HOOPP reports 4.2% stake in Highview Merger Corp.

Healthcare of Ontario Pension Plan Trust Fund filed an amended Schedule 13G reporting beneficial ownership of 1,000,000 Class A ordinary shares of Highview Merger Corp., equal to 4.2% of the class.

Rhea-AI Filing Summary

Healthcare of Ontario Pension Plan Trust Fund filed an amended Schedule 13G reporting beneficial ownership of 1,000,000 Class A ordinary shares of Highview Merger Corp., equal to 4.2% of the class. This percentage is based on 23,660,000 Class A shares outstanding as of November 13, 2025.

HOOPP reports sole voting and dispositive power over all 1,000,000 shares and no shared power. It states the shares were acquired and are held in the ordinary course of business, not to change or influence control of Highview Merger Corp.

FAQ

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

What ownership stake in Highview Merger Corp. (HVMC) does HOOPP report?

Healthcare of Ontario Pension Plan Trust Fund reports beneficial ownership of 1,000,000 Class A ordinary shares of Highview Merger Corp. This equals 4.2% of the outstanding Class A shares, based on 23,660,000 shares reported outstanding as of November 13, 2025.

How is HOOPPs 4.2% ownership in HVMC calculated?

The 4.2% figure is based on 23,660,000 Class A shares issued and outstanding as of November 13, 2025. That share count comes from Highview Merger Corp.s Form 10-Q for the quarter ended September 30, 2025, which HOOPP cites in the filing.

Does HOOPP have control-related intentions regarding Highview Merger Corp. (HVMC)?

HOOPP certifies the HVMC shares were acquired and are held in the ordinary course of business. It specifically states they were not acquired and are not held for the purpose of changing or influencing control of Highview Merger Corp., nor as part of any control-related transaction.

What voting and dispositive powers does HOOPP report over HVMC shares?

HOOPP reports sole voting power over 1,000,000 shares and sole dispositive power over the same 1,000,000 shares. It reports zero shared voting power and zero shared dispositive power, indicating exclusive authority over how these shares are voted and disposed of.

What type of investor is HOOPP in the Highview Merger Corp. filing?

HOOPP is described as a pension plan formed as a trust under the laws of Ontario, Canada, registered with the Financial Services Regulatory Authority of Ontario. It also certifies that its regulatory regime is substantially comparable to that of functionally equivalent U.S. institutions.

Why is this Schedule 13G/A filing for HVMC classified as 5 percent or less ownership?

Item 5 notes ownership of 5 percent or less of a class. With HOOPPs stake at 4.2% of Class A shares, it falls below the 5% threshold. This level generally reflects a significant but non-controlling, passive institutional investment position.

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

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Accepted by SEC EDGAR 02/13/2026 - 04:00 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

Highview Merger Corp.

(Name of Issuer)

Class A Ordinary Shares, $0.0001 par value

(Title of Class of Securities)

G4569C101

(CUSIP Number)

12/31/2025

(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. G4569C101

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 1,000,000.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 1,000,000.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,000,000.00

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)

4.2 %

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 Highview Merger Corp., a blank check company formed under the laws of the Cayman Islands (the "Issuer"). In reference to Row 11 above, percentage ownership is based on 23,660,000 Class A Shares issued and outstanding as of November 13, 2025, as reported on the Issuer's quarterly report on Form 10-Q for the quarter ended on September 30, 2025, filed with the Securities and Exchange Commission on November 13, 2025.

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Highview Merger Corp.
(b)	Address of issuer's principal executive offices: 1615 South Congress Ave., Suite 103, Delray Beach, Florida 33445
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.: G4569C101
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.
	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:	Abas Kanu, VP, HOOPP Compliance Officer
Date:	02/13/2026