Vault-13

CAMBRIDGE ACQUISITION CORP CAQ

USD CL A ORD SHS · Common Stock · CUSIP G1871M108

45 institutional holders +35 vs Q1 2026
17,873,09517.9m shares reported held*
$177.2mreported value*
35 new 2 added 1 reduced 0 sold out net bought ≈ $138.3m (+14.0m shares)

* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once. Holder counts are more reliable. Implied quarter-end price ≈ $9.91.

Trends to Q2 2026

Institutional holders

Managers reporting a position, each quarter

0204060Q1 26: 10Q2 26: 4545Q1 26Q2 26
Numbers
QuarterHolders
Q1 202610
Q2 202645

Biggest buyers

ADAGE CAPITAL PARTNERS GP, L.L.C. New +1,800,000+1.8m
Magnetar Financial LLC New +1,699,995+1.7m
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND New +1,099,998+1.1m
BNP PARIBAS FINANCIAL MARKETS New +974,769+974.8k
SONA ASSET MANAGEMENT (US) LLC New +950,000+950.0k
AQR Arbitrage LLC New +739,805+739.8k
GLAZER CAPITAL, LLC New +685,937+685.9k
Kryger Capital LLC New +637,189+637.2k
MOORE CAPITAL MANAGEMENT, LP New +600,000+600.0k
RIVERNORTH CAPITAL MANAGEMENT, LLC New +520,905+520.9k

Biggest sellers

Clear Street Group Inc. Reduced -2,818-2.8k

Major shareholders (over 5%)

Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.

HolderStakeChangeShares Last filed
Cam-Phung Michael Tam 13D · may seek influence new · filed 2026-02-13
Stated purposeIn connection with the organization of the Issuer, on October 30, 2025, 7,666,667 Class B Ordinary Shares (the "Founder Shares") were purchased by the Sponsor for the amount of $25,000, pursuant to a Securities Subscription Agreement, dated as of October 30, 2025, by and between the Sponsor and the Issuer (the "Subscription Agreement"), as more fully described in Item 6 of this Schedule 13D which information is incorporated herein by reference. On February 9, 2026, simultaneously with the consummation of the Issuer's Initial Public Offering (the "IPO"), the Sponsor purchased 495,500 units ("Placement Units") of the Issuer at $10.00 per Placement Unit, pursuant to a Private Placement Units Purchase Agreement, dated as of February 5, 2026, by and between the Issuer and the Sponsor (the "Plac… Full filing
 29.2% new 8.2m≈ $80.9m 2026-02-13
Adage Capital Management, L.P. 13G · institution new · filed 2026-05-13 7.7% new 1.8m≈ $17.8m 2026-05-13
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND 13G · institution new · filed 2026-08-13 6.3% new 1.1m≈ $10.9m 2026-08-13

Insider purchases and sales since 1 Apr 2026

Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.

Officers and directors buying vs selling

Number of people, by quarter (10% owners not included)

BuyingSelling
101Q4 24: 0 buyingQ4 24: 0 sellingQ1 25: 0 buyingQ1 25: 0 sellingQ1 25Q2 25: 0 buyingQ2 25: 0 sellingQ3 25: 0 buyingQ3 25: 0 sellingQ3 25Q4 25: 0 buyingQ4 25: 0 sellingQ1 26: 1 buyingQ1 26: 0 sellingQ1 26Q2 26: 0 buyingQ2 26: 0 sellingQ3 26: 0 buyingQ3 26: 0 sellingQ3 26
Numbers
QuarterBuyingBoughtSellingSoldSold under a plan
Q4 20240—0——
Q1 20250—0——
Q2 20250—0——
Q3 20250—0——
Q4 20250—0——
Q1 20261$5.0m0——
Q2 20260—0——
Q3 20260—0——

None reported since 1 Apr 2026.

Holders, Q2 2026

#ManagerLocationShares Value% of their portfolioChangeShares change
1 ADAGE CAPITAL PARTNERS GP, L.L.C. 0.03% of their portfolio Boston, MA 1,800,0001.8m $17.8m $17.8m 0.03% New
2 Magnetar Financial LLC 0.15% of their portfolio EVANSTON, IL 1,699,9951.7m $16.9m $16.9m 0.15% New
3 HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND 0.02% of their portfolio TORONTO, A6 1,099,9981.1m $10.9m $10.9m 0.02% New
4 TENOR CAPITAL MANAGEMENT Co., L.P. 0.14% of their portfolio NEW YORK, NY 1,000,0001.0m $9.9m $9.9m 0.14% Unchanged
5 BNP PARIBAS FINANCIAL MARKETS 0.01% of their portfolio PARIS, I0 974,769974.8k $9.7m $9.7m 0.01% New
6 SONA ASSET MANAGEMENT (US) LLC 0.35% of their portfolio NEW YORK, NY 950,000950.0k $9.4m $9.4m 0.35% New
7 Hudson Bay Capital Management LP 0.04% of their portfolio STAMFORD, CT 799,998800.0k $7.9m $7.9m 0.04% Unchanged
8 AQR Arbitrage LLC 0.10% of their portfolio Greenwich, CT 739,805739.8k $7.3m $7.3m 0.10% New
9 GLAZER CAPITAL, LLC 0.17% of their portfolio New York, NY 685,937685.9k $6.8m $6.8m 0.17% New
10 Kryger Capital LLC 0.36% of their portfolio HAMILTON, D0 637,189637.2k $6.3m $6.3m 0.36% New
11 MOORE CAPITAL MANAGEMENT, LP 0.14% of their portfolio NEW YORK, NY 600,000600.0k $5.9m $5.9m 0.14% New
12 Radcliffe Capital Management, L.P. 0.41% of their portfolio BALA CYNWYD, PA 550,000550.0k $5.5m $5.5m 0.41% Unchanged
13 RIVERNORTH CAPITAL MANAGEMENT, LLC 0.25% of their portfolio WEST PALM BEACH, FL 520,905520.9k $5.2m $5.2m 0.25% New
14 MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio NEW YORK, NY 500,000500.0k $5.0m $5.0m 0.00% New
15 MMCAP International Inc. SPC 0.42% of their portfolio GRAND CAYMAN, E9 500,000500.0k $5.0m $5.0m 0.42% New
16 BERKLEY W R CORP 0.21% of their portfolio Greenwich, CT 424,998425.0k $4.2m $4.2m 0.21% Unchanged
17 WHITEBOX ADVISORS LLC 0.06% of their portfolio MINNEAPOLIS, MN 400,000400.0k $4.0m $4.0m 0.06% New
18 TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio NEW YORK, NY 362,500362.5k $3.6m $3.6m 0.00% Unchanged
19 Linden Advisors LP 0.02% of their portfolio New York, NY 350,000350.0k $3.5m $3.5m 0.02% New
20 Periscope Capital Inc. 0.55% of their portfolio Toronto, A6 349,500349.5k $3.5m $3.5m 0.55% New
21 First Trust Capital Management L.P. 0.17% of their portfolio CHICAGO, IL 300,000300.0k $3.0m $3.0m 0.17% Unchanged
22 Centiva Capital, LP 0.09% of their portfolio New York, NY 275,000275.0k $2.7m $2.7m 0.09% New
23 Ghisallo Capital Management LLC 0.05% of their portfolio BOSTON, MA 250,000250.0k $2.5m $2.5m 0.05% New
24 Clear Street Group Inc. 0.01% of their portfolio NEW YORK, NY 205,465205.5k $2.0m $2.0m 0.01% Reduced -2.8k -2,818
25 Polar Asset Management Partners Inc. 0.04% of their portfolio TORONTO, A6 200,000200.0k $2.0m $2.0m 0.04% New
26 PICTON MAHONEY ASSET MANAGEMENT 0.02% of their portfolio Toronto, A6 199,995200.0k $2.0m $2.0m 0.02% New
27 L1 Global Manager Pty Ltd 1.41% of their portfolio Melbourne, C3 175,000175.0k $1.7m $1.7m 1.41% New
28 Schonfeld Strategic Advisors LLC 0.01% of their portfolio NEW YORK, NY 167,002167.0k $1.7m $1.7m 0.01% New
29 Verition Fund Management LLC 0.01% of their portfolio GREENWICH, CT 137,500137.5k $1.4m $1.4m 0.01% Unchanged
30 Virtu Financial LLC 0.04% of their portfolio New York, NY 134,489134.5k $1.3m $1.3m 0.04% Added +16 +16
31 Mint Tower Capital Management B.V. 0.15% of their portfolio AMSTERDAM, P7 125,000125.0k $1.2m $1.2m 0.15% New
32 WOLVERINE ASSET MANAGEMENT LLC 0.01% of their portfolio CHICAGO, IL 106,760106.8k $1.1m $1.1m 0.01% New
33 Cable Car Capital, LP 0.04% of their portfolio SAN FRANCISCO, CA 100,002100.0k $991.0k $991.0k 0.04% New
34 DLD Asset Management, LP 0.08% of their portfolio NEW YORK, NY 100,000100.0k $991.0k $991.0k 0.08% New
35 GRITSTONE ASSET MANAGEMENT LLC 0.95% of their portfolio Bethesda, MD 100,000100.0k $991.0k $991.0k 0.95% New
36 Kepos Capital LP 1.15% of their portfolio NEW YORK, NY 84,99985.0k $842.0k $842.0k 1.15% New
37 DELTEC ASSET MANAGEMENT LLC 0.09% of their portfolio New York, NY 60,00060.0k $594.6k $594.6k 0.09% New
38 HEIGHTS CAPITAL MANAGEMENT, INC 0.13% of their portfolio SAN FRANCISCO, CA 55,00055.0k $545.6k $545.6k 0.13% New
39 ABC ARBITRAGE SA 0.04% of their portfolio PARIS, I0 40,00040.0k $396.4k $396.4k 0.04% New
40 Limestone Investment Advisors LP 0.20% of their portfolio NEW YORK, NY 39,43039.4k $390.8k $390.8k 0.20% New
41 K2 PRINCIPAL FUND, L.P. 0.03% of their portfolio TORONTO, A6 30,78730.8k $305.1k $305.1k 0.03% New
42 Logan Stone Capital, LLC 0.05% of their portfolio CHICAGO, IL 26,18026.2k $259.4k $259.4k 0.05% New
43 PenderFund Capital Management Ltd. 0.02% of their portfolio VANCOUVER, A1 13,40013.4k $132.9k $132.9k 0.02% New
44 ROYAL BANK OF CANADA 0.00% of their portfolio TORONTO, A6 1,4501.4k $14.0k $14.0k 0.00% New
45 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 4242 $416 $416 0.00% Added +31 +31