Rainier director reports 25K convertible shares

Rainier Acquisition Corp (RNAQU) reported that director Isaac Manke holds 25,000 Class B ordinary shares directly.

Rhea-AI Filing Summary

Rainier Acquisition Corp (RNAQU) reported that director Isaac Manke holds 25,000 Class B ordinary shares directly. Each Class B ordinary share is convertible into one Class A ordinary share, for an underlying 25,000 Class A ordinary shares. The Class B ordinary shares have no expiration date and will automatically convert at the time of the company’s initial business combination or earlier at the holder’s option.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Manke Isaac

Role Director

Type	Security	Shares	Price	Value
holding	Class B ordinary shares F1	--	--	--

Holdings After Transaction: Class B ordinary shares — 25,000 contracts (Direct)

Footnotes (1)

1. F1. Each Class B ordinary share is convertible into one Class A ordinary share at the option of the holder, and will automatically convert at the time of the Issuer's initial business combination or earlier at the option of the holder, on a one-for-one basis. The Class B ordinary shares have no expiration date.

Key Figures

Class B ordinary shares held: 25,000 shares Underlying Class A ordinary shares: 25,000 shares Conversion ratio: 1 Class A ordinary share for each 1 Class B ordinary share

3 metrics

Class B ordinary shares held 25,000 shares Direct holdings by director Isaac Manke as of August 26, 2026

Underlying Class A ordinary shares 25,000 shares Shares issuable upon one-for-one conversion of Class B ordinary shares

Conversion ratio 1 Class A ordinary share for each 1 Class B ordinary share Conversion terms for Class B ordinary shares held by Isaac Manke

Key Terms

Class B ordinary shares, Class A ordinary shares, initial business combination, one-for-one basis

4 terms

Class B ordinary shares financial

"Each Class B ordinary share is convertible into one Class A ordinary share"

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

"Each Class B ordinary share is convertible into one Class A ordinary share"

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

"will automatically convert 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.

one-for-one basis financial

"on a one-for-one basis. The Class B ordinary shares have no expiration date"

FAQ

What did director Isaac Manke report in this Form 3 for RNAQU?

Director Isaac Manke reported beneficial ownership of 25,000 Class B ordinary shares of Rainier Acquisition Corp, held directly, as of August 26, 2026.

How many shares does Isaac Manke effectively control in Rainier Acquisition Corp (RNAQU)?

Isaac Manke holds 25,000 Class B ordinary shares, each convertible into one Class A ordinary share, representing an underlying 25,000 Class A ordinary shares if converted on a one-for-one basis.

Are the Class B ordinary shares reported by Isaac Manke in RNAQU subject to expiration?

No. The filing states that the Class B ordinary shares have no expiration date. They are convertible into Class A ordinary shares on a one-for-one basis and will automatically convert at the time of Rainier Acquisition Corp’s initial business combination or earlier at the holder’s option.

When will Isaac Manke’s Class B shares in RNAQU convert into Class A shares?

Each Class B ordinary share is convertible into one Class A ordinary share at the option of the holder and will also automatically convert at the time of the company’s initial business combination on a one-for-one basis.

Does this RNAQU Form 3 indicate trades or a Rule 10b5-1 trading plan for Isaac Manke?

No trades are reported. The Form 3 reflects a holding of 25,000 Class B ordinary shares. No Rule 10b5-1 trading plan is reported in connection with this holding.

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Available on EDGAR 09/02/2026 - 09:11 AM Accepted by SEC EDGAR 08/26/2026 - 05:25 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
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

Manke Isaac

(Last) (First) (Middle)

1 PENN PLAZA, 48TH FLOOR

(Street)

NEW YORK NEW YORK 10119

(City) (State) (Zip)

UNITED STATES

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
08/26/2026

3. Issuer Name and Ticker or Trading Symbol
Rainier Acquisition Corp [ RNAQ ]

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	25,000	(1)	D

Explanation of Responses:

1. Each Class B ordinary share is convertible into one Class A ordinary share at the option of the holder, and will automatically convert at the time of the Issuer's initial business combination or earlier at the option of the holder, on a one-for-one basis. The Class B ordinary shares have no expiration date.

Remarks:

Exhibit 24 - Power of Attorney

	/s/ Guy Barudin, Attorney-in-Fact	08/26/2026
	** 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)