Stone reports 14.3% stake in SS&C Technologies (SSNC)

Rhea-AI Filing Summary

SS&C Technologies Holdings, Inc. received an updated ownership report from its Chief Executive Officer, William C. Stone, covering his holdings as of December 31, 2025. He is reported to beneficially own 35,202,277 shares of common stock, representing 14.3% of the outstanding class.

This total includes 32,447,241 shares outstanding plus an additional 2,775,036 shares tied to restricted stock units and stock options that were vested as of December 31, 2025 or within 60 days after that date. Stone is listed as having sole voting and dispositive power over all of these shares, with no shared voting or disposition authority.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 12)

SS&C Technologies Holdings, Inc.

(Name of Issuer)

Common Stock, par value $0.01 per share

(Title of Class of Securities)

78467J100

(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. 78467J100

1

Names of Reporting Persons

William C. Stone

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

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 35,202,277.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 35,202,277.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

35,202,277.00

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)

14.3 %

12

Type of Reporting Person (See Instructions)

IN

SCHEDULE 13G

Item 1.
(a)	Name of issuer: SS&C Technologies Holdings, Inc.
(b)	Address of issuer's principal executive offices: 80 Lamberton Road, Windsor, Connecticut 06095
Item 2.
(a)	Name of person filing: William C. Stone
(b)	Address or principal business office or, if none, residence: c/o SS&C Technologies Holdings, Inc., 80 Lamberton Road, Windsor, Connecticut 06095
(c)	Citizenship: United States of America
(d)	Title of class of securities: Common Stock, par value $0.01 per share
(e)	CUSIP No.: 78467J100
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).
Item 4.	Ownership
(a)	Amount beneficially owned: 35,202,277 shares of Common Stock (consisting of 32,447,241 shares outstanding and an additional 2,775,036 shares representing RSUs and options to purchase shares vested as of December 31, 2025 and within 60 days thereafter).
(b)	Percent of class: 14.3 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 35,202,277 shares of Common Stock
	(ii) Shared power to vote or to direct the vote: 0 shares
	(iii) Sole power to dispose or to direct the disposition of: 35,202,277 shares of Common Stock
	(iv) Shared power to dispose or to direct the disposition of: 0 shares
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:
	Not Applicable

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.

William C. Stone

Signature:	/William C. Stone/
Name/Title:	Chief Executive Officer
Date:	02/09/2026

FAQ

What percentage of SSNC does William C. Stone report owning in this Schedule 13G/A?

William C. Stone reports beneficial ownership of 14.3% of SS&C Technologies Holdings, Inc. common stock. This percentage is based on 35,202,277 shares he is deemed to beneficially own as of December 31, 2025, including vested RSUs and options.

How many SSNC shares does William C. Stone beneficially own according to this filing?

He beneficially owns 35,202,277 shares of SS&C Technologies Holdings, Inc. common stock. This figure combines 32,447,241 shares already outstanding with 2,775,036 shares underlying restricted stock units and stock options vested as of late 2025 or within 60 days thereafter.

What portion of William C. Stone’s SSNC ownership comes from RSUs and options?

The filing states that 2,775,036 shares of his beneficial ownership relate to RSUs and stock options. These are awards that were vested as of December 31, 2025 or within 60 days afterward, and are counted toward his total beneficial share position.

Does William C. Stone share voting or dispositive power over SSNC shares?

No. The report shows he has sole voting power and sole dispositive power over 35,202,277 shares of SS&C Technologies common stock. It lists 0 shares for shared voting power and 0 shares for shared dispositive power in this ownership breakdown.

What class of SSNC securities is covered by this Schedule 13G/A amendment?

The filing covers Common Stock of SS&C Technologies Holdings, Inc., with a par value of $0.01 per share. It identifies this class by CUSIP number 78467J100, and all reported beneficial holdings and percentages relate specifically to this common stock class.

Who is the reporting person in SSNC’s Schedule 13G/A and what is his role?

The reporting person is William C. Stone, a United States citizen. He signs the statement as Chief Executive Officer of SS&C Technologies Holdings, Inc., certifying that the ownership information provided regarding his common stock holdings is true, complete, and correct.