CASTLE BIOSCIENCES INC
Total Trades
125
Buys
3
Sells
118
Largest Trade
$1M+
Insiders
7
Institutional Funds
149
Inst. Value
$1M+
Activist Filings
17
Insider Trades
| Insider | Title | Type | Value | Shares | Price | Date |
|---|---|---|---|---|---|---|
| BRADBURY DANIEL | Director | SELL | $100K–$500K | 8K | $25.49 | Nov 3, 2022 |
| MAETZOLD DEREK J | Pres. & Chief Exec… | SELL | $100K–$500K | 9K | $20.46 | Oct 26, 2022 |
| MAETZOLD DEREK J | Pres. & Chief Exec… | SELL | $1K–$15K | 560 | $24.05 | Oct 12, 2022 |
| MAETZOLD DEREK J | Pres. & Chief Exec… | SELL | $100K–$500K | 8K | $24.28 | Oct 12, 2022 |
| MAETZOLD DEREK J | Pres. & Chief Exec… | SELL | $15K–$50K | 1K | $30.03 | Oct 6, 2022 |
| BRADBURY DANIEL | Director | SELL | $100K–$500K | 8K | $27.17 | Oct 5, 2022 |
| MAETZOLD DEREK J | Pres. & Chief Exec… | SELL | $100K–$500K | 9K | $24.03 | Sep 28, 2022 |
| MAETZOLD DEREK J | Pres. & Chief Exec… | SELL | $100K–$500K | 9K | $29.17 | Sep 14, 2022 |
| BRADBURY DANIEL | Director | SELL | $100K–$500K | 8K | $28.08 | Sep 6, 2022 |
| MAETZOLD DEREK J | Pres. & Chief Exec… | SELL | $100K–$500K | 10K | $29.55 | Aug 31, 2022 |
| MAETZOLD DEREK J | Pres. & Chief Exec… | SELL | $1K–$15K | 36 | $32.83 | Aug 17, 2022 |
| MAETZOLD DEREK J | Pres. & Chief Exec… | SELL | $500K+ | 19K | $33.00 | Aug 17, 2022 |
| MAETZOLD DEREK J | Pres. & Chief Exec… | SELL | $15K–$50K | 2K | $30.31 | Aug 9, 2022 |
| MAETZOLD DEREK J | Pres. & Chief Exec… | SELL | $100K–$500K | 8K | $30.73 | Aug 5, 2022 |
| MAETZOLD DEREK J | Pres. & Chief Exec… | SELL | $100K–$500K | 9K | $27.43 | Aug 3, 2022 |
| BRADBURY DANIEL | Director | SELL | $100K–$500K | 8K | $27.47 | Aug 3, 2022 |
| Olson Tiffany | Director | BUY | $15K–$50K | 1K | $18.76 | Jul 7, 2022 |
| BRADBURY DANIEL | Director | SELL | $500K+ | 18K | $45.12 | Mar 31, 2022 |
| BRADBURY DANIEL | Director | SELL | $500K+ | 18K | $37.39 | Mar 16, 2022 |
| BRADBURY DANIEL | Director | SELL | $500K+ | 18K | $39.13 | Feb 24, 2022 |
| BRADBURY DANIEL | Director | SELL | $500K+ | 18K | $46.00 | Feb 11, 2022 |
| BRADBURY DANIEL | Director | SELL | $500K+ | 15K | $35.42 | Jan 26, 2022 |
| BRADBURY DANIEL | Director | SELL | $500K+ | 16K | $35.26 | Jan 24, 2022 |
| BRADBURY DANIEL | Director | SELL | $50K–$100K | 2K | $35.30 | Jan 20, 2022 |
| BRADBURY DANIEL | Director | SELL | $1M+ | 33K | $42.86 | Jan 6, 2022 |
Institutional Ownership
13F filings as of Dec 31, 2025 · 149 funds holding
| Fund | Shares | Value | Type |
|---|---|---|---|
| VANGUARD GROUP INC | 2.0M | $1M+ | SH |
| Portolan Capital Management, LLC | 1.7M | $1M+ | SH |
| DIMENSIONAL FUND ADVISORS LP | 1.1M | $1M+ | SH |
| STATE STREET CORP | 736K | $1M+ | SH |
| GEODE CAPITAL MANAGEMENT, LLC | 620K | $1M+ | SH |
| Allianz Asset Management GmbH | 598K | $1M+ | SH |
| WASATCH ADVISORS LP | 537K | $1M+ | SH |
| SCHRODER INVESTMENT MANAGEMENT GROUP | 492K | $1M+ | SH |
| RENAISSANCE TECHNOLOGIES LLC | 493K | $1M+ | SH |
| ACADIAN ASSET MANAGEMENT LLC | 390K | $1M+ | SH |
| Connor, Clark & Lunn Investment Management Ltd. | 388K | $1M+ | SH |
| EVENTIDE ASSET MANAGEMENT, LLC | 305K | $1M+ | SH |
| KORNITZER CAPITAL MANAGEMENT INC /KS | 268K | $1M+ | SH |
| Advisors Capital Management, LLC | 251K | $1M+ | SH |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 243K | $1M+ | SH |
| NEW YORK STATE COMMON RETIREMENT FUND | 233K | $1M+ | SH |
| BRAIDWELL LP | 177K | $1M+ | SH |
| AIGH Capital Management LLC | 169K | $1M+ | SH |
| TUDOR INVESTMENT CORP ET AL | 167K | $1M+ | SH |
| BNP PARIBAS FINANCIAL MARKETS | 150K | $1M+ | SH |
Activist & 5%+ Owners
SC 13D/13G filings — investors holding 5%+ of outstanding shares
SC 13G/A · Jan 21, 2026
3.9%
1.1M shares
SC 13G · Oct 9, 2025
5.1%
1.5M shares
SC 13G/A · May 12, 2025
3.5%
998K shares
SC 13G/A · Apr 24, 2025
8.2%
2.3M shares
Portolan Capital Management, LLC
SC 13G · Apr 14, 2025
5.7%
1.6M shares
SC 13G/A · Jan 31, 2025
6.5%
1.8M shares
Granahan Investment Management LLC
SC 13G/A · Nov 14, 2024
1.5%
425K shares
Wasatch Advisors LP 87-0319391
SC 13G/A · Nov 13, 2024
6.6%
1.8M shares
SC 13G/A · Jul 8, 2024
11.0%
3.0M shares
Granahan Investment Management LLC
SC 13G · Feb 14, 2024
8.1%
2.2M shares
The Vanguard Group - 23-1945930
SC 13G/A · Feb 13, 2024
5.4%
1.5M shares
Principal Global Investors, LLC
SC 13G · Feb 13, 2024
5.9%
1.6M shares
SC 13G/A · Jan 25, 2024
8.5%
2.3M shares
Wasatch Advisors LP 87-0319391
SC 13G/A · Feb 9, 2023
12.2%
3.2M shares
SC 13G/A · Feb 3, 2023
8.1%
2.1M shares
SC 13G/A · Feb 11, 2022
4.0%
1.0M shares
Wasatch Advisors, Inc. 87-0319391
SC 13G/A · Feb 10, 2022
12.3%
3.1M shares