Polar Asset (SSAC) reports 1.49M Class A shares, 8.2% stake

Rhea-AI Filing Summary

SPACSphere Acquisition Corp: Polar Asset Management Partners Inc. reports beneficial ownership of 1,490,000 Class A ordinary shares, representing 8.2% of the class as reported for the period ending 03/31/2026. The statement is filed on Schedule 13G and signed on 05/15/2026.

Insights

Institutional Ownership Analyst

Large passive stake disclosed: 1.49M shares (8.2%).

Polar Asset Management Partners Inc. is reported as beneficially owning 1,490,000 Class A shares with sole voting and dispositive power per the filing dated 03/31/2026. The filing identifies the holder as an investment adviser to a Cayman Islands fund.

Holding scale may affect shareholder composition; any trading plans, intentions, or cash‑flow treatment are not stated in the excerpt.

Governance & Compliance Specialist

Disclosure filed under Schedule 13G; reporting appears as passive/sectioned ownership.

The submission lists CUSIP G8T088109 and shows sole power to vote and dispose of 1,490,000 shares. The report is signed by the Chief Compliance Officer on 05/15/2026.

Qualifiers such as whether this is passive or active investor status are inherent to the Schedule 13G filing type; the excerpt provides no further strategic detail.

Key Figures

Beneficially owned shares: 1,490,000 shares Percent of class: 8.2% Sole voting power: 1,490,000 shares +4 more

7 metrics

Beneficially owned shares 1,490,000 shares Amount beneficially owned as reported

Percent of class 8.2% Percent of Class A ordinary shares

Sole voting power 1,490,000 shares Sole power to vote or direct the vote

Sole dispositive power 1,490,000 shares Sole power to dispose or direct the disposition

CUSIP G8T088109 Class A ordinary shares identifier

Reporting period date 03/31/2026 Period covered in the filing

Signature date 05/15/2026 Date signed by Chief Compliance Officer

Key Terms

Schedule 13G, Beneficial ownership, Sole Dispositive Power, CUSIP

4 terms

Schedule 13G regulatory

"This statement is filed by Polar Asset Management Partners Inc."

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.

Beneficial ownership regulatory

"Amount beneficially owned: 1490000"

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.

Sole Dispositive Power regulatory

"Sole power to dispose or to direct the disposition of: 1490000"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

CUSIP technical

"CUSIP Number(s): G8T088109"

A CUSIP is a nine-character alphanumeric code that uniquely identifies a U.S. or Canadian financial security—such as a stock, bond, or fund share—like a Social Security number for an investment. It matters to investors because brokers, exchanges and record-keepers use the CUSIP to match trades, track ownership, settle transactions and pull accurate records, reducing errors and ensuring money and securities go to the right place.

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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

SPACSphere Acquisition Corp

(Name of Issuer)

Class A ordinary shares, par value $0.0001 per share

(Title of Class of Securities)

G8T088109

(CUSIP Number)

03/31/2026

(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): G8T088109

1

Names of Reporting Persons

Polar Asset Management Partners Inc.

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 1,490,000.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 1,490,000.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,490,000.00

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)

8.2 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: SPACSphere Acquisition Corp
(b)	Address of issuer's principal executive offices: 8795 Folsom Blvd Sacramento, California, 95826
Item 2.
(a)	Name of person filing: This statement is filed by Polar Asset Management Partners Inc., a company incorporated under the laws of Ontario, Canada, which serves as the investment advisor to Polar Multi-Strategy Master Fund, a Cayman Islands exempted company ("PMSMF") with respect to the shares directly held by PMSMF.
(b)	Address or principal business office or, if none, residence: 16 York Street, Suite 2900, Toronto, Ontario, M5J 0E6
(c)	Citizenship: Canada
(d)	Title of class of securities: Class A ordinary shares, par value $0.0001 per share
(e)	CUSIP Number(s): G8T088109
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).
	The Reporting Person is an investment fund manager, portfolio manager, exempt market dealer and commodity trading manager registered with the Ontario Securities Commission.
Item 4.	Ownership
(a)	Amount beneficially owned: 1490000
(b)	Percent of class: 8.2 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 1490000
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 1490000
	(iv) Shared power to dispose or to direct the disposition of: 0
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.
	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.

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.

Polar Asset Management Partners Inc.

Signature:	Andrew Ma
Name/Title:	Chief Compliance Officer
Date:	05/15/2026

FAQ

What stake does Polar Asset report in SPACSphere (SSAC)?

Polar Asset reports beneficial ownership of 1,490,000 Class A shares, representing 8.2% of the Class A ordinary shares as of 03/31/2026, per the Schedule 13G excerpt.

Who holds the reported shares on behalf of Polar Asset in SSAC?

The filing states the shares are directly held by Polar Multi-Strategy Master Fund (PMSMF), for which Polar Asset Management Partners Inc. is the investment adviser, according to the Schedule 13G text.

What voting and disposition powers are disclosed for Polar Asset in SSAC?

The report shows sole voting power of 1,490,000 shares and sole dispositive power of 1,490,000 shares, with no shared voting or dispositive power listed in the excerpt.

What dates are relevant in the Schedule 13G for SSAC?

The filing indicates the reporting period date 03/31/2026 and the signature date of the report as 05/15/2026, both shown explicitly in the provided excerpt.