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Research Alliance III (RACC) sponsor in OHB Pediatrics SPAC deal

(Moderate)
(Neutral)
Form Type
SCHEDULE 13D/A

Rhea-AI Filing Summary

Research Alliance Holdings III LLC and its manager Matthew Hammond report beneficial ownership of 1,520,269 Class A ordinary shares of Research Alliance Corporation III on an as-converted basis, representing 16.9% of 7,775,000 Class A shares outstanding as of June 24, 2026.

The amendment reflects a Business Combination Agreement under which Research Alliance Corporation III will acquire 100% of OHB Pediatrics Ltd. in exchange for newly issued common stock after a planned domestication from the Cayman Islands to Delaware and the one-for-one conversion of all Class B into Class A shares.

Consideration will equal an Adjusted Equity Value composed of a $160,000,000 base equity value plus the Company SAFE Amount, with shareholders offered cash redemptions equal to each share’s pro rata portion of the trust account. Additional terms include $45,000,000 of Company SAFEs at 8% interest, a backstop of up to 7,500,000 shares at $10.00 per share (up to $75,000,000), investor rights and lock-up agreements, and an expected closing in the second half of 2026 subject to regulatory, shareholder and other customary conditions.

Positive

  • None.

Negative

  • None.

Filing Explained

The sponsor’s Class B shares convert one-for-one at closing, while its vote and anti-dilution waiver support a potentially dilutive issuance.

This Schedule 13D/A updates an above-5% ownership report and states that RA Holdings III and Matthew Hammond share voting and dispositive power over 1,520,269 shares, comprising 275,000 Class A shares and 1,245,269 Class B shares.

The Class B shares are scheduled to convert one-for-one into Class A shares at the business combination closing, or earlier at the holder’s option. The sponsor also agreed to vote for the transaction and waive adjustments or other anti-dilution protections for its Class B shares.

Those commitments are agreements tied to a proposed transaction, not evidence that the acquisition or the related share issuance has closed. If the transaction is completed, newly issued shares for the OHB Pediatrics acquisition and any backstop subscription would increase the share count, reducing existing holders’ percentage ownership absent offsetting changes.

At closing, certain holders would also receive resale-registration rights, while specified existing shares would be subject to a six-month transfer lock-up; the filing’s next state change is satisfaction of the stated closing conditions.

Beneficial ownership 1,520,269 Class A shares Shares beneficially owned by each reporting person on an as-converted basis
Ownership percentage 16.9% Portion of Class A ordinary shares based on 7,775,000 shares outstanding as of June 24, 2026
Class A shares outstanding 7,775,000 Class A shares Outstanding as of June 24, 2026, as reported in the issuer’s Form 10-Q
Base Equity Value $160,000,000 Base equity value used to compute Adjusted Equity Value for OHB Pediatrics acquisition
Company SAFEs principal $45,000,000 Aggregate principal amount of Company SAFEs providing interim financing
SAFE interest rate 8% per annum Interest rate on Company SAFEs until conversion into ordinary shares before Closing
Backstop limit 7,500,000 shares at $10.00 per share Maximum RACC Common Stock the Fund may subscribe for, capped at $75,000,000
Lock-up period six months Duration after Closing during which specified holders agree not to transfer RACC Common Stock
Business Combination Agreement financial
"entered into a Business Combination Agreement pursuant to which the Issuer will acquire 100%"
A business combination agreement is a detailed contract that lays out the terms for two companies to join together—covering price, how ownership will be split, the steps needed to close the deal, and what each side promises to do or avoid before closing. For investors it matters because the agreement determines potential changes in value, control, timing, and risk exposure—think of it like the playbook for a merger that shows who wins, who pays, and what could still derail the plan.
Domestication regulatory
"de-register from the Cayman Islands and domesticate as a Delaware corporation (the "Domestication")"
Domestication is the legal process by which a company changes its official ‘legal home’ from one place to another without creating a new business entity, similar to moving a household’s registration from one city to another while keeping the same people and possessions. It matters to investors because it can alter which laws, tax rules, reporting standards and shareholder rights apply, potentially affecting costs, governance and the value or liquidity of the company’s shares.
simple agreement for future equity financial
"entered into a simple agreement for future equity (collectively, the "Company SAFEs") with the Company"
A simple agreement for future equity is an investment contract that gives an investor the right to receive company shares at a later financing event or sale instead of getting shares immediately. Think of it like a voucher that converts into ownership once the company’s value is formally set; it matters to investors because it fixes how and when ownership is awarded, affects how much of the company they ultimately own, and influences dilution and return potential.
Backstop Agreement financial
"the Issuer and the Fund entered into the Backstop Agreement (the "Backstop Agreement")"
A backstop agreement is a guarantee from a third party to buy any unsold shares or take up remaining financing in a company’s stock sale or fundraising round, acting like a safety net so the deal goes through. For investors, it lowers the chance that a planned capital raise will fail and clarifies how much new stock might be issued and who will hold it, which can affect share value and dilution.
Investor Rights Agreement regulatory
"will enter into an investor rights agreement (the "Investor Rights Agreement")"
A legally binding contract between a company and its investors that spells out investors’ core protections and privileges—such as voting rights, how and when shares can be sold, information access, and steps for resolving disputes. Think of it like a rulebook or homeowner association agreement for ownership: it clarifies who gets a say, how value can be realized, and what protections exist if things go wrong, making investment risks and expectations clearer for shareholders.
Lock-Up Agreement financial
"will enter into a lock-up agreement (the "Lock-Up Agreement") with the Issuer"
A lock-up agreement is a contract that prevents company insiders and early investors from selling their shares for a fixed period after a stock sale, often after an initial public offering. It matters to investors because it temporarily limits the number of shares that can hit the market, which can keep the share price steadier; when the lock-up ends, a sudden increase in available shares can create extra volatility, revealing insiders’ confidence or lack thereof.

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

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FAQ

What ownership stake in Research Alliance Corporation III (RACC) do the reporting persons disclose?

The reporting persons beneficially own 1,520,269 Class A ordinary shares on an as-converted basis, representing 16.9% of 7,775,000 Class A shares outstanding as of June 24, 2026, based on the issuer’s most recent quarterly report.

What business combination involving RACC and OHB Pediatrics is described in this Schedule 13D/A?

RACC has entered into a Business Combination Agreement to acquire 100% of OHB Pediatrics Ltd. Shares of OHB Pediatrics will be exchanged for newly issued RACC common stock following RACC’s domestication to Delaware and conversion of all Class B shares into Class A.

How is the purchase price for the OHB Pediatrics acquisition by RACC structured?

Closing consideration is based on an Adjusted Equity Value equal to a $160,000,000 Base Equity Value plus the Company SAFE Amount. That SAFE Amount equals principal and accrued interest on $45,000,000 of Company SAFEs bearing 8% annual interest, all converted into equity before closing.

What backstop financing does the filing describe for RACC’s shareholder redemptions?

Under a Backstop Agreement, RA Capital Healthcare Fund, L.P. may subscribe for up to 7,500,000 shares of RACC Common Stock at $10.00 per share. The aggregate amount the fund can be required to provide will not exceed $75,000,000.

What lock-up and investor rights arrangements are associated with the RACC and OHB Pediatrics transaction?

At closing, certain RACC and OHB Pediatrics holders will sign an Investor Rights Agreement providing resale registration and piggyback rights, plus a Lock-Up Agreement restricting transfers of specified RACC shares for six months after closing, subject to permitted transfer exceptions.





G75226103

(CUSIP Number)
Matthew Hammond
c/o Research Alliance Corporation III, 600 Fifth Avenue, 23rd Floor
New York, NY, 10020
(617) 778 2500

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)
07/26/2026

(Date of Event Which Requires Filing of This Statement)


If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.

The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).




schemaVersion:


SCHEDULE 13D






SCHEDULE 13D






SCHEDULE 13D


Research Alliance Holdings III LLC
Signature:/s/ Matthew Hammond
Name/Title:By Matthew Hammond, Manager
Date:07/28/2026
Matthew Hammond
Signature:/s/ Matthew Hammond
Name/Title:Matthew Hammond
Date:07/28/2026