Ceribell CTO sells shares to cover RSU taxes

Ceribell, Inc. Chief Technology Officer Raymond Woo reported a small sale of 1,966 shares of Common Stock at $18.00 per share.

Rhea-AI Filing Summary

Ceribell, Inc. Chief Technology Officer Raymond Woo reported a small sale of 1,966 shares of Common Stock at $18.00 per share. According to the footnote, these shares were sold to cover tax withholding obligations tied to the vesting of restricted stock units. After this transaction, Woo directly owns 195,682 shares, so the sale represents only a minor portion of his overall holdings and appears to be a routine tax-related event rather than a large discretionary trade.

Insider Trade Summary

Net Seller: 1,966 shares

Net Sell 1 txn

Insider Woo Raymond

Role Chief Technology Officer

Sold 1,966 shs ($35K)

Type	Security	Shares	Price	Value
Sale	Common Stock	1,966	$18.00	$35K

Holdings After Transaction: Common Stock — 195,682 shares (Direct)

Footnotes (1)

1. F1. These shares were sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units ("RSUs").

Key Figures

Shares sold: 1,966 shares Sale price: $18.00 per share Shares owned after transaction: 195,682 shares +1 more

4 metrics

Shares sold 1,966 shares Common Stock sold on 2026-05-21

Sale price $18.00 per share Price for the 1,966 shares sold

Shares owned after transaction 195,682 shares Direct holdings after sale

Net buy/sell shares -1,966 shares Net effect of reported transactions

Key Terms

restricted stock units ("RSUs"), tax withholding obligations, Common Stock, open-market sale

4 terms

restricted stock units ("RSUs") financial

"in connection with the vesting of restricted stock units ("RSUs")."

Restricted stock units (RSUs) are a company promise to give an employee shares of stock (or cash equivalent) in the future, but only after certain conditions—usually staying with the company for a set time or hitting performance goals—are met. Investors watch RSUs because when they vest they increase the number of shares outstanding and can lead insiders to sell shares, affecting share price, company dilution and the true cost of employee pay.

tax withholding obligations financial

"sold by the Reporting Person to cover tax withholding obligations in connection"

Common Stock financial

"security_title": "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.

open-market sale financial

"transaction_action": "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

FAQ

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

What insider transaction did Ceribell (CBLL) report for Raymond Woo?

Ceribell reported that Chief Technology Officer Raymond Woo sold 1,966 shares of Common Stock at $18.00 per share. The footnote explains the sale was made specifically to cover tax withholding obligations from vesting restricted stock units.

How many Ceribell (CBLL) shares does Raymond Woo hold after this Form 4?

After the reported transaction, Raymond Woo holds 195,682 shares of Ceribell Common Stock directly. This indicates the 1,966 shares sold to cover tax withholding obligations were a small fraction of his overall ownership position in the company.

Was the Ceribell (CBLL) insider sale by Raymond Woo a discretionary trade?

The filing states the 1,966 shares sold by Raymond Woo were used to cover tax withholding obligations from vesting restricted stock units. This language indicates the transaction was tax-related rather than a purely discretionary open-market sale decision.

What price was received in Raymond Woo’s Ceribell (CBLL) share sale?

The Form 4 shows that Raymond Woo’s 1,966 Common Stock shares were sold at $18.00 per share. This price applies specifically to the tax-related sale connected to RSU vesting, as described in the filing’s explanatory footnote.

Does this Ceribell (CBLL) Form 4 show any option or derivative exercises?

The insider filing summary indicates zero derivative transactions and no option or similar exercises. The only reported activity is the 1,966-share Common Stock sale used to satisfy tax withholding obligations from vesting restricted stock units.

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

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Accepted by SEC EDGAR 05/26/2026 - 04:17 PM 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^*

Woo Raymond

(Last) (First) (Middle)

C/O CERIBELL, INC.

360 N. PASTORIA AVENUE

(Street)

SUNNYVALE CALIFORNIA 94085

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Ceribell, Inc. [ CBLL ]

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Technology Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/21/2026

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
Common Stock	05/21/2026		S(1)		1,966	D	$18	195,682	D

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

Explanation of Responses:

1. These shares were sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units ("RSUs").

	/s/ Louisa Daniels, Attorney-in-Fact for Raymond Woo	05/26/2026
	** 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)