# EDGAR Filing Document

**Accession Number:** 0002085776
**File Stem:** 0001104659-26-012767
**Filing Date:** 2026-2
**Character Count:** 6806
**Document Hash:** 4710e53debd13d42642c03f5e6ce8afc
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-26-012767.hdr.sgml**: 20260210

**ACCESSION NUMBER**: 0001104659-26-012767

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260209

**FILED AS OF DATE**: 20260210

**DATE AS OF CHANGE**: 20260210

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Cam-Phung Michael Tam
- **CENTRAL INDEX KEY:** 0002085776

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-43106
- **FILM NUMBER:** 26617469

**MAIL ADDRESS:**
- **STREET 1:** 123 HUNTINGTON RD
- **CITY:** BRIGHTON
- **STATE:** MA
- **ZIP:** 02135
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Cambridge Acquisition Corp.
- **CENTRAL INDEX KEY:** 0002100125
- **STANDARD INDUSTRIAL CLASSIFICATION:** BLANK CHECKS [6770]
- **ORGANIZATION NAME:** 05 Real Estate & Construction
- **EIN:** 000000000
- **STATE OF INCORPORATION:** E9
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** ONE LIBERTY SQUARE, 13TH FL
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02109
- **BUSINESS PHONE:** (617) 396-4911

**MAIL ADDRESS:**
- **STREET 1:** ONE LIBERTY SQUARE, 13TH FL
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02109

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

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] 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 for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

---

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

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Class A Ordinary Shares | 2026-02-09 | 2026-02-09 | P |  | 495500<sup>(1)</sup> | A | $10 | 495500<sup>(1)</sup> | I<sup>(3)</sup> | See footnote<sup>(2)</sup> |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

---

### Footnotes:

(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.

**Signature:** /s/ Cambridge Sponsor LLC  
**Date:** 2026-02-10

**Signature:** /s/ Michael Cam- Phung  
**Date:** 2026-02-10

### Remarks:

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 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).

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.**