Kensington Capital VI (KCAC) director reports 9,857,142 founder shares

Rhea-AI Filing Summary

Kensington Capital Acquisition Corp. VI director and officer Justin E. Mirro filed an initial statement of beneficial ownership. The filing reports indirect ownership of 9,857,142 Class B ordinary shares held by Kensington Capital VI LLC, the sponsor entity.

These Class B founder shares automatically convert into Class A ordinary shares on a one-for-one basis at the time of the company’s initial business combination, or earlier at the holder’s option, and have no expiration date. Mirro may be deemed to share beneficial ownership through his role with the sponsor but disclaims ownership beyond any pecuniary interest.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider MIRRO JUSTIN E

Role See Remarks

Type	Security	Shares	Price	Value
holding	Class B Ordinary Shares	--	--	--

Holdings After Transaction: Class B Ordinary Shares — 9,857,142 shares (Indirect, See Footnote)

Footnotes (1)

1. As described in the issuer's registration statement on Form S-1 (File No. 333-293233) under the heading "Description of Securities-Founder Shares", the issuer's Class B ordinary shares, par value $0.0001 per share, will automatically convert into Class A ordinary shares, par value $0.0001 per share, of the issuer at the time of the issuer's initial business combination, or earlier at the option of the holder, on a one-for-one basis, subject to adjustment for share sub-divisions, share capitalizations, reorganizations, recapitalizations and the like, and certain anti-dilution rights and have no expiration date. These shares represent Class B ordinary shares held by Kensington Capital VI LLC (the "Sponsor") that were acquired pursuant to a subscription agreement by and between the Sponsor and the issuer. As the managing member of the managing member of the Sponsor, the reporting person may be deemed to have beneficial ownership of the Class B ordinary shares held directly by the Sponsor and disclaims any beneficial ownership of the reported shares other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

Key Figures

Indirect Class B shares: 9,857,142 shares Conversion ratio: 1:1 Par value: $0.0001 per share +1 more

4 metrics

Indirect Class B shares 9,857,142 shares Class B ordinary shares held by sponsor, indirectly attributed

Conversion ratio 1:1 Class B ordinary shares to Class A ordinary shares at business combination

Par value $0.0001 per share Par value for both Class B and Class A ordinary shares

Exercise price $0.0000 Conversion/exercise price shown for Class B into Class A

Key Terms

Class B Ordinary Shares, initial business combination, anti-dilution rights, beneficial ownership, +1 more

5 terms

Class B Ordinary Shares financial

"These shares represent Class B ordinary shares held by Kensington Capital VI LLC"

Class B ordinary shares are a type of ownership stake in a company that typically come with different voting rights or privileges compared to other share classes. For investors, they represent a way to hold part of the company’s value and influence its decisions, often with fewer voting rights than Class A shares. Understanding these shares helps investors assess their level of control and potential returns within a company.

initial business combination financial

"will automatically convert into Class A ordinary shares at the time of the issuer's initial business combination"

An initial business combination is the deal in which a special-purpose acquisition company (SPAC) merges with or acquires an operating business to bring that business onto public markets. Think of the SPAC as an empty shell that raises money from investors, then uses that cash to buy a private company—this transaction turns the private company into a public one and often changes its ownership, valuation, and access to capital, so investors should watch for shifts in risk, future growth prospects, and shareholder rights.

anti-dilution rights financial

"subject to adjustment for share sub-divisions ... and certain anti-dilution rights"

beneficial ownership financial

"the reporting person may be deemed to have beneficial ownership of the Class B ordinary shares"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

pecuniary interest financial

"disclaims any beneficial ownership of the reported shares other than to the extent of any pecuniary interest"

AI-generated analysis. How Rhea-AI works. Not financial advice.

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FAQ

What does Justin E. Mirro report owning in Kensington Capital Acquisition Corp. VI (KCAC)?

He reports indirect beneficial ownership of 9,857,142 Class B ordinary shares through Kensington Capital VI LLC, the sponsor. These founder shares are separate from public Class A shares and are linked to the company’s future business combination.

How do Kensington Capital VI’s Class B ordinary shares convert into Class A shares?

The Class B ordinary shares will automatically convert one-for-one into Class A ordinary shares at the time of the company’s initial business combination, or earlier at the holder’s option, and are subject to standard anti-dilution adjustments.

Does Justin E. Mirro directly hold the 9,857,142 Class B shares of KCAC?

No. The 9,857,142 Class B shares are held by Kensington Capital VI LLC, the sponsor. Mirro may be deemed to have beneficial ownership through his role with the sponsor but disclaims ownership beyond any pecuniary interest.

What does it mean that KCAC’s Class B shares have no expiration date?

The filing states the Class B ordinary shares have no expiration date. They remain outstanding until automatically converting into Class A shares upon the initial business combination or earlier conversion at the holder’s option, subject to adjustment provisions.

Is this KCAC filing reporting a new insider purchase or sale?

No transaction is reported. This Form 3 filing establishes Justin E. Mirro’s initial beneficial ownership position in sponsor-held Class B shares. It does not disclose any contemporaneous open-market purchases or sales.

SEC Form 3

FORM 3

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

INITIAL STATEMENT OF 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

OMB APPROVAL

OMB Number:			3235-0104
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

MIRRO JUSTIN E

(Last) (First) (Middle)

1400 OLD COUNTRY ROAD, SUITE 301

(Street)

WESTBURY NEW YORK 11590

(City) (State) (Zip)

UNITED STATES

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
03/03/2026

3. Issuer Name and Ticker or Trading Symbol
Kensington Capital Acquisition Corp. VI [ KCAC ]

3a. Foreign Trading Symbol

5. If Amendment, Date of Original Filed (Month/Day/Year)

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	X	10% Owner
X	Officer (give title below)		Other (specify below)
	See Remarks

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Class B Ordinary Shares	(1)	(1)	Class A Ordinary Shares	9,857,142(2)	(1)	I	See Footnote(3)

Explanation of Responses:

1. As described in the issuer's registration statement on Form S-1 (File No. 333-293233) under the heading "Description of Securities-Founder Shares", the issuer's Class B ordinary shares, par value $0.0001 per share, will automatically convert into Class A ordinary shares, par value $0.0001 per share, of the issuer at the time of the issuer's initial business combination, or earlier at the option of the holder, on a one-for-one basis, subject to adjustment for share sub-divisions, share capitalizations, reorganizations, recapitalizations and the like, and certain anti-dilution rights and have no expiration date.

2. These shares represent Class B ordinary shares held by Kensington Capital VI LLC (the "Sponsor") that were acquired pursuant to a subscription agreement by and between the Sponsor and the issuer.

3. As the managing member of the managing member of the Sponsor, the reporting person may be deemed to have beneficial ownership of the Class B ordinary shares held directly by the Sponsor and disclaims any beneficial ownership of the reported shares other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

Remarks:

Exhibit 24 Power of Attorney Chairman and Chief Executive Officer

	/s/ Justin Mirro	07/06/2026
	** Signature of Reporting Person	Date
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 5 (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.
* Form 3: SEC 1473 (03-26)