[S-1/A] Research Alliance Corp IV Amends IPO Registration Statement

Rhea-AI Filing Summary

Research Alliance Corporation IV, a Cayman Islands company with principal executive offices in New York, submitted Amendment No. 1 to its Form S-1 registration statement (File No. 333-296609).

The amendment is an exhibits-only update, filed solely to add an updated consent from the independent registered public accounting firm, CBIZ CPAs P.C., as an exhibit in Part II. All other portions of the registration statement remain unchanged. The document is signed on behalf of the company by Chief Executive Officer Matthew D. Hammond and Chief Financial Officer Fran Adams on July 8, 2026, with Hammond also acting as authorized representative.

Key Figures

Registration file number: 333-296609 Signature date: July 8, 2026 Promissory note date: April 7, 2026

3 metrics

Registration file number 333-296609 Form S-1 registration statement file number referenced in Amendment No. 1

Signature date July 8, 2026 Date the registrant and officers signed Amendment No. 1 in Boston, Massachusetts

Promissory note date April 7, 2026 Date of promissory note issued to the Sponsor listed as Exhibit 10.6

Key Terms

exhibits-only filing, Registration Statement, independent registered public accounting firm, Underwriting Agreement, +2 more

6 terms

exhibits-only filing regulatory

"is filing this Amendment No. 1 ... as an exhibits-only filing, solely to include"

Registration Statement regulatory

"Amendment No. 1 to its Registration Statement on Form S-1 (File No. 333-296609)"

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.

independent registered public accounting firm regulatory

"an updated consent of the Registrant’s independent registered public accounting firm as an exhibit"

An independent registered public accounting firm is an outside accounting company officially registered with the government regulator to examine and report on a public company's financial records and controls. Investors treat its reports like an impartial inspector’s certificate — they add credibility to financial statements, help spot errors or misleading claims, and reduce the risk that shareholders are relying on unchecked or biased numbers.

Underwriting Agreement financial

"1.1** | | Form of Underwriting Agreement.**"

An underwriting agreement is a contract where a company selling new stocks or bonds hires financial firms to buy those securities and resell them to investors. It matters because the agreement sets the offering price, number of securities, fees and which party bears the risk if sales fall short—think of it as a promise that the sale will happen and a roadmap investors can use to understand how the new securities reach the market.

Investment Management Trust Agreement financial

"Form of Investment Management Trust Agreement between Continental Stock Transfer"

A written contract that names who will run and make investment decisions for a trust’s assets, spells out their authority, duties, fees and how performance and risks will be handled. It matters to investors because it defines who is responsible for growing and protecting the money—like hiring a caretaker with a clear job description—and sets the rules and safeguards that affect returns, costs and how disputes or withdrawals are resolved.

Filing Fee Table regulatory

"107** | | Filing Fee Table.**"

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Available on EDGAR 07/14/2026 - 04:27 PM Accepted by SEC EDGAR 07/08/2026 - 04:52 PM Learn about SEC filing dates

As filed with the United States Securities and Exchange Commission on July 8, 2026

Registration 333-296609

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Amendment No. 1

to

FORM S-1

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

Research Alliance Corporation IV

(Exact name of registrant as specified in its charter)

Cayman Islands		6770		98- 1935760
(State or other jurisdiction of incorporation or organization)		(Primary Standard Industrial Classification Code Number)		(I.R.S. Employer Identification Number)

600 Fifth Avenue, 23^rd Floor

New York, NY 10020

Tel.: +1 (617) 778 2500

(Address, including zip code, and telephone number, including area code, of registrant’s principal executive offices)

Matthew Hammond

600 Fifth Avenue, 23^rd Floor

New York, NY 10020

Tel.: +1 (617) 778 2500

(Name, address, including zip code, and telephone number, including area code, of agent for service)

Copies to:

Eric Blanchard Peter Byrne Cooley LLP 500 Boylston Street, 14^th Floor Boston, Massachusetts 02116 (617) 937-2300 Christian O. Nagler Mathieu Kohmann Kirkland & Ellis LLP 601 Lexington Avenue New York, New York 10022 Tel.: (212) 446 4800

Approximate date of commencement of proposed sale to the public: As soon as practicable after the effective date of this registration statement.

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, check the following box. ☐

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

If this Form is a post-effective amendment filed pursuant to Rule 462(d) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Securities Exchange Act of 1934.

Large accelerated filer		☐		Accelerated filer		☐
Non-accelerated filer		☒		Smaller reporting company		☒
				Emerging growth company		☒

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. ☐

The registrant hereby amends this Registration Statement on such date or dates as may be necessary to delay its effective date until the registrant shall file a further amendment which specifically states that this Registration Statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act of 1933 or until this Registration Statement shall become effective on such date as the Commission, acting pursuant to said Section 8(a), may determine.

EXPLANATORY NOTE

Research Alliance Corporation IV is filing this Amendment No. 1 to its Registration Statement on Form S-1 (File No. 333-296609) (the “Registration Statement”) as an exhibits-only filing, solely to include in Part II of the Registration Statement an updated consent of the Registrant’s independent registered public accounting firm as an exhibit hereto. Accordingly, this amendment consists only of the facing page, this explanatory note, Item 16(a) of Part II of the Registration Statement, the signature page to the Registration Statement and the filed exhibit. The remainder of the Registration Statement is unchanged and has therefore been omitted.

PART II

INFORMATION NOT REQUIRED IN PROSPECTUS

Item 16. Exhibits and Financial Statement Schedules.

(a) Exhibits. The Exhibit Index is incorporated herein by reference.

EXHIBIT INDEX

EXHIBIT NO.		DESCRIPTION
1.1**		Form of Underwriting Agreement.**
3.1**		Memorandum and Articles of Association.**
3.2**		Form of Amended and Restated Memorandum and Articles of Association. **
4.1**		Specimen Ordinary Share Certificate.**
5.1**		Opinion of Maples and Calder (Cayman) LLP, Cayman Islands Counsel to the Registrant.**
10.1**		Form of Investment Management Trust Agreement between Continental Stock Transfer  & Trust Company and the Registrant.**
10.2**		Form  of Registration and Shareholder Rights Agreement among the Registrant, the Sponsor and the other Holders signatory thereto.**
10.3**		Form of Private Placement Shares Purchase Agreement between the Registrant and the Sponsor.**
10.4**		Form of Indemnity Agreement.**
10.5**		Form of Indemnification Agreement between the Registrant and the Sponsor.**
10.6**		Promissory Note, dated as of April 7, 2026, issued to the Sponsor.**
10.7**		Securities Subscription Agreement, dated April 7, 2026, between the Registrant and the Sponsor.**
10.8**		Form of Letter Agreement among the Registrant, the Sponsor and each director and executive officer of the Registrant.**
21.1**		List of Subsidiaries of Registrant.**
23.1*		Consent of CBIZ CPAs P.C.*
23.2**		Consent of Maples and Calder (Cayman) LLP (included in Exhibit 5.1).**
99.1**		Consent of John Maslowski.**
99.2**		Consent of Alan Musso.**
107**		Filing Fee Table.**

* Filed herewith.

** Previously filed.

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SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, as amended, the registrant has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Boston, State of Massachusetts, on the 8th day of July, 2026.

RESEARCH ALLIANCE CORPORATION IV
By:		/s/ Matthew D. Hammond
Name:		Matthew D. Hammond
Title:		Chief Executive Officer

Pursuant to the requirements of the Securities Act of 1933, as amended, this Registration Statement has been signed below by the following persons in the capacities and on the dates indicated.

Name		Position		Date
/s/ Matthew D. Hammond Matthew D. Hammond		Chief Executive Officer (Principal Executive Officer)		July 8, 2026
/s/ Fran Adams Fran Adams		Chief Financial Officer (Principal Financial and Accounting Officer)		July 8, 2026

II-2

AUTHORIZED REPRESENTATIVE

Pursuant to the requirements of Section 6(a) of the Securities Act of 1933, the undersigned has signed this registration statement, solely in its capacity as the duly authorized representative of Research Alliance Corporation IV, in the City of Boston, State of Massachusetts, on the 8th day of July, 2026.

By:		/s/ Matthew D. Hammond
		Name: Matthew D. Hammond
		Title: Authorized Representative

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