Great Point Partners, LLC, together with Dr. Jeffrey R. Jay, M.D. and Ms. Lillian Nordahl, reports beneficial ownership of 500,000 ordinary shares of JATT II Acquisition Corp., representing 6.23% of the class. These figures are based on 8,025,000 shares outstanding as reported by the issuer as of a prior Form 10-Q.
The 500,000 shares consist of 330,000 shares held by Biomedical Value Fund, L.P. and 170,000 shares held by Biomedical Offshore Value Fund, Ltd., for which Great Point acts as investment manager. Dr. Jay and Ms. Nordahl, in their roles at Great Point, share voting and dispositive power over these shares, while each disclaims beneficial ownership except to the extent of any pecuniary interest.
Positive
None.
Negative
None.
Key Figures
Beneficial ownership:500,000 sharesOwnership percentage:6.23%Shares outstanding baseline:8,025,000 shares+2 more
5 metrics
Beneficial ownership500,000 sharesOrdinary shares of JATT II Acquisition Corp. reported as beneficially owned
Ownership percentage6.23%Percentage of JATT II Acquisition Corp. ordinary shares represented by 500,000 shares
Shares outstanding baseline8,025,000 sharesTotal JATT II shares outstanding used to calculate the 6.23% stake
BVF holdings330,000 sharesShares of JATT II held by Biomedical Value Fund, L.P.
BOVF holdings170,000 sharesShares of JATT II held by Biomedical Offshore Value Fund, Ltd.
"may be deemed to be the beneficial owner of the BVF Shares"
A beneficial owner is the person who ultimately owns or controls a financial asset or property, even if their name isn't directly on official documents. Think of it like someone who secretly holds the keys to a safe deposit box—others may appear to have access, but the true owner is the one who benefits from what's inside. Identifying beneficial owners helps ensure transparency and prevent illegal activities like money laundering or fraud.
shared voting powerfinancial
"Shared Voting Power 500,000.00"
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 powerfinancial
"Shared Dispositive Power 500,000.00"
Investment Adviser (IA)financial
"11 6.23 % 12 IA,"
An investment adviser (IA) is a person or firm that provides personalized guidance on buying, selling, or holding investments and often manages client portfolios for a fee. Investors should care because an IA has a legal duty to act in the client's best interest—think of them as a navigator who plans and steers your financial journey—so their advice, fee structure and potential conflicts can directly affect returns and financial risk.
Schedule 13Gregulatory
"JOINT FILING STATEMENT PURSUANT TO RULE 13d-1(k)"
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.
FAQ
What stake in JATT (JATT) does Great Point Partners report?
Great Point Partners and affiliates report beneficial ownership of 500,000 JATT II Acquisition Corp. ordinary shares, representing 6.23% of the outstanding class, based on 8,025,000 shares reported outstanding by the issuer.
How many JATT (JATT) shares do BVF and BOVF hold?
Biomedical Value Fund, L.P. holds 330,000 JATT shares and Biomedical Offshore Value Fund, Ltd. holds 170,000 shares, totaling 500,000 shares over which Great Point and its principals share voting and dispositive power.
What percentage of JATT (JATT) does 500,000 shares represent?
The filing states that 500,000 JATT II Acquisition Corp. ordinary shares represent 6.23% of the class, calculated using 8,025,000 shares outstanding as reported by the company in a prior Form 10-Q.
Do Great Point, Dr. Jay, and Ms. Nordahl fully own all JATT (JATT) shares reported?
They may be deemed beneficial owners through investment management roles and shared voting and dispositive power but expressly disclaim beneficial ownership of the BVF and BOVF shares except to the extent of any pecuniary interests.
What type of investor is Great Point Partners in relation to JATT (JATT)?
Great Point Partners, LLC is identified with the type code IA (investment adviser), while Dr. Jay and Ms. Nordahl are identified as HC (holding companies), reflecting their roles overseeing the funds that hold JATT shares.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
(Amendment No. 1)
JATT II Acquisition Corp.
(Name of Issuer)
Ordinary shares, par value $0.0001 per share
(Title of Class of Securities)
G50765109
(CUSIP Number)
06/30/2026
(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):
G50765109
1
Names of Reporting Persons
Great Point Partners, 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
500,000.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
500,000.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
500,000.00
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)
6.23 %
12
Type of Reporting Person (See Instructions)
IA, OO
SCHEDULE 13G
CUSIP Number(s):
G50765109
1
Names of Reporting Persons
Dr. Jeffrey R. Jay, M.D.
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
500,000.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
500,000.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
500,000.00
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)
6.23 %
12
Type of Reporting Person (See Instructions)
HC, IN
SCHEDULE 13G
CUSIP Number(s):
G50765109
1
Names of Reporting Persons
Ms. Lillian Nordahl
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
500,000.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
500,000.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
500,000.00
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)
6.23 %
12
Type of Reporting Person (See Instructions)
HC, IN
SCHEDULE 13G
Item 1.
(a)
Name of issuer:
JATT II Acquisition Corp.
(b)
Address of issuer's principal executive offices:
153 Central Avenue, C/O 56, Westfield, NJ 07091
Item 2.
(a)
Name of person filing:
Great Point Partners, LLC
Dr. Jeffrey R. Jay, M.D.
Ms. Lillian Nordahl
The Reporting Persons have entered into a Joint Filing Agreement, dated August 14, 2026, a copy of which is filed with this SCHEDULE 13G as Exhibit A, pursuant to which the Reporting Persons have agreed to file this statement jointly in accordance with the provisions of Rule 13d-1(k)(1) under the Act.
(b)
Address or principal business office or, if none, residence:
The address of the principal business office of each of the Reporting Persons is
165 Mason Street, 3rd Floor
Greenwich, CT 06830
(c)
Citizenship:
Great Point Partners, LLC is a limited liability company organized under the laws of the State of Delaware. Dr. Jeffrey R. Jay, M.D. is a citizen of the United States. Ms. Lillian Nordahl is a citizen of the United States.
(d)
Title of class of securities:
Ordinary shares, par value $0.0001 per share
(e)
CUSIP No.:
G50765109
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:
500,000
(b)
Percent of class:
6.23%
(c)
Number of shares as to which the person has:
(i) Sole power to vote or to direct the vote:
0
(ii) Shared power to vote or to direct the vote:
500,000
(iii) Sole power to dispose or to direct the disposition of:
0
(iv) Shared power to dispose or to direct the disposition of:
500,000
Item 4
The information required by Items 4(a) - (c) is set forth in Rows (5) - (11) of the cover pages for the Reporting Persons and is incorporated herein by reference.
The percentage set forth in Row (11) of the cover pages for the Reporting Persons are based on a total of 8,025,000 shares outstanding, as reported by the Issuer in its Form 10-Q filed with the Securities and Exchange Commission (the "SEC") on May 29, 2026.
Biomedical Value Fund, L.P. ("BVF") is the record holder of 330,000 shares of Common Stock (the "BVF Shares"). Great Point Partners, LLC ("Great Point") is the investment manager of BVF, and by virtue of such status may be deemed to be the beneficial owner of the BVF Shares. Each of Dr. Jeffrey R. Jay, M.D. ("Dr. Jay"), as Senior Managing Member of Great Point, and Ms. Lillian Nordahl ("Ms. Nordahl"), as Managing Director of Great Point, has voting and investment power with respect to the BVF Shares, and therefore may be deemed to be the beneficial owner of the BVF Shares.
Biomedical Offshore Value Fund, Ltd. ("BOVF") is the record holder of 170,000 shares of Common Stock (the "BOVF Shares"). Great Point is the investment manager of BOVF, and by virtue of such status may be deemed to be the beneficial owner of the BOVF Shares. Each of Dr. Jeffrey R. Jay, M.D. ("Dr. Jay"), as Senior Managing Member of Great Point, and Ms. Lillian Nordahl ("Ms. Nordahl"), as Managing Director of Great Point, has voting and investment power with respect to the BOVF Shares, and therefore may be deemed to be the beneficial owner of the BOVF Shares.
Notwithstanding the above, Great Point, Dr. Jay and Ms. Nordahl disclaim beneficial ownership of the BVF Shares and the BOVF Shares, except to the extent of their respective pecuniary interests.
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.
If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required.
See Item 4.
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.
Great Point Partners, LLC
Signature:
/s/ Dr. Jeffrey R. Jay, M.D
Name/Title:
Dr. Jeffrey R. Jay, M.D - Senior Managing Member
Date:
08/14/2026
Dr. Jeffrey R. Jay, M.D.
Signature:
/s/ Dr. Jeffrey R. Jay, M.D
Name/Title:
Dr. Jeffrey R. Jay, M.D
Date:
08/14/2026
Ms. Lillian Nordahl
Signature:
/s/ Ms. Lillian Nordahl
Name/Title:
Ms. Lillian Nordahl
Date:
08/14/2026
Exhibit Information
JOINT FILING STATEMENT
PURSUANT TO RULE 13d-1(k)
The undersigned hereby agree as follows:
(i) Each of them is individually eligible to use the SCHEDULE 13G to which this Exhibit is attached, and such SCHEDULE 13G is filed on behalf of each of them; and
(ii) Each of them is responsible for the timely filing of such SCHEDULE 13G and any amendments thereto, and for the completeness and accuracy of the information concerning such person contained therein; but none of them is responsible for the completeness or accuracy of the information concerning the other persons making the filing, unless such person knows or has reason to believe that such information is inaccurate.
Dated: August 14, 2026
Great Point Partners, LLC
By: /s/ Dr. Jeffrey R. Jay, M.D.
Dr. Jeffrey R. Jay, M.D., as Senior Managing Member
Dr. Jeffrey R. Jay, M.D.
By: /s/ Dr. Jeffrey R. Jay, M.D.
Dr. Jeffrey R. Jay, M.D.
Ms. Lillian Nordahl
By: /s/ Ms. Lillian Nordahl
Ms. Lillian Nordahl
