MAETZOLD DEREK J

PrivateCIK: 1239501
Location

FRIENDSWOOD, TX

Senior insider sale

Pres. & Chief Exec. Officer at CASTLE BIOSCIENCES INC — senior position signals high conviction

$3.34M

124.44K shares

What this filing means

MAETZOLD DEREK J plans to sell 124.44K shares of CASTLE BIOSCIENCES INC valued at approximately $3.34M. Form 144 is a notice of intent to sell restricted or control securities — not a mandatory transaction. This filing provides advance warning of potential selling pressure.

InsiderMAETZOLD DEREK JCIK 1239501
IssuerCASTLE BIOSCIENCES INCCIK 1447362
DirectorOfficer10% Owner· Pres. & Chief Exec. Officer
Since Jul 2019
124.44K
Shares to sell
$3.34M
Approx. market value
18.18K
Acquired (3 months)
1
Planned
31 completed
Securities Acquired — Last 3 Months7
Sort

Acquired as compensation -- Stock Options

Compensation -- Cashless exercise / same-day sale

11/12/2018
7.31K

Acquired as gift

None

Gift
10/29/2007
4.07K

Acquired as gift

None

Gift
10/29/2007
3.46K

Acquired as gift

None

Gift
10/29/2007
834.00

Acquired as gift

None

Gift
10/29/2007
834.00

Acquired as gift

None

Gift
10/29/2007
834.00

Acquired as gift

None

Gift
10/29/2007
834.00
Total acquired18.18K
Planned & Completed Dispositions32
Sort

Completed

Completed

Units to sell

650.00

Market value

$16.5K

3/18/2026
Completed

Units to sell

18.65K

Market value

$482.4K

3/17/2026
Completed

Units to sell

17.57K

Market value

$455.4K

3/16/2026
Completed

Units to sell

13.20K

Market value

$335.2K

3/13/2026
Completed

Units to sell

23.18K

Market value

$584.5K

3/12/2026
Completed

Units to sell

498.00

Market value

$13.1K

3/11/2026
Completed

Units to sell

116.00

Market value

$3.0K

3/11/2026
Completed

Units to sell

736.00

Market value

$19.3K

3/11/2026
Completed

Units to sell

116.00

Market value

$3.0K

3/11/2026
Completed

Units to sell

5.68K

Market value

$147.0K

3/11/2026
Completed

Units to sell

662.00

Market value

$17.3K

3/11/2026
Completed

Units to sell

163.00

Market value

$4.3K

3/11/2026
Completed

Units to sell

83.00

Market value

$2.2K

3/11/2026
Completed

Units to sell

5.41K

Market value

$140.1K

3/11/2026
Completed

Units to sell

621.00

Market value

$16.3K

3/11/2026
Completed

Units to sell

3.59K

Market value

$93.9K

3/11/2026
Completed

Units to sell

2.64K

Market value

$69.3K

3/11/2026
Completed

Units to sell

113.00

Market value

$3.0K

3/11/2026
Completed

Units to sell

163.00

Market value

$4.3K

3/11/2026
Completed

Units to sell

166.00

Market value

$4.3K

3/11/2026
Completed

Units to sell

199.00

Market value

$5.2K

3/11/2026
Completed

Units to sell

817.00

Market value

$31.0K

2/4/2026
Completed

Units to sell

1.34K

Market value

$53.3K

2/3/2026
Completed

Units to sell

522.00

Market value

$20.9K

2/3/2026
Completed

Units to sell

1.34K

Market value

$53.3K

2/3/2026
Completed

Units to sell

1.34K

Market value

$53.4K

1/20/2026
Completed

Units to sell

1.34K

Market value

$53.5K

1/20/2026
Completed

Units to sell

1.34K

Market value

$53.6K

1/20/2026
Completed

Units to sell

1.34K

Market value

$53.6K

1/6/2026
Completed

Units to sell

1.34K

Market value

$50.9K

1/5/2026
Completed

Units to sell

1.34K

Market value

$50.9K

1/5/2026

Planned — Approximate Date

NASDPlanned

Units to sell

18.18K

Market value

$449.0K

3/26/2026
Total

Units

124.44K

Value

$3.34M

MAETZOLD DEREK J — Planned Insider Sale (Form 144) | Finecho