[Form 4] Rush Street Interactive, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Director Niccolo de Masi of Rush Street Interactive executed significant stock sales through a pre-planned 10b5-1 trading plan dated March 14, 2025. The transactions occurred in two batches:

• On June 18, 2025: Disposed of 286,769 shares at a weighted average price of $14.0833 per share (range: $13.86-$14.15)
• On June 20, 2025: Sold additional 29,696 shares at a weighted average price of $13.8977 per share (range: $13.84-$14.27)

Following these transactions, de Masi maintains 892,188 shares indirectly through Isalea Investments LP, where he serves as Managing Member, and 15,203 shares directly. The indirect holdings are subject to a beneficial ownership disclaimer. These sales were executed according to a predetermined trading plan, demonstrating compliance with insider trading regulations.

Positive

• None.

Negative

• Director Niccolo de Masi sold a total of 316,465 shares worth approximately $4.4M through a 10b5-1 planned sale, with weighted average prices between $13.84-$14.27 per share

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).

X

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^*

de Masi Niccolo

(Last) (First) (Middle)

C/O RUSH STREET INTERACTIVE

900 N. MICHIGAN AVENUE, SUITE 950

(Street)

CHICAGO IL 60611

(City) (State) (Zip)

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

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)
06/18/2025

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
Class A Common Stock	06/18/2025		S(1)		286,769	D	$14.0833(2)	921,884	I	See Footnote(3)
Class A Common Stock	06/20/2025		S(1)		29,696	D	$13.8977(4)	892,188	I	See Footnote(3)
Class A Common Stock								15,203	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. Shares were sold pursuant to a 10b5-1 Plan dated March 14, 2025.

2. The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $13.86 to $14.15 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.

3. These shares are held directly by Isalea Investments LP, of which the Reporting Person is the Managing Member. The Reporting Person may be deemed to have beneficial ownership of the shares held directly by Isalea Investments LP. The Reporting Person disclaims beneficial ownership of such shares, and this Form 4 shall not be deemed an admission that the Reporting Person is the beneficial owner of the shares for purposes of Section 16 or for any other purpose.

4. The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $13.84 to $14.27 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	06/20/2025
	** 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

How many RSI shares did Niccolo de Masi sell in June 2025?

Niccolo de Masi sold a total of 316,465 shares of RSI Class A Common Stock across two transactions: 286,769 shares on June 18, 2025, and 29,696 shares on June 20, 2025.

What was the selling price of RSI shares in de Masi's June 18, 2025 transaction?

The shares were sold at a weighted average price of $14.0833 per share, with individual transactions ranging from $13.86 to $14.15 per share.

How many RSI shares does Niccolo de Masi still own after these transactions?

After the transactions, de Masi owns 15,203 shares directly and 892,188 shares indirectly through Isalea Investments LP, where he serves as Managing Member.

Were RSI insider trades part of a planned transaction?

Yes, the shares were sold pursuant to a Rule 10b5-1 Plan dated March 14, 2025, which is a pre-planned trading arrangement designed to comply with insider trading regulations.

What is Niccolo de Masi's relationship to Rush Street Interactive (RSI)?

Niccolo de Masi serves as a Director of Rush Street Interactive, Inc. (RSI), as indicated in Section 5 of the Form 4 filing.