Separate the three disclosure sources
Recent Form 4 activity
Castle Biosciences, Inc. Common Stock: source evidence dated 2026-10-10T12:08:28.848Z.
- Available
- 2026-10-07
- Trade date
- 2026-10-05
- Reporting owners
- MAETZOLD DEREK J
- Code
- S
- Shares
- 2,718
- Reported value
- Not reported
The displayed owner or issuer and source fields identify the receipt to verify; keep reporting and availability dates separate.
Is this an insider transaction, 13F holding, or Congressional event?
Each source has different dates and units. Raw ticker-matched receipts, including amendments, are not deduplicated current ownership totals.
SEC 0001628280-26-065327Follow the source receipt or manager/member profile. Avoid combining transaction value and 13F position value into an ownership percentage.
Read CSTL fundamentals
Follow the source receipt or manager/member profile. Avoid combining transaction value and 13F position value into an ownership percentage.
Read CSTL fundamentalsKeep reporting dates and units beside the answer, and inspect its original citations.
Recent Form 4 activity
See the complete recent form 4 activity
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| 2026-10-07 | 2026-10-05 | MAETZOLD DEREK J | S | 2,718 | Not reported |
| 2026-10-07 | 2026-10-05 | MAETZOLD DEREK J | S | 3,198 | Not reported |
| 2026-10-07 | 2026-10-05 | MAETZOLD DEREK J | S | 8,580 | Not reported |
| 2026-10-05 | 2026-10-01 | Oelschlager Kristen M | S | 1,346 | Not reported |
| 2026-10-05 | 2026-10-01 | Oelschlager Kristen M | S | 2,807 | Not reported |
| 2026-10-01 | 2026-09-30 | Juvenal Tobin W | S | 1,034 | Not reported |
| 2026-10-01 | 2026-09-29 | Juvenal Tobin W | S | 5,543 | Not reported |
| 2026-09-23 | 2026-09-21 | MAETZOLD DEREK J | S | 2,718 | Not reported |
| 2026-09-23 | 2026-09-21 | MAETZOLD DEREK J | S | 3,198 | Not reported |
| 2026-09-23 | 2026-09-21 | MAETZOLD DEREK J | S | 8,580 | Not reported |
| 2026-09-16 | 2026-09-15 | Juvenal Tobin W | S | 3,294 | Not reported |
| 2026-09-16 | 2026-09-14 | Juvenal Tobin W | S | 3,306 | Not reported |
| 2026-09-15 | 2026-09-11 | MAETZOLD DEREK J | S | 71 | Not reported |
| 2026-09-15 | 2026-09-11 | MAETZOLD DEREK J | S | 83 | Not reported |
| 2026-09-15 | 2026-09-11 | MAETZOLD DEREK J | S | 223 | Not reported |
| 2026-09-15 | 2026-09-11 | MAETZOLD DEREK J | S | 2,656 | Not reported |
| 2026-09-15 | 2026-09-11 | MAETZOLD DEREK J | S | 3,124 | Not reported |
| 2026-09-15 | 2026-09-11 | MAETZOLD DEREK J | S | 8,361 | Not reported |
| 2026-09-04 | 2026-09-01 | Oelschlager Kristen M | S | 200 | Not reported |
| 2026-09-04 | 2026-09-01 | Oelschlager Kristen M | S | 3,952 | Not reported |
| 2026-09-03 | 2026-08-31 | Juvenal Tobin W | S | 1,730 | Not reported |
| 2026-09-02 | 2026-08-28 | MAETZOLD DEREK J | S | 21 | Not reported |
| 2026-09-02 | 2026-08-28 | MAETZOLD DEREK J | S | 21 | Not reported |
| 2026-09-02 | 2026-08-28 | MAETZOLD DEREK J | S | 21 | Not reported |
| 2026-09-02 | 2026-08-28 | MAETZOLD DEREK J | S | 21 | Not reported |
| 2026-09-02 | 2026-08-28 | MAETZOLD DEREK J | S | 177 | Not reported |
| 2026-09-02 | 2026-08-28 | MAETZOLD DEREK J | S | 209 | Not reported |
| 2026-09-02 | 2026-08-28 | MAETZOLD DEREK J | S | 956 | Not reported |
| 2026-09-02 | 2026-08-28 | MAETZOLD DEREK J | S | 257 | Not reported |
| 2026-09-02 | 2026-08-28 | MAETZOLD DEREK J | S | 257 | Not reported |
| 2026-09-02 | 2026-08-28 | MAETZOLD DEREK J | S | 257 | Not reported |
| 2026-09-02 | 2026-08-28 | MAETZOLD DEREK J | S | 257 | Not reported |
| 2026-09-02 | 2026-08-28 | MAETZOLD DEREK J | S | 2,129 | Not reported |
| 2026-09-02 | 2026-08-28 | MAETZOLD DEREK J | S | 2,505 | Not reported |
| 2026-09-02 | 2026-08-28 | MAETZOLD DEREK J | S | 11,472 | Not reported |
| 2026-08-28 | 2026-08-25 | Juvenal Tobin W | S | 9,050 | Not reported |
| 2026-08-27 | 2026-08-25 | Oelschlager Kristen M | S | 5,223 | Not reported |
| 2026-08-27 | 2026-08-25 | Oelschlager Kristen M | S | 7,161 | Not reported |
| 2026-08-27 | 2026-08-24 | Oelschlager Kristen M | S | 12,218 | Not reported |
| 2026-08-20 | 2026-08-17 | Juvenal Tobin W | S | 1,730 | Not reported |
| 2026-08-19 | 2026-08-14 | Stokes Frank | S | 24,908 | Not reported |
| 2026-08-19 | 2026-08-14 | MAETZOLD DEREK J | S | 278 | Not reported |
| 2026-08-19 | 2026-08-14 | MAETZOLD DEREK J | S | 278 | Not reported |
| 2026-08-19 | 2026-08-14 | MAETZOLD DEREK J | S | 278 | Not reported |
| 2026-08-19 | 2026-08-14 | MAETZOLD DEREK J | S | 278 | Not reported |
| 2026-08-19 | 2026-08-14 | MAETZOLD DEREK J | S | 2,306 | Not reported |
| 2026-08-19 | 2026-08-14 | MAETZOLD DEREK J | S | 2,714 | Not reported |
| 2026-08-19 | 2026-08-14 | MAETZOLD DEREK J | S | 1,100 | Not reported |
| 2026-08-07 | 2025-11-24 | Juvenal Tobin W | S | 1,301 | Not reported |
| 2026-08-07 | 2026-08-05 | MAETZOLD DEREK J | S | 473 | Not reported |
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90-day public availability window, up to 50 records.
Recent institutional filing receipts
These are raw ticker-matched positions in recent 13F receipts, including amendments. They are not deduplicated current ownership totals. Open the manager profile to inspect its effective filing book.
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| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | 2026-06-30 | 2026-08-25 | 37,802 | $901,578 | None |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | 2026-06-30 | 2026-08-25 | 901,578 | $37,802,000 | None |
| Empowered Funds, LLC | 2026-06-30 | 2026-08-18 | 142,338 | $3,394,761 | None |
| Jefferies Financial Group Inc. | 2026-06-30 | 2026-08-18 | 647,391 | $15,440,275 | None |
| Investors Portfolio Services LLC | 2026-06-30 | 2026-08-15 | 18 | $429 | None |
| SummitTX Capital, L.P. | 2026-06-30 | 2026-08-15 | 79,018 | $1,884,579 | None |
| SEI INVESTMENTS CO | 2026-06-30 | 2026-08-15 | 74,267 | $1,771,268 | None |
| SEI INVESTMENTS CO | 2026-06-30 | 2026-08-15 | 166 | $3,970 | None |
| XTX Topco Ltd | 2026-06-30 | 2026-08-15 | 39,923 | $952,164 | None |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 2026-06-30 | 2026-08-15 | 254,535 | $6,070,660 | None |
| Sixth Street Partners Management Company, L.P. | 2026-06-30 | 2026-08-15 | 254,535 | $6,070,660 | None |
| Qube Research & Technologies Ltd | 2026-06-30 | 2026-08-15 | 589,300 | $14,054,805 | None |
| OSAIC HOLDINGS, INC. | 2026-06-30 | 2026-08-15 | 800 | $19,080 | None |
| OSAIC HOLDINGS, INC. | 2026-06-30 | 2026-08-15 | 391 | $9,325 | None |
| Schonfeld Strategic Advisors LLC | 2026-06-30 | 2026-08-15 | 19,930 | $475,330 | None |
| Man Group plc | 2026-06-30 | 2026-08-15 | 108,761 | $2,593,950 | None |
| Trexquant Investment LP | 2026-06-30 | 2026-08-15 | 206,111 | $4,915,747 | None |
| MetLife Investment Management, LLC | 2026-06-30 | 2026-08-15 | 17,008 | $405,641 | None |
| Engineers Gate Manager LP | 2026-06-30 | 2026-08-15 | 29,480 | $703,098 | None |
| Birchview Capital, LP | 2026-06-30 | 2026-08-15 | 12,984 | $309,668 | None |
| JANE STREET GROUP, LLC | 2026-06-30 | 2026-08-15 | 5,098 | $121,587 | None |
| JANE STREET GROUP, LLC | 2026-06-30 | 2026-08-15 | 39,695 | $946,726 | None |
| Orion Porfolio Solutions, LLC | 2026-06-30 | 2026-08-15 | 69,654 | $1,661,248 | None |
| Legal & General Group Plc | 2026-06-30 | 2026-08-15 | 13,135 | $313,271 | None |
| Legal & General Group Plc | 2026-06-30 | 2026-08-15 | 4,508 | $107,516 | None |
| Legal & General Group Plc | 2026-06-30 | 2026-08-15 | 2,905 | $69,284 | None |
| RTW INVESTMENTS, LP | 2026-06-30 | 2026-08-15 | 2,778,335 | $66,263,290 | None |
| HRT FINANCIAL LP | 2026-06-30 | 2026-08-15 | 115,853 | $2,763,000 | None |
| Parkman Healthcare Partners LLC | 2026-06-30 | 2026-08-15 | 144,791 | $3,453,265 | None |
| MILLENNIUM MANAGEMENT LLC | 2026-06-30 | 2026-08-15 | 205,369 | $4,898,051 | None |
| Numerai GP LLC | 2026-06-30 | 2026-08-15 | 10,348 | $246,800 | None |
| Allianz Asset Management GmbH | 2026-06-30 | 2026-08-15 | 16,034 | $393,635 | None |
| Allianz Asset Management GmbH | 2026-06-30 | 2026-08-15 | 753 | $18,486 | None |
| Allianz Asset Management GmbH | 2026-06-30 | 2026-08-15 | 794,395 | $19,502,397 | None |
| Allianz Asset Management GmbH | 2026-06-30 | 2026-08-15 | 142 | $3,486 | None |
| SILVERCREST ASSET MANAGEMENT GROUP LLC | 2026-06-30 | 2026-08-15 | 256,095 | $6,107,866 | None |
| JONES FINANCIAL COMPANIES LLLP | 2026-06-30 | 2026-08-15 | 343 | $8,335 | None |
| Freestone Grove Partners LP | 2026-06-30 | 2026-08-15 | 1 | $24 | None |
| SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC | 2026-06-30 | 2026-08-15 | 824,872 | $19,673,197 | None |
| AQR CAPITAL MANAGEMENT LLC | 2026-06-30 | 2026-08-15 | 391 | $9,325 | None |
| AQR CAPITAL MANAGEMENT LLC | 2026-06-30 | 2026-08-15 | 524 | $12,497 | None |
| AQR CAPITAL MANAGEMENT LLC | 2026-06-30 | 2026-08-15 | 6 | $143 | None |
| AQR CAPITAL MANAGEMENT LLC | 2026-06-30 | 2026-08-15 | 165,590 | $3,949,322 | None |
| AQR CAPITAL MANAGEMENT LLC | 2026-06-30 | 2026-08-15 | 56 | $1,336 | None |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE | 2026-06-30 | 2026-08-15 | 12,543 | $299,151 | None |
| ROYAL BANK OF CANADA | 2026-06-30 | 2026-08-15 | 78 | $2,000 | None |
| ROYAL BANK OF CANADA | 2026-06-30 | 2026-08-15 | 897 | $21,000 | None |
| ALLIANCEBERNSTEIN L.P. | 2026-06-30 | 2026-08-15 | 27,100 | $665,305 | None |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | 2026-06-30 | 2026-08-15 | 221,338 | $5,278,911 | None |
| D. E. Shaw & Co., Inc. | 2026-06-30 | 2026-08-15 | 112,789 | $2,690,018 | None |
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90-day public filing window, up to 50 source positions.
Recent Congressional disclosures
No matching Congressional transactions were returned in this source preview.
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No records are available for this view.
Bounded public source preview, up to 25 disclosed events.
How to read the disclosure dates
The tables report different things: insider transactions, institutional positions and Congressional transaction ranges. Read each table with its source dates and units. They cannot be added into a combined ownership percentage.
Company insiders
SEC Form 4 purchases, sales and awards report transactions and their public filing availability.
Institutional managers
13F reports disclose delayed quarter-end positions. They are not a record of trades between quarters.
Congressional filers
Periodic transaction reports disclose transaction dates and amount brackets. Public filing dates determine what researchers could know.
Read the transaction codes
Awards use transaction code A, purchases P and sales S. An acquisition from an award is not the same as an open-market purchase. Joint filers may share a transaction. Use original receipts and availability dates to interpret the events.