Follow the people · Insider
Kristen M. Oelschlager
Kristen M. Oelschlager files insider transactions with the SEC as a chief operating officer of Castle Biosciences (CSTL). We hold 6 disclosed purchases and sales filed since 29 September 2021, 6 of them in the last 90 days.
- Files forCSTL
- Disclosed buys and sells6 in all, 6 in the last 90 days
- Last disclosure3 September 2026
Positions held
1 post we hold — a term names its own dates; a run of filings only says when they filed- Filed 27 September 2021 — 1 September 2026Chief Operating Officer · Castle Biosciences (CSTL)99 Form 4 lines · source: SEC Form 4
Everything they disclosed
99 entries, newest first — one per disclosure report, one per Form 4 line- exercised options over 4,152 shares of Castle BiosciencesSEC Form 43 September 2026Common Stock · traded 1 September 2026 · filed 3 September 2026
- ▼ sold on the open market 3,952 shares of Castle BiosciencesSEC Form 43 September 2026Common Stock · traded 1 September 2026 · filed 3 September 2026
- ▼ sold on the open market 200 shares of Castle BiosciencesSEC Form 43 September 2026Common Stock · traded 1 September 2026 · filed 3 September 2026
- exercised options over 4,152 shares of Castle Biosciences (a derivative holding)SEC Form 43 September 2026Stock option (right to buy) · traded 1 September 2026 · filed 3 September 2026
- ▼ sold on the open market 12,218 shares of Castle BiosciencesSEC Form 426 August 2026Common Stock · traded 24 August 2026 · filed 26 August 2026
- ▼ sold on the open market 7,161 shares of Castle BiosciencesSEC Form 426 August 2026Common Stock · traded 25 August 2026 · filed 26 August 2026
- ▼ sold on the open market 5,223 shares of Castle BiosciencesSEC Form 426 August 2026Common Stock · traded 25 August 2026 · filed 26 August 2026
- ▼ sold on the open market 3,000 shares of Castle BiosciencesSEC Form 45 August 2026Common Stock · traded 3 August 2026 · filed 5 August 2026
- ▼ sold on the open market 4,486 shares of Castle BiosciencesSEC Form 45 August 2026Common Stock · traded 3 August 2026 · filed 5 August 2026
- ▼ sold on the open market 1,100 shares of Castle BiosciencesSEC Form 45 August 2026Common Stock · traded 3 August 2026 · filed 5 August 2026
- ▼ sold on the open market 8,186 shares of Castle BiosciencesSEC Form 46 July 2026Common Stock · traded 1 July 2026 · filed 6 July 2026
- ▼ sold on the open market 400 shares of Castle BiosciencesSEC Form 46 July 2026Common Stock · traded 1 July 2026 · filed 6 July 2026
- ▼ sold on the open market 8,587 shares of Castle BiosciencesSEC Form 418 June 2026Common Stock · traded 16 June 2026 · filed 18 June 2026
- had shares withheld for tax on 2,427 shares of Castle BiosciencesSEC Form 45 March 2026Common Stock · traded 3 March 2026 · filed 5 March 2026
- exercised options over 25,771 shares of Castle BiosciencesSEC Form 45 March 2026Common Stock · traded 4 March 2026 · filed 5 March 2026
- had shares withheld for tax on 6,792 shares of Castle BiosciencesSEC Form 45 March 2026Common Stock · traded 4 March 2026 · filed 5 March 2026
- was granted 48,367 shares of Castle Biosciences (a derivative holding)SEC Form 45 March 2026Restricted Stock Units · traded 3 March 2026 · filed 5 March 2026
- exercised options over 13,811 shares of Castle Biosciences (a derivative holding)SEC Form 45 March 2026Restricted Stock Units · traded 4 March 2026 · filed 5 March 2026
- exercised options over 11,960 shares of Castle Biosciences (a derivative holding)SEC Form 45 March 2026Restricted Stock Units · traded 4 March 2026 · filed 5 March 2026
- was granted 48,367 shares of Castle Biosciences (a derivative holding)SEC Form 45 March 2026Restricted Stock Units · traded 3 March 2026 · filed 5 March 2026
- exercised options over 13,811 shares of Castle Biosciences (a derivative holding)SEC Form 45 March 2026Restricted Stock Units · traded 4 March 2026 · filed 5 March 2026
- exercised options over 11,960 shares of Castle Biosciences (a derivative holding)SEC Form 45 March 2026Restricted Stock Units · traded 4 March 2026 · filed 5 March 2026
- had shares withheld for tax on 2,427 shares of Castle BiosciencesSEC Form 45 March 2026Common Stock · traded 3 March 2026 · filed 5 March 2026
- exercised options over 25,771 shares of Castle BiosciencesSEC Form 45 March 2026Common Stock · traded 4 March 2026 · filed 5 March 2026
- had shares withheld for tax on 6,792 shares of Castle BiosciencesSEC Form 45 March 2026Common Stock · traded 4 March 2026 · filed 5 March 2026
- was granted 9,207 shares of Castle BiosciencesSEC Form 414 January 2026Common Stock · traded 12 January 2026 · filed 14 January 2026
- was granted 9,207 shares of Castle Biosciences (a derivative holding)SEC Form 414 January 2026Performance-Based Stock Unit · traded 12 January 2026 · filed 14 January 2026
- was granted 9,207 shares of Castle Biosciences (a derivative holding)SEC Form 414 January 2026Performance-Based Stock Unit · traded 12 January 2026 · filed 14 January 2026
- was granted 9,207 shares of Castle BiosciencesSEC Form 414 January 2026Common Stock · traded 12 January 2026 · filed 14 January 2026
- ▼ sold on the open market 14,888 shares of Castle BiosciencesSEC Form 419 December 2025Common Stock · traded 17 December 2025 · filed 19 December 2025
- exercised options over 15,961 shares of Castle Biosciences (a derivative holding)SEC Form 411 December 2025Restricted Stock Units · traded 9 December 2025 · filed 11 December 2025
- exercised options over 6,170 shares of Castle Biosciences (a derivative holding)SEC Form 411 December 2025Restricted Stock Units · traded 10 December 2025 · filed 11 December 2025
- exercised options over 15,961 shares of Castle BiosciencesSEC Form 411 December 2025Common Stock · traded 9 December 2025 · filed 11 December 2025
- had shares withheld for tax on 4,691 shares of Castle BiosciencesSEC Form 411 December 2025Common Stock · traded 9 December 2025 · filed 11 December 2025
- exercised options over 6,170 shares of Castle BiosciencesSEC Form 411 December 2025Common Stock · traded 10 December 2025 · filed 11 December 2025
- had shares withheld for tax on 2,552 shares of Castle BiosciencesSEC Form 411 December 2025Common Stock · traded 10 December 2025 · filed 11 December 2025
- ▼ sold on the open market 18,932 shares of Castle BiosciencesSEC Form 413 November 2025Common Stock · traded 11 November 2025 · filed 13 November 2025
- ▼ sold on the open market 18,007 shares of Castle BiosciencesSEC Form 44 November 2025Common Stock · traded 27 August 2025 · filed 4 November 2025
- ▼ sold on the open market 12,678 shares of Castle BiosciencesSEC Form 44 November 2025Common Stock · traded 31 October 2025 · filed 4 November 2025
- ▼ sold on the open market 18,007 shares of Castle BiosciencesSEC Form 429 August 2025Common Stock · traded 27 August 2025 · filed 29 August 2025
- ▼ sold on the open market 12,677 shares of Castle BiosciencesSEC Form 429 August 2025Common Stock · traded 27 August 2025 · filed 29 August 2025
- exercised options over 10,640 shares of Castle Biosciences (a derivative holding)SEC Form 412 August 2025Performance-Based Stock Unit · traded 8 August 2025 · filed 12 August 2025
- exercised options over 10,640 shares of Castle BiosciencesSEC Form 412 August 2025Common Stock · traded 8 August 2025 · filed 12 August 2025
- had shares withheld for tax on 2,804 shares of Castle BiosciencesSEC Form 412 August 2025Common Stock · traded 8 August 2025 · filed 12 August 2025
- was granted 47,838 shares of Castle Biosciences (a derivative holding)SEC Form 46 March 2025Restricted Stock Units · traded 4 March 2025 · filed 6 March 2025
- exercised options over 13,811 shares of Castle Biosciences (a derivative holding)SEC Form 46 March 2025Restricted Stock Units · traded 4 March 2025 · filed 6 March 2025
- exercised options over 13,811 shares of Castle BiosciencesSEC Form 46 March 2025Common Stock · traded 4 March 2025 · filed 6 March 2025
- had shares withheld for tax on 3,640 shares of Castle BiosciencesSEC Form 46 March 2025Common Stock · traded 4 March 2025 · filed 6 March 2025
- exercised options over 15,961 shares of Castle Biosciences (a derivative holding)SEC Form 411 December 2024Restricted Stock Units · traded 9 December 2024 · filed 11 December 2024
- exercised options over 1,750 shares of Castle Biosciences (a derivative holding)SEC Form 411 December 2024Restricted Stock Units · traded 10 December 2024 · filed 11 December 2024
- exercised options over 6,169 shares of Castle Biosciences (a derivative holding)SEC Form 411 December 2024Restricted Stock Units · traded 10 December 2024 · filed 11 December 2024
- exercised options over 15,961 shares of Castle BiosciencesSEC Form 411 December 2024Common Stock · traded 9 December 2024 · filed 11 December 2024
- had shares withheld for tax on 4,206 shares of Castle BiosciencesSEC Form 411 December 2024Common Stock · traded 9 December 2024 · filed 11 December 2024
- exercised options over 1,750 shares of Castle BiosciencesSEC Form 411 December 2024Common Stock · traded 10 December 2024 · filed 11 December 2024
- had shares withheld for tax on 530 shares of Castle BiosciencesSEC Form 411 December 2024Common Stock · traded 10 December 2024 · filed 11 December 2024
- exercised options over 6,169 shares of Castle BiosciencesSEC Form 411 December 2024Common Stock · traded 10 December 2024 · filed 11 December 2024
- had shares withheld for tax on 1,626 shares of Castle BiosciencesSEC Form 411 December 2024Common Stock · traded 10 December 2024 · filed 11 December 2024
- ▼ sold on the open market 4,582 shares of Castle BiosciencesSEC Form 45 September 2024Common Stock · traded 3 September 2024 · filed 5 September 2024
- ▼ sold on the open market 1,250 shares of Castle BiosciencesSEC Form 45 September 2024Common Stock · traded 3 September 2024 · filed 5 September 2024
- was granted 10,640 shares of Castle Biosciences (a derivative holding)SEC Form 413 August 2024Performance-Based Stock Unit · traded 9 August 2024 · filed 13 August 2024
- was granted 10,641 shares of Castle BiosciencesSEC Form 413 August 2024Common Stock · traded 9 August 2024 · filed 13 August 2024
- had shares withheld for tax on 2,804 shares of Castle BiosciencesSEC Form 413 August 2024Common Stock · traded 9 August 2024 · filed 13 August 2024
- ▼ sold on the open market 8,764 shares of Castle BiosciencesSEC Form 45 August 2024Common Stock · traded 1 August 2024 · filed 5 August 2024
- ▼ sold on the open market 4,225 shares of Castle BiosciencesSEC Form 45 August 2024Common Stock · traded 1 August 2024 · filed 5 August 2024
- ▼ sold on the open market 2,793 shares of Castle BiosciencesSEC Form 431 July 2024Common Stock · traded 29 July 2024 · filed 31 July 2024
- ▼ sold on the open market 2,793 shares of Castle BiosciencesSEC Form 43 July 2024Common Stock · traded 1 July 2024 · filed 3 July 2024
- was granted 55,243 shares of Castle Biosciences (a derivative holding)SEC Form 46 March 2024Restricted Stock Units · traded 4 March 2024 · filed 6 March 2024
- exercised options over 1,197 shares of Castle Biosciences (a derivative holding)SEC Form 43 January 2024Stock option (right to buy) · traded 29 December 2023 · filed 3 January 2024
- exercised options over 3,418 shares of Castle Biosciences (a derivative holding)SEC Form 43 January 2024Stock option (right to buy) · traded 29 December 2023 · filed 3 January 2024
- exercised options over 8,000 shares of Castle Biosciences (a derivative holding)SEC Form 43 January 2024Stock option (right to buy) · traded 29 December 2023 · filed 3 January 2024
- exercised options over 1,197 shares of Castle BiosciencesSEC Form 43 January 2024Common Stock · traded 29 December 2023 · filed 3 January 2024
- exercised options over 3,418 shares of Castle BiosciencesSEC Form 43 January 2024Common Stock · traded 29 December 2023 · filed 3 January 2024
- exercised options over 8,000 shares of Castle BiosciencesSEC Form 43 January 2024Common Stock · traded 29 December 2023 · filed 3 January 2024
- exercised options over 15,961 shares of Castle Biosciences (a derivative holding)SEC Form 412 December 2023Restricted Stock Units · traded 9 December 2023 · filed 12 December 2023
- exercised options over 6,170 shares of Castle Biosciences (a derivative holding)SEC Form 412 December 2023Restricted Stock Units · traded 10 December 2023 · filed 12 December 2023
- exercised options over 1,750 shares of Castle Biosciences (a derivative holding)SEC Form 412 December 2023Restricted Stock Units · traded 10 December 2023 · filed 12 December 2023
- exercised options over 15,961 shares of Castle BiosciencesSEC Form 412 December 2023Common Stock · traded 9 December 2023 · filed 12 December 2023
- had shares withheld for tax on 4,206 shares of Castle BiosciencesSEC Form 412 December 2023Common Stock · traded 9 December 2023 · filed 12 December 2023
- exercised options over 6,170 shares of Castle BiosciencesSEC Form 412 December 2023Common Stock · traded 10 December 2023 · filed 12 December 2023
- had shares withheld for tax on 1,626 shares of Castle BiosciencesSEC Form 412 December 2023Common Stock · traded 10 December 2023 · filed 12 December 2023
- exercised options over 1,750 shares of Castle BiosciencesSEC Form 412 December 2023Common Stock · traded 10 December 2023 · filed 12 December 2023
- had shares withheld for tax on 462 shares of Castle BiosciencesSEC Form 412 December 2023Common Stock · traded 10 December 2023 · filed 12 December 2023
- exercised options over 7,178 shares of Castle Biosciences (a derivative holding)SEC Form 430 December 2022Stock option (right to buy) · traded 28 December 2022 · filed 30 December 2022
- exercised options over 7,178 shares of Castle BiosciencesSEC Form 430 December 2022Common Stock · traded 28 December 2022 · filed 30 December 2022
- was granted 63,844 shares of Castle Biosciences (a derivative holding)SEC Form 413 December 2022Restricted Stock Units · traded 9 December 2022 · filed 13 December 2022
- exercised options over 1,750 shares of Castle Biosciences (a derivative holding)SEC Form 413 December 2022Restricted Stock Units · traded 10 December 2022 · filed 13 December 2022
- exercised options over 6,170 shares of Castle Biosciences (a derivative holding)SEC Form 413 December 2022Restricted Stock Units · traded 10 December 2022 · filed 13 December 2022
- exercised options over 1,750 shares of Castle BiosciencesSEC Form 413 December 2022Common Stock · traded 10 December 2022 · filed 13 December 2022
- had shares withheld for tax on 516 shares of Castle BiosciencesSEC Form 413 December 2022Common Stock · traded 10 December 2022 · filed 13 December 2022
- exercised options over 6,170 shares of Castle BiosciencesSEC Form 413 December 2022Common Stock · traded 10 December 2022 · filed 13 December 2022
- had shares withheld for tax on 1,818 shares of Castle BiosciencesSEC Form 413 December 2022Common Stock · traded 10 December 2022 · filed 13 December 2022
- was granted 6,692 shares of Castle BiosciencesSEC Form 428 April 2022Common Stock · traded 26 April 2022 · filed 28 April 2022
- was granted 42,550 shares of Castle Biosciences (a derivative holding)SEC Form 414 December 2021Stock option (right to buy) · traded 10 December 2021 · filed 14 December 2021
- was granted 24,679 shares of Castle Biosciences (a derivative holding)SEC Form 414 December 2021Restricted Stock Units · traded 10 December 2021 · filed 14 December 2021
- exercised options over 1,750 shares of Castle Biosciences (a derivative holding)SEC Form 414 December 2021Restricted Stock Units · traded 10 December 2021 · filed 14 December 2021
- exercised options over 1,750 shares of Castle BiosciencesSEC Form 414 December 2021Common Stock · traded 10 December 2021 · filed 14 December 2021
- had shares withheld for tax on 516 shares of Castle BiosciencesSEC Form 414 December 2021Common Stock · traded 10 December 2021 · filed 14 December 2021
- ▼ sold on the open market 8,574 shares of Castle BiosciencesSEC Form 429 September 2021Common Stock · traded 27 September 2021 · filed 29 September 2021
- ▼ sold on the open market 1,426 shares of Castle BiosciencesSEC Form 429 September 2021Common Stock · traded 27 September 2021 · filed 29 September 2021
Positions come from the unitedstates/congress-legislators roster, the Office of Government Ethics and the SEC’s Form 4 index. Every disclosed line names its own source and links the document the government published; we print what the filing says and never a price we did not read from it. Headlines and links come from the GDELT Global Knowledge Graph — the story stays with the publisher. The portrait, where we have one, is the public-domain Congressional Bioguide photograph.