Ceribell (CBLL) files Form 3 listing director Sharon O’Keefe as reporting insider

Rhea-AI Filing Summary

Ceribell, Inc. filed an initial Form 3 identifying Sharon O’Keefe as a director. The filing lists her as a reporting person under SEC beneficial ownership rules but shows no insider transactions or derivative positions and does not disclose any specific share holdings.

Key Terms

Form 3, reporting person, ten percent owner, Power of Attorney

4 terms

Form 3 regulatory

"filed an initial Form 3 identifying Sharon O’Keefe as a director"

Form 3 is the initial public filing that officers, directors and large shareholders must submit to report their ownership of a company’s securities when they become insiders. It acts like an opening inventory sheet that gives investors a starting point to see who holds significant stakes and to spot later trades or potential conflicts of interest, helping assess insider confidence and transparency.

reporting person regulatory

"identifying Sharon O’Keefe as a director and reporting person"

ten percent owner regulatory

"She is not reported as an officer or ten percent owner"

Power of Attorney regulatory

"Exhibit 24 – Power of Attorney"

A power of attorney is a legal document that allows one person to make decisions and act on behalf of another person, often in financial or legal matters. It’s like giving someone a trusted helper or agent the authority to handle important tasks if you are unable to do so yourself. This matters to investors because it can impact how their assets are managed or transferred if they become unable to oversee their affairs.

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

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FAQ

What does Ceribell (CBLL) report in this Form 3 filing?

Ceribell’s Form 3 identifies Sharon O’Keefe as a director and reporting person. It is an initial beneficial ownership statement and does not list any share holdings, option positions, or insider transactions for her at this time.

Who is the reporting person in Ceribell (CBLL)’s Form 3?

The reporting person is Sharon O’Keefe, who is listed as a director of Ceribell, Inc. She is not reported as an officer or ten percent owner in this filing, and no transactions are disclosed for her.

Does the Ceribell (CBLL) Form 3 show any insider trades?

No insider trades are reported. The Form 3 lists no purchases, sales, exercises, or gifts. It serves purely as an initial registration of Sharon O’Keefe’s status as a director and SEC reporting person, with zero transactions summarized.

Is Sharon O’Keefe a ten percent owner of Ceribell (CBLL) in this Form 3?

In this filing, Sharon O’Keefe is not classified as a ten percent owner. She is reported only in her capacity as a director, and the structured data indicates the ten percent owner status box is not selected for her.

What additional documents are referenced in the Ceribell (CBLL) Form 3?

The Form 3 references an exhibit titled Exhibit 24 – Power of Attorney. This typically authorizes another party to sign SEC documents on the reporting person’s behalf, but it does not by itself indicate any security ownership or trades.

SEC Form 3

FORM 3

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

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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:			3235-0104
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

O'KEEFE SHARON

(Last) (First) (Middle)

C/O CERIBELL, INC.

360 N. PASTORIA AVENUE

(Street)

SUNNYVALE CALIFORNIA 94085

(City) (State) (Zip)

UNITED STATES

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
07/28/2026

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

3a. Foreign Trading Symbol

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

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

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

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 Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

Remarks:

Exhibit List: Exhibit 24 - Power of Attorney

No securities are beneficially owned.

	/s/ Louisa Daniels, Attorney-in-Fact for Sharon O'Keefe	07/30/2026
	** 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 5 (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 3: SEC 1473 (03-26)