Castle Biosciences Inc

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Castle Biosciences Inc
TickerCSTL
CIK #0001447362
CUSIP14843C105
SectorLife Sciences - Services-Medical Laboratories
Address820 S Friendswood Drive Suite 201, Friendswood, TX 77546
Source [EDGAR]
Reg D Offering (Form D) Filed Raised Terms
Castle Biosciences Inc 2019-07-30 10.0 M Exemption: 506(b) · Remaining: $10,000,000 · Duration: One year or less · Revenue: Decline to Disclose
CIK Filing 2011 - 2026
[0001447362] 10-K
[0001447362] 10-Q
[0001447362] 3
[0001447362] 4
[0001447362] 5
[0001447362] 8-K
[0001447362] D
[0001447362] SC 13D
[0001447362] SC 13G
Form 13D/13G Filer Form 13D/13G Subject Filed % Owned
RTW Investments LP Castle Biosciences Inc [2026-02-17] 0.0
Dimensional Fund Advisors LP Castle Biosciences Inc [2025-10-09] 0.0
Portolan Capital Management LLC Castle Biosciences Inc [2025-04-14] 0.0
Granahan Investment Management LLC Castle Biosciences Inc [2024-02-14] 8.05
Principal Global Investors Castle Biosciences Inc [2024-02-13] 5.89
Vanguard Group Inc Castle Biosciences Inc [2023-02-09] 5.29
BlackRock Inc Castle Biosciences Inc [2022-02-04] 7.1
Wasatch Advisors Inc Castle Biosciences Inc [2021-02-11] 8.4
Ark Investment Management LLC Castle Biosciences Inc [2021-02-10] 10.44
Maetzold Derek J Castle Biosciences Inc [2020-02-12] 11.3
Bradbury Daniel Castle Biosciences Inc [2020-02-12] 5.3
MGC Venture Partners 2013 GP LLC Castle Biosciences Inc [2020-02-11] 8.8
Industry Ventures Healthcare LLC Castle Biosciences Inc [2020-02-05] 7.3
Sofinnova Healthquest Partners LP Castle Biosciences Inc [2019-08-05] 11.0
Form 3/4/5 Filer 2011 - 2026
Castle Biosciences Inc
Maetzold Derek J
Oelschlager Kristen M
Cole G Bradley
Olson Tiffany
Caple Kim
Goldberg Ellen
Harrison Miles
Bradbury Daniel
Cotton Rodney
Juvenal Tobin W
Stokes Frank
Aspinall Mara G
Spiess Bernhard E
Kabakoff David S
Cook Joseph C III
Anderson Bonnie H
Monzon Federico A
MGC Venture Partners 2013 GP LLC
MGC Venture Partners 2018 LP
MGC Venture Partners 2013 LP
MGC Venture Partners QP 2018 LP
MGC Venture Partners 2018 GP LLC
Kong Garheng
Sofinnova HealthQuest Partners LP
HealthQuest Venture Management LLC
Insider Transaction (Form 3/4/5) Date Action Shares Price Value ($)
Maetzold Derek J
Common Stock
2026-03-26 Sell 1,357 $25.55 34,671
Cotton Rodney
Restricted Stock Units · derivative
2026-03-26 Option exercise 5,329 $0.00
Maetzold Derek J
Common Stock
2026-03-26 Sell 278 $25.55 7,103
Maetzold Derek J
Common Stock
2026-03-26 Sell 278 $25.55 7,103
Maetzold Derek J
Common Stock
2026-03-26 Sell 278 $25.55 7,103
Maetzold Derek J
Common Stock
2026-03-26 Sell 1,153 $25.55 29,459
Maetzold Derek J
Common Stock
2026-03-26 Sell 550 $25.55 14,052
Maetzold Derek J
Common Stock
2026-03-26 Option exercise 550 $2.39 1,314
Cotton Rodney
Common Stock
2026-03-26 Option exercise 5,329
Maetzold Derek J
Common Stock
2026-03-26 Sell 278 $25.55 7,103
Maetzold Derek J
Stock option (right to buy) · derivative
2026-03-26 Option exercise 550 $0.00
Maetzold Derek J
Common Stock
2026-03-18 Sell 650 $25.39 16,504
Maetzold Derek J
Common Stock
2026-03-17 Sell 18,650 $25.93 483,594
Maetzold Derek J
Common Stock
2026-03-16 Sell 126 $26.68 3,362
Maetzold Derek J
Common Stock
2026-03-16 Sell 17,449 $25.96 452,976
Maetzold Derek J
Common Stock
2026-03-13 Sell 13,204 $25.45 336,042
Juvenal Tobin W
Common Stock
2026-03-12 Sell 20,863 $25.24 526,582
Maetzold Derek J
Common Stock
2026-03-12 Sell 23,179 $25.28 585,965
Maetzold Derek J
Common Stock
2026-03-11 Sell 279 $26.11 7,285
Maetzold Derek J
Common Stock
2026-03-11 Option exercise 6,226 $2.39 14,880
showing 20 of 200 most recent transactions
13F Ownership Over TimeHoldersShares Held
2026-03-31 187 26,869,846
2025-12-31 196 26,915,237
2025-09-30 173 26,154,662
2025-06-30 152 25,770,625
2025-03-31 181 25,026,153
2024-12-31 200 26,112,891
2024-09-30 189 25,591,506
2024-06-30 161 25,391,326
2024-03-31 153 26,190,870
2023-12-31 154 24,212,776
2023-09-30 136 22,622,458
2023-06-30 131 22,476,374
Form 13F Holdings
Firm Period DFND Voting Shares
Wasatch Advisors LP [2026-06-30] SOLE 279,349 279,349
Y-Intercept Hong Kong Ltd [2026-06-30] SOLE 31,916 31,916
First Bank & Trust [2026-06-30] SOLE 18,591 18,591
Counterpoint Mutual Funds LLC [2026-06-30] SOLE 16,510 16,510
Curated Wealth Partners LLC [2026-06-30] OTR 0 15,000
Farther Finance Advisors LLC [2026-06-30] SOLE 0 1,806
Alaska Retirement Management Board [2026-06-30] SOLE 1,553 1,553
First Horizon Corp [2026-06-30] DFND 0 662
Hughes Financial Services LLC [2026-06-30] SOLE 436 436
Versant Capital Management Inc [2026-06-30] SOLE 126 126
BFSG LLC [2026-06-30] SOLE 0 90
IFP Advisors LLC [2026-06-30] SOLE 60 60
Spire Wealth Management [2026-06-30] SOLE 0 50
True Wealth Design LLC [2026-06-30] SOLE 0 42
Gamma Investing LLC [2026-06-30] DFND 19 19
Fortitude Family Office LLC [2026-06-30] SOLE 1 1
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