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CASTLE BIOSCIENCES INC (CSTL) Stock Ownership and Short Interest

USA - Nasdaq - NASDAQ:CSTL - US14843C1053 - Common Stock

38.63 USD
+0.66 (+1.74%)
Last: 12/12/2025, 5:56:16 PM
38.63 USD
0 (0%)
After Hours: 12/12/2025, 5:56:16 PM
CSTL Ownership Chart.CSTL Ownership Chart: showing Insider, Institutional ownership and shares available to the public.CSTL Ownership.InsiderInstitutionalPublic



Shares Outstanding29.19M
Float27.89M
Float Short Interest Percentage5.89%
Owners (insider)2.48%
Owners (institutional)90.57%
Owners (insider) change-3.61%
Owners (institutional) change-3.52%
CSTL Institutional Ownership HistoryCSTL Institutional Ownership HistoryCSTL Institutional Ownership History Sep 2021 Mar 2022 Sep 2022 Mar 2023 Sep 2023 Mar 2024 Sep 2024 Mar 2025 Sep 2025 5M 10M 15M 20M 25M
CSTL Historical Insider Transactions ChartCSTL Historical Insider Buy and Sell Transactions ChartCSTL Historical Insider Transactions Jan 2025 Feb 2025 Mar 2025 Apr 2025 May 2025 Jun 2025 Jul 2025 Aug 2025 Sep 2025 Oct 2025 Nov 2025 Dec 2025 0 20K -20K 40K -40K 60K -60K
Date Name Type Shares Price Amount
Dec 9, 2025 Stokes Frank Option Excercise 20786 $ 0.00
Dec 9, 2025 Stokes Frank Option Excercise 9292 38.18 $ 354,784.66
Dec 9, 2025 Juvenal Tobin W Option Excercise 22131 $ 0.00
Dec 9, 2025 Juvenal Tobin W Option Excercise 8931 38.19 $ 341,038.05
Dec 9, 2025 Oelschlager Kristen M Option Excercise 22131 $ 0.00
Dec 9, 2025 Oelschlager Kristen M Option Excercise 7243 38.17 $ 276,457.79
Dec 4, 2025 MAETZOLD DEREK J Open Market Sale 1339 40.03 $ 53,600.17
Dec 2, 2025 MAETZOLD DEREK J Open Market Sale 2678 39.23 $ 105,057.94
Nov 26, 2025 MAETZOLD DEREK J Open Market Sale 4258 40.09 $ 170,703.22
Nov 25, 2025 MAETZOLD DEREK J Open Market Sale 5115 40.05 $ 204,850.64
Nov 20, 2025 Juvenal Tobin W Option Excercise 4693 3.38 $ 15,862.34
Nov 20, 2025 Juvenal Tobin W Open Market Sale 4693 35.58 $ 166,976.94
Nov 18, 2025 MAETZOLD DEREK J Open Market Sale 2678 34.02 $ 91,105.56
Nov 11, 2025 Stokes Frank Open Market Sale 5388 35.08 $ 189,011.04
Nov 11, 2025 Juvenal Tobin W Open Market Sale 700 35.39 $ 24,775.00
Nov 11, 2025 Oelschlager Kristen M Open Market Sale 18932 35.10 $ 664,513.20
Nov 11, 2025 Juvenal Tobin W Option Excercise 700 3.38 $ 2,366.00
Nov 11, 2025 Juvenal Tobin W Open Market Sale 700 35.39 $ 24,775.00
Nov 4, 2025 MAETZOLD DEREK J Open Market Sale 9373 30.84 $ 289,078.86
Oct 20, 2025 MAETZOLD DEREK J Open Market Sale 1339 22.44 $ 30,047.16
Oct 2, 2025 MAETZOLD DEREK J Open Market Sale 1339 22.58 $ 30,234.62
Sep 17, 2025 MAETZOLD DEREK J Open Market Sale 1339 21.97 $ 29,419.17
Sep 2, 2025 MAETZOLD DEREK J Open Market Sale 1339 23.93 $ 32,042.27
Aug 27, 2025 Oelschlager Kristen M Open Market Sale 12677 22.02 $ 279,134.86
Aug 27, 2025 Oelschlager Kristen M Open Market Sale 18007 21.69 $ 390,571.83
Aug 15, 2025 MAETZOLD DEREK J Open Market Sale 1339 20.04 $ 26,833.56
Aug 13, 2025 MAETZOLD DEREK J Open Market Sale 43019 19.50 $ 839,042.58
Aug 8, 2025 Oelschlager Kristen M Option Excercise 10640 0.00 $ 0.00
Aug 8, 2025 Oelschlager Kristen M Option Excercise 2804 19.36 $ 54,285.44
Aug 8, 2025 Juvenal Tobin W Option Excercise 10640 0.00 $ 0.00
Aug 8, 2025 Juvenal Tobin W Option Excercise 4294 19.36 $ 83,131.84
Aug 8, 2025 MAETZOLD DEREK J Option Excercise 66991 0.00 $ 0.00
Aug 8, 2025 MAETZOLD DEREK J Option Excercise 23972 19.36 $ 464,097.92
Aug 8, 2025 Stokes Frank Option Excercise 9744 0.00 $ 0.00
Aug 8, 2025 Stokes Frank Option Excercise 4356 19.36 $ 84,332.16
Jun 27, 2025 MAETZOLD DEREK J Open Market Sale 22576 20.30 $ 458,292.80
May 21, 2025 Harrison Miles Option Excercise 8673 $ 0.00
May 21, 2025 BRADBURY DANIEL Option Excercise 8673 $ 0.00
May 21, 2025 Cotton Rodney Option Excercise 8673 $ 0.00
May 21, 2025 Caple Kim Option Excercise 8673 $ 0.00
May 21, 2025 Goldberg Ellen Option Excercise 8673 $ 0.00
May 21, 2025 Cole G Bradley Option Excercise 8673 $ 0.00
May 21, 2025 Olson Tiffany Option Excercise 8673 $ 0.00
Apr 21, 2025 MAETZOLD DEREK J Open Market Sale 5644 21.52 $ 121,447.59
Apr 9, 2025 MAETZOLD DEREK J Open Market Sale 5644 20.19 $ 113,931.95
Mar 26, 2025 MAETZOLD DEREK J Open Market Sale 5644 20.30 $ 114,573.20
Mar 26, 2025 Cotton Rodney Option Excercise 5329 $ 0.00
Mar 7, 2025 MAETZOLD DEREK J Open Market Sale 29177 20.07 $ 585,673.31
Mar 4, 2025 Stokes Frank Option Excercise 12186 $ 0.00
Mar 4, 2025 Stokes Frank Option Excercise 5448 22.23 $ 121,109.04
Mar 4, 2025 Oelschlager Kristen M Option Excercise 13811 $ 0.00
Mar 4, 2025 Oelschlager Kristen M Option Excercise 3640 22.23 $ 80,917.20
Mar 4, 2025 MAETZOLD DEREK J Option Excercise 31109 $ 0.00
Mar 4, 2025 MAETZOLD DEREK J Option Excercise 7576 22.23 $ 168,414.48
Mar 4, 2025 MAETZOLD DEREK J Open Market Sale 5687 20.86 $ 118,619.45
Mar 4, 2025 Juvenal Tobin W Option Excercise 13811 $ 0.00
Mar 4, 2025 Juvenal Tobin W Option Excercise 5573 22.23 $ 123,887.79
Feb 20, 2025 Stokes Frank Open Market Sale 8046 26.70 $ 214,828.20
Feb 5, 2025 BRADBURY DANIEL Open Market Sale 7867 28.17 $ 221,636.99
Jan 13, 2025 MAETZOLD DEREK J Open Market Sale 2565 28.03 $ 71,902.93
Jan 6, 2025 BRADBURY DANIEL Open Market Sale 7867 29.14 $ 229,225.91
Jan 6, 2025 MAETZOLD DEREK J Open Market Sale 7689 29.66 $ 228,066.82
Jan 6, 2025 Juvenal Tobin W Open Market Sale 2230 30.00 $ 66,900.00
Dec 17, 2024 MAETZOLD DEREK J Open Market Sale 9364 28.34 $ 265,357.92
Dec 16, 2024 MAETZOLD DEREK J Open Market Sale 11059 28.83 $ 318,864.15