Comparable stake leader
Cam-Phung Michael Tam
SEC ownership of Cambridge Acquisition Corp.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0002100125.
Disclosed value leader
ADAGE CAPITAL PARTNERS GP, L.L.C.
Comparable rows
29/50
Latest evidence
30 Jun 2026
- Public ticker
- CAQ, CAQUU, CAQUW on Nasdaq
- Parsed ownership sources
-
3/4/5, 13D/G, and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Cam-Phung Michael Tam
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
29 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
Cam-Phung Michael Tam
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
30 Jun 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0002100125
- Issuer location
- Boston, MA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of Cambridge Acquisition Corp. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Cam-Phung Michael Tam
Disclosed value leader
ADAGE CAPITAL PARTNERS GP...
Comparable rows
29/50
Latest evidence
30 Jun 2026
3/4/5
13D/G
13F
Lead comparable stake: 29%
21 rows are not safely comparable across share classes.
13D/G row: Cam-Phung Michael Tam
Showing 1-8 of 50 holder rows.
Quick read
Cam-Phung Michael Tam leads the comparable SEC ownership view at 29%.
29 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Cam-Phung Michael Tam's linked filing trail.
Comparable ownership
Top 5
Cam-Phung Michael Tam
29%
Adage Capital Management, L.P.
7.7%
Magnetar Financial LLC
7.2%
HEALTHCARE OF ONTARIO PENSION PLA...
6.3%
TENOR CAPITAL MANAGEMENT Co., L.P.
4.3%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Cam-Phung Michael Tam |
3/4/5
13D/G
Director, 10%+ Owner
|
29%
from 13D/G
|
$4,955,000
495,500 shares
|
+$4,955,000 | 09 Feb 2026 |
| Adage Capital Management, L.P. |
13D/G
|
7.7%
|
$17,730,000
1,800,000 shares
|
$0 | 31 Mar 2026 |
| Magnetar Financial LLC |
13F
13D/G
Company
|
7.2%
from 13D/G
|
$17,033,950
2,266,660 shares
mixed-class rows
|
— | 30 Jun 2026 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND |
13F
13D/G
Company
|
6.3%
from 13D/G
|
$11,022,000
1,466,666 shares
mixed-class rows
|
— | 30 Jun 2026 |
| TENOR CAPITAL MANAGEMENT Co., L.P. |
13F
13D/G
Company · Tenor Capital Management Company, L.P.
|
4.3%
from 13D/G
|
$10,010,000
1,333,333 shares
mixed-class rows
|
— | 30 Jun 2026 |
| ARISTEIA CAPITAL, L.L.C. |
13F
Company
|
3.5%
|
$8,164,318
811,627 shares
|
— | 30 Jun 2026 |
| LMR Partners LLP |
13F
Company
|
3.2%
|
$7,544,400
750,000 shares
|
— | 30 Jun 2026 |
| OMERS ADMINISTRATION Corp |
13F
Company
|
3%
|
$7,041,430
699,999 shares
|
— | 30 Jun 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to buying over the last 12 months. Net value: +$4,955,000.
Buys
$4,955,000
Insiders: 1
Sells
$0
Insiders: 0
Net
+$4,955,000
Shares: +495,500
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 495,500
Shares: 0
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 495,500 | 0 | $4,955,000 | $0 | +$4,955,000 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-6 of 6 reporting-owner rows connected to Cambridge Acquisition Corp.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
6
Largest Forms 3/4/5 holder
Cam-Phung Michael Tam
Net 12M change
+$4,955,000
Latest report
09 Feb 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Cam-Phung Michael Tam | Director, 10%+ Owner | $4,955,000 | +$4,955,000 | +100% | Filing P/S | 09 Feb 2026 |
| Brent Cox | Chief Executive Officer, Director | Mixed | 30 Jan 2026 | |||
| Anthony Michael Naimo | Chief Financial Officer | Mixed | 30 Jan 2026 | |||
| Christopher Bradley | Director | Mixed | 06 Feb 2026 | |||
| Vanessa Rollings Giannis | Director | Mixed | 06 Feb 2026 | |||
| Eric Sklar | Director | Mixed | 06 Feb 2026 |
Recent insider transactions for Cambridge Acquisition Corp.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Tam Cam Phung | CAQ | Class A Ordinary Shares | Purchase | $4,955,000 | $10.00 | 495,500 | 495,500 | 09 Feb 2026 | See footnote |
* marks a reported price that did not pass the local price check.