What is the overall net share change in the RSI insider’s position from this Form 4?

The transactions reported include a sale of 20,000 shares and one holding entry, resulting in a net reported buy/sell activity of 20,000 shares sold, according to the transaction summary included with the filing.

Rush Street Interactive COO sells 20K shares

Q: Was the RSI insider sale by the Chief Operating Officer under a Rule 10b5-1 plan?

Yes. The filing states that the 20,000 shares were sold pursuant to a Rule 10b5-1 trading plan, and the Rule 10b5-1 checkbox for the filing is affirmed, indicating the trades were pre-arranged under that plan.

Q: What price did the RSI shares sell for in the COO’s September 1, 2026 transaction?

The reported price is a weighted average sale price of $25.68 per share. The filing explains that the shares were sold in multiple transactions at prices ranging from $25.195 to $26.23 per share.

Q: What are the indirect RSI holdings reported for the Chief Operating Officer’s spouse?

The filing reports an indirect holding of 105,448 shares of Rush Street Interactive Class A common stock, held by spouse. This is presented as a separate indirect ownership position in addition to the Chief Operating Officer’s direct holdings.

Rush Street Interactive’s chief operating officer reported a 20,000-share planned sale and continues to hold substantial direct and spousal indirect positions.

Filing Impact

(Moderate)

Filing Sentiment

(Negative)

Form Type

Rhea-AI Filing Summary

Rush Street Interactive, Inc. (RSI) reports that Chief Operating Officer Mattias Stetz sold 20,000 shares of Class A common stock on September 1, 2026, in an open-market or private transaction under a Rule 10b5-1 trading plan. The weighted average sale price was $25.68 per share, based on multiple trades between $25.195 and $26.23 per share. Following this transaction, he held 157,874 shares directly and an additional 105,448 shares indirectly through his spouse.

Insider Trade Summary 10b5-1

Net Seller: 20,000 shares

Net Sell 2 txns

Insider STETZ MATTIAS

Role Chief Operating Officer

Sold 20,000 shs ($514K)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock ^{F1, F2}	20,000	$25.68	$514K
holding	Class A Common Stock	--	--	--

Holdings After Transaction: Class A Common Stock — 157,874 shares (Direct); Class A Common Stock — 105,448 shares (Indirect, By Spouse)

Footnotes (2)

F1. Shares were sold pursuant to a 10b5-1 plan.
F2. The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $25.195 to $26.23 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Key Figures

Shares sold: 20,000 shares Weighted average sale price: $25.68 per share Sale price range: $25.195 to $26.23 per share +3 more

6 metrics

Shares sold 20,000 shares Class A common stock sold by the Chief Operating Officer on September 1, 2026

Weighted average sale price $25.68 per share Weighted average price for the 20,000 shares sold on September 1, 2026

Sale price range $25.195 to $26.23 per share Range of prices across multiple transactions making up the reported sale

Direct holdings after sale 157,874 shares Direct Class A common stock held by the Chief Operating Officer after the transaction

Indirect spousal holdings 105,448 shares Class A common stock held indirectly through the Chief Operating Officer’s spouse

Net reported buy/sell activity 20,000 shares sold Net share change across reported buy and sell transactions in this filing

Key Terms

Rule 10b5-1 plan, weighted average sale price, indirect ownership

3 terms

Rule 10b5-1 plan regulatory

"Shares were sold pursuant to a 10b5-1 plan."

A Rule 10b5-1 plan is a prearranged, written schedule that lets corporate insiders buy or sell company stock at set times or amounts, even if they later learn material nonpublic information. Think of it like setting an automatic thermostat for trades: it creates a clear record that trades were planned in advance, reducing the risk of insider-trading accusations and helping investors trust that insider transactions are routine rather than based on secret information.

weighted average sale price financial

"The reported price in Column 4 is a weighted average sale price."

indirect ownership financial

"An additional indirect position is reported as held by spouse."

FAQ

What insider transaction did RSI’s Chief Operating Officer report on this Form 4?

The Chief Operating Officer, Mattias Stetz, reported selling 20,000 shares of Rush Street Interactive Class A common stock on September 1, 2026, in an open-market or private transaction, at a weighted average price of $25.68 per share.

Was the RSI insider sale by the Chief Operating Officer under a Rule 10b5-1 plan?

Yes. The filing states that the 20,000 shares were sold pursuant to a Rule 10b5-1 trading plan, and the Rule 10b5-1 checkbox for the filing is affirmed, indicating the trades were pre-arranged under that plan.

What price did the RSI shares sell for in the COO’s September 1, 2026 transaction?

The reported price is a weighted average sale price of $25.68 per share. The filing explains that the shares were sold in multiple transactions at prices ranging from $25.195 to $26.23 per share.

How many RSI shares does the Chief Operating Officer hold directly after this Form 4 sale?

After the reported sale, Chief Operating Officer Mattias Stetz directly holds 157,874 shares of Rush Street Interactive Class A common stock, as reflected in the post-transaction holdings line for his direct ownership.

What are the indirect RSI holdings reported for the Chief Operating Officer’s spouse?

The filing reports an indirect holding of 105,448 shares of Rush Street Interactive Class A common stock, held by spouse. This is presented as a separate indirect ownership position in addition to the Chief Operating Officer’s direct holdings.

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Available on EDGAR 09/03/2026 - 05:59 PM Accepted by SEC EDGAR 09/03/2026 - 05:57 PM

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^*

STETZ MATTIAS

(Last)

(First)

(Middle)

C/O RUSH STREET INTERACTIVE, INC.

900 N. MICHIGAN AVENUE, SUITE 950

(Street)

CHICAGO

ILLINOIS

60611

(City)

(State)

(Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Rush Street Interactive, Inc. [ RSI ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/01/2026

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

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

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

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Class A Common Stock	09/01/2026		S⁽¹⁾		20,000	D	$25.68⁽²⁾	157,874	D
Class A Common Stock								105,448	I	By Spouse

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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

1. Shares were sold pursuant to a 10b5-1 plan.

2. The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $25.195 to $26.23 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Remarks:

	/s/ Kyle Sauers as Attorney-in-fact	09/03/2026
	** 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.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR