National Philanthropic Trust (DMYY) exits dMY Squared as shares convert to Horizon

Rhea-AI Filing Summary

National Philanthropic Trust filed Amendment No. 1 to its Schedule 13D on dMY Squared Technology Group, Inc., reporting that it now beneficially owns 0 shares of the company’s Class A common stock, or 0.00% of the class.

The change follows a transaction on March 19, 2026 in which each outstanding dMY Squared Class A share was automatically converted into the right to receive one Horizon Quantum Holdings Ltd. Class A Share. Immediately after the deal, Horizon had 31,833,549 Class A Shares and 19,744,585 Class B Shares outstanding, and National Philanthropic Trust held 231,520 Horizon Class A Shares, which is less than 5% of that class. This amendment serves as an exit filing, and the trust has no further beneficial ownership reporting obligations for dMY Squared.

Key Figures

Beneficial ownership in dMY Squared: 0 shares Ownership percentage in dMY Squared: 0.00% Horizon Class A Shares outstanding: 31,833,549 shares +2 more

5 metrics

Beneficial ownership in dMY Squared 0 shares Class A common stock after Transaction

Ownership percentage in dMY Squared 0.00% Class A common stock after Transaction

Horizon Class A Shares outstanding 31,833,549 shares Immediately following Transaction on March 19, 2026

Horizon Class B Shares outstanding 19,744,585 shares Immediately following Transaction on March 19, 2026

Horizon Class A Shares held 231,520 shares Held by National Philanthropic Trust after Transaction

Key Terms

beneficially own, Schedule 13D, Form 15, deregistration, +1 more

5 terms

beneficially own financial

"After giving effect to this Transaction, the Reporting Person ceased to beneficially own 5% of the Class A Common Stock"

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 13D regulatory

"If the filing person has previously filed a statement on Schedule 13G to report the acquisition"

A Schedule 13D is a legal document that investors file with regulators when they buy a large enough stake in a company to potentially influence its management or decisions. It provides details about the investor’s intention, ownership stake, and plans, helping other investors understand who is gaining control and what their motives might be.

Form 15 regulatory

"the Issuer filed a Form 15 with the SEC to effect the deregistration of the Class A Common Stock"

A Form 15 is a short filing a public company uses with the U.S. Securities and Exchange Commission to stop or pause its routine public reporting requirements when it meets certain legal thresholds (such as a low number of public shareholders) or other qualifying conditions. Investors should care because filing one typically means less public financial information and lower trading liquidity—similar to a shop taking down its public notice board, making it harder to track performance and buy or sell shares.

deregistration regulatory

"filed a Form 15 with the SEC to effect the deregistration of the Class A Common Stock"

Deregistration is when a company officially removes itself from a stock exchange or regulatory list, meaning it is no longer publicly traded. This can happen if the company is shrinking or choosing to go private, and it matters because it changes how investors can buy or sell its shares.

donor-advised funds financial

"The Reporting Person is a sponsoring organization of donor-advised funds."

A donor-advised fund is a charitable “giving account” that lets a person or family give cash or securities to a fund, get an immediate tax benefit, and then recommend when and which charities receive grants over time. For investors this matters because it changes the timing and form of charitable selling or giving—donations can come from pooled, invested assets (including appreciated stock), which affects tax outcomes, liquidity and potential future flows of shares or cash to charities and the market.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 1)

dMY Squared Technology Group, Inc.

(Name of Issuer)

Class A common stock, par value $0.0001 per share

(Title of Class of Securities)

233276104

(CUSIP Number)

Christina Hack
Chief Financial Officer, 165 Township Line Road, Suite 1200
Jenkintown, PA, 19046
(215) 277-3010

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

03/19/2026

(Date of Event Which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.

The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

schemaVersion:

SCHEDULE 13D

CUSIP Number(s): 233276104

1

Name of reporting person

National Philanthropic Trust

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

OO

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

PENNSYLVANIA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 0.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 0.00

11

Aggregate amount beneficially owned by each reporting person

0.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

0.00 %

14

Type of Reporting Person (See Instructions)

CO

Comment for Type of Reporting Person:

This statement on Schedule 13D relates to the Series A common stock, par value $0.0001 per share ("Class A Common Stock"), of dMY Squared Technology Group, Inc. (the "Issuer"). The statement on Schedule 13D originally filed with the Securities and Exchange Commission (the "SEC") by the Reporting Person on September 15, 2025 (the "Schedule 13D") is hereby amended and supplemented to include the information set forth herein. This amended statement on Schedule 13D (the "Schedule 13 Amendment") constitutes Amendment No. 1 to the original Schedule 13D filing and constitutes an exit filing of the Reporting Person in respect of shares of Class A Common Stock. Following the transaction (the "Transaction") described in Item 4 below, the Issuer filed a Form 15 with the SEC to effect the deregistration of the Class A Common Stock. Except as set forth herein, the Schedule 13D is unmodified.

SCHEDULE 13D

Item 1.	Security and Issuer
(a)	Title of Class of Securities: Class A common stock, par value $0.0001 per share
(b)	Name of Issuer: dMY Squared Technology Group, Inc.
(c)	Address of Issuer's Principal Executive Offices: 1180 NORTH TOWN CENTER DRIVE SUITE 100, LAS VEGAS, NEVADA , 89144.
Item 2.	Identity and Background
(a)	This Schedule 13D Amendment is being filed by National Philanthropic Trust (the "Reporting Person").
(b)	The principal business address of the Reporting Person is 165 Township Line Road, Suite 1200, Jenkintown, Pennsylvania 19046.
(c)	The Reporting Person is a 501(c)(3) charitable organization that, along with its affiliates, accomplishes its and their charitable purposes through the encouragement and facilitation of charitable giving by receiving charitable contributions, by providing support and assistance to encourage charitable contributions, and by making grants for purposes in Section 501(c)(3) of the Internal Revenue Code. The Reporting Person is a sponsoring organization of donor-advised funds. The Reporting Person is a Pennsylvania non-profit, non-stock corporation.
(d)	During the past five years, the Reporting Person has not been convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors).
(e)	During the past five years, the Reporting Person has not been a party to any civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws.
Item 3.	Source and Amount of Funds or Other Consideration
	The information set forth in Item 4 of this Schedule 13D Amendment is hereby incorporated by reference into this Item 3.
Item 4.	Purpose of Transaction
	On March 19, 2026, Horizon Quantum Holdings Ltd., a Singapore public company limited by shares ("Horizon"), consummated the Transaction with dMY Squared Technology Group, Inc., a Massachusetts corporation (the "Issuer") and various other parties. As part of the Transaction, each outstanding share of Class A Common Stock of the Issuer (excluding any such shares which were redeemed as part of the Transaction) were automatically converted into the right to receive one Class A Share of Horizon (the "Horizon Class A Shares"). The Horizon Class A Shares were registered with the SEC on Form 8-A, effective March 19, 2025. Immediately following the Transaction, (i) there were 31,833,549 Horizon Class A Shares and 19,744,585 Horizon Class B Shares of Horizon issued and outstanding and (ii) the Reporting Person's entire holdings in Horizon securities consisted of 231,520 Horizon Class A Shares which shares it continues to hold as of the time of this Schedule 13D Amendment filing. The Reporting Person holds less than 5% of the Horizon Class A Shares and is not a Schedule 13D filer with regard to its holdings of Horizon Class A Shares.
Item 5.	Interest in Securities of the Issuer
(a)	The responses to Items 7-13 of the cover page to this Schedule 13D Amendment are incorporated herein by reference.
(b)	The response to Item 5(a) is incorporated herein by reference.
(c)	Except as described in this Schedule 13D Amendment, there have been no transactions effected by the Reporting Person with respect to the Issuer's Class A common stock that were effected during the past sixty (60) days.
(d)	Not applicable.
(e)	After giving effect to this Transaction, the Reporting Person ceased to beneficially own 5% of the Class A Common Stock and has no further beneficial ownership reporting obligations.

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.

National Philanthropic Trust

Signature:	/s/ Christina Hack
Name/Title:	Christina Hack, Chief Financial Officer
Date:	05/19/2026

FAQ

What does National Philanthropic Trust’s Schedule 13D/A say about its DMYY holdings?

National Philanthropic Trust reports it no longer owns any dMY Squared Class A shares. The amendment shows beneficial ownership of 0 shares, or 0.00% of the class, and functions as an exit filing after a share-for-share transaction with Horizon Quantum Holdings.

How did the Horizon Quantum transaction affect DMYY (DMYY) shareholders?

Each outstanding dMY Squared Class A share was converted into one Horizon Quantum Class A Share. This one-for-one conversion occurred in a transaction completed on March 19, 2026, moving former dMY Squared investors into Horizon Quantum Holdings’ capital structure.

What Horizon Quantum stake does National Philanthropic Trust hold after exiting DMYY?

National Philanthropic Trust holds 231,520 Horizon Quantum Class A Shares. Immediately following the transaction, Horizon had 31,833,549 Class A Shares outstanding, so the trust’s position represents less than 5% of that class and no longer triggers 5% reporting thresholds.

Why did National Philanthropic Trust file this Schedule 13D amendment for DMYY?

The amendment updates ownership after a corporate transaction and confirms an exit position. Following the Horizon Quantum deal and resulting share conversion, the trust’s beneficial ownership in dMY Squared became 0 shares, eliminating further beneficial ownership reporting duties for that issuer.

What deregistration step did dMY Squared take after the Horizon Quantum deal?

dMY Squared filed a Form 15 to deregister its Class A common stock. This filing came after the share conversion into Horizon Quantum Class A Shares, reflecting that dMY Squared’s Class A shares would no longer remain registered with the SEC.