SEC FORM 4

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

MAETZOLD DEREK J

(Last)

(First)

(Middle)

C/O CASTLE BIOSCIENCES, INC.

505 S. FRIENDSWOOD DRIVE, SUITE 401

(Street)

FRIENDSWOOD

77546

(City)

(State)

(Zip)

2. Issuer Name and Ticker or Trading Symbol
CASTLE BIOSCIENCES INC [ CSTL ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	Pres. & Chief Exec. Officer

3. Date of Earliest Transaction (Month/Day/Year)
12/27/2023

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	12/27/2023		S⁽¹⁾		8,076	D	$21.9⁽²⁾	68,038	D
Common Stock	12/27/2023		S⁽¹⁾		329	D	$21.9⁽²⁾	92,246	I	By The Maetzold Descendants 2020 Trust⁽³⁾
Common Stock	12/27/2023		S⁽¹⁾		329	D	$21.9⁽²⁾	81,141	I	By Derek Maetzold 2020 Irrevocable Trust⁽⁴⁾
Common Stock	12/27/2023		S⁽¹⁾		122	D	$21.9⁽²⁾	11,696	I	By The Maetzold 2018 Remainder Trust FBO Emily Carol Kirk⁽⁵⁾
Common Stock	12/27/2023		S⁽¹⁾		119	D	$21.9⁽²⁾	11,694	I	By The Maetzold 2018 Remainder Trust FBO Hannah Elizabeth Maetzold⁽⁶⁾
Common Stock	12/27/2023		S⁽¹⁾		119	D	$21.9⁽²⁾	11,693	I	By The Maetzold 2018 Remainder Trust FBO John Derek Maetzold⁽⁷⁾
Common Stock	12/27/2023		S⁽¹⁾		119	D	$21.9⁽²⁾	11,688	I	By The Maetzold 2018 Remainder Trust FBO Peter Douglas Maetzold⁽⁸⁾
Common Stock	12/28/2023		S⁽¹⁾		3,954	D	$22.17⁽⁹⁾	64,084	D
Common Stock	12/28/2023		S⁽¹⁾		161	D	$22.17⁽⁹⁾	92,085	I	By The Maetzold Descendants 2020 Trust⁽³⁾
Common Stock	12/28/2023		S⁽¹⁾		161	D	$22.17⁽⁹⁾	80,980	I	By Derek Maetzold 2020 Irrevocable Trust⁽⁴⁾
Common Stock	12/28/2023		S⁽¹⁾		58	D	$22.17⁽⁹⁾	11,638	I	By The Maetzold 2018 Remainder Trust FBO Emily Carol Kirk⁽⁵⁾
Common Stock	12/28/2023		S⁽¹⁾		59	D	$22.17⁽⁹⁾	11,635	I	By The Maetzold 2018 Remainder Trust FBO Hannah Elizabeth Maetzold⁽⁶⁾
Common Stock	12/28/2023		S⁽¹⁾		59	D	$22.17⁽⁹⁾	11,634	I	By The Maetzold 2018 Remainder Trust FBO John Derek Maetzold⁽⁷⁾
Common Stock	12/28/2023		S⁽¹⁾		59	D	$22.17⁽⁹⁾	11,629	I	By The Maetzold 2018 Remainder Trust FBO Peter Douglas Maetzold⁽⁸⁾
Common Stock								149,000	I	By DJM Grantor Retained Annuity Trust No. 5⁽¹⁰⁾

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

1. These transactions were made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person, The Maetzold Descendants 2020 Trust, Derek Maetzold 2020 Irrevocable Trust, The Maetzold 2018 Remainder Trust f/b/o Emily Carol Kirk, The Maetzold 2018 Remainder Trust f/b/o Hannah Elizabeth Maetzold, The Maetzold 2018 Remainder Trust f/b/o John Derek Maetzold, and The Maetzold 2018 Remainder Trust f/b/o Peter Douglas Maetzold on March 16, 2023.

2. This transaction was executed in multiple trades at prices ranging from $21.83 to $22.05, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

3. Held by The Maetzold Descendants 2020 Trust of which the Reporting Person's spouse is the trustee and the Reporting Person's spouse and their children are beneficiaries.

4. Held by Derek Maetzold 2020 Irrevocable Trust of which the Reporting Person is the trustee and his children are beneficiaries.

5. Held by The Maetzold 2018 Remainder Trust FBO Emily Carol Kirk of which the Reporting Person is the trustee and his child is the beneficiary.

6. Held by The Maetzold 2018 Remainder Trust FBO Hannah Elizabeth Maetzold of which the Reporting Person is the trustee and his child is the beneficiary.

7. Held by The Maetzold 2018 Remainder Trust FBO John Derek Maetzold of which the Reporting Person is the trustee and his child is the beneficiary.

8. Held by The Maetzold 2018 Remainder Trust FBO Peter Douglas Maetzold of which the Reporting Person is the trustee and his child is the beneficiary.

9. This transaction was executed in multiple trades at prices ranging from $22.12 to $22.27, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

10. Held by DJM Grantor Retained Annuity Trust No. 5 of which the Reporting Person is the trustee and beneficiary.

Remarks:

	/s/ Frank Stokes, Attorney-in-fact	12/28/2023
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.