CSTLCASTLE BIOSCIENCES INC
Insider trading & SEC Form 4 activity — last 90 days. Latest filing: 2026-06-03.
Insider buys (90d)
$0.00
Insider sells (90d)
$611.8K
Net flow
$-611.8K
Filings
12
Buy transactions
0
Sell transactions
42
Distinct insiders
9
Last close (cached)
$20.12
as of 2026-06-08
1d return
-4.2%
5d return
-4.1%
1m return
+4.6%
Top insiders trading CSTL (90d)
Recent transactions (50)
| Filed | Txn date | Insider | Code | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 2026-06-03 | 2026-06-01 | MAETZOLD DEREK J OfficerDirector | Sale | 278 | $20.86 | $5.8K | open → |
| 2026-06-03 | 2026-06-01 | MAETZOLD DEREK J OfficerDirector | Sale | 278 | $20.86 | $5.8K | open → |
| 2026-06-03 | 2026-06-01 | MAETZOLD DEREK J OfficerDirector | Sale | 278 | $20.86 | $5.8K | open → |
| 2026-06-03 | 2026-06-01 | MAETZOLD DEREK J OfficerDirector | Sale | 278 | $20.86 | $5.8K | open → |
| 2026-06-03 | 2026-06-01 | MAETZOLD DEREK J OfficerDirector | Sale | 1,153 | $20.86 | $24.0K | open → |
| 2026-06-03 | 2026-06-01 | MAETZOLD DEREK J OfficerDirector | Sale | 1,357 | $20.86 | $28.3K | open → |
| 2026-06-03 | 2026-06-01 | MAETZOLD DEREK J OfficerDirector | Sale | 6,214 | $20.86 | $129.6K | open → |
| 2026-06-03 | 2026-06-01 | MAETZOLD DEREK J OfficerDirector | Exer. | 6,010 | $2.39 | $14.4K | open → |
| 2026-06-03 | 2026-06-01 | MAETZOLD DEREK J OfficerDirector | Exer. | 204 | $2.39 | $487.56 | open → |
| 2026-05-27 | 2026-05-22 | Cole G Bradley Director | Exer. | 13,667 | $0.00 | $0.00 | open → |
| 2026-05-27 | 2026-05-22 | BRADBURY DANIEL Director | Exer. | 13,667 | $0.00 | $0.00 | open → |
| 2026-05-27 | 2026-05-22 | Harrison Miles Director | Exer. | 13,667 | $0.00 | $0.00 | open → |
| 2026-05-27 | 2026-05-22 | Olson Tiffany Director | Exer. | 13,667 | $0.00 | $0.00 | open → |
| 2026-05-27 | 2026-05-22 | Goldberg Ellen Director | Exer. | 13,667 | $0.00 | $0.00 | open → |
| 2026-05-27 | 2026-05-22 | Caple Kim Director | Exer. | 13,667 | $0.00 | $0.00 | open → |
| 2026-05-27 | 2026-05-22 | Cotton Rodney Director | Exer. | 13,667 | $0.00 | $0.00 | open → |
| 2026-05-26 | 2026-05-21 | Juvenal Tobin W Officer | Exer. | 11,210 | $3.38 | $37.9K | open → |
| 2026-05-22 | 2026-05-21 | MAETZOLD DEREK J OfficerDirector | Sale | 212 | $20.20 | $4.3K | open → |
| 2026-05-22 | 2026-05-21 | MAETZOLD DEREK J OfficerDirector | Sale | 212 | $20.20 | $4.3K | open → |
| 2026-05-22 | 2026-05-21 | MAETZOLD DEREK J OfficerDirector | Sale | 212 | $20.20 | $4.3K | open → |
| 2026-05-22 | 2026-05-21 | MAETZOLD DEREK J OfficerDirector | Sale | 212 | $20.20 | $4.3K | open → |
| 2026-05-22 | 2026-05-21 | MAETZOLD DEREK J OfficerDirector | Sale | 880 | $20.20 | $17.8K | open → |
| 2026-05-22 | 2026-05-21 | MAETZOLD DEREK J OfficerDirector | Sale | 1,035 | $20.20 | $20.9K | open → |
| 2026-05-22 | 2026-05-21 | MAETZOLD DEREK J OfficerDirector | Sale | 420 | $20.20 | $8.5K | open → |
| 2026-05-22 | 2026-05-21 | MAETZOLD DEREK J OfficerDirector | Exer. | 420 | $2.39 | $1.0K | open → |
| 2026-05-22 | 2026-05-20 | MAETZOLD DEREK J OfficerDirector | Sale | 66 | $20.00 | $1.3K | open → |
| 2026-05-22 | 2026-05-20 | MAETZOLD DEREK J OfficerDirector | Sale | 66 | $20.00 | $1.3K | open → |
| 2026-05-22 | 2026-05-20 | MAETZOLD DEREK J OfficerDirector | Sale | 66 | $20.00 | $1.3K | open → |
| 2026-05-22 | 2026-05-20 | MAETZOLD DEREK J OfficerDirector | Sale | 66 | $20.00 | $1.3K | open → |
| 2026-05-22 | 2026-05-20 | MAETZOLD DEREK J OfficerDirector | Sale | 273 | $20.00 | $5.5K | open → |
| 2026-05-22 | 2026-05-20 | MAETZOLD DEREK J OfficerDirector | Sale | 322 | $20.00 | $6.4K | open → |
| 2026-05-22 | 2026-05-20 | MAETZOLD DEREK J OfficerDirector | Sale | 130 | $20.00 | $2.6K | open → |
| 2026-05-22 | 2026-05-20 | MAETZOLD DEREK J OfficerDirector | Exer. | 130 | $2.39 | $310.70 | open → |
| 2026-05-11 | 2026-05-07 | MAETZOLD DEREK J OfficerDirector | Sale | 41 | $22.59 | $925.99 | open → |
| 2026-05-11 | 2026-05-07 | MAETZOLD DEREK J OfficerDirector | Sale | 41 | $22.59 | $925.99 | open → |
| 2026-05-11 | 2026-05-07 | MAETZOLD DEREK J OfficerDirector | Sale | 41 | $22.59 | $925.99 | open → |
| 2026-05-11 | 2026-05-07 | MAETZOLD DEREK J OfficerDirector | Sale | 41 | $22.59 | $925.99 | open → |
| 2026-05-11 | 2026-05-07 | MAETZOLD DEREK J OfficerDirector | Sale | 168 | $22.59 | $3.8K | open → |
| 2026-05-11 | 2026-05-07 | MAETZOLD DEREK J OfficerDirector | Sale | 198 | $22.59 | $4.5K | open → |
| 2026-05-11 | 2026-05-07 | MAETZOLD DEREK J OfficerDirector | Sale | 906 | $22.59 | $20.5K | open → |
| 2026-05-11 | 2026-05-07 | MAETZOLD DEREK J OfficerDirector | Sale | 237 | $22.08 | $5.2K | open → |
| 2026-05-11 | 2026-05-07 | MAETZOLD DEREK J OfficerDirector | Sale | 237 | $22.08 | $5.2K | open → |
| 2026-05-11 | 2026-05-07 | MAETZOLD DEREK J OfficerDirector | Sale | 237 | $22.08 | $5.2K | open → |
| 2026-05-11 | 2026-05-07 | MAETZOLD DEREK J OfficerDirector | Sale | 237 | $22.08 | $5.2K | open → |
| 2026-05-11 | 2026-05-07 | MAETZOLD DEREK J OfficerDirector | Sale | 985 | $22.08 | $21.7K | open → |
| 2026-05-11 | 2026-05-07 | MAETZOLD DEREK J OfficerDirector | Sale | 1,159 | $22.08 | $25.6K | open → |
| 2026-05-11 | 2026-05-07 | MAETZOLD DEREK J OfficerDirector | Sale | 5,308 | $22.08 | $117.2K | open → |
| 2026-05-11 | 2026-05-07 | MAETZOLD DEREK J OfficerDirector | Exer. | 6,214 | $2.39 | $14.9K | open → |
| 2026-04-23 | 2026-04-21 | MAETZOLD DEREK J OfficerDirector | Sale | 278 | $25.10 | $7.0K | open → |
| 2026-04-23 | 2026-04-21 | MAETZOLD DEREK J OfficerDirector | Sale | 278 | $25.10 | $7.0K | open → |
Other tickers these insiders trade
Want an email the moment a new insider transaction is filed on CSTL? Set up an alert → Watch4Insider delivers SEC Form 4 alerts with a sub-60s p95 SLA.
