STETZ MATTIAS (Chief Operating Officer) sold 7.8% of their position (20K shares) of RUSH STREET INTERACTIVE, INC. on the open market

Open‑market sale worth $561.9K — a moderate reduction. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 1 sale

STETZ MATTIAS

Filed: 5/1/2026ACC: 0001835040-26-000019

InsiderSTETZ MATTIASCIK 1835040

→

IssuerRUSH STREET INTERACTIVE, INC.CIK 1793659

Officer· Chief Operating Officer

Since Dec 2020

-40K

Net shares

Net seller

$561.9K

Total sold

Open market trades

0B · 1S

Total transactions

20K acquired · 60K disposed

Non-Derivative Transactions3

Class A Common Stock

Direct

C · Conversion

+20K

Price / share

—

Trade value

—

% of position

8.4%

5/1/2026

237.87K→257.87K

Class V Voting Stock

Direct

D · Disposition

−20K

Price / share

—

Trade value

—

% of position

4.1%

5/1/2026

482.08K→462.08K

Class A Common Stock

Direct

S · Sale

−20K

Price / share

$28.09

Trade value

$561.88K

% of position

7.8%

5/1/2026

257.87K→237.87K

Total

Net shares

−20K

Net value

-$561.88K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Class A Common Stock Direct	5/1/2026	C · Conversion	+20K	—	—	8.4%	237.87K	257.87K
Class V Voting Stock Direct	5/1/2026	D · Disposition	−20K	—	—	4.1%	482.08K	462.08K
Class A Common Stock Direct	5/1/2026	S · Sale	−20K	$28.09	$561.88K	7.8%	257.87K	237.87K
Total			−20K		-$561.88K

Derivative Transactions1

Class A Common Units of Rush Street Interactive, L.P.

Direct

C · Conversion

Converts to

Class A Common Stock

20K shares

−20K

Strike price

Held after

462.08K

Exercisable

—

5/1/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Class A Common Units of Rush Street Interactive, L.P. Direct	Class A Common Stock20K shares	5/1/2026	C · Conversion	−20K		—	462.08K

Non-Derivative Holdings (Post-Transaction)2

Class V Voting Stock

Indirect

Shares owned850K

Class A Common Stock

Indirect

Shares owned105.45K

Total

955.45K indirect955.45K

Security Title	Shares Owned	Ownership Type
Class V Voting Stock	850K	Indirect
Class A Common Stock	105.45K	Indirect
Total	955.45K	955.45K indirect

Derivative Holdings (Post-Transaction)1

Class A Common Units of Rush Street Interactive, L.P.

Indirect

Underlying security

Class A Common Stock

Underlying shares

850K

Shares owned

850K

Exercise price

Expiration

—

Exercise window

—

Total

Underlying

850K

Owned

850K

Security	Underlying	Exercise Price	Exercise Window	Expiration	Underlying Shares	Shares Owned
Class A Common Units of Rush Street Interactive, L.P. Indirect	Class A Common Stock		—	—	850K	850K
Total					850K	850K