JATT III sponsor reports 1.73M JTTT shares

JATT III Acquisition Corp (JTTT) reports the initial beneficial ownership of its sponsor and a senior insider.

Rhea-AI Filing Summary

JATT III Acquisition Corp (JTTT) reports the initial beneficial ownership of its sponsor and a senior insider. JATT Ventures III L.P., the sponsor, holds 1,725,000 Ordinary Shares, including up to 225,000 shares that may be forfeited depending on the underwriter’s IPO over-allotment option. Dr. Someit Sidhu, the company’s CEO, Chairman, and a 10% owner, has voting and investment discretion over the sponsor’s shares but disclaims beneficial ownership beyond any pecuniary interest. No new purchase or sale is reported; this filing establishes existing holdings.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider JATT Ventures III L.P., Sidhu Someit

Role 10% Owner | CEO and Chairman

Type	Security	Shares	Price	Value
holding	Ordinary Shares F1	--	--	--

Holdings After Transaction: Ordinary Shares — 1,725,000 shares (Direct)

Footnotes (1)

1. F1. Includes up to 225,000 shares subject to forfeiture by JATT Ventures III L.P. (the "Sponsor") depending on the extent to which the underwriter's over-allotment option for the IPO (as defined below) is exercised, as described in the Registration Statement on Form S-1 (File No. 333-298161) related to the Issuer's initial public offering (the "IPO"). The Sponsor is the record holder of the securities reported herein. JATT Ventures III Ltd is the sole general partner of the Sponsor, and Dr. Someit Sidhu is a limited partner of the Sponsor. Dr. Someit Sidhu is also the sole member of JATT Ventures III Ltd. Dr. Someit Sidhu has voting and investment discretion with respect to the ordinary shares held of record by the Sponsor. Dr. Someit Sidhu disclaims any beneficial ownership of the securities held by the Sponsor other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

Key Figures

Ordinary Shares held by sponsor: 1,725,000 shares Shares subject to forfeiture: 225,000 shares Reporting persons: 2 individuals/entities

3 metrics

Ordinary Shares held by sponsor 1,725,000 shares Reported holdings of JATT Ventures III L.P. in JATT III Acquisition Corp

Shares subject to forfeiture 225,000 shares Portion of sponsor’s holdings subject to forfeiture depending on IPO over-allotment option

Reporting persons 2 individuals/entities JATT Ventures III L.P. and Dr. Someit Sidhu identified as reporting persons

Key Terms

over-allotment option, beneficial ownership, pecuniary interest, initial public offering

4 terms

over-allotment option financial

"depending on the extent to which the underwriter's over-allotment option"

An over-allotment option is a special agreement that allows underwriters to sell more shares than initially planned if demand is high. Think of it like a retailer offering extra units of a popular product to meet additional customer interest. This option helps ensure the full sale is completed and can also give investors extra shares if they want more.

beneficial ownership financial

"Dr. Someit Sidhu disclaims any beneficial ownership of the securities"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

pecuniary interest financial

"other than to the extent of any pecuniary interest he may have"

initial public offering financial

"related to the Issuer's initial public offering (the "IPO")"

An initial public offering (IPO) is when a private company first sells its shares to the public and becomes a stock-listed company. It matters because it allows the company to raise money from a wide range of investors, helping it grow, while giving early shareholders a way to sell some of their ownership.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider holdings are reported in JTTT’s Form 3?

The sponsor, JATT Ventures III L.P., reports holding 1,725,000 Ordinary Shares of JATT III Acquisition Corp. This is an initial statement of beneficial ownership rather than a report of new transactions.

How many JTTT shares are subject to forfeiture under the IPO over-allotment option?

Up to 225,000 Ordinary Shares are subject to forfeiture by JATT Ventures III L.P., depending on how much of the underwriter’s IPO over-allotment option is exercised, as described in the company’s IPO registration statement.

What is Dr. Someit Sidhu’s role and interest in JTTT’s sponsor?

Dr. Someit Sidhu is CEO and Chairman of JATT III Acquisition Corp and a 10% owner. He is a limited partner of the sponsor, the sole member of its general partner, and has voting and investment discretion over the sponsor’s shares, while disclaiming beneficial ownership except for any pecuniary interest.

Does this JTTT Form 3 report any insider share purchases or sales?

No. The Form 3 reports existing holdings of 1,725,000 Ordinary Shares by JATT Ventures III L.P., with 225,000 potentially forfeitable, and describes Dr. Sidhu’s relationship to those holdings. It does not report any new purchases or sales.

Who is the record holder of the JTTT shares reported on this Form 3?

The record holder of the reported 1,725,000 Ordinary Shares is JATT Ventures III L.P., the sponsor of JATT III Acquisition Corp. JATT Ventures III Ltd is the sole general partner of the sponsor.

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

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Available on EDGAR 09/02/2026 - 09:11 AM EDT Accepted by SEC EDGAR 08/25/2026 - 07:31 PM EDT 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^*

JATT Ventures III L.P.

(Last) (First) (Middle)

153 CENTRAL AVENUE C/O 56

(Street)

WESTFIELD NEW JERSEY 07091

(City) (State) (Zip)

UNITED STATES

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
08/25/2026

3. Issuer Name and Ticker or Trading Symbol
JATT III Acquisition Corp [ JTTT ]

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)

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

6. Individual or Joint/Group Filing (Check Applicable Line)

	Form filed by One Reporting Person
X	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)
Ordinary Shares	1,725,000(1)	D

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

1. Name and Address of Reporting Person^*

JATT Ventures III L.P.

(Last) (First) (Middle)

153 CENTRAL AVENUE C/O 56

(Street)

WESTFIELD NEW JERSEY 07091

(City) (State) (Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

Sidhu Someit

(Last) (First) (Middle)

C/O JATT III ACQUISITION CORP

153 CENTRAL AVENUE C/O 56

(Street)

WESTFIELD NEW JERSEY 07091

(City) (State) (Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer

X	Director	X	10% Owner
X	Officer (give title below)		Other (specify below)
	CEO and Chairman

Explanation of Responses:

1. Includes up to 225,000 shares subject to forfeiture by JATT Ventures III L.P. (the "Sponsor") depending on the extent to which the underwriter's over-allotment option for the IPO (as defined below) is exercised, as described in the Registration Statement on Form S-1 (File No. 333-298161) related to the Issuer's initial public offering (the "IPO"). The Sponsor is the record holder of the securities reported herein. JATT Ventures III Ltd is the sole general partner of the Sponsor, and Dr. Someit Sidhu is a limited partner of the Sponsor. Dr. Someit Sidhu is also the sole member of JATT Ventures III Ltd. Dr. Someit Sidhu has voting and investment discretion with respect to the ordinary shares held of record by the Sponsor. Dr. Someit Sidhu disclaims any beneficial ownership of the securities held by the Sponsor other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

	/s/ Someit Sidhu	08/25/2026
	** 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)