Meridian3 (MIACU) sponsor discloses 4.83M Class B founder shares

Rhea-AI Filing Summary

Meridian3 Partners Sponsor LLC filed an initial ownership report showing it holds 4,831,250 Class B ordinary shares of Meridian3 Industrials Acquisition Corp. These Class B shares will automatically convert into Class A ordinary shares at the time of the company’s initial business combination, or earlier at the holder’s option, on a one-for-one basis, subject to adjustment described in the company’s registration statement.

The footnote explains that this balance reflects 5,031,250 founder shares initially acquired by the reporting person, reduced by 200,000 founder shares transferred before the Form 3 reporting date. The Class B ordinary shares have no expiration date.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Meridian3 Partners Sponsor LLC

Role null

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

Holdings After Transaction: Class B Ordinary Shares — 4,831,250 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

Class B shares held: 4,831,250 shares Underlying Class A shares: 4,831,250 shares Founder shares initially acquired: 5,031,250 shares +3 more

6 metrics

Class B shares held 4,831,250 shares Class B ordinary shares held following Form 3 event

Underlying Class A shares 4,831,250 shares Class A ordinary shares issuable upon conversion of Class B

Founder shares initially acquired 5,031,250 shares Founder shares initially acquired by the reporting person

Founder shares transferred 200,000 shares Founder shares transferred prior to the Form 3 event date

Conversion ratio 1-for-1 Class B ordinary shares convert into Class A ordinary shares

Exercise price $0.0000 per share Conversion/exercise price indicated for Class B into Class A

Key Terms

Class B Ordinary Shares, Class A Ordinary Shares, founder shares, initial business combination, +1 more

5 terms

Class B Ordinary Shares financial

"The Class B ordinary shares reported herein will automatically convert into Class A ordinary shares"

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.

Class A Ordinary Shares financial

"will automatically convert into Class A ordinary shares at the time of the Meridian3 Industrials Acquisition Corp's initial business combination"

Class A ordinary shares are a type of ownership stake in a company that typically grants voting rights to shareholders, allowing them to have a say in important company decisions. They often come with priority in receiving dividends or profits, making them attractive to investors seeking influence and potential income. These shares help distinguish different levels of ownership and rights within a company's stock structure.

founder shares financial

"The number of shares reflects 5,031,250 founder shares initially acquired by the Reporting Person, less 200,000 founder shares transferred"

Founder shares are the ownership stakes given to the people who start a company, often with extra voting power or protections compared with ordinary shares. For investors, they matter because founders’ control and incentives influence decisions about strategy, hiring, and whether the company sells or stays independent — like a family that keeps majority voting rights in a household decision. High founder ownership can mean stable leadership but also a risk that outside shareholders have less influence.

initial business combination financial

"will automatically convert into Class A ordinary shares at the time of the Meridian3 Industrials Acquisition Corp'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.

registration statement regulatory

"on a one-for-one basis, subject to adjustment as described in the Issuer's registration statement"

A registration statement is a formal document that companies file with a government agency to offer new shares of stock to the public. It provides essential information about the company's finances, operations, and risks, helping investors make informed decisions. Think of it as a detailed product description that ensures transparency and trust before buying into a company.

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Understanding Insider Trading Forms →

Available on EDGAR 07/04/2026 - 12:13 PM Accepted by SEC EDGAR 07/01/2026 - 02:07 PM Learn about SEC filing dates

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
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hours per response:			0.5

1. Name and Address of Reporting Person^*

Meridian3 Partners Sponsor LLC

(Last) (First) (Middle)

1330 AVENUE OF THE AMERICAS, SUITE 23A

(Street)

NEW YORK NEW YORK 10019

(City) (State) (Zip)

UNITED STATES

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
07/01/2026

3. Issuer Name and Ticker or Trading Symbol
Meridian3 Industrials Acquisition Corp [ MIAC ]

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)

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

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)	(1)	Class A Ordinary Shares(1)	4,831,250	$0.00	D

Explanation of Responses:

1. The Class B ordinary shares reported herein will automatically convert into Class A ordinary shares at the time of the Meridian3 Industrials Acquisition Corp's ("Issuer") initial business combination, or earlier at the option of the holder, on a one-for-one basis, subject to adjustment as described in the Issuer's registration statement. The Class B ordinary shares have no expiration date. The number of shares reflects 5,031,250 founder shares initially acquired by the Reporting Person, less 200,000 founder shares transferred prior to the Form 3 event date.

	/s/ David Bulley	07/01/2026
	** 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)

FAQ

What does Meridian3 Partners Sponsor LLC report in the MIACU Form 3 filing?

Meridian3 Partners Sponsor LLC reports holding 4,831,250 Class B ordinary shares. These holdings represent founder shares in Meridian3 Industrials Acquisition Corp and establish the sponsor’s initial ownership position before any business combination or conversion into Class A ordinary shares.

How many Meridian3 founder shares did the sponsor initially acquire?

The sponsor initially acquired 5,031,250 founder shares. According to the footnote, this initial amount was reduced by transferring 200,000 founder shares prior to the Form 3 event date, resulting in 4,831,250 Class B ordinary shares reported as currently held.

How will Meridian3’s Class B ordinary shares held by the sponsor convert?

The Class B ordinary shares will convert into Class A ordinary shares on a one-for-one basis. Conversion occurs automatically at Meridian3 Industrials Acquisition Corp’s initial business combination, or earlier at the option of the holder, subject to adjustment in the registration statement.

Do Meridian3’s Class B ordinary shares held by the sponsor have an expiration date?

The Class B ordinary shares reported have no expiration date. The footnote explicitly states that these Class B ordinary shares do not expire, while still being subject to automatic or optional conversion into Class A ordinary shares in connection with the business combination.

What change explains the 4,831,250 Class B shares reported in the Meridian3 Form 3?

The reported 4,831,250 shares reflect a transfer of 200,000 founder shares. The sponsor initially acquired 5,031,250 founder shares, then transferred 200,000 before the Form 3 date, leaving 4,831,250 Class B ordinary shares reported as beneficially owned.