Perceptive Advisors reports 7.7% RACD stake in Research Alliance Corporation IV (RACD)

Rhea-AI Filing Summary

Research Alliance Corporation IV received a Schedule 13G reporting that Perceptive Advisors LLC, Joseph Edelman and Perceptive Life Sciences Master Fund, Ltd. collectively beneficially own 700,000 Class A Ordinary Shares. This represents 7.7% of the 9,098,529 Ordinary Shares outstanding as of July 13, 2026.

The Master Fund directly holds the 700,000 shares. Perceptive Advisors, as investment manager, and Mr. Edelman, as managing member, may be deemed to beneficially own these shares. All three reporting persons have shared voting and dispositive power over 700,000 shares and no sole voting or dispositive power.

Key Figures

Beneficially owned shares: 700,000 Class A Ordinary Shares Ownership percentage: 7.7% Shares outstanding: 9,098,529 Ordinary Shares +2 more

5 metrics

Beneficially owned shares 700,000 Class A Ordinary Shares Held by Perceptive Life Sciences Master Fund, Ltd. as reported by the group

Ownership percentage 7.7% Percent of Class A Ordinary Shares beneficially owned by each reporting person

Shares outstanding 9,098,529 Ordinary Shares Outstanding Class A Ordinary Shares as of prospectus dated July 13, 2026

Shared voting power 700,000 shares Shared voting power reported by each of the three reporting persons

Shared dispositive power 700,000 shares Shared power to dispose reported by each of the three reporting persons

Key Terms

beneficially own, Schedule 13G, shared voting power, shared dispositive power, +1 more

5 terms

beneficially own financial

"may be deemed to beneficially own shares held by the Master Fund"

Beneficially own means having the economic rights and risks of a security—such as the right to receive dividends, sell the shares, or profit from price changes—whether or not your name appears on the official share register. Think of it like renting a car: you use it and reap the benefits even if the title lists someone else. Investors care because beneficial ownership determines who truly controls value, must be disclosed under securities rules, and can signal potential influence or trading activity that affects a stock’s price.

Schedule 13G regulatory

"The ownership percentages are based on 9,098,529 Ordinary Shares outstanding"

A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.

shared voting power financial

"Shared Voting Power 700,000.00"

Shared voting power occurs when two or more parties jointly have the right to vote or decide how a block of company shares is cast, like co-owners who must agree before moving a piece of furniture. Investors care because who controls voting rights affects board elections, major corporate decisions and takeover outcomes, and shared control can alter regulatory disclosures and the practical influence any holder has over a company’s direction and value.

shared dispositive power financial

"Shared Dispositive Power 700,000.00"

CUSIP Number regulatory

"CUSIP Number(s): G75228109"

A CUSIP number is a nine-character code that uniquely identifies a specific U.S. or Canadian stock, bond, or other security, similar to a barcode or a social-security number for a financial instrument. It matters to investors because it removes confusion between similar securities, ensures trades and settlements are applied to the correct issue, and helps locate official documents and transaction records quickly.

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

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FAQ

What ownership stake in RACD did Perceptive Advisors report on Schedule 13G?

Perceptive Advisors and related reporting persons disclosed beneficial ownership of 700,000 Class A Ordinary Shares of RACD. This position represents 7.7% of the 9,098,529 Ordinary Shares outstanding as of July 13, 2026.

How many Research Alliance Corporation IV shares are outstanding (RACD)?

The Schedule 13G states that there are 9,098,529 Class A Ordinary Shares outstanding of Research Alliance Corporation IV. The 7.7% stake reported by the Perceptive entities is calculated based on this outstanding share count.

Who are the reporting persons on the RACD Schedule 13G?

The reporting persons are Perceptive Advisors LLC, Joseph Edelman, and Perceptive Life Sciences Master Fund, Ltd.. The Master Fund directly holds the shares; Perceptive Advisors and Mr. Edelman may be deemed to beneficially own them through their roles.

How many RACD shares does Perceptive Life Sciences Master Fund directly hold?

Perceptive Life Sciences Master Fund, Ltd. directly holds 700,000 Class A Ordinary Shares of RACD. This direct holding underlies the 7.7% beneficial ownership position reported jointly with Perceptive Advisors LLC and Joseph Edelman.

What voting power do the Perceptive entities have over RACD shares?

Perceptive Advisors, Joseph Edelman and the Master Fund report shared voting power over 700,000 shares and no sole voting power. They also report shared dispositive power over the same 700,000 shares and no sole dispositive power.

What class of RACD securities is covered by this Schedule 13G?

The Schedule 13G covers Class A Ordinary Shares, par value $0.0001 per share, of Research Alliance Corporation IV. The reported 7.7% beneficial ownership and all voting and dispositive power figures relate specifically to this class.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

Research Alliance Corporation IV

(Name of Issuer)

Class A Ordinary Shares, par value $0.0001 per share

(Title of Class of Securities)

G75228109

(CUSIP Number)

07/13/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): G75228109

1

Names of Reporting Persons

Perceptive Advisors LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 700,000.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 700,000.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

700,000.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

7.7 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

CUSIP Number(s): G75228109

1

Names of Reporting Persons

Joseph Edelman

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 700,000.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 700,000.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

700,000.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

7.7 %

12

Type of Reporting Person (See Instructions)

IN

SCHEDULE 13G

CUSIP Number(s): G75228109

1

Names of Reporting Persons

Perceptive Life Sciences Master Fund, Ltd.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

CAYMAN ISLANDS

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 700,000.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 700,000.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

700,000.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

7.7 %

12

Type of Reporting Person (See Instructions)

CO

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Research Alliance Corporation IV
(b)	Address of issuer's principal executive offices: 600 FIFTH AVENUE, 23RD FLOOR, NEW YORK, NY, 10020
Item 2.
(a)	Name of person filing: The names of the persons filing this report (collectively, the "Reporting Persons") with respect to the Class A Ordinary Shares, par value $0.0001 per share (the "Ordinary Shares") of Research Alliance Corporation IV (the "Issuer") are: (i) Perceptive Advisors LLC ("Perceptive Advisors") (ii) Joseph Edelman ("Mr. Edelman") (iii) Perceptive Life Sciences Master Fund, Ltd. (the "Master Fund")
(b)	Address or principal business office or, if none, residence: The address of the principal business office of each of the Reporting Persons is: 51 Astor Place, 10th Floor, New York, NY 10003
(c)	Citizenship: Perceptive Advisors is a Delaware limited liability company. Mr. Edelman is a United States citizen. The Master Fund is a Cayman Islands corporation.
(d)	Title of class of securities: Class A Ordinary Shares, par value $0.0001 per share
(e)	CUSIP Number(s): G75228109
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: The information required by this item with respect to each Reporting Person is set forth in Rows 5 through 9 and 11 of the cover pages to this Schedule 13G. The ownership percentages are based on 9,098,529 Ordinary Shares outstanding, as reported by the Issuer in its prospectus filed pursuant to Rule 424(b)(4) with the Securities and Exchange Commission on July 13, 2026. The Master Fund directly holds 700,000 Ordinary Shares. Perceptive Advisors serves as the investment manager to the Master Fund and may be deemed to beneficially own shares held by the Master Fund. Mr. Edelman is the managing member of Perceptive Advisors and may be deemed to beneficially own the shares held by the Master Fund.
(b)	Percent of class: Perceptive Advisors: 7.7% Mr. Edelman: 7.7% Master Fund: 7.7%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: Perceptive Advisors: 0 Mr. Edelman: 0 Master Fund: 0
	(ii) Shared power to vote or to direct the vote: Perceptive Advisors: 700,000 Mr. Edelman: 700,000 Master Fund: 700,000
	(iii) Sole power to dispose or to direct the disposition of: Perceptive Advisors: 0 Mr. Edelman: 0 Master Fund: 0
	(iv) Shared power to dispose or to direct the disposition of: Perceptive Advisors: 700,000 Mr. Edelman: 700,000 Master Fund: 700,000
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Perceptive Advisors LLC

Signature:	/s/ Joseph Edelman
Name/Title:	Joseph Edelman, Managing Member
Date:	07/20/2026

Joseph Edelman

Signature:	/s/ Joseph Edelman
Name/Title:	Joseph Edelman
Date:	07/20/2026

Perceptive Life Sciences Master Fund, Ltd.

Signature:	/s/ Joseph Edelman
Name/Title:	Joseph Edelman, Managing Member
Date:	07/20/2026

Exhibit Information

Exhibit 99.1 - Joint Filing Agreement