RACC director reports 39,130 Class B shares

Research Alliance Corp III director Michael F. MacLean filed an initial ownership report showing a direct holding of 39,130 Class B Ordinary Shares.

Rhea-AI Filing Summary

Research Alliance Corp III director Michael F. MacLean filed an initial ownership report showing a direct holding of 39,130 Class B Ordinary Shares. According to the filing, these Class B shares have no expiration date and will 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, subject to customary anti-dilution adjustments.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider MacLean Michael F

Role Director

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

Holdings After Transaction: Class B Ordinary Shares — 39,130 contracts (Direct)

Footnotes (1)

1. F1. Class B Ordinary Shares have no expiration date and will automatically convert into Class A Ordinary Shares of the Issuer at the time of the Issuer's initial business combination on a one-for-one basis (subject to adjustment for sub-divisions, share dividends, reorganizations, recapitalizations and the like), or at any time prior thereto at the option of the holder on a one-for-one basis, subject to adjustment pursuant to certain anti-dilution rights.

Key Figures

Class B shares held: 39,130 shares Conversion ratio: 1-for-1 into Class A Exercise price: $0.00 per share

3 metrics

Class B shares held 39,130 shares Directly owned by Michael F. MacLean as reported on Form 3

Conversion ratio 1-for-1 into Class A Class B Ordinary Shares convert into Class A Ordinary Shares

Exercise price $0.00 per share Conversion price field shown as 0.0000 in derivative data

Key Terms

Class B Ordinary Shares, Class A Ordinary Shares, initial business combination, anti-dilution rights

4 terms

Class B Ordinary Shares financial

"Class B Ordinary Shares have no expiration date and will automatically convert"

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

"convert into Class A Ordinary Shares of the Issuer at the time"

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.

initial business combination financial

"at the time of the Issuer's initial business combination on a one-for-one basis"

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 pursuant to certain anti-dilution rights"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does Michael F. MacLean report owning in Research Alliance Corp III (RACC)?

Michael F. MacLean reports direct ownership of 39,130 Class B Ordinary Shares of Research Alliance Corp III. These shares are reported on a Form 3, which is an initial statement of beneficial ownership for company insiders.

How do MacLean’s Class B shares in RACC convert into Class A shares?

MacLean’s Class B Ordinary Shares convert into Class A Ordinary Shares on a one-for-one basis. Conversion occurs automatically at the time of the company’s initial business combination, or earlier at the holder’s option, subject to adjustment for anti-dilution provisions.

Do the Class B Ordinary Shares reported by MacLean in RACC have an expiration date?

The filing states that the Class B Ordinary Shares have no expiration date. They remain outstanding until they automatically convert into Class A Ordinary Shares at the initial business combination, or if converted earlier at the holder’s option under the same one-for-one terms.

What is the relationship between the Class B and Class A shares in RACC?

Each Class B Ordinary Share is convertible into one Class A Ordinary Share. The conversion is one-for-one, subject to adjustment for sub-divisions, share dividends, reorganizations, recapitalizations and similar events, as described in the filing’s footnote.

Is MacLean’s ownership in RACC direct or indirect?

The Form 3 indicates direct ownership of the 39,130 Class B Ordinary Shares by Michael F. MacLean. The ownership code is "D" for direct, and no additional entity or indirect holding structure is referenced in the provided data.

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

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Accepted by SEC EDGAR 05/19/2026 - 04:08 PM EDT 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
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

MacLean Michael F

(Last) (First) (Middle)

C/O RESEARCH ALLIANCE CORPORATION III

600 FIFTH AVENUE, 23RD FLOOR

(Street)

NEW YORK NEW YORK 10020

(City) (State) (Zip)

UNITED STATES

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
05/19/2026

3. Issuer Name and Ticker or Trading Symbol
Research Alliance Corp III [ RACC ]

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		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)	Class A Ordinary Shares	39,130	(1)	D

Explanation of Responses:

1. Class B Ordinary Shares have no expiration date and will automatically convert into Class A Ordinary Shares of the Issuer at the time of the Issuer's initial business combination on a one-for-one basis (subject to adjustment for sub-divisions, share dividends, reorganizations, recapitalizations and the like), or at any time prior thereto at the option of the holder on a one-for-one basis, subject to adjustment pursuant to certain anti-dilution rights.

	/s/ Henry Stusnick, Attorney-in-Fact	05/19/2026
	** 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)