Insider · CIK 0001239501
Derek J Maetzold
ceoofficerdirector
Files at CSTL (CASTLE BIOSCIENCES INC). First filing Oct 16, 2024, latest Oct 7, 2026.
In brief
Derek J Maetzold files SEC Form 4 as CEO and director at CSTL (CASTLE BIOSCIENCES INC). Since Oct 16, 2024, Derek J Maetzold has reported 0 open-market buys worth $0 and 52 open-market sells worth $16M, the latest filed on Oct 7, 2026.
A track record needs three past buys with six months of prices behind them; Derek J Maetzold has 0, so none is measured yet.
The newest scored trade: sold $516k of CSTL on Oct 5, 2026, filed Oct 7, 2026, scored 33 (weak), under a 10b5-1 plan. In the last 12 months: 0 buys worth $0 and 33 sells worth $11M.
Track record
Not enough history
Fewer than three past buys with six months of prices.
Median 6-month excess
-
after past buys, n = 0
Hit rate
-
past buys that beat the index over 6 months
Open-market trades
0 / 52
$0 bought, $16M sold
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
CSTL: CASTLE BIOSCIENCES INC
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
This insider’s open-market buys and sells, scored: the newest 50 of 52.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 33Weak | CASTLE BIOSCIENCES INC | $516k 14,496 shares | -49% | +102% from low-15% from high | |
| 33Weak | CASTLE BIOSCIENCES INC | $512k 14,496 shares | -48% | +93% from low-19% from high | |
| 32Weak | CASTLE BIOSCIENCES INC | $465k 14,518 shares | -48% | - | |
| 45Moderate | CASTLE BIOSCIENCES INC | $616k 18,560 shares | -55% | +85% from low-22% from high | |
| 27Weak | CASTLE BIOSCIENCES INC | $217k 7,232 shares | -32% | +63% from low-31% from high | |
| 50Moderate | CASTLE BIOSCIENCES INC | $1.2M 39,016 shares | -93% | +104% from low-28% from high | |
| 48Moderate | CASTLE BIOSCIENCES INC | $867k 28,646 shares | -102% | +91% from low-35% from high | |
| 28Weak | CASTLE BIOSCIENCES INC | $238k 9,836 shares | -36% | +67% from low-43% from high | |
| 13Weak | CASTLE BIOSCIENCES INC | $96k 4,172 shares | -19% | +58% from low-46% from high | |
| 21Weak | CASTLE BIOSCIENCES INC | $239k 9,836 shares | -36% | +69% from low-43% from high | |
| 12Weak | CASTLE BIOSCIENCES INC | $86k 4,172 shares | -19% | +41% from low-52% from high | |
| 12Weak | CASTLE BIOSCIENCES INC | $205k 9,836 shares | -36% | +43% from low-51% from high | |
| 4Weak | CASTLE BIOSCIENCES INC | $84k 4,172 shares | -19% | +37% from low-53% from high | |
| 12Weak | CASTLE BIOSCIENCES INC | $218k 9,836 shares | -36% | +31% from low-55% from high | |
| 5Weak | CASTLE BIOSCIENCES INC | $105k 4,172 shares | -19% | +68% from low-43% from high | |
| 13Weak | CASTLE BIOSCIENCES INC | $246k 9,836 shares | -36% | +69% from low-43% from high | |
| 13Weak | CASTLE BIOSCIENCES INC | $107k 4,172 shares | -19% | +69% from low-43% from high | |
| 48Moderate | CASTLE BIOSCIENCES INC | $500k 19,300 shares | -47% | +77% from low-40% from high | |
| 52Moderate | CASTLE BIOSCIENCES INC | $792k 30,779 shares | -43% | +74% from low-41% from high | |
| 40Moderate | CASTLE BIOSCIENCES INC | $1.1M 44,125 shares | -39% | +78% from low-39% from high | |
| 16Weak | CASTLE BIOSCIENCES INC | $159k 4,017 shares | -5% | +166% from low-10% from high | |
| 16Weak | CASTLE BIOSCIENCES INC | $161k 4,017 shares | -4% | +179% from low-1% from high | |
| 21Weak | CASTLE BIOSCIENCES INC | $156k 4,017 shares | -12% | +166% from low-6% from high | |
| 26Weak | CASTLE BIOSCIENCES INC | $33k 830 shares | -2% | +183% from low0% from high | |
| 20Weak | CASTLE BIOSCIENCES INC | $20k 509 shares | -1% | +171% from low-1% from high | |
| 55Moderate | CASTLE BIOSCIENCES INC | $1.3M 32,346 shares | -48% | +165% from low-3% from high | |
| 27Weak | CASTLE BIOSCIENCES INC | $54k 1,339 shares | -3% | +170% from low-1% from high | |
| 30Weak | CASTLE BIOSCIENCES INC | $105k 2,678 shares | -6% | +167% from low-2% from high | |
| 24Weak | CASTLE BIOSCIENCES INC | $171k 4,258 shares | -9% | +173% from low0% from high | |
| 37Weak | CASTLE BIOSCIENCES INC | $205k 5,115 shares | -10% | +173% from low0% from high | |
| 29Weak | CASTLE BIOSCIENCES INC | $91k 2,678 shares | -5% | +129% from low-4% from high | |
| 39Weak | CASTLE BIOSCIENCES INC | $289k 9,373 shares | -15% | +116% from low-6% from high | |
| 18Weak | CASTLE BIOSCIENCES INC | $30k 1,339 shares | -2% | +57% from low-34% from high | |
| 10Weak | CASTLE BIOSCIENCES INC | $30k 1,339 shares | -2% | +52% from low-36% from high | |
| 10Weak | CASTLE BIOSCIENCES INC | $29k 1,339 shares | -2% | +49% from low-37% from high | |
| 18Weak | CASTLE BIOSCIENCES INC | $32k 1,339 shares | -2% | +65% from low-30% from high | |
| 18Weak | CASTLE BIOSCIENCES INC | $27k 1,339 shares | -2% | +37% from low-42% from high | |
| 46Moderate | CASTLE BIOSCIENCES INC | $839k 43,019 shares | -38% | +32% from low-44% from high | |
| 32Weak | CASTLE BIOSCIENCES INC | $458k 22,576 shares | -30% | +29% from low-41% from high | |
| 15Weak | CASTLE BIOSCIENCES INC | $121k 5,644 shares | -7% | +14% from low-39% from high | |
| 15Weak | CASTLE BIOSCIENCES INC | $114k 5,644 shares | -7% | +0% from low-46% from high | |
| 15Weak | CASTLE BIOSCIENCES INC | $115k 5,644 shares | -7% | +7% from low-42% from high | |
| 34Weak | CASTLE BIOSCIENCES INC | $586k 29,177 shares | -28% | - | |
| 8Weak | CASTLE BIOSCIENCES INC | $119k 5,687 shares | -5% | - | |
| 28Weak | CASTLE BIOSCIENCES INC | $72k 2,565 shares | -3% | - | |
| 33Weak | CASTLE BIOSCIENCES INC | $228k 7,689 shares | -9% | - | |
| 26Weak | CASTLE BIOSCIENCES INC | $265k 9,364 shares | -10% | - | |
| 40Moderate | CASTLE BIOSCIENCES INC | $750k 26,123 shares | -22% | - | |
| 24Weak | CASTLE BIOSCIENCES INC | $161k 5,127 shares | -6% | - | |
| 32Weak | CASTLE BIOSCIENCES INC | $175k 5,127 shares | -6% | - |
Planned sales
Form 144 notices this insider filed before selling restricted or control stock, newest first.
| Filed | Company | Shares | Value | Sale date | Past 3 months |
|---|---|---|---|---|---|
| Oct 5, 2026 | CSTL Castle Biosciences, Inc. | 28,992 0.09% of outstanding | $1.1M | Oct 5, 2026 | $4.5M |
| Sep 11, 2026 | CSTL Castle Biosciences, Inc. | 29,014 0.10% of outstanding | $938k | Sep 11, 2026 | $3.6M |
| Aug 14, 2026 | CSTL Castle Biosciences, Inc. | 25,792 0.08% of outstanding | $764k | Aug 14, 2026 | $3.0M |
| Jul 31, 2026 | CSTL Castle Biosciences, Inc. | 67,662 0.22% of outstanding | $1.9M | Jul 31, 2026 | $1.2M |
| Jul 1, 2026 | CSTL Castle Biosciences, Inc. | 23,844 0.08% of outstanding | $589k | Jul 1, 2026 | $942k |
| Jun 1, 2026 | CSTL Castle Biosciences, Inc. | 14,008 0.05% of outstanding | $294k | Jun 1, 2026 | $3.2M |
| May 7, 2026 | CSTL Castle Biosciences, Inc. | 14,008 0.05% of outstanding | $270k | May 7, 2026 | $2.9M |
| Mar 26, 2026 | CSTL Castle Biosciences, Inc. | 18,180 0.06% of outstanding | $449k | Mar 26, 2026 | $2.9M |
| Mar 11, 2026 | CSTL Castle Biosciences, Inc. | 94,204 0.32% of outstanding | $2.5M | Mar 11, 2026 | $1.8M |
| Jan 5, 2026 | CSTL Castle Biosciences, Inc. | 12,051 0.04% of outstanding | $470k | Jan 5, 2026 | $2.2M |
| Dec 15, 2025 | CSTL Castle Biosciences, Inc. | 33,685 0.12% of outstanding | $1.3M | Dec 15, 2025 | $1.0M |
| Nov 25, 2025 | CSTL Castle Biosciences, Inc. | 10,712 0.04% of outstanding | $428k | Nov 25, 2025 | $609k |
| Nov 4, 2025 | CSTL Castle Biosciences, Inc. | 13,390 0.05% of outstanding | $424k | Nov 4, 2025 | $1.0M |
| Oct 2, 2025 | CSTL Castle Biosciences, Inc. | 4,017 0.01% of outstanding | $89k | Oct 2, 2025 | $925k |
| Aug 15, 2025 | CSTL Castle Biosciences, Inc. | 4,017 0.01% of outstanding | $81k | Aug 15, 2025 | $1.3M |
| Aug 13, 2025 | CSTL Castle Biosciences, Inc. | 43,019 0.15% of outstanding | $835k | Aug 13, 2025 | $458k |
| Jun 27, 2025 | CSTL Castle Biosciences, Inc. | 16,932 0.06% of outstanding | $345k | Jun 27, 2025 | $235k |
| Apr 8, 2025 | CSTL Castle Biosciences, Inc. | 16,932 0.06% of outstanding | $315k | Apr 8, 2025 | $859k |
| Mar 7, 2025 | CSTL Castle Biosciences, Inc. | 34,821 0.12% of outstanding | $704k | Mar 7, 2025 | $1.4M |
| Mar 4, 2025 | CSTL Castle Biosciences, Inc. | 5,687 0.02% of outstanding | $126k | Mar 4, 2025 | $1.5M |
| Dec 13, 2024 | CSTL Castle Biosciences, Inc. | 48,303 0.17% of outstanding | $1.4M | Dec 13, 2024 | $631k |
| Nov 4, 2024 | CSTL Castle Biosciences, Inc. | 15,381 0.06% of outstanding | $517k | Nov 4, 2024 | $631k |
| Dec 13, 2023 | CSTL Castle Biosciences, Inc. | 67,206 0.25% of outstanding | $1.4M | Dec 13, 2023 | $864k |
| Nov 20, 2023 | CSTL Castle Biosciences, Inc. | 76,096 0.28% of outstanding | $1.5M | Nov 20, 2023 | $270k |
Transactions
The newest 50 of 409 rows this insider has filed.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Oct 5, 2026 | CSTL CASTLE BIOSCIENCES INC | MOption exercise Common Stock10b5-1 | +8,165 | $2.39 | $20k | 29,644 | 6 d ago |
| Oct 5, 2026 | CSTL CASTLE BIOSCIENCES INC | SOpen-market sale Common Stock10b5-1 | -8,580 | $35.57 | $305k | 21,064 | 6 d ago |
| Oct 5, 2026 | CSTL CASTLE BIOSCIENCES INC | 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 | CSTL CASTLE BIOSCIENCES INC | 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 | CSTL CASTLE BIOSCIENCES INC | MOption exercise Stock option (right to buy)derivative10b5-1 | -8,165 | $0.00 | $0 | 0 | 6 d ago |
| Sep 21, 2026 | CSTL CASTLE BIOSCIENCES INC | MOption exercise Common Stock10b5-1 | +8,580 | $2.39 | $21k | 30,059 | 20 d ago |
| Sep 21, 2026 | CSTL CASTLE BIOSCIENCES INC | SOpen-market sale Common Stock10b5-1 | -8,580 | $35.33 | $303k | 21,479 | 20 d ago |
| Sep 21, 2026 | CSTL CASTLE BIOSCIENCES INC | 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 | CSTL CASTLE BIOSCIENCES INC | 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 | CSTL CASTLE BIOSCIENCES INC | MOption exercise Stock option (right to buy)derivative10b5-1 | -8,580 | $0.00 | $0 | 8,165 | 20 d ago |
| Sep 11, 2026 | CSTL CASTLE BIOSCIENCES INC | MOption exercise Common Stock10b5-1 | +8,584 | $2.39 | $21k | 30,063 | 28 d ago |
| Sep 11, 2026 | CSTL CASTLE BIOSCIENCES INC | SOpen-market sale Common Stock10b5-1 | -8,361 | $32.00 | $268k | 21,702 | 28 d ago |
| Sep 11, 2026 | CSTL CASTLE BIOSCIENCES INC | 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 | CSTL CASTLE BIOSCIENCES INC | 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 | CSTL CASTLE BIOSCIENCES INC | SOpen-market sale Common Stock10b5-1 | -223 | $32.78 | $7,310 | 21,479 | 28 d ago |
| Sep 11, 2026 | CSTL CASTLE BIOSCIENCES INC | 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 | CSTL CASTLE BIOSCIENCES INC | 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 | CSTL CASTLE BIOSCIENCES INC | MOption exercise Stock option (right to buy)derivative10b5-1 | -8,584 | $0.00 | $0 | 16,745 | 28 d ago |
| Aug 28, 2026 | CSTL CASTLE BIOSCIENCES INC | MOption exercise Common Stock10b5-1 | +12,428 | $2.39 | $30k | 33,907 | 42 d ago |
| Aug 28, 2026 | CSTL CASTLE BIOSCIENCES INC | SOpen-market sale Common Stock10b5-1 | -11,472 | $33.14 | $380k | 22,435 | 42 d ago |
| Aug 28, 2026 | CSTL CASTLE BIOSCIENCES INC | 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 | CSTL CASTLE BIOSCIENCES INC | 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 | CSTL CASTLE BIOSCIENCES INC | 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 | CSTL CASTLE BIOSCIENCES INC | 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 | CSTL CASTLE BIOSCIENCES INC | 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 | CSTL CASTLE BIOSCIENCES INC | 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 | CSTL CASTLE BIOSCIENCES INC | SOpen-market sale Common Stock10b5-1 | -956 | $33.88 | $32k | 21,479 | 42 d ago |
| Aug 28, 2026 | CSTL CASTLE BIOSCIENCES INC | 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 | CSTL CASTLE BIOSCIENCES INC | 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 | CSTL CASTLE BIOSCIENCES INC | 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 | CSTL CASTLE BIOSCIENCES INC | 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 | CSTL CASTLE BIOSCIENCES INC | 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 | CSTL CASTLE BIOSCIENCES INC | 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 | CSTL CASTLE BIOSCIENCES INC | MOption exercise Stock option (right to buy)derivative10b5-1 | -12,428 | $0.00 | $0 | 25,329 | 42 d ago |
| Aug 14, 2026 | CSTL CASTLE BIOSCIENCES INC | MOption exercise Common Stock10b5-1 | +1,100 | $2.39 | $2,629 | 22,579 | Aug 18, 2026 |
| Aug 14, 2026 | CSTL CASTLE BIOSCIENCES INC | SOpen-market sale Common Stock10b5-1 | -1,100 | $30.02 | $33k | 21,479 | Aug 18, 2026 |
| Aug 14, 2026 | CSTL CASTLE BIOSCIENCES INC | SOpen-market sale Common Stockindirect: By The Maetzold Descendants 2020 Trust10b5-1 | -2,714 | $30.02 | $81k | 20,355 | Aug 18, 2026 |
| Aug 14, 2026 | CSTL CASTLE BIOSCIENCES INC | SOpen-market sale Common Stockindirect: By Derek Maetzold 2020 Irrevocable Trust10b5-1 | -2,306 | $30.02 | $69k | 17,301 | Aug 18, 2026 |
| Aug 14, 2026 | CSTL CASTLE BIOSCIENCES INC | SOpen-market sale Common Stockindirect: By The Maetzold 2018 Remainder Trust FBO Emily Carol Kirk10b5-1 | -278 | $30.02 | $8,346 | 11,534 | Aug 18, 2026 |
| Aug 14, 2026 | CSTL CASTLE BIOSCIENCES INC | SOpen-market sale Common Stockindirect: By The Maetzold 2018 Remainder Trust FBO Hannah Elizabeth Maetzold10b5-1 | -278 | $30.02 | $8,346 | 11,534 | Aug 18, 2026 |
| Aug 14, 2026 | CSTL CASTLE BIOSCIENCES INC | SOpen-market sale Common Stockindirect: By The Maetzold 2018 Remainder Trust FBO John Derek Maetzold10b5-1 | -278 | $30.02 | $8,346 | 11,534 | Aug 18, 2026 |
| Aug 14, 2026 | CSTL CASTLE BIOSCIENCES INC | SOpen-market sale Common Stockindirect: By The Maetzold 2018 Remainder Trust FBO Peter Douglas Maetzold10b5-1 | -278 | $30.02 | $8,346 | 11,534 | Aug 18, 2026 |
| Aug 14, 2026 | CSTL CASTLE BIOSCIENCES INC | MOption exercise Stock option (right to buy)derivative10b5-1 | -1,100 | $0.00 | $0 | 37,757 | Aug 18, 2026 |
| Aug 4, 2026 | CSTL CASTLE BIOSCIENCES INC | MOption exercise Common Stock10b5-1 | +20,356 | $2.39 | $49k | 41,835 | Aug 6, 2026 |
| Aug 4, 2026 | CSTL CASTLE BIOSCIENCES INC | SOpen-market sale Common Stock10b5-1 | -8,421 | $30.79 | $259k | 33,414 | Aug 6, 2026 |
| Aug 4, 2026 | CSTL CASTLE BIOSCIENCES INC | SOpen-market sale Common Stockindirect: By The Maetzold Descendants 2020 Trust10b5-1 | -3,374 | $30.79 | $104k | 28,407 | Aug 6, 2026 |
| Aug 4, 2026 | CSTL CASTLE BIOSCIENCES INC | SOpen-market sale Common Stockindirect: By Derek Maetzold 2020 Irrevocable Trust10b5-1 | -2,866 | $30.79 | $88k | 24,143 | Aug 6, 2026 |
| Aug 4, 2026 | CSTL CASTLE BIOSCIENCES INC | SOpen-market sale Common Stock10b5-1 | -11,935 | $31.34 | $374k | 21,479 | Aug 6, 2026 |
| Aug 4, 2026 | CSTL CASTLE BIOSCIENCES INC | SOpen-market sale Common Stockindirect: By The Maetzold Descendants 2020 Trust10b5-1 | -4,782 | $31.34 | $150k | 23,625 | Aug 6, 2026 |
| Aug 4, 2026 | CSTL CASTLE BIOSCIENCES INC | SOpen-market sale Common Stockindirect: By Derek Maetzold 2020 Irrevocable Trust10b5-1 | -4,063 | $31.34 | $127k | 20,080 | Aug 6, 2026 |
50 of 409 rows shown.
Questions about Derek J Maetzold
Answered from the filings on this page, as of the latest one.
Is Derek J Maetzold buying or selling?
In the last 12 months Derek J Maetzold reported 0 open-market buys worth $0 and 33 open-market sells worth $11M on SEC Form 4; the latest was sold $516k of CSTL on Oct 5, 2026. Grants, option exercises and tax withholding are not counted.
How did Derek J Maetzold's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Derek J Maetzold has 0.
Where does Derek J Maetzold file Form 4?
Derek J Maetzold has filed Form 4 at CSTL (CASTLE BIOSCIENCES INC) as Pres. & Chief Exec. Officer. A Form 4 is required of officers, directors and holders of more than 10% of a share class within two business days of a trade.
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.