[SCHEDULE 13G] Inflection Point Acquisition Corp. III Units SEC Filing

Rhea-AI Filing Summary

Healthcare of Ontario Pension Plan Trust Fund (HOOPP) reports beneficial ownership of 2,400,000 Class A ordinary shares of Siddhi Acquisition Corp, representing 8.6% of the Class A shares outstanding based on the issuer's reported share count of 27,938,000. The position is held in the form of units, each consisting of one Class A share and one right, where each right entitles the holder to one-tenth of a Class A share.

The filing identifies HOOPP as a pension plan trust formed under Ontario law and certifies that the securities were acquired and are held in the ordinary course of business and not for the purpose of changing or influencing control of the issuer.

Positive

• Material institutional stake disclosed: HOOPP reports ownership of 2,400,000 Class A shares, representing 8.6% of outstanding Class A shares.
• Passive holding certified: The filing states the securities are held in the ordinary course of business and not to influence control.

Negative

• None.

Insights

Securities Analyst

TL;DR: HOOPP holds a material, passive ~8.6% stake in Siddhi Acquisition Corp, reported via Schedule 13G.

The reported 2.4M-share stake exceeds the 5% disclosure threshold and is therefore material for investors to note. The filing is a Schedule 13G-style disclosure indicating passive ownership; HOOPP certifies the position is held in the ordinary course of business and not to influence control. For market participants, the key implication is identification of a significant institutional holder without active control intent, which can affect shareholder base composition and potential liquidity for the stock's Class A tranche.

Corporate Governance Expert

TL;DR: A large pension plan reports a passive stake; governance changes are not signaled by this filing.

The filer is a pension plan trust under Ontario law, and the certification explicitly disclaims acquisition for control purposes. That procedural declaration and the use of Schedule 13G suggest no immediate governance activism. Nonetheless, the disclosure provides transparency about a sizeable long-only institutional holder, which is relevant for assessing shareholder alignment and potential voting outcomes should circumstances change.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

Siddhi Acquisition Corp

(Name of Issuer)

Class A ordinary shares, $0.0001 par value

(Title of Class of Securities)

G8118C124

(CUSIP Number)

06/30/2025

(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)

SCHEDULE 13G

CUSIP No. G8118C124

1

Names of Reporting Persons

Healthcare of Ontario Pension Plan Trust Fund

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

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 2,400,000.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 2,400,000.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,400,000.00

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)

8.6 %

12

Type of Reporting Person (See Instructions)

FI

Comment for Type of Reporting Person: In reference to Rows 5, 7 and 9 above, amount consists of Class A ordinary shares, $0.0001 par value ("Class A Shares"), of Siddhi Acquisition Corp, a blank check company formed under the laws of the Cayman Islands (the "Issuer"), held in the form of units, each consisting of one Class A Share and one right. Each right entitles the holder thereof to receive one-tenth of one Class A ordinary share. In reference to Row 11 above, percentage ownership is based on 27,938,000 Class A Shares issued and outstanding as of May 12, 2025, as reported on the Issuer's quarterly report on Form 10-Q for the quarter ended March 31, 2025, filed with the Securities and Exchange Commission on May 12, 2025.

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Siddhi Acquisition Corp
(b)	Address of issuer's principal executive offices: 100 Wall Street, 20th Floor, New York, NY 10005
Item 2.
(a)	Name of person filing: Healthcare of Ontario Pension Plan Trust Fund ("HOOPP")
(b)	Address or principal business office or, if none, residence: 1 York Street, Suite 1900, Toronto, Ontario, Canada, M5J 0B6
(c)	Citizenship: Ontario, Canada
(d)	Title of class of securities: Class A ordinary shares, $0.0001 par value
(e)	CUSIP No.: G8118C124
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).
	A pension plan formed as a trust under the laws of Ontario, Canada and registered with the Financial Services Regulatory Authority of Ontario.
Item 4.	Ownership
(a)	Amount beneficially owned: See Item 9 on page 2.
(b)	Percent of class: See Item 11 on page 2.
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: See Item 5 on page 2.
	(ii) Shared power to vote or to direct the vote: See Item 6 on page 2.
	(iii) Sole power to dispose or to direct the disposition of: See Item 7 on page 2.
	(iv) Shared power to dispose or to direct the disposition of: See Item 8 on page 2.
Item 5.	Ownership of 5 Percent or Less of a Class.
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 acquired and are held in the ordinary course of business and 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. By signing below I certify that, to the best of my knowledge and belief, the regulatory scheme applicable to a pension plan formed as a trust under the laws of Ontario, Canada and registered with the Financial Services Regulatory Authority of Ontario is substantially comparable to the regulatory scheme applicable to the functionally equivalent U.S. institution(s). I also undertake to furnish to the Securities and Exchange Commission staff, upon request, information that would otherwise be disclosed in a Schedule 13D.

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.

Healthcare of Ontario Pension Plan Trust Fund

Signature:	/s/ Abas Kanu
Name/Title:	VP, HOOPP Compliance Officer
Date:	08/13/2025

FAQ

How many Siddhi Acquisition Corp Class A shares does HOOPP report owning?

The filing states HOOPP beneficially owns 2,400,000 Class A shares.

What percentage of Siddhi Acquisition Corp's Class A shares does HOOPP own?

HOOPP's position represents 8.6% of the Class A shares outstanding based on the issuer's reported figure of 27,938,000 shares.

Was the ownership reported on a Schedule 13G or Schedule 13D?

The document is filed as a Schedule 13G, indicating passive reporting.

How are the holdings structured (units/rights)?

The shares are held in the form of units, each consisting of one Class A share and one right; each right entitles the holder to one-tenth of a Class A share.

Is HOOPP indicating intent to change or influence control of Siddhi Acquisition Corp?

No. The filing certifies the securities were acquired and are held in the ordinary course of business and not for the purpose of changing or influencing control of the issuer.