-27 | Option exercisederivative10b5-1 plan | — |
| CSTLCastle Biosciences Inc2026-07-27 | Sale10b5-1 plan | $6.5K |
| CSTLCastle Biosciences Inc2026-07-27 | Sale10b5-1 plan | $6.5K |
| CSTLCastle Biosciences Inc2026-07-27 | Sale10b5-1 plan | $26.8K |
| CSTLCastle Biosciences Inc2026-07-27 | Sale10b5-1 plan | $31.5K |
| CSTLCastle Biosciences Inc2026-07-27 | Sale10b5-1 plan | $144.3K |
| CSTLCastle Biosciences Inc2026-07-27 | Option exercise10b5-1 plan | $14.9K |
| CSTLCastle Biosciences Inc2026-07-14 | Sale10b5-1 plan | $6.4K |
| CSTLCastle Biosciences Inc2026-07-14 | Sale10b5-1 plan | $6.4K |
| CSTLCastle Biosciences Inc2026-07-14 | Option exercisederivative10b5-1 plan | — |
| CSTLCastle Biosciences Inc2026-07-14 | Option exercise10b5-1 plan | $1.3K |
| CSTLCastle Biosciences Inc2026-07-14 | Sale10b5-1 plan | $12.6K |
| CSTLCastle Biosciences Inc2026-07-14 | Sale10b5-1 plan | $31.1K |
| CSTLCastle Biosciences Inc2026-07-14 | Sale10b5-1 plan | $26.4K |
| CSTLCastle Biosciences Inc2026-07-14 | Sale10b5-1 plan | $6.4K |
| CSTLCastle Biosciences Inc2026-07-14 | Sale10b5-1 plan | $6.4K |
| CSTLCastle Biosciences Inc2026-07-01 | Sale10b5-1 plan | $6.8K |
| CSTLCastle Biosciences Inc2026-07-01 | Sale10b5-1 plan | $6.8K |
| CSTLCastle Biosciences Inc2026-07-01 | Option exercisederivative10b5-1 plan | — |
| CSTLCastle Biosciences Inc2026-07-01 | Option exercise10b5-1 plan | $14.9K |
| CSTLCastle Biosciences Inc2026-07-01 | Sale10b5-1 plan | $150.9K |
| CSTLCastle Biosciences Inc2026-07-01 | Sale10b5-1 plan | $33K |
| CSTLCastle Biosciences Inc2026-07-01 | Sale10b5-1 plan | $28K |
| CSTLCastle Biosciences Inc2026-07-01 | Sale10b5-1 plan | $6.8K |
| CSTLCastle Biosciences Inc2026-07-01 | Sale10b5-1 plan | $6.8K |
Original sources
- SEC filings ↗filings