Nasdaq · CIK 0001447362
CSTL CASTLE BIOSCIENCES INC
Insider trading from SEC Form 4. Last filing 6 d ago. Close $34.42 on Oct 9, 2026, +90% from the 52-week low and -20% from the high.
CASTLE BIOSCIENCES INC (CSTL) has 124 SEC Form 4 filings on file from 5 insiders, the latest filed on Oct 7, 2026. In the last 90 days insiders made 0 open-market buys worth $0 and 9 open-market sells worth $2.9M, net -$2.9M.
77 open-market trades have been scored at CSTL. The newest: Derek J Maetzold (Pres. & Chief Exec. Officer) sold $516k of stock on Oct 5, 2026, filed Oct 7, 2026, scored 33 (weak), under a 10b5-1 plan. The largest of the 50 shown: Derek J Maetzold (Pres. & Chief Exec. Officer) sold $1.3M on Dec 15, 2025, scored 55 (moderate), under a 10b5-1 plan. 3 insiders sold within 14 days of each other around Oct 5, 2026.
CSTL closed at $34.42 on Oct 9, 2026, 90% above its 52-week low and 20% below its 52-week high.
25 Form 144 notices of planned sales are on file, the latest filed Jun 16, 2026.
Last 90 days
Net insider value
-$2.9M
more sold than bought
Buys
0
$0 by 0 insiders
Sells
9
$2.9M by 3 insiders
Insiders on file
5
with a Form 4 at this company
Price and insider trades, last year
CSTLOct 9, 2026 · close 34.42
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
Open-market buys and sells at CASTLE BIOSCIENCES INC, scored: the newest 50 of 77.
| Score | Insider | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 33Weak | Derek J Maetzold Pres. & Chief Exec. Officer sell | $516k 14,496 shares | -49% | +102% from low-15% from high | |
| 16Weak | Kristen M Oelschlager Chief Operating Officer sell | $149k 4,153 shares | -24% | +94% from low-18% from high | |
| 28Weak | Tobin W Juvenal Chief Commercial Officer sell | $232k 6,577 shares | -11% | +92% from low-19% from high | |
| 33Weak | Derek J Maetzold Pres. & Chief Exec. Officer sell | $512k 14,496 shares | -48% | +93% from low-19% from high | |
| 27Weak | Tobin W Juvenal Chief Commercial Officer sell | $223k 6,600 shares | -10% | - | |
| 32Weak | Derek J Maetzold Pres. & Chief Exec. Officer sell | $465k 14,518 shares | -48% | - | |
| 16Weak | Kristen M Oelschlager Chief Operating Officer sell | $139k 4,152 shares | -24% | - | |
| 17Weak | Tobin W Juvenal Chief Commercial Officer sell | $57k 1,730 shares | -3% | - | |
| 45Moderate | Derek J Maetzold Pres. & Chief Exec. Officer sell | $616k 18,560 shares | -55% | - | |
| 25Weak | Kristen M Oelschlager Chief Operating Officer sell | $178k 8,587 shares | -22% | +40% from low-52% from high | |
| 12Weak | Derek J Maetzold Pres. & Chief Exec. Officer sell | $86k 4,172 shares | -19% | +41% from low-52% from high | |
| 12Weak | Derek J Maetzold Pres. & Chief Exec. Officer sell | $205k 9,836 shares | -36% | +43% from low-51% from high | |
| 4Weak | Derek J Maetzold Pres. & Chief Exec. Officer sell | $84k 4,172 shares | -19% | +37% from low-53% from high | |
| 12Weak | Derek J Maetzold Pres. & Chief Exec. Officer sell | $218k 9,836 shares | -36% | +31% from low-55% from high | |
| 5Weak | Derek J Maetzold Pres. & Chief Exec. Officer sell | $105k 4,172 shares | -19% | +68% from low-43% from high | |
| 13Weak | Derek J Maetzold Pres. & Chief Exec. Officer sell | $246k 9,836 shares | -36% | +69% from low-43% from high | |
| 13Weak | Derek J Maetzold Pres. & Chief Exec. Officer sell | $107k 4,172 shares | -19% | +69% from low-43% from high | |
| 48Moderate | Derek J Maetzold Pres. & Chief Exec. Officer sell | $500k 19,300 shares | -47% | +77% from low-40% from high | |
| 52Moderate | Derek J Maetzold Pres. & Chief Exec. Officer sell | $792k 30,779 shares | -43% | +74% from low-41% from high | |
| 33Weak | Tobin W Juvenal Chief Commercial Officer sell | $527k 20,863 shares | -19% | +73% from low-41% from high | |
| 40Moderate | Derek J Maetzold Pres. & Chief Exec. Officer sell | $1.1M 44,125 shares | -39% | +78% from low-39% from high | |
| 37Weak | G Bradley Cole director sell | $211k 7,403 shares | -28% | +91% from low-35% from high | |
| 28Weak | Frank Stokes Chief Financial Officer sell | $168k 6,001 shares | -9% | +91% from low-35% from high | |
| 19Weak | Frank Stokes Chief Financial Officer sell | $192k 7,000 shares | -12% | +88% from low-36% from high | |
| 16Weak | Derek J Maetzold Pres. & Chief Exec. Officer sell | $159k 4,017 shares | -5% | +166% from low-10% from high | |
| 16Weak | Derek J Maetzold Pres. & Chief Exec. Officer sell | $161k 4,017 shares | -4% | +179% from low-1% from high | |
| 21Weak | Derek J Maetzold Pres. & Chief Exec. Officer sell | $156k 4,017 shares | -12% | +166% from low-6% from high | |
| 26Weak | Derek J Maetzold Pres. & Chief Exec. Officer sell | $33k 830 shares | -2% | +183% from low0% from high | |
| 74Notable | Kristen M Oelschlager Chief Operating Officer sell | $585k 14,888 shares | -55% | +171% from low-1% from high | |
| 20Weak | Derek J Maetzold Pres. & Chief Exec. Officer sell | $20k 509 shares | -1% | +171% from low-1% from high | |
| 55Moderate | Derek J Maetzold Pres. & Chief Exec. Officer sell | $1.3M 32,346 shares | -48% | +165% from low-3% from high | |
| 48Moderate | Frank Stokes Chief Financial Officer sell | $168k 4,496 shares | -8% | +159% from low-5% from high | |
| 53Moderate | Tobin W Juvenal Chief Commercial Officer sell | $495k 13,200 shares | -13% | +159% from low-5% from high | |
| 27Weak | Derek J Maetzold Pres. & Chief Exec. Officer sell | $54k 1,339 shares | -3% | +170% from low-1% from high | |
| 30Weak | Derek J Maetzold Pres. & Chief Exec. Officer sell | $105k 2,678 shares | -6% | +167% from low-2% from high | |
| 24Weak | Derek J Maetzold Pres. & Chief Exec. Officer sell | $171k 4,258 shares | -9% | +173% from low0% from high | |
| 37Weak | Derek J Maetzold Pres. & Chief Exec. Officer sell | $205k 5,115 shares | -10% | +173% from low0% from high | |
| 6Weak | Tobin W Juvenal Chief Commercial Officer sell | $167k 4,693 shares | -5% | +144% from low0% from high | |
| 29Weak | Derek J Maetzold Pres. & Chief Exec. Officer sell | $91k 2,678 shares | -5% | +129% from low-4% from high | |
| 0Weak | Tobin W Juvenal Chief Commercial Officer sell | $25k 700 shares | -1% | +139% from low0% from high | |
| 55Moderate | Kristen M Oelschlager Chief Operating Officer sell | $665k 18,932 shares | -61% | +139% from low0% from high | |
| 10Weak | Tobin W Juvenal Chief Commercial Officer sell | $25k 700 shares | -1% | +139% from low0% from high | |
| 34Weak | Frank Stokes Chief Financial Officer sell | $189k 5,388 shares | -11% | +139% from low0% from high | |
| 39Weak | Derek J Maetzold Pres. & Chief Exec. Officer sell | $289k 9,373 shares | -15% | +116% from low-6% from high | |
| 39Weak | Kristen M Oelschlager Chief Operating Officer sell | $317k 12,678 shares | -32% | +74% from low-26% from high | |
| 49Moderate | Kristen M Oelschlager Chief Operating Officer sell | $391k 18,007 shares | -15% | +52% from low-36% from high | |
| 18Weak | Derek J Maetzold Pres. & Chief Exec. Officer sell | $30k 1,339 shares | -2% | +57% from low-34% from high | |
| 10Weak | Derek J Maetzold Pres. & Chief Exec. Officer sell | $30k 1,339 shares | -2% | +52% from low-36% from high | |
| 10Weak | Derek J Maetzold Pres. & Chief Exec. Officer sell | $29k 1,339 shares | -2% | +49% from low-37% from high | |
| 18Weak | Derek J Maetzold Pres. & Chief Exec. Officer sell | $32k 1,339 shares | -2% | +65% from low-30% from high |
Planned sales
Form 144 notices filed before a sale of restricted or control stock, newest first. The sale itself usually reaches a Form 4 within days. All planned sales
| Filed | Seller | Shares | Value | Sale date | Past 3 months |
|---|---|---|---|---|---|
| Jun 16, 2026 | KRISTEN OELSCHLAGER Officer | 29,911 0.10% of outstanding | $618k | Jun 16, 2026 | none |
| Jun 1, 2026 | Derek Maetzold Officer | 14,008 0.05% of outstanding | $294k | Jun 1, 2026 | $3.2M |
| May 7, 2026 | Derek Maetzold Officer | 14,008 0.05% of outstanding | $270k | May 7, 2026 | $2.9M |
| Mar 26, 2026 | Derek Maetzold Officer | 18,180 0.06% of outstanding | $449k | Mar 26, 2026 | $2.9M |
| Mar 12, 2026 | Tobin Juvenal Chief Commercial Officer | 20,863 0.07% of outstanding | $528k | Mar 12, 2026 | $495k |
| Mar 11, 2026 | Derek Maetzold Officer | 94,204 0.32% of outstanding | $2.5M | Mar 11, 2026 | $1.8M |
| Mar 5, 2026 | GORDON B. COLE Director | 7,403 0.02% of outstanding | $211k | Mar 5, 2026 | none |
| Mar 5, 2026 | FRANKLIN STOKES Officer | 6,001 0.02% of outstanding | $169k | Mar 5, 2026 | $360k |
| Mar 3, 2026 | FRANKLIN STOKES Officer | 7,000 0.02% of outstanding | $196k | Mar 3, 2026 | $168k |
| Jan 5, 2026 | Derek Maetzold Officer | 12,051 0.04% of outstanding | $470k | Jan 5, 2026 | $2.2M |
| Dec 17, 2025 | Kristen M. Oelschlager Officer | 14,888 0.05% of outstanding | $581k | Dec 17, 2025 | $982k |
| Dec 15, 2025 | Derek Maetzold Officer | 33,685 0.12% of outstanding | $1.3M | Dec 15, 2025 | $1.0M |
| Dec 11, 2025 | FRANKLIN M. STOKES Officer | 4,496 0.02% of outstanding | $168k | Dec 11, 2025 | $189k |
| Dec 11, 2025 | TOBIN JUVENAL Officer | 13,200 0.05% of outstanding | $495k | Dec 11, 2025 | $192k |
| Nov 25, 2025 | Derek Maetzold Officer | 10,712 0.04% of outstanding | $428k | Nov 25, 2025 | $609k |
| Nov 24, 2025 | TOBIN JUVENAL Officer | 1,301 0.00% of outstanding | $49k | Nov 24, 2025 | $192k |
| Nov 12, 2025 | FRANKLIN STOKES Officer | 5,388 0.02% of outstanding | $187k | Nov 11, 2025 | none |
| Nov 12, 2025 | TOBIN JUVENAL Officer | 5,393 0.02% of outstanding | $187k | Nov 11, 2025 | none |
| Nov 12, 2025 | Kristen M. Oelschlager Officer | 18,932 0.06% of outstanding | $658k | Nov 11, 2025 | $987k |
| Nov 4, 2025 | Derek Maetzold Officer | 13,390 0.05% of outstanding | $424k | Nov 4, 2025 | $1.0M |
| Oct 2, 2025 | Derek Maetzold Officer | 4,017 0.01% of outstanding | $89k | Oct 2, 2025 | $925k |
| Aug 27, 2025 | Kristen M. Oelschlager Officer | 25,355 0.09% of outstanding | $541k | Aug 27, 2025 | none |
| Aug 27, 2025 | Kristen M. Oelschlager Officer | 18,007 0.06% of outstanding | $384k | Aug 27, 2025 | none |
| Aug 15, 2025 | Derek Maetzold Officer | 4,017 0.01% of outstanding | $81k | Aug 15, 2025 | $1.3M |
| Aug 13, 2025 | Derek Maetzold Officer | 43,019 0.15% of outstanding | $835k | Aug 13, 2025 | $458k |
Transactions
The newest 50 of 564 rows filed, every code.
| Date | Insider | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Oct 5, 2026 | Derek J Maetzold Pres. & Chief Exec. Officer | MOption exercise Common Stock10b5-1 | +8,165 | $2.39 | $20k | 29,644 | 6 d ago |
| Oct 5, 2026 | Derek J Maetzold Pres. & Chief Exec. Officer | SOpen-market sale Common Stock10b5-1 | -8,580 | $35.57 | $305k | 21,064 | 6 d ago |
| Oct 5, 2026 | Derek J Maetzold Pres. & Chief Exec. Officer | SOpen-market sale Common Stockindirect: By The Maetzold Descendants 2020 Trust10b5-1 | -3,198 | $35.57 | $114k | 8,038 | 6 d ago |
| Oct 5, 2026 | Derek J Maetzold Pres. & Chief Exec. Officer | SOpen-market sale Common Stockindirect: By Derek Maetzold 2020 Irrevocable Trust10b5-1 | -2,718 | $35.57 | $97k | 6,832 | 6 d ago |
| Oct 5, 2026 | Derek J Maetzold Pres. & Chief Exec. Officer | MOption exercise Stock option (right to buy)derivative10b5-1 | -8,165 | $0.00 | $0 | 0 | 6 d ago |
| Oct 1, 2026 | Kristen M Oelschlager Chief Operating Officer | MOption exercise Common Stock10b5-1 | +4,153 | $3.38 | $14k | 17,509 | 8 d ago |
| Oct 1, 2026 | Kristen M Oelschlager Chief Operating Officer | SOpen-market sale Common Stock10b5-1 | -2,807 | $35.75 | $100k | 14,702 | 8 d ago |
| Oct 1, 2026 | Kristen M Oelschlager Chief Operating Officer | SOpen-market sale Common Stock10b5-1 | -1,346 | $36.38 | $49k | 13,356 | 8 d ago |
| Oct 1, 2026 | Kristen M Oelschlager Chief Operating Officer | MOption exercise Stock option (right to buy)derivative10b5-1 | -4,153 | $0.00 | $0 | 8,305 | 8 d ago |
| Sep 29, 2026 | Tobin W Juvenal Chief Commercial Officer | SOpen-market sale Common Stock10b5-1 | -5,543 | $35.50 | $197k | 53,041 | 12 d ago |
| Sep 30, 2026 | Tobin W Juvenal Chief Commercial Officer | SOpen-market sale Common Stock10b5-1 | -1,034 | $34.20 | $35k | 52,007 | 12 d ago |
| Sep 21, 2026 | Derek J Maetzold Pres. & Chief Exec. Officer | MOption exercise Common Stock10b5-1 | +8,580 | $2.39 | $21k | 30,059 | 20 d ago |
| Sep 21, 2026 | Derek J Maetzold Pres. & Chief Exec. Officer | SOpen-market sale Common Stock10b5-1 | -8,580 | $35.33 | $303k | 21,479 | 20 d ago |
| Sep 21, 2026 | Derek J Maetzold Pres. & Chief Exec. Officer | SOpen-market sale Common Stockindirect: By The Maetzold Descendants 2020 Trust10b5-1 | -3,198 | $35.33 | $113k | 11,236 | 20 d ago |
| Sep 21, 2026 | Derek J Maetzold Pres. & Chief Exec. Officer | SOpen-market sale Common Stockindirect: By Derek Maetzold 2020 Irrevocable Trust10b5-1 | -2,718 | $35.33 | $96k | 9,550 | 20 d ago |
| Sep 21, 2026 | Derek J Maetzold Pres. & Chief Exec. Officer | MOption exercise Stock option (right to buy)derivative10b5-1 | -8,580 | $0.00 | $0 | 8,165 | 20 d ago |
| Sep 14, 2026 | Tobin W Juvenal Chief Commercial Officer | SOpen-market sale Common Stock10b5-1 | -3,306 | $32.32 | $107k | 61,878 | 27 d ago |
| Sep 15, 2026 | Tobin W Juvenal Chief Commercial Officer | SOpen-market sale Common Stock10b5-1 | -3,294 | $35.14 | $116k | 58,584 | 27 d ago |
| Sep 11, 2026 | Derek J Maetzold Pres. & Chief Exec. Officer | MOption exercise Common Stock10b5-1 | +8,584 | $2.39 | $21k | 30,063 | 28 d ago |
| Sep 11, 2026 | Derek J Maetzold Pres. & Chief Exec. Officer | SOpen-market sale Common Stock10b5-1 | -8,361 | $32.00 | $268k | 21,702 | 28 d ago |
| Sep 11, 2026 | Derek J Maetzold Pres. & Chief Exec. Officer | SOpen-market sale Common Stockindirect: By The Maetzold Descendants 2020 Trust10b5-1 | -3,124 | $32.00 | $100k | 14,517 | 28 d ago |
| Sep 11, 2026 | Derek J Maetzold Pres. & Chief Exec. Officer | SOpen-market sale Common Stockindirect: By Derek Maetzold 2020 Irrevocable Trust10b5-1 | -2,656 | $32.00 | $85k | 12,339 | 28 d ago |
| Sep 11, 2026 | Derek J Maetzold Pres. & Chief Exec. Officer | SOpen-market sale Common Stock10b5-1 | -223 | $32.78 | $7,310 | 21,479 | 28 d ago |
| Sep 11, 2026 | Derek J Maetzold Pres. & Chief Exec. Officer | SOpen-market sale Common Stockindirect: By The Maetzold Descendants 2020 Trust10b5-1 | -83 | $32.78 | $2,721 | 14,434 | 28 d ago |
| Sep 11, 2026 | Derek J Maetzold Pres. & Chief Exec. Officer | SOpen-market sale Common Stockindirect: By Derek Maetzold 2020 Irrevocable Trust10b5-1 | -71 | $32.78 | $2,327 | 12,268 | 28 d ago |
| Sep 11, 2026 | Derek J Maetzold Pres. & Chief Exec. Officer | MOption exercise Stock option (right to buy)derivative10b5-1 | -8,584 | $0.00 | $0 | 16,745 | 28 d ago |
| Sep 1, 2026 | Kristen M Oelschlager Chief Operating Officer | MOption exercise Common Stock10b5-1 | +4,152 | $3.38 | $14k | 17,508 | 40 d ago |
| Sep 1, 2026 | Kristen M Oelschlager Chief Operating Officer | SOpen-market sale Common Stock10b5-1 | -3,952 | $33.36 | $132k | 13,556 | 40 d ago |
| Sep 1, 2026 | Kristen M Oelschlager Chief Operating Officer | SOpen-market sale Common Stock10b5-1 | -200 | $34.02 | $6,804 | 13,356 | 40 d ago |
| Sep 1, 2026 | Kristen M Oelschlager Chief Operating Officer | MOption exercise Stock option (right to buy)derivative10b5-1 | -4,152 | $0.00 | $0 | 12,458 | 40 d ago |
| Aug 31, 2026 | Tobin W Juvenal Chief Commercial Officer | SOpen-market sale Common Stock10b5-1 | -1,730 | $32.81 | $57k | 65,184 | 41 d ago |
| Aug 28, 2026 | Derek J Maetzold Pres. & Chief Exec. Officer | MOption exercise Common Stock10b5-1 | +12,428 | $2.39 | $30k | 33,907 | 42 d ago |
| Aug 28, 2026 | Derek J Maetzold Pres. & Chief Exec. Officer | SOpen-market sale Common Stock10b5-1 | -11,472 | $33.14 | $380k | 22,435 | 42 d ago |
| Aug 28, 2026 | Derek J Maetzold Pres. & Chief Exec. Officer | SOpen-market sale Common Stockindirect: By The Maetzold Descendants 2020 Trust10b5-1 | -2,505 | $33.14 | $83k | 17,850 | 42 d ago |
| Aug 28, 2026 | Derek J Maetzold Pres. & Chief Exec. Officer | SOpen-market sale Common Stockindirect: By Derek Maetzold 2020 Irrevocable Trust10b5-1 | -2,129 | $33.14 | $71k | 15,172 | 42 d ago |
| Aug 28, 2026 | Derek J Maetzold Pres. & Chief Exec. Officer | SOpen-market sale Common Stockindirect: By The Maetzold 2018 Remainder Trust FBO Emily Carol Kirk10b5-1 | -257 | $33.14 | $8,517 | 11,277 | 42 d ago |
| Aug 28, 2026 | Derek J Maetzold Pres. & Chief Exec. Officer | SOpen-market sale Common Stockindirect: By The Maetzold 2018 Remainder Trust FBO Hannah Elizabeth Maetzold10b5-1 | -257 | $33.14 | $8,517 | 11,277 | 42 d ago |
| Aug 28, 2026 | Derek J Maetzold Pres. & Chief Exec. Officer | SOpen-market sale Common Stockindirect: By The Maetzold 2018 Remainder Trust FBO John Derek Maetzold10b5-1 | -257 | $33.14 | $8,517 | 11,277 | 42 d ago |
| Aug 28, 2026 | Derek J Maetzold Pres. & Chief Exec. Officer | SOpen-market sale Common Stockindirect: By The Maetzold 2018 Remainder Trust FBO Peter Douglas Maetzold10b5-1 | -257 | $33.14 | $8,517 | 11,277 | 42 d ago |
| Aug 28, 2026 | Derek J Maetzold Pres. & Chief Exec. Officer | SOpen-market sale Common Stock10b5-1 | -956 | $33.88 | $32k | 21,479 | 42 d ago |
| Aug 28, 2026 | Derek J Maetzold Pres. & Chief Exec. Officer | SOpen-market sale Common Stockindirect: By The Maetzold Descendants 2020 Trust10b5-1 | -209 | $33.88 | $7,081 | 17,641 | 42 d ago |
| Aug 28, 2026 | Derek J Maetzold Pres. & Chief Exec. Officer | SOpen-market sale Common Stockindirect: By Derek Maetzold 2020 Irrevocable Trust10b5-1 | -177 | $33.88 | $5,997 | 14,995 | 42 d ago |
| Aug 28, 2026 | Derek J Maetzold Pres. & Chief Exec. Officer | SOpen-market sale Common Stockindirect: By The Maetzold 2018 Remainder Trust FBO Emily Carol Kirk10b5-1 | -21 | $33.88 | $711 | 11,256 | 42 d ago |
| Aug 28, 2026 | Derek J Maetzold Pres. & Chief Exec. Officer | SOpen-market sale Common Stockindirect: By The Maetzold 2018 Remainder Trust FBO Hannah Elizabeth Maetzold10b5-1 | -21 | $33.88 | $711 | 11,256 | 42 d ago |
| Aug 28, 2026 | Derek J Maetzold Pres. & Chief Exec. Officer | SOpen-market sale Common Stockindirect: By The Maetzold 2018 Remainder Trust FBO John Derek Maetzold10b5-1 | -21 | $33.88 | $711 | 11,256 | 42 d ago |
| Aug 28, 2026 | Derek J Maetzold Pres. & Chief Exec. Officer | SOpen-market sale Common Stockindirect: By The Maetzold 2018 Remainder Trust FBO Peter Douglas Maetzold10b5-1 | -21 | $33.88 | $711 | 11,256 | 42 d ago |
| Aug 28, 2026 | Derek J Maetzold Pres. & Chief Exec. Officer | MOption exercise Stock option (right to buy)derivative10b5-1 | -12,428 | $0.00 | $0 | 25,329 | 42 d ago |
| Jun 16, 2026 | Kristen M Oelschlager Chief Operating Officer | SOpen-market sale Common Stock10b5-1 | -8,587 | $20.71 | $178k | 30,460 | Jun 18, 2026 |
| Jun 15, 2026 | Derek J Maetzold Pres. & Chief Exec. Officer | MOption exercise Common Stock10b5-1 | +550 | $2.39 | $1,315 | 22,029 | Jun 17, 2026 |
| Jun 15, 2026 | Derek J Maetzold Pres. & Chief Exec. Officer | SOpen-market sale Common Stock10b5-1 | -550 | $20.66 | $11k | 21,479 | Jun 17, 2026 |
50 of 564 rows shown.
Insiders
Everyone who has filed a Form 4 here.
- G Bradley Coledirector
- Tobin W JuvenalChief Commercial Officer
- Derek J MaetzoldPres. & Chief Exec. Officer
- Kristen M OelschlagerChief Operating Officer
- Frank StokesChief Financial Officer
Questions about CSTL
Answered from the filings on this page, as of the latest one.
Are insiders buying CSTL?
As of Oct 7, 2026, SEC Form 4 filings show 0 open-market buys worth $0 by 0 insiders and 9 open-market sells worth $2.9M by 3 insiders at CASTLE BIOSCIENCES INC in the last 90 days, net -$2.9M. Only purchases (code P) and sales (code S) count; grants, option exercises and tax withholding do not.
Who was the last insider to trade CSTL on the open market?
Derek J Maetzold (Pres. & Chief Exec. Officer) sold $516k of CSTL on Oct 5, 2026 and filed the Form 4 on Oct 7, 2026. InsiderTell scored 33 (weak), under a 10b5-1 plan, with 3 insiders on the same side within 14 days.
How many insiders file Form 4 at CASTLE BIOSCIENCES INC?
5 people have filed a Form 4 at CASTLE BIOSCIENCES INC, among them G Bradley Cole (director), Tobin W Juvenal (Chief Commercial Officer), Derek J Maetzold (Pres. & Chief Exec. Officer). Officers, directors and holders of more than 10% of a share class must report their trades within two business days.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.