[Form 4] StoneX Group Inc. Insider Trading Activity

Rhea-AI Filing Summary

On 4 Aug 2025 Diamond Hill Investment Group (NASDAQ: DHIL) filed an 8-K to update investors on assets under management (AUM) at subsidiary Diamond Hill Capital Management as of 31 Jul 2025. Firm-wide AUM totalled $30.2 billion.

AUM by vehicle: Diamond Hill Funds $19.4 billion (64%), separately managed accounts $5.5 billion (18%), collective investment trusts $1.4 billion (5%), and other pooled vehicles $3.8 billion (13%).

AUM by strategy: Large Cap $16.5 billion (55%) leads the mix, followed by Short Duration Securitized Bond $4.5 billion (15%), Long-Short equity $1.9 billion (6%) and Core Fixed Income $3.3 billion (11%). Smaller sleeves include Small-/Mid-Cap ($1.7 billion combined), Select ($0.8 billion) and International/Micro Cap ($0.2 billion).

No earnings, fee rate or YoY comparison was disclosed; the filing is strictly an Item 8.01 update on month-end AUM composition.

Insights

Buy-side Analyst

TL;DR: Filing is informational; $30.2bn AUM mix skews to Large Cap funds with no trend data, so market impact should be minimal.

The 8-K supplies a snapshot of July-end AUM, a key revenue driver for DHIL. Large Cap strategies remain the core at 55%, implying continued dependence on U.S. equity markets for fee generation. Fixed-income and securitized products now account for roughly 26%, providing some diversification. However, management provides no sequential or YoY figures, limiting investors’ ability to gauge organic flows or performance gains. Absent those metrics, the disclosure is neutral; it neither signals fee pressure nor growth acceleration. I view the update as routine and non-impactful to valuation near-term.

Asset Management Specialist

TL;DR: Routine monthly AUM disclosure; composition shows heavy mutual-fund concentration, suggesting fee sensitivity to retail flows.

With 64% of assets housed in proprietary funds, DHIL’s revenue mix is tilted toward higher-fee retail vehicles, which is positive if performance holds but exposes the firm to redemption risk during market drawdowns. Separately managed accounts and CITs form a modest institutional base at 23%. The large Large-Cap sleeve underscores benchmark risk to U.S. equities. Lack of comparative data leaves questions about net flows, but nothing here suggests a strategic shift. Overall, the event is informational, not transformative.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

KASS STEVEN A

(Last) (First) (Middle)

230 PARK AVENUE

10TH FLOOR

(Street)

NEW YORK NY 10169

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
StoneX Group Inc. [ SNEX ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
07/31/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Restricted Shares of Common Stock(1)	07/31/2025		A		139	A	$0	35,390	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Acquired through the Company's Restricted Stock Program. Shares vest equally on anniversary in years one, two and three.

Remarks:

	Steven A. Kass	08/01/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What is Diamond Hill Investment Group's total AUM as of 31 July 2025?

Total firm-wide assets under management are $30.2 billion.

How much of DHIL's AUM is in Diamond Hill mutual funds?

Mutual funds account for $19.4 billion, roughly 64% of total AUM.

Which investment strategy holds the largest share of AUM for DHIL?

The Large Cap strategy leads with $16.5 billion, or 55% of total assets.

What percentage of AUM is in fixed-income or securitized strategies?

Short Duration Securitized Bond ($4.5 bn) and Core Fixed Income ($3.3 bn) together represent about 26% of AUM.

Does the 8-K include earnings or fee rate information?

No. The filing only discloses month-end AUM; it omits earnings, fee rates, and comparative flow data.