Insider filing report for Changes in Beneficial Ownership
- Schedule 13G & 13D forms are used to report a party's ownership of stock which exceeds 5% of a company's total stock issue.
- Schedule 13G is a shorter version of Schedule 13D with fewer reporting requirements.
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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549 |
SCHEDULE 13D
Under the Securities Exchange Act of 1934
(Amendment No. 2)*
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CERo Therapeutics Holdings, Inc. (Name of Issuer) |
Common Stock, $0.0001 par value per share (Title of Class of Securities) |
71902K105 (CUSIP Number) |
Brian G. Atwood 4165 Canyon Road, Lafayette, CA, 94549 (925) 310-4926 (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications) |
03/31/2025 (Date of Event Which Requires Filing of This Statement) |
If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.


The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the
Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other
provisions of the Act (however, see the Notes).
SCHEDULE 13D
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CUSIP No. | 71902K105 |
1 |
Name of reporting person
Atwood-Edminster Trust dtd 4-2-2000 | ||||||||
2 | Check the appropriate box if a member of a Group (See Instructions)
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3 | SEC use only | ||||||||
4 |
Source of funds (See Instructions)
PF | ||||||||
5 |
Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)
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6 | Citizenship or place of organization
UNITED STATES
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Number of Shares Beneficially Owned by Each Reporting Person With: |
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11 | Aggregate amount beneficially owned by each reporting person
490,534.00 | ||||||||
12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)
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13 | Percent of class represented by amount in Row (11)
9.5 % | ||||||||
14 | Type of Reporting Person (See Instructions)
OO |
Comment for Type of Reporting Person:
(1) Percentage ownership is calculated based on 5,189,739 shares, which is the sum of (i) 4,875,263 shares of Common Stock outstanding as of March 31, 2025, based upon records of the Issuer provided to the Reporting Persons, (ii) 294,460 shares issued as of March 31, 2025 to the Reporting Persons and (iii) 20,016 shares of Common Stock issuable upon exercise of options to purchase shares of Common Stock held by the Reporting Persons.
SCHEDULE 13D
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CUSIP No. | 71902K105 |
1 |
Name of reporting person
Brian G. Atwood | ||||||||
2 | Check the appropriate box if a member of a Group (See Instructions)
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3 | SEC use only | ||||||||
4 |
Source of funds (See Instructions)
PF | ||||||||
5 |
Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)
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6 | Citizenship or place of organization
UNITED STATES
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Number of Shares Beneficially Owned by Each Reporting Person With: |
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11 | Aggregate amount beneficially owned by each reporting person
511,800.00 | ||||||||
12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)
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13 | Percent of class represented by amount in Row (11)
9.9 % | ||||||||
14 | Type of Reporting Person (See Instructions)
IN |
Comment for Type of Reporting Person:
(1) Consists of (i) 490,534 shares of Common Stock owned directly by the Atwood-Edminster Trust dtd 4-2-2000, of which Mr. Atwood is a trustee, (ii) 1,250 shares of Common Stock owned directly by Mr. Atwood and (iii) 20,016 shares of Common Stock issuable upon exercise of stock options owned directly by Mr. Atwood. (2) Percentage ownership is calculated based on 5,189,739 shares, which is the sum of (i) 4,875,263 shares of Common Stock outstanding as of March 31, 2025, based upon records of the Issuer provided to the Reporting Persons, (ii) 294,460 shares issued as of March 31, 2025 to the Reporting Persons and (iii) 20,016 shares of Common Stock issuable upon exercise of options to purchase shares of Common Stock held by the Reporting Persons.
SCHEDULE 13D
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CUSIP No. | 71902K105 |
1 |
Name of reporting person
Lynne H. Edminster | ||||||||
2 | Check the appropriate box if a member of a Group (See Instructions)
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3 | SEC use only | ||||||||
4 |
Source of funds (See Instructions)
PF | ||||||||
5 |
Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)
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6 | Citizenship or place of organization
UNITED STATES
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Number of Shares Beneficially Owned by Each Reporting Person With: |
| ||||||||
11 | Aggregate amount beneficially owned by each reporting person
490,534.00 | ||||||||
12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)
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13 | Percent of class represented by amount in Row (11)
9.5 % | ||||||||
14 | Type of Reporting Person (See Instructions)
IN |
Comment for Type of Reporting Person:
(1) Consists of 490,534 shares of Common Stock owned directly by the Atwood-Edminster Trust dtd 4-2-2000, of which Ms. Edminster is a trustee.(2) Percentage ownership is calculated based on 5,189,739 shares, which is the sum of (i) 4,875,263 shares of Common Stock outstanding as of March 31, 2025, based upon records of the Issuer provided to the Reporting Persons, (ii) 294,460 shares issued as of March 31, 2025 to the Reporting Persons and (iii) 20,016 shares of Common Stock issuable upon exercise of options to purchase shares of Common Stock held by the Reporting Persons.
SCHEDULE 13D
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Item 1. | Security and Issuer | |
(a) | Title of Class of Securities:
Common Stock, $0.0001 par value per share | |
(b) | Name of Issuer:
CERo Therapeutics Holdings, Inc. | |
(c) | Address of Issuer's Principal Executive Offices:
201 HASKINS WAY, SUITE 230, SOUTH SAN FRANCISCO,
CALIFORNIA
, 94080. | |
Item 1 Comment:
This Amendment No. 2 ("Amendment No. 2") amends the Schedule 13D originally filed on October 30, 2024, as amended by Amendment No. 1 thereto on February 7, 2025 (the "Statement"), and is filed jointly by Brian G. Atwood, Lynne H. Edminster and the Atwood-Edminster Trust dtd 4-2-2000 (the "Trust" and, together with Mr. Atwood and Ms. Edminster, the "Reporting Persons"), with respect to the Common Stock, par value $0.0001 per share ("Common Stock"), of CERo Therapeutics Holdings, Inc., a Delaware corporation (the "Issuer").. Capitalized terms used herein but not defined shall have the meaning attributed to them in the Schedule 13D. | ||
Item 2. | Identity and Background | |
(a) | N/A | |
(b) | N/A | |
(c) | N/A | |
(d) | N/A | |
(e) | N/A | |
(f) | N/A | |
Item 3. | Source and Amount of Funds or Other Consideration | |
Item 3 is hereby supplemented as follows:On March 28, 2025, Mr. Atwood exercised 294,460 Pre-Funded Warrants and directed the issuance of the shares of Common Stock issuable upon exercise thereof to be delivered to the Trust. As a result of a processing error, the shares of Common Stock were set forth on an account statement as of March 31, 2025 that was not delivered to Mr. Atwood until April 4, 2025. Each of the Pre-Funded Warrants and Warrants contains a beneficial ownership limitation, preventing the exercise thereof if and to the extent that the exercise thereof would result in the holder thereof, together with its affiliates who may be deemed to have beneficial ownership of the securities held thereby, being deemed to have beneficial ownership of greater than 9.99% of the outstanding shares of Common Stock. As a result, such Pre-Funded Warrants and Warrants are not presently exercisable in excess of such limitation and none of the Reporting Persons may be deemed to have beneficial ownership of such shares of Common Stock issuable upon exercise thereof. | ||
Item 4. | Purpose of Transaction | |
Item 4 is hereby supplemented as follows:The information set forth in Item 3 of this Statement, as amended therein, is incorporated herein by reference. | ||
Item 5. | Interest in Securities of the Issuer | |
(a) | See Items 7-11 of the cover pages of this Statement, as amended, and Item 2 of the Statement. | |
(b) | See Items 7-11 of the cover pages of this Statement, as amended, and Item 2 of the Statement. | |
(c) | On March 4, 2025, the Issuer granted stock option awards to each of its non-management directors, including Mr. Atwood. Mr. Atwood received options to purchase an aggregate of 29,871 shares of Common Stock at an exercise price of $1.43, of which 50%, or 14,936 are subject to time-based vesting, with the remainder subject to performance-based vesting conditions. Except for such option awards and the other transactions reported in this Statement, none of the Reporting Persons has effected any transactions in the Issuer's securities within the past 60 days. | |
(d) | No other person is known to the Reporting Persons to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the shares of Common Stock covered by this Statement. | |
(e) | Not applicable. | |
Item 6. | Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer | |
Item 6 is hereby supplemented as follows:The information set forth in Items 3 and 4 of this Statement is incorporated herein by reference. |
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.
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