CSTLCASTLE BIOSCIENCES INC
Insider trading & SEC Form 4 activity — last 90 days. Latest filing: 2026-09-03.
Insider buys (90d)
$0.00
Insider sells (90d)
$6.96M
Net flow
$-6.96M
Filings
19
Buy transactions
0
Sell transactions
91
Distinct insiders
4
Last close (cached)
$32.91
as of 2026-09-04
1d return
+0.8%
5d return
-1.8%
1m return
+8.0%
Top insiders trading CSTL (90d)
Recent transactions (50)
| Filed | Txn date | Insider | Code | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 2026-09-03 | 2026-09-01 | Oelschlager Kristen M Officer | Sale | 200 | $34.02 | $6.8K | open → |
| 2026-09-03 | 2026-09-01 | Oelschlager Kristen M Officer | Sale | 3,952 | $33.36 | $131.8K | open → |
| 2026-09-03 | 2026-09-01 | Oelschlager Kristen M Officer | Exer. | 4,152 | $3.38 | $14.0K | open → |
| 2026-09-02 | 2026-08-31 | Juvenal Tobin W Officer | Sale | 1,730 | $32.81 | $56.8K | open → |
| 2026-09-01 | 2026-08-28 | MAETZOLD DEREK J OfficerDirector | Sale | 21 | $33.88 | $711.48 | open → |
| 2026-09-01 | 2026-08-28 | MAETZOLD DEREK J OfficerDirector | Sale | 21 | $33.88 | $711.48 | open → |
| 2026-09-01 | 2026-08-28 | MAETZOLD DEREK J OfficerDirector | Sale | 21 | $33.88 | $711.48 | open → |
| 2026-09-01 | 2026-08-28 | MAETZOLD DEREK J OfficerDirector | Sale | 21 | $33.88 | $711.48 | open → |
| 2026-09-01 | 2026-08-28 | MAETZOLD DEREK J OfficerDirector | Sale | 177 | $33.88 | $6.0K | open → |
| 2026-09-01 | 2026-08-28 | MAETZOLD DEREK J OfficerDirector | Sale | 209 | $33.88 | $7.1K | open → |
| 2026-09-01 | 2026-08-28 | MAETZOLD DEREK J OfficerDirector | Sale | 956 | $33.88 | $32.4K | open → |
| 2026-09-01 | 2026-08-28 | MAETZOLD DEREK J OfficerDirector | Sale | 257 | $33.14 | $8.5K | open → |
| 2026-09-01 | 2026-08-28 | MAETZOLD DEREK J OfficerDirector | Sale | 257 | $33.14 | $8.5K | open → |
| 2026-09-01 | 2026-08-28 | MAETZOLD DEREK J OfficerDirector | Sale | 257 | $33.14 | $8.5K | open → |
| 2026-09-01 | 2026-08-28 | MAETZOLD DEREK J OfficerDirector | Sale | 257 | $33.14 | $8.5K | open → |
| 2026-09-01 | 2026-08-28 | MAETZOLD DEREK J OfficerDirector | Sale | 2,129 | $33.14 | $70.6K | open → |
| 2026-09-01 | 2026-08-28 | MAETZOLD DEREK J OfficerDirector | Sale | 2,505 | $33.14 | $83.0K | open → |
| 2026-09-01 | 2026-08-28 | MAETZOLD DEREK J OfficerDirector | Sale | 11,472 | $33.14 | $380.2K | open → |
| 2026-09-01 | 2026-08-28 | MAETZOLD DEREK J OfficerDirector | Exer. | 12,428 | $2.39 | $29.7K | open → |
| 2026-08-27 | 2026-08-25 | Juvenal Tobin W Officer | Sale | 9,050 | $35.04 | $317.1K | open → |
| 2026-08-26 | 2026-08-25 | Oelschlager Kristen M Officer | Sale | 5,223 | $34.64 | $180.9K | open → |
| 2026-08-26 | 2026-08-25 | Oelschlager Kristen M Officer | Sale | 7,161 | $34.26 | $245.4K | open → |
| 2026-08-26 | 2026-08-24 | Oelschlager Kristen M Officer | Sale | 12,218 | $33.69 | $411.6K | open → |
| 2026-08-19 | 2026-08-17 | Juvenal Tobin W Officer | Sale | 1,730 | $29.59 | $51.2K | open → |
| 2026-08-18 | 2026-08-14 | Stokes Frank Officer | Sale | 24,908 | $29.77 | $741.5K | open → |
| 2026-08-18 | 2026-08-14 | MAETZOLD DEREK J OfficerDirector | Sale | 278 | $30.02 | $8.3K | open → |
| 2026-08-18 | 2026-08-14 | MAETZOLD DEREK J OfficerDirector | Sale | 278 | $30.02 | $8.3K | open → |
| 2026-08-18 | 2026-08-14 | MAETZOLD DEREK J OfficerDirector | Sale | 278 | $30.02 | $8.3K | open → |
| 2026-08-18 | 2026-08-14 | MAETZOLD DEREK J OfficerDirector | Sale | 278 | $30.02 | $8.3K | open → |
| 2026-08-18 | 2026-08-14 | MAETZOLD DEREK J OfficerDirector | Sale | 2,306 | $30.02 | $69.2K | open → |
| 2026-08-18 | 2026-08-14 | MAETZOLD DEREK J OfficerDirector | Sale | 2,714 | $30.02 | $81.5K | open → |
| 2026-08-18 | 2026-08-14 | MAETZOLD DEREK J OfficerDirector | Sale | 1,100 | $30.02 | $33.0K | open → |
| 2026-08-18 | 2026-08-14 | MAETZOLD DEREK J OfficerDirector | Exer. | 1,100 | $2.39 | $2.6K | open → |
| 2026-08-06 | 2025-11-24 | Juvenal Tobin W Officer | Sale | 1,301 | $38.39 | $49.9K | open → |
| 2026-08-06 | 2026-08-05 | MAETZOLD DEREK J OfficerDirector | Sale | 473 | $30.68 | $14.5K | open → |
| 2026-08-06 | 2026-08-05 | MAETZOLD DEREK J OfficerDirector | Sale | 556 | $30.68 | $17.1K | open → |
| 2026-08-06 | 2026-08-05 | MAETZOLD DEREK J OfficerDirector | Sale | 2,546 | $30.68 | $78.1K | open → |
| 2026-08-06 | 2026-08-05 | MAETZOLD DEREK J OfficerDirector | Exer. | 2,546 | $2.39 | $6.1K | open → |
| 2026-08-06 | 2026-08-04 | MAETZOLD DEREK J OfficerDirector | Sale | 4,063 | $31.34 | $127.3K | open → |
| 2026-08-06 | 2026-08-04 | MAETZOLD DEREK J OfficerDirector | Sale | 4,782 | $31.34 | $149.8K | open → |
| 2026-08-06 | 2026-08-04 | MAETZOLD DEREK J OfficerDirector | Sale | 11,935 | $31.34 | $374.0K | open → |
| 2026-08-06 | 2026-08-04 | MAETZOLD DEREK J OfficerDirector | Sale | 2,866 | $30.79 | $88.2K | open → |
| 2026-08-06 | 2026-08-04 | MAETZOLD DEREK J OfficerDirector | Sale | 3,374 | $30.79 | $103.9K | open → |
| 2026-08-06 | 2026-08-04 | MAETZOLD DEREK J OfficerDirector | Sale | 8,421 | $30.79 | $259.3K | open → |
| 2026-08-06 | 2026-08-04 | MAETZOLD DEREK J OfficerDirector | Exer. | 20,356 | $2.39 | $48.7K | open → |
| 2026-08-05 | 2026-08-03 | Oelschlager Kristen M Officer | Sale | 1,100 | $30.62 | $33.7K | open → |
| 2026-08-05 | 2026-08-03 | Oelschlager Kristen M Officer | Sale | 4,486 | $30.00 | $134.6K | open → |
| 2026-08-05 | 2026-08-03 | Oelschlager Kristen M Officer | Sale | 3,000 | $29.12 | $87.4K | open → |
| 2026-08-04 | 2026-08-03 | Juvenal Tobin W Officer | Sale | 1,730 | $28.25 | $48.9K | open → |
| 2026-08-04 | 2026-07-31 | Juvenal Tobin W Officer | Sale | 1,891 | $30.26 | $57.2K | open → |
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