Castle Biosciences director receives RSU grant

Goldberg Ellen reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Goldberg Ellen reported acquisition or exercise transactions in this Form 4 filing.

CASTLE BIOSCIENCES INC director Ellen Goldberg received a grant of 11,766 Restricted Stock Units (RSUs). Each RSU represents one share of the company’s common stock, so this award covers 11,766 shares. Following the grant, she holds 11,766 RSUs directly.

The RSUs vest in full on the earlier of May 28, 2027, or the day immediately before the next Annual Meeting of Stockholders following the grant date. This is a compensation-related equity award, not an open‑market share purchase or sale.

Insider Trade Summary

Grant/Award: 11,766 shares

Grant/Award 1 txn

Insider Goldberg Ellen

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Units	11,766	$0.00	$0.00

Holdings After Transaction: Restricted Stock Units — 11,766 contracts (Direct)

Footnotes (2)

1. F1. Each Restricted Stock Unit ("RSU") represents the right to receive one share of the Issuer's Common Stock.
2. F2. The RSUs vest in full on the earlier of the (a) one-year anniversary of the date on May 28, 2027, or (b) the day immediately preceding the next Annual Meeting of Stockholders following the date of the grant.

Key Figures

RSUs granted: 11,766 units Underlying common stock: 11,766 shares Holdings after grant: 11,766 RSUs +1 more

4 metrics

RSUs granted 11,766 units Grant to director Ellen Goldberg on May 28, 2026

Underlying common stock 11,766 shares Each RSU represents one share of common stock

Holdings after grant 11,766 RSUs Total derivative securities following the reported transaction

RSU vesting date May 28, 2027 Vests earlier of this date or before next Annual Meeting

Key Terms

Restricted Stock Units, Common Stock, Annual Meeting of Stockholders, vest in full

4 terms

Restricted Stock Units financial

"Each Restricted Stock Unit ("RSU") represents the right to receive one share"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

Common Stock financial

"Each Restricted Stock Unit ("RSU") represents the right to receive one share of the Issuer's Common Stock."

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

Annual Meeting of Stockholders financial

"the day immediately preceding the next Annual Meeting of Stockholders following the date of the grant."

vest in full financial

"The RSUs vest in full on the earlier of the (a) one-year anniversary"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did the Form 4 for CASTLE BIOSCIENCES (CSTL) report for Ellen Goldberg?

The Form 4 reports that director Ellen Goldberg received a grant of 11,766 Restricted Stock Units. These RSUs are a stock-based compensation award, each representing one share of Castle Biosciences common stock, and are not an open‑market stock purchase or sale.

How many shares are covered by Ellen Goldberg’s RSU grant at CASTLE BIOSCIENCES (CSTL)?

Ellen Goldberg’s award covers 11,766 Restricted Stock Units, tied to 11,766 shares of common stock. After this grant, her reported derivative holdings consist of these 11,766 RSUs, reflecting a new equity-based compensation position in the company.

When do Ellen Goldberg’s RSUs in CASTLE BIOSCIENCES (CSTL) vest?

The RSUs vest in full on the earlier of May 28, 2027, or the day immediately preceding the next Annual Meeting of Stockholders following the grant date. Vesting must occur before the underlying common shares are delivered to the director.

Is Ellen Goldberg’s CASTLE BIOSCIENCES (CSTL) Form 4 transaction a stock purchase or sale?

No. The Form 4 shows a grant of 11,766 Restricted Stock Units coded as an acquisition (grant or award). This is a compensation-related equity award rather than an open‑market purchase or sale of Castle Biosciences common stock.

What type of security did CASTLE BIOSCIENCES (CSTL) grant to director Ellen Goldberg?

She received Restricted Stock Units, a derivative security that converts into common stock upon vesting. Each RSU equals one share of Castle Biosciences common stock, giving equity exposure that depends on remaining in service through the vesting date.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 06/01/2026 - 04:48 PM EDT Learn about SEC filing dates

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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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^*

Goldberg Ellen

(Last) (First) (Middle)

C/O CASTLE BIOSCIENCES, INC.

1500 W. PARKWOOD AVE SUITE 400

(Street)

FRIENDSWOOD TEXAS 77546

(City) (State) (Zip)

UNITED STATES

(Country)

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
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/28/2026

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

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

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

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)
			Code	V	Amount	(A) or (D)	Price

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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Units	(1)	05/28/2026		A		11,766		(2)	(2)	Common Stock	11,766	$0	11,766	D

Explanation of Responses:

1. Each Restricted Stock Unit ("RSU") represents the right to receive one share of the Issuer's Common Stock.

2. The RSUs vest in full on the earlier of the (a) one-year anniversary of the date on May 28, 2027, or (b) the day immediately preceding the next Annual Meeting of Stockholders following the date of the grant.

Remarks:

	/s/ Frank Stokes, Attorney-in-fact	06/01/2026
	** 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.
* Form 4: SEC 1474 (03-26)