CSTLCASTLE BIOSCIENCES INC
Insider trading & SEC Form 4 activity — last 90 days. Latest filing: 2026-07-16.
Insider buys (90d)
$0.00
Insider sells (90d)
$1.42M
Net flow
$-1.42M
Filings
17
Buy transactions
0
Sell transactions
66
Distinct insiders
10
Last close (cached)
$24.16
as of 2026-07-17
1d return
-0.3%
5d return
+1.9%
1m return
+18.1%
Top insiders trading CSTL (90d)
Recent transactions (50)
| Filed | Txn date | Insider | Code | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 2026-07-16 | 2026-07-14 | MAETZOLD DEREK J OfficerDirector | Sale | 278 | $22.92 | $6.4K | open → |
| 2026-07-16 | 2026-07-14 | MAETZOLD DEREK J OfficerDirector | Sale | 278 | $22.92 | $6.4K | open → |
| 2026-07-16 | 2026-07-14 | MAETZOLD DEREK J OfficerDirector | Sale | 278 | $22.92 | $6.4K | open → |
| 2026-07-16 | 2026-07-14 | MAETZOLD DEREK J OfficerDirector | Sale | 278 | $22.92 | $6.4K | open → |
| 2026-07-16 | 2026-07-14 | MAETZOLD DEREK J OfficerDirector | Sale | 1,153 | $22.92 | $26.4K | open → |
| 2026-07-16 | 2026-07-14 | MAETZOLD DEREK J OfficerDirector | Sale | 1,357 | $22.92 | $31.1K | open → |
| 2026-07-16 | 2026-07-14 | MAETZOLD DEREK J OfficerDirector | Sale | 550 | $22.92 | $12.6K | open → |
| 2026-07-16 | 2026-07-14 | MAETZOLD DEREK J OfficerDirector | Exer. | 550 | $2.39 | $1.3K | open → |
| 2026-07-06 | 2026-07-01 | MAETZOLD DEREK J OfficerDirector | Sale | 278 | $24.29 | $6.8K | open → |
| 2026-07-06 | 2026-07-01 | MAETZOLD DEREK J OfficerDirector | Sale | 278 | $24.29 | $6.8K | open → |
| 2026-07-06 | 2026-07-01 | MAETZOLD DEREK J OfficerDirector | Sale | 278 | $24.29 | $6.8K | open → |
| 2026-07-06 | 2026-07-01 | MAETZOLD DEREK J OfficerDirector | Sale | 278 | $24.29 | $6.8K | open → |
| 2026-07-06 | 2026-07-01 | MAETZOLD DEREK J OfficerDirector | Sale | 1,153 | $24.29 | $28.0K | open → |
| 2026-07-06 | 2026-07-01 | MAETZOLD DEREK J OfficerDirector | Sale | 1,357 | $24.29 | $33.0K | open → |
| 2026-07-06 | 2026-07-01 | MAETZOLD DEREK J OfficerDirector | Sale | 6,214 | $24.29 | $150.9K | open → |
| 2026-07-06 | 2026-07-01 | MAETZOLD DEREK J OfficerDirector | Exer. | 6,214 | $2.39 | $14.9K | open → |
| 2026-07-06 | 2026-07-01 | Oelschlager Kristen M Officer | Sale | 400 | $24.78 | $9.9K | open → |
| 2026-07-06 | 2026-07-01 | Oelschlager Kristen M Officer | Sale | 8,186 | $24.40 | $199.7K | open → |
| 2026-06-18 | 2026-06-16 | Oelschlager Kristen M Officer | Sale | 8,587 | $20.71 | $177.8K | open → |
| 2026-06-17 | 2026-06-15 | MAETZOLD DEREK J OfficerDirector | Sale | 278 | $20.66 | $5.7K | open → |
| 2026-06-17 | 2026-06-15 | MAETZOLD DEREK J OfficerDirector | Sale | 278 | $20.66 | $5.7K | open → |
| 2026-06-17 | 2026-06-15 | MAETZOLD DEREK J OfficerDirector | Sale | 278 | $20.66 | $5.7K | open → |
| 2026-06-17 | 2026-06-15 | MAETZOLD DEREK J OfficerDirector | Sale | 278 | $20.66 | $5.7K | open → |
| 2026-06-17 | 2026-06-15 | MAETZOLD DEREK J OfficerDirector | Sale | 1,153 | $20.66 | $23.8K | open → |
| 2026-06-17 | 2026-06-15 | MAETZOLD DEREK J OfficerDirector | Sale | 1,357 | $20.66 | $28.0K | open → |
| 2026-06-17 | 2026-06-15 | MAETZOLD DEREK J OfficerDirector | Sale | 550 | $20.66 | $11.4K | open → |
| 2026-06-17 | 2026-06-15 | MAETZOLD DEREK J OfficerDirector | Exer. | 550 | $2.39 | $1.3K | 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 | 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 → |
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