Insider · CIK 0001856565
Kristen M Oelschlager
Files at CSTL (CASTLE BIOSCIENCES INC). First filing Aug 29, 2025, latest Oct 5, 2026.
In brief
Kristen M Oelschlager files SEC Form 4 as COO at CSTL (CASTLE BIOSCIENCES INC). Since Aug 29, 2025, Kristen M Oelschlager has reported 0 open-market buys worth $0 and 12 open-market sells worth $4.4M, the latest filed on Oct 5, 2026.
A track record needs three past buys with six months of prices behind them; Kristen M Oelschlager has 0, so none is measured yet.
The newest scored trade: sold $149k of CSTL on Oct 1, 2026, filed Oct 5, 2026, scored 16 (weak), under a 10b5-1 plan. In the last 12 months: 0 buys worth $0 and 10 sells worth $3.7M.
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
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.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 16Weak | CASTLE BIOSCIENCES INC | $149k 4,153 shares | -24% | +94% from low-18% from high | |
| 16Weak | CASTLE BIOSCIENCES INC | $139k 4,152 shares | -24% | +84% from low-22% from high | |
| 68Notable | CASTLE BIOSCIENCES INC | $838k 24,602 shares | -25% | +84% from low-22% from high | |
| 38Weak | CASTLE BIOSCIENCES INC | $256k 8,586 shares | -39% | +98% from low-29% from high | |
| 30Weak | CASTLE BIOSCIENCES INC | $210k 8,586 shares | -28% | +69% from low-43% from high | |
| 25Weak | CASTLE BIOSCIENCES INC | $178k 8,587 shares | -22% | +40% from low-52% from high | |
| 74Notable | CASTLE BIOSCIENCES INC | $585k 14,888 shares | -55% | +171% from low-1% from high | |
| 55Moderate | CASTLE BIOSCIENCES INC | $665k 18,932 shares | -61% | +139% from low0% from high | |
| 39Weak | CASTLE BIOSCIENCES INC | $317k 12,678 shares | -32% | +74% from low-26% from high | |
| 49Moderate | CASTLE BIOSCIENCES INC | $391k 18,007 shares | -15% | +52% from low-36% from high | |
| 49Moderate | CASTLE BIOSCIENCES INC | $391k 18,007 shares | -10% | +52% from low-36% from high | |
| 22Weak | CASTLE BIOSCIENCES INC | $279k 12,677 shares | -8% | +52% from low-36% from high |
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 1, 2026 | CSTL CASTLE BIOSCIENCES INC | 4,153 0.01% of outstanding | $148k | Oct 1, 2026 | $1.2M |
| Aug 24, 2026 | CSTL Castle Biosciences, Inc. | 24,602 0.08% of outstanding | $841k | Aug 24, 2026 | none |
| Jun 16, 2026 | CSTL CASTLE BIOSCIENCES INC | 29,911 0.10% of outstanding | $618k | Jun 16, 2026 | none |
| Dec 17, 2025 | CSTL Castle Biosciences, Inc. | 14,888 0.05% of outstanding | $581k | Dec 17, 2025 | $982k |
| Nov 12, 2025 | CSTL Castle Biosciences, Inc. | 18,932 0.06% of outstanding | $658k | Nov 11, 2025 | $987k |
| Aug 27, 2025 | CSTL Castle Biosciences, Inc. | 25,355 0.09% of outstanding | $541k | Aug 27, 2025 | none |
| Aug 27, 2025 | CSTL Castle Biosciences, Inc. | 18,007 0.06% of outstanding | $384k | Aug 27, 2025 | none |
Transactions
The newest 50 of 53 rows this insider has filed.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Oct 1, 2026 | CSTL CASTLE BIOSCIENCES INC | MOption exercise Common Stock10b5-1 | +4,153 | $3.38 | $14k | 17,509 | 8 d ago |
| Oct 1, 2026 | CSTL CASTLE BIOSCIENCES INC | SOpen-market sale Common Stock10b5-1 | -2,807 | $35.75 | $100k | 14,702 | 8 d ago |
| Oct 1, 2026 | CSTL CASTLE BIOSCIENCES INC | SOpen-market sale Common Stock10b5-1 | -1,346 | $36.38 | $49k | 13,356 | 8 d ago |
| Oct 1, 2026 | CSTL CASTLE BIOSCIENCES INC | MOption exercise Stock option (right to buy)derivative10b5-1 | -4,153 | $0.00 | $0 | 8,305 | 8 d ago |
| Sep 1, 2026 | CSTL CASTLE BIOSCIENCES INC | MOption exercise Common Stock10b5-1 | +4,152 | $3.38 | $14k | 17,508 | 40 d ago |
| Sep 1, 2026 | CSTL CASTLE BIOSCIENCES INC | SOpen-market sale Common Stock10b5-1 | -3,952 | $33.36 | $132k | 13,556 | 40 d ago |
| Sep 1, 2026 | CSTL CASTLE BIOSCIENCES INC | SOpen-market sale Common Stock10b5-1 | -200 | $34.02 | $6,804 | 13,356 | 40 d ago |
| Sep 1, 2026 | CSTL CASTLE BIOSCIENCES INC | MOption exercise Stock option (right to buy)derivative10b5-1 | -4,152 | $0.00 | $0 | 12,458 | 40 d ago |
| Aug 24, 2026 | CSTL CASTLE BIOSCIENCES INC | SOpen-market sale Common Stockindirect: The Fritz Shorter Trust | -12,218 | $33.69 | $412k | 85,033 | Aug 26, 2026 |
| Aug 25, 2026 | CSTL CASTLE BIOSCIENCES INC | SOpen-market sale Common Stockindirect: The Fritz Shorter Trust | -7,161 | $34.26 | $245k | 77,872 | Aug 26, 2026 |
| Aug 25, 2026 | CSTL CASTLE BIOSCIENCES INC | SOpen-market sale Common Stockindirect: The Fritz Shorter Trust | -5,223 | $34.64 | $181k | 72,649 | Aug 26, 2026 |
| Aug 3, 2026 | CSTL CASTLE BIOSCIENCES INC | SOpen-market sale Common Stock10b5-1 | -3,000 | $29.12 | $87k | 18,874 | Aug 5, 2026 |
| Aug 3, 2026 | CSTL CASTLE BIOSCIENCES INC | SOpen-market sale Common Stock10b5-1 | -4,486 | $30.00 | $135k | 14,388 | Aug 5, 2026 |
| Aug 3, 2026 | CSTL CASTLE BIOSCIENCES INC | SOpen-market sale Common Stock10b5-1 | -1,100 | $30.62 | $34k | 13,288 | Aug 5, 2026 |
| Jul 1, 2026 | CSTL CASTLE BIOSCIENCES INC | SOpen-market sale Common Stock10b5-1 | -8,186 | $24.40 | $200k | 22,274 | Jul 6, 2026 |
| Jul 1, 2026 | CSTL CASTLE BIOSCIENCES INC | SOpen-market sale Common Stock10b5-1 | -400 | $24.78 | $9,912 | 21,874 | Jul 6, 2026 |
| Jun 16, 2026 | CSTL CASTLE BIOSCIENCES INC | SOpen-market sale Common Stock10b5-1 | -8,587 | $20.71 | $178k | 30,460 | Jun 18, 2026 |
| Mar 3, 2026 | CSTL CASTLE BIOSCIENCES INC | FTax withholding Common Stock | -2,427 | $27.57 | $67k | 20,068 | Mar 5, 2026 |
| Mar 4, 2026 | CSTL CASTLE BIOSCIENCES INC | MOption exercise Common Stock | +25,771 | - | - | 45,839 | Mar 5, 2026 |
| Mar 4, 2026 | CSTL CASTLE BIOSCIENCES INC | FTax withholding Common Stock | -6,792 | $28.17 | $191k | 39,047 | Mar 5, 2026 |
| Mar 3, 2026 | CSTL CASTLE BIOSCIENCES INC | AGrant or award Restricted Stock Unitsderivative | +48,367 | $0.00 | $0 | 48,367 | Mar 5, 2026 |
| Mar 4, 2026 | CSTL CASTLE BIOSCIENCES INC | MOption exercise Restricted Stock Unitsderivative | -13,811 | $0.00 | $0 | 27,621 | Mar 5, 2026 |
| Mar 4, 2026 | CSTL CASTLE BIOSCIENCES INC | MOption exercise Restricted Stock Unitsderivative | -11,960 | $0.00 | $0 | 35,878 | Mar 5, 2026 |
| Jan 12, 2026 | CSTL CASTLE BIOSCIENCES INC | AGrant or award Common Stock | +9,207 | $0.00 | $0 | 21,530 | Jan 14, 2026 |
| Jan 12, 2026 | CSTL CASTLE BIOSCIENCES INC | AGrant or award Performance-Based Stock Unitderivative | +9,207 | $0.00 | $0 | 9,207 | Jan 14, 2026 |
| Dec 17, 2025 | CSTL CASTLE BIOSCIENCES INC | SOpen-market sale Common Stock | -14,888 | $39.31 | $585k | 12,323 | Dec 19, 2025 |
| Dec 9, 2025 | CSTL CASTLE BIOSCIENCES INC | MOption exercise Common Stock | +15,961 | - | - | 28,284 | Dec 11, 2025 |
| Dec 9, 2025 | CSTL CASTLE BIOSCIENCES INC | FTax withholding Common Stock | -4,691 | $38.25 | $179k | 23,593 | Dec 11, 2025 |
| Dec 10, 2025 | CSTL CASTLE BIOSCIENCES INC | MOption exercise Common Stock | +6,170 | - | - | 29,763 | Dec 11, 2025 |
| Dec 10, 2025 | CSTL CASTLE BIOSCIENCES INC | FTax withholding Common Stock | -2,552 | $38.02 | $97k | 27,211 | Dec 11, 2025 |
| Dec 9, 2025 | CSTL CASTLE BIOSCIENCES INC | MOption exercise Restricted Stock Unitsderivative | -15,961 | $0.00 | $0 | 15,961 | Dec 11, 2025 |
| Dec 10, 2025 | CSTL CASTLE BIOSCIENCES INC | MOption exercise Restricted Stock Unitsderivative | -6,170 | $0.00 | $0 | 0 | Dec 11, 2025 |
| Nov 11, 2025 | CSTL CASTLE BIOSCIENCES INC | SOpen-market sale Common Stock10b5-1 | -18,932 | $35.10 | $665k | 12,323 | Nov 13, 2025 |
| Oct 31, 2025 | CSTL CASTLE BIOSCIENCES INC | SOpen-market sale Common Stock10b5-1 | -12,678 | $25.04 | $317k | 27,569 | Nov 4, 2025 |
| Aug 27, 2025 | CSTL CASTLE BIOSCIENCES INC | SOpen-market sale Common Stockindirect: The Fritz Shorter Trust | -18,007 | $21.69 | $391k | 100,937 | Nov 4, 2025 |
| Aug 27, 2025 | CSTL CASTLE BIOSCIENCES INC | SOpen-market sale Common Stock | -18,007 | $21.69 | $391k | 153,793 | Aug 29, 2025 |
| Aug 27, 2025 | CSTL CASTLE BIOSCIENCES INC | SOpen-market sale Common Stock10b5-1 | -12,677 | $22.02 | $279k | 141,116 | Aug 29, 2025 |
| Aug 8, 2025 | CSTL CASTLE BIOSCIENCES INC | MOption exercise Common Stock | +10,640 | $0.00 | $0 | 174,604 | Aug 12, 2025 |
| Aug 8, 2025 | CSTL CASTLE BIOSCIENCES INC | FTax withholding Common Stock | -2,804 | $19.36 | $54k | 171,800 | Aug 12, 2025 |
| Aug 8, 2025 | CSTL CASTLE BIOSCIENCES INC | MOption exercise Performance-Based Stock Unitderivative | -10,640 | $0.00 | $0 | 0 | Aug 12, 2025 |
| Mar 4, 2025 | CSTL CASTLE BIOSCIENCES INC | MOption exercise Common Stock | +13,811 | - | - | 167,604 | Mar 6, 2025 |
| Mar 4, 2025 | CSTL CASTLE BIOSCIENCES INC | FTax withholding Common Stock | -3,640 | $22.23 | $81k | 163,964 | Mar 6, 2025 |
| Mar 4, 2025 | CSTL CASTLE BIOSCIENCES INC | AGrant or award Restricted Stock Unitsderivative | +47,838 | $0.00 | $0 | 47,838 | Mar 6, 2025 |
| Mar 4, 2025 | CSTL CASTLE BIOSCIENCES INC | MOption exercise Restricted Stock Unitsderivative | -13,811 | $0.00 | $0 | 41,432 | Mar 6, 2025 |
| Dec 9, 2024 | CSTL CASTLE BIOSCIENCES INC | MOption exercise Common Stock | +15,961 | - | - | 150,965 | Dec 11, 2024 |
| Dec 9, 2024 | CSTL CASTLE BIOSCIENCES INC | FTax withholding Common Stock | -4,206 | $30.91 | $130k | 146,759 | Dec 11, 2024 |
| Dec 10, 2024 | CSTL CASTLE BIOSCIENCES INC | MOption exercise Common Stock | +1,750 | - | - | 148,509 | Dec 11, 2024 |
| Dec 10, 2024 | CSTL CASTLE BIOSCIENCES INC | FTax withholding Common Stock | -530 | $29.63 | $16k | 147,979 | Dec 11, 2024 |
| Dec 10, 2024 | CSTL CASTLE BIOSCIENCES INC | MOption exercise Common Stock | +6,169 | - | - | 154,148 | Dec 11, 2024 |
| Dec 10, 2024 | CSTL CASTLE BIOSCIENCES INC | FTax withholding Common Stock | -1,626 | $29.63 | $48k | 152,522 | Dec 11, 2024 |
Questions about Kristen M Oelschlager
Answered from the filings on this page, as of the latest one.
Is Kristen M Oelschlager buying or selling?
In the last 12 months Kristen M Oelschlager reported 0 open-market buys worth $0 and 10 open-market sells worth $3.7M on SEC Form 4; the latest was sold $149k of CSTL on Oct 1, 2026. Grants, option exercises and tax withholding are not counted.
How did Kristen M Oelschlager's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Kristen M Oelschlager has 0.
Where does Kristen M Oelschlager file Form 4?
Kristen M Oelschlager has filed Form 4 at CSTL (CASTLE BIOSCIENCES INC) as Chief Operating 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.