CASTLE BIOSCIENCES INC (CSTL)

Latest Insider Confidence Score

2026Q1

45.1
Bearish

Company insider confidence (by quarter)

2019Q3 2026Q1

Largest shareholders

Insider Role (last 12 mo) Shares held Filed at
Kong Garheng 10% Owner 1,433,577 May 19, 2020
Sofinnova HealthQuest Partners, L.P. 10% Owner 1,433,577 May 19, 2020
HealthQuest Venture Management, L.L.C. 10% Owner 1,433,577 May 19, 2020
Kabakoff David S Director 503,577 Jun 21, 2021
Maetzold Derek J Pres. & Chief Exec. Officer 302,936 Dec 4, 2025

Recent buy/sell transactions

Exec date Filing date Insider Role Signal Confidence Shares % of shares Under plan? Amount (USD)
Mar 3, 2026 Mar 5, 2026 Juvenal Tobin W Chief Commercial Officer Sell 40.0 -14,115 -6.59% ✗ $395.4K
Mar 3, 2026 Mar 5, 2026 Oelschlager Kristen M COO Sell 40.0 -9,219 -5.57% ✗ $258.2K
Mar 3, 2026 Mar 5, 2026 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 37.5 -36,974 -7.89% ✗ $1M
Mar 3, 2026 Mar 5, 2026 Stokes Frank CFO Sell 28.8 -21,343 -8.92% ✓ $593.9K
Feb 3, 2026 Feb 5, 2026 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 46.3 -4,017 -1.15% ✓ $158.8K
Jan 20, 2026 Jan 22, 2026 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 46.3 -4,017 -1.14% ✓ $160.7K
Jan 12, 2026 Jan 14, 2026 MAETZOLD DEREK J Pres. & Chief Exec. Officer Neutral 90.0 +62,219 21.39% ✗ -
Jan 12, 2026 Jan 14, 2026 Oelschlager Kristen M COO Neutral 85.0 +9,207 8.40% ✗ -
Jan 12, 2026 Jan 14, 2026 Juvenal Tobin W Chief Commercial Officer Neutral 90.0 +9,207 10.60% ✗ -
Jan 12, 2026 Jan 14, 2026 Stokes Frank CFO Neutral 90.0 +8,124 16.14% ✗ -
Jan 5, 2026 Jan 7, 2026 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 46.3 -4,017 -1.36% ✓ $155.7K
Dec 22, 2025 Dec 29, 2025 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 51.9 -830 -0.28% ✓ $33.5K
Dec 17, 2025 Dec 19, 2025 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 53.8 -509 -0.17% ✓ $20.4K
Dec 17, 2025 Dec 19, 2025 Oelschlager Kristen M COO Sell 20.0 -14,888 -11.96% ✗ $585.3K
Dec 15, 2025 Dec 17, 2025 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 23.8 -32,346 -9.84% ✓ $1.3M
Dec 11, 2025 Dec 15, 2025 Juvenal Tobin W Chief Commercial Officer Sell 20.0 -13,200 -13.20% ✗ $494.7K
Dec 11, 2025 Dec 15, 2025 Stokes Frank CFO Sell 22.5 -4,496 -8.20% ✗ $168.4K
Dec 9, 2025 Dec 11, 2025 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 20.0 -19,251 -4.75% ✗ $735K
Dec 9, 2025 Dec 11, 2025 Oelschlager Kristen M COO Sell 20.0 -7,243 -4.66% ✗ $276.5K
Dec 9, 2025 Dec 11, 2025 Stokes Frank CFO Sell 20.0 -9,292 -8.04% ✗ $354.8K
Dec 9, 2025 Dec 11, 2025 Juvenal Tobin W Chief Commercial Officer Sell 20.0 -8,931 -4.35% ✗ $341K
Dec 4, 2025 Dec 8, 2025 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 48.8 -1,339 -0.45% ✓ $53.6K
Dec 2, 2025 Dec 4, 2025 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 47.5 -2,678 -0.88% ✓ $105.1K
Nov 26, 2025 Dec 1, 2025 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 45.0 -4,258 -1.39% ✓ $170.7K
Nov 25, 2025 Nov 26, 2025 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 45.0 -5,115 -1.64% ✓ $204.9K
Nov 20, 2025 Nov 24, 2025 Juvenal Tobin W Chief Commercial Officer Sell 32.5 -4,693 -5.13% ✓ $167K
Nov 18, 2025 Nov 20, 2025 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 47.5 -2,678 -0.85% ✓ $91.1K
Nov 11, 2025 Nov 14, 2025 Juvenal Tobin W Chief Commercial Officer Sell 52.5 -700 -0.41% ✓ $24.8K
Nov 11, 2025 Nov 13, 2025 Stokes Frank CFO Sell 25.0 -5,388 -11.06% ✓ $189K
Nov 11, 2025 Nov 13, 2025 Juvenal Tobin W Chief Commercial Officer Sell 51.3 -700 -0.81% ✓ $24.8K
Nov 11, 2025 Nov 13, 2025 Oelschlager Kristen M COO Sell 22.5 -18,932 -14.73% ✓ $664.5K
Nov 4, 2025 Nov 6, 2025 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 38.8 -9,373 -2.89% ✓ $289.1K
Oct 31, 2025 Nov 4, 2025 Oelschlager Kristen M COO Sell 26.3 -12,678 -8.98% ✓ $317.5K
Aug 27, 2025 Nov 4, 2025 Oelschlager Kristen M COO Sell 20.0 -18,007 -10.48% ✗ $390.6K
Oct 20, 2025 Oct 23, 2025 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 52.5 -1,339 -0.41% ✓ $30K
Oct 2, 2025 Oct 6, 2025 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 52.5 -1,339 -0.41% ✓ $30.2K
Sep 17, 2025 Sep 19, 2025 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 52.5 -1,339 -0.41% ✓ $29.4K
Sep 2, 2025 Sep 4, 2025 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 52.5 -1,339 -0.41% ✓ $32K
Aug 27, 2025 Aug 29, 2025 Oelschlager Kristen M COO Sell 26.3 -12,677 -8.24% ✓ $279.1K
Aug 27, 2025 Aug 29, 2025 Oelschlager Kristen M COO Sell 20.0 -18,007 -10.48% ✗ $390.6K
Aug 15, 2025 Aug 19, 2025 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 52.5 -1,339 -0.40% ✓ $26.8K
Aug 13, 2025 Aug 15, 2025 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 22.5 -43,019 -11.50% ✓ $839K
Aug 8, 2025 Aug 12, 2025 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 20.0 -23,972 -6.02% ✗ $464.1K
Aug 8, 2025 Aug 12, 2025 Stokes Frank CFO Sell 22.5 -4,356 -8.21% ✗ $84.3K
Aug 8, 2025 Aug 12, 2025 Oelschlager Kristen M COO Sell 22.5 -2,804 -1.61% ✗ $54.3K
Aug 8, 2025 Aug 12, 2025 Juvenal Tobin W Chief Commercial Officer Sell 22.5 -4,294 -4.72% ✗ $83.1K
Jun 27, 2025 Jul 1, 2025 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 30.0 -22,576 -6.38% ✓ $458.3K
May 21, 2025 May 23, 2025 Cole G Bradley Director Neutral 52.5 - 0.00% ✗ -
May 21, 2025 May 23, 2025 BRADBURY DANIEL Director Neutral 52.5 - 0.00% ✗ -
May 21, 2025 May 23, 2025 Cotton Rodney Director Neutral 52.5 - 0.00% ✗ -
May 21, 2025 May 23, 2025 Caple Kim Director Neutral 52.5 - 0.00% ✗ -
May 21, 2025 May 23, 2025 Goldberg Ellen Director Neutral 52.5 - 0.00% ✗ -
May 21, 2025 May 23, 2025 Olson Tiffany Director Neutral 52.5 - 0.00% ✗ -
May 21, 2025 May 23, 2025 Harrison Miles Director Neutral 52.5 - 0.00% ✗ -
May 8, 2025 May 12, 2025 Cotton Rodney Director Neutral 52.5 - 0.00% ✗ -
Apr 21, 2025 Apr 23, 2025 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 45.0 -5,644 -1.57% ✓ $121.4K
Apr 8, 2025 Apr 10, 2025 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 45.0 -5,644 -1.55% ✓ $113.9K
Mar 26, 2025 Mar 28, 2025 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 45.0 -5,644 -1.52% ✓ $114.6K
Mar 26, 2025 Mar 28, 2025 Cotton Rodney Director Neutral 52.5 - 0.00% ✗ -
May 23, 2024 Mar 25, 2025 Cotton Rodney Director Neutral 52.5 - 0.00% ✗ -
May 23, 2024 Mar 12, 2025 Cotton Rodney Director Neutral 52.5 - 0.00% ✗ -
Mar 7, 2025 Mar 11, 2025 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 30.0 -29,177 -7.30% ✓ $585.7K
Mar 4, 2025 Mar 6, 2025 Oelschlager Kristen M COO Sell 22.5 -3,640 -2.17% ✗ $80.9K
Mar 4, 2025 Mar 6, 2025 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 35.0 -13,263 -3.21% ✓ $287K
Mar 4, 2025 Mar 6, 2025 Juvenal Tobin W Chief Commercial Officer Sell 22.5 -5,573 -6.48% ✗ $123.9K
Mar 4, 2025 Mar 6, 2025 Stokes Frank CFO Sell 22.5 -5,448 -11.17% ✗ $121.1K
Feb 20, 2025 Feb 24, 2025 Stokes Frank CFO Sell 20.0 -8,046 -18.55% ✓ $214.8K
Feb 5, 2025 Feb 7, 2025 BRADBURY DANIEL Director Sell 10.0 -7,867 -37.18% ✓ $221.6K
Jan 13, 2025 Jan 15, 2025 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 47.5 -2,565 -0.67% ✓ $71.9K
Jan 6, 2025 Jan 8, 2025 BRADBURY DANIEL Director Sell 10.0 -7,867 -27.10% ✓ $229.2K
Jan 6, 2025 Jan 8, 2025 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 45.0 -7,689 -1.96% ✓ $228.1K
Jan 6, 2025 Jan 8, 2025 Juvenal Tobin W Chief Commercial Officer Sell 41.3 -2,230 -3.00% ✓ $66.9K
Dec 17, 2024 Dec 19, 2024 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 38.8 -9,364 -2.33% ✓ $265.4K
Dec 13, 2024 Dec 17, 2024 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 30.0 -26,123 -6.11% ✓ $750.3K
Dec 9, 2024 Dec 11, 2024 Juvenal Tobin W Chief Commercial Officer Sell 22.5 -5,885 -2.75% ✗ $179.3K
Dec 9, 2024 Dec 11, 2024 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 20.0 -21,361 -3.22% ✗ $649.8K
Dec 9, 2024 Dec 11, 2024 Stokes Frank CFO Sell 20.0 -10,244 -7.73% ✗ $311.9K
Dec 9, 2024 Dec 11, 2024 Oelschlager Kristen M COO Sell 22.5 -6,362 -1.40% ✗ $193.9K
Dec 5, 2024 Dec 9, 2024 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 45.0 -5,127 -1.28% ✓ $160.7K
Dec 3, 2024 Dec 5, 2024 BRADBURY DANIEL Director Sell 15.0 -7,867 -21.32% ✓ $243.7K
Nov 15, 2024 Nov 19, 2024 Stokes Frank CFO Sell 20.0 -6,923 -18.34% ✓ $207.2K
Nov 12, 2024 Nov 14, 2024 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 45.0 -5,127 -1.27% ✓ $175.1K
Nov 5, 2024 Nov 7, 2024 Juvenal Tobin W Chief Commercial Officer Sell 32.5 -3,507 -5.85% ✓ $124.7K
Nov 4, 2024 Nov 6, 2024 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 45.0 -5,127 -1.25% ✓ $166.8K
Nov 1, 2024 Nov 5, 2024 Juvenal Tobin W Chief Commercial Officer Sell 32.5 -3,100 -5.21% ✓ $109.7K
Nov 1, 2024 Nov 5, 2024 BRADBURY DANIEL Director Sell 17.5 -7,867 -17.58% ✓ $273.3K
Oct 14, 2024 Oct 16, 2024 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 45.0 -5,127 -1.23% ✓ $165.5K
Oct 8, 2024 Oct 10, 2024 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 47.5 -2,562 -0.61% ✓ $77.5K
Oct 7, 2024 Oct 9, 2024 BRADBURY DANIEL Director Sell 25.0 -7,867 -14.95% ✓ $231.6K
Oct 4, 2024 Oct 8, 2024 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 47.5 -2,565 -0.61% ✓ $73.7K
Sep 16, 2024 Sep 18, 2024 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 45.0 -5,127 -1.21% ✓ $158.8K
Sep 11, 2024 Sep 13, 2024 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 47.5 -2,616 -0.61% ✓ $79.3K
Sep 9, 2024 Sep 11, 2024 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 47.5 -2,586 -0.60% ✓ $76.2K
Sep 5, 2024 Sep 9, 2024 BRADBURY DANIEL Director Sell 25.0 -7,867 -13.00% ✓ $228.3K
Sep 3, 2024 Sep 5, 2024 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 48.8 -1,914 -0.44% ✓ $57.5K
Sep 3, 2024 Sep 5, 2024 Oelschlager Kristen M COO Sell 37.5 -5,832 -4.15% ✓ $170.3K
Aug 29, 2024 Sep 3, 2024 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 45.0 -4,441 -1.02% ✓ $133.6K
Aug 23, 2024 Aug 27, 2024 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 47.5 -2,987 -0.68% ✓ $89.9K
Aug 12, 2024 Aug 14, 2024 BRADBURY DANIEL Director Sell 25.0 -7,883 -11.53% ✓ $210.1K
Aug 9, 2024 Aug 13, 2024 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sell 97.5 +45,163 11.44% ✗ $585.6K