Amendment to Statement of Changes in Beneficial Ownership (Form 4/A)

FORM 4 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 that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN 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

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(Print or Type Responses)

1. Name and Address of Reporting Person * Cam-Phung Michael Tam 2. Issuer Name and Ticker or Trading Symbol Cambridge Acquisition Corp. [CAQ] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O CAMBRIDGE ACQUISITION CORP, ONE LIBERTY SQUARE, 13TH FL 3. Date of Earliest Transaction (Month/Day/Year) 02/09/2026 (Street) BOSTON, MA 02109 4. If Amendment, Date Original Filed (Month/Day/Year) 02/10/2026 6. Individual or Joint/Group Filing (Check Applicable Line) ___ Form filed by One Reporting Person _X_ Form filed by More than One Reporting Person (City) (State) (Zip) 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 Class A Ordinary Shares 02/09/2026 02/09/2026 P 495,500(1) A $10 495,500(1) I(3) See footnote(2)

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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 Underlying Securities (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 of Derivative Security: 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

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Cam-Phung Michael Tam C/O CAMBRIDGE ACQUISITION CORP ONE LIBERTY SQUARE, 13TH FL BOSTON, MA 02109	X	X
Cambridge Sponsor LLC ONE LIBERTY SQUARE, 13TH FL BOSTON, MA 02109		X

Signatures

/s/ Cambridge Sponsor LLC		03/05/2026
**Signature of Reporting Person		Date
/s/ Michael Cam- Phung		03/05/2026
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	Reflects the 495,500 Class A ordinary shares of Cambridge Acquisition Corp. (the "Issuer") that are included in the 495,500 private placement units of the Issuer purchased by Cambridge Sponsor LLC ("Sponsor"). Each private placement unit was purchased for $10 per unit and consists of one Class A ordinary share and one-third of a warrant, each whole warrant exercisable into one Class A ordinary share at an exercise price of $11.50 per ordinary share.
(2)	The Sponsor is the record holder of such shares. Michael Cam- Phung, as the managing member of the Sponsor, holds voting and investment discretion with respect to the ordinary shares held of record by the Sponsor. As such, Mr. Cam- Phung may be deemed to have beneficial ownership of the securities held of record by the Sponsor. Mr. Cam- Phung disclaims any beneficial ownership of the securities held by the Sponsor other than to the extent of any pecuniary interest he may have therein, directly or indirectly.
(3)	Excludes 7,666,667 Class B ordinary shares of the Issuer held by the Sponsor acquired pursuant to a subscription agreement by and between the Issuer and the Sponsor.
Remarks: This Form 4/A amends the Form 4 filing dated February 10, 2026 (the "Original Form 4") solely to add Cambridge Sponsor LLC (the "Sponsor") as an additional Reporting Person. Although Sponsor was disclosed in the Original Form 4, it was not included as a Reporting Person because it did not have codes for the EDGAR system at such time. Other than including the Sponsor as additional reporting persons, this form contains no amendment to the Original Form 4.

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