Cero Therapeutics updates major holder stake

Cero Therapeutics Holdings, Inc. reported an updated ownership disclosure from shareholder Isaiah Tibbs.

Rhea-AI Filing Summary

Cero Therapeutics Holdings, Inc. reported an updated ownership disclosure from shareholder Isaiah Tibbs. Tibbs beneficially owns 2,089,000 shares of Cero Therapeutics common stock, representing 4.63% of the class, based on 45,112,406 shares outstanding as of the second quarter. All of these shares are reported with sole voting and sole dispositive power, with no shared voting or dispositive authority. The filing notes that the position now reflects ownership of 5 percent or less of the company’s common stock.

Key Figures

Shares beneficially owned: 2,089,000 shares Ownership percentage: 4.63% Shares outstanding: 45,112,406 shares +2 more

5 metrics

Shares beneficially owned 2,089,000 shares Common stock beneficially owned by Isaiah Tibbs

Ownership percentage 4.63% Percent of Cero Therapeutics common stock owned by Isaiah Tibbs

Shares outstanding 45,112,406 shares Common shares outstanding as of Q2, basis for ownership percentage

Sole voting power 2,089,000 shares Shares over which Tibbs has sole power to vote or direct the vote

Sole dispositive power 2,089,000 shares Shares over which Tibbs has sole power to dispose or direct disposition

Key Terms

beneficially owned, sole voting power, sole dispositive power, percent of class

4 terms

beneficially owned financial

"Ownership (a) | Amount beneficially owned: 2,089,000"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

sole voting power financial

"Sole power to vote or to direct the vote: 2,089,000"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

sole dispositive power financial

"Sole power to dispose or to direct the disposition of: 2,089,000"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

percent of class financial

"Percent of class: 4.63 - based on 45,112,406 shares"

Percent of class is the portion of a specific category of securities—such as a company’s common shares, preferred shares, or a bond series—that takes part in or approves a corporate action (vote, consent, tender, etc.). Investors watch this number because it reveals how much support or opposition exists within that particular shareholder group; like counting how many members of a club back a proposal, it can determine whether a plan passes or how influence is distributed.

FAQ

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

What ownership stake in CERO does Isaiah Tibbs report in this Schedule 13G/A?

Isaiah Tibbs reports beneficial ownership of 2,089,000 shares of Cero Therapeutics Holdings, Inc. (CERO) common stock, representing 4.63% of the outstanding class, based on 45,112,406 shares outstanding as of the second quarter.

Does Isaiah Tibbs have sole or shared voting power over his CERO shares?

Isaiah Tibbs reports sole voting power over 2,089,000 CERO shares and no shared voting power. He also has sole dispositive power over the same number of shares, with no shared dispositive power reported.

What percentage of CERO’s common stock is owned by Isaiah Tibbs?

Isaiah Tibbs reports beneficially owning 4.63% of Cero Therapeutics Holdings, Inc. (CERO) common stock. This percentage is calculated based on 45,112,406 shares of common stock outstanding as of the company’s second quarter.

How many CERO shares were outstanding for this ownership calculation?

The reported ownership percentage for Cero Therapeutics Holdings, Inc. (CERO) is based on 45,112,406 shares of common stock outstanding as of the second quarter, as stated in the ownership disclosure for shareholder Isaiah Tibbs.

Does the filing indicate Isaiah Tibbs owns more than 5% of CERO?

No. The filing states that Isaiah Tibbs owns 4.63% of Cero Therapeutics Holdings, Inc. (CERO) common stock and specifically notes ownership of 5 percent or less of the class, reflecting a sub‑5% position.

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

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Available on EDGAR 08/14/2026 - 04:03 PM Accepted by SEC EDGAR 08/14/2026 - 04:00 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

CERO THERAPEUTICS HOLDINGS, INC.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

15687V102

(CUSIP Number)

06/30/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 15687V102

1

Names of Reporting Persons

Tibbs Isaiah

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 2,089,000.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 2,089,000.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,089,000.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

4.63 %

12

Type of Reporting Person (See Instructions)

IN

SCHEDULE 13G

Item 1.
(a)	Name of issuer: CERO THERAPEUTICS HOLDINGS, INC.
(b)	Address of issuer's principal executive offices: 201 HASKINS WAY, SUITE 230, SOUTH SAN FRANCISCO, CALIFORNIA 94080
Item 2.
(a)	Name of person filing: Tibbs Isaiah
(b)	Address or principal business office or, if none, residence: 3906 N Lamar Blvd, Suite 201, Austin, TX 78756
(c)	Citizenship: United States
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: 15687V102
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 2,089,000
(b)	Percent of class: 4.63 - based on 45,112,406 shares outstanding as of Q2
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 2,089,000
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 2,089,000
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Ownership of 5 percent or less of a class
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Tibbs Isaiah

Signature:	Tibbs Isaiah
Name/Title:	Individual
Date:	08/11/2026