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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549 |
SCHEDULE 13G
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UNDER THE SECURITIES EXCHANGE ACT OF 1934
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(Amendment No. 1)*
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Camp4 Therapeutics Corp (Name of Issuer) |
Common Stock, par value $0.0001 per share (Title of Class of Securities) |
13463J101 (CUSIP Number) |
12/31/2025 (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)
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 Rule 13d-1(c)
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| Rule 13d-1(d)
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SCHEDULE 13G
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| CUSIP No. | 13463J101 |
| 1 | Names of Reporting Persons
Vivo Opportunity Fund Holdings, L.P. | ||||||||
| 2 | Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
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| 3 | Sec Use Only | ||||||||
| 4 | Citizenship or Place of Organization
DELAWARE
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| Number of Shares Beneficially Owned by Each Reporting Person With: |
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| 9 | Aggregate Amount Beneficially Owned by Each Reporting Person
3,856,991.00 | ||||||||
| 10 | Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
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| 11 | Percent of class represented by amount in row (9)
7.4 % | ||||||||
| 12 | Type of Reporting Person (See Instructions)
PN |
Comment for Type of Reporting Person: The number represents shares of common stock, $0.0001 par value (the "Common Stock") of CAMP4 Therapeutics Corporation (the "Issuer") held of record by Vivo Opportunity Fund Holdings, L.P. Vivo Opportunity, LLC is the general partner of Vivo Opportunity Fund Holdings, L.P.
The percentage is based on 51,880,185 shares of Common Stock of the Issuer outstanding as of December 18, 2025, as disclosed in the prospectus supplement filed by the Issuer on December 18, 2025 with the Securities and Exchange Commission ("SEC") pursuant to Rule 424(b)(5), which forms part of the Issuer's Registration Statement on Form S-3 (File No. 333-291432).
SCHEDULE 13G
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| CUSIP No. | 13463J101 |
| 1 | Names of Reporting Persons
Vivo Opportunity, LLC | ||||||||
| 2 | Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
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| 3 | Sec Use Only | ||||||||
| 4 | Citizenship or Place of Organization
DELAWARE
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| Number of Shares Beneficially Owned by Each Reporting Person With: |
| ||||||||
| 9 | Aggregate Amount Beneficially Owned by Each Reporting Person
3,856,991.00 | ||||||||
| 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)
7.4 % | ||||||||
| 12 | Type of Reporting Person (See Instructions)
OO |
Comment for Type of Reporting Person: The number represents shares of Common Stock of the Issuer held of record by Vivo Opportunity Fund Holdings, L.P. Vivo Opportunity, LLC is the general partner of Vivo Opportunity Fund Holdings, L.P.
The percentage is based on 51,880,185 shares of Common Stock of the Issuer outstanding as of December 18, 2025, as disclosed in the prospectus supplement filed by the Issuer on December 18, 2025 with the SEC pursuant to Rule 424(b)(5), which forms part of the Issuer's Registration Statement on Form S-3 (File No. 333-291432).
SCHEDULE 13G
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| CUSIP No. | 13463J101 |
| 1 | Names of Reporting Persons
Vivo Opportunity Cayman Fund, L.P. | ||||||||
| 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
CAYMAN ISLANDS
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| Number of Shares Beneficially Owned by Each Reporting Person With: |
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| 9 | Aggregate Amount Beneficially Owned by Each Reporting Person
389,577.00 | ||||||||
| 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)
0.8 % | ||||||||
| 12 | Type of Reporting Person (See Instructions)
PN |
Comment for Type of Reporting Person: The number represents shares of Common Stock of the Issuer held of record by Vivo Opportunity Cayman Fund, L.P. Vivo Opportunity Cayman, LLC is the general partner of Vivo Opportunity Cayman Fund, L.P.
The percentage is based on 51,880,185 shares of Common Stock of the Issuer outstanding as of December 18, 2025, as disclosed in the prospectus supplement filed by the Issuer on December 18, 2025 with the SEC pursuant to Rule 424(b)(5), which forms part of the Issuer's Registration Statement on Form S-3 (File No. 333-291432).
SCHEDULE 13G
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| CUSIP No. | 13463J101 |
| 1 | Names of Reporting Persons
Vivo Opportunity Cayman, LLC | ||||||||
| 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
CAYMAN ISLANDS
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| Number of Shares Beneficially Owned by Each Reporting Person With: |
| ||||||||
| 9 | Aggregate Amount Beneficially Owned by Each Reporting Person
389,577.00 | ||||||||
| 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)
0.8 % | ||||||||
| 12 | Type of Reporting Person (See Instructions)
OO |
Comment for Type of Reporting Person: The number represents shares of Common Stock of the Issuer held of record by Vivo Opportunity Cayman Fund, L.P. Vivo Opportunity Cayman, LLC is the general partner of Vivo Opportunity Cayman Fund, L.P.
The percentage is based on 51,880,185 shares of Common Stock of the Issuer outstanding as of December 18, 2025, as disclosed in the prospectus supplement filed by the Issuer on December 18, 2025 with the SEC pursuant to Rule 424(b)(5), which forms part of the Issuer's Registration Statement on Form S-3 (File No. 333-291432).
SCHEDULE 13G
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| Item 1. | ||
| (a) | Name of issuer:
Camp4 Therapeutics Corp | |
| (b) | Address of issuer's principal executive offices:
One Kendall Square Building 1400 West, 3rd Floor Cambridge, MA 02139 | |
| Item 2. | ||
| (a) | Name of person filing:
Vivo Opportunity Fund Holdings, L.P. and its General Partner Vivo Opportunity, LLC
Vivo Opportunity Cayman Fund, L.P. and its General Partner Vivo Opportunity Cayman, LLC | |
| (b) | Address or principal business office or, if none, residence:
192 Lytton Avenue, Palo Alto, CA 94301 | |
| (c) | Citizenship:
Vivo Opportunity Fund Holdings, L.P. is a Delaware limited partnership.
Vivo Opportunity, LLC is a Delaware limited liability company.
Vivo Opportunity Cayman Fund, L.P. is a Cayman Islands limited partnership.
Vivo Opportunity Cayman, LLC is a Cayman Islands limited liability company. | |
| (d) | Title of class of securities:
Common Stock, par value $0.0001 per share | |
| (e) | CUSIP No.:
13463J101 | |
| 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);
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| (b) | Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
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| (c) | Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
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| (d) | Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
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| (e) | An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
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| (f) | An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
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| (g) | A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
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| (h) | A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
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| (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);
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| (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).
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| Item 4. | Ownership | |
| (a) | Amount beneficially owned:
Vivo Opportunity, LLC beneficially owns 3,856,991 shares of Common Stock. The securities are held of record by Vivo Opportunity Fund Holdings, L.P. Vivo Opportunity, LLC is the general partner of Vivo Opportunity Fund Holdings, L.P.
Vivo Opportunity Cayman, LLC beneficially owns 389,577 shares of Common Stock. The securities are held of record by Vivo Opportunity Cayman Fund, L.P. Vivo Opportunity Cayman, LLC is the general partner of Vivo Opportunity Cayman Fund, L.P. | |
| (b) | Percent of class:
Vivo Opportunity Fund Holdings, L.P.: 7.4%
Vivo Opportunity, LLC: 7.4%
Vivo Opportunity Cayman Fund, L.P.: 0.8%
Vivo Opportunity Cayman, LLC.: 0.8% %
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| (c) | Number of shares as to which the person has:
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| (i) Sole power to vote or to direct the vote:
Vivo Opportunity Fund Holdings, L.P.: 3,856,991 shares
Vivo Opportunity, LLC: 3,856,991 shares
Vivo Opportunity Cayman Fund, L.P.: 389,577 shares
Vivo Opportunity Cayman, LLC: 389,577 shares | ||
| (ii) Shared power to vote or to direct the vote:
0 | ||
| (iii) Sole power to dispose or to direct the disposition of:
Vivo Opportunity Fund Holdings, L.P.: 3,856,991 shares
Vivo Opportunity, LLC: 3,856,991 shares
Vivo Opportunity Cayman Fund, L.P.: 389,577 shares
Vivo Opportunity Cayman, LLC: 389,577 shares | ||
| (iv) Shared power to dispose or to direct the disposition of:
0 | ||
| Item 5. | Ownership of 5 Percent or Less of a Class. | |
| Item 6. | Ownership of more than 5 Percent on Behalf of Another Person. | |
Not Applicable
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| 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
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| Item 8. | Identification and Classification of Members of the Group. | |
Not Applicable
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| Item 9. | Notice of Dissolution of Group. | |
Not Applicable
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| 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.
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