X0202 SCHEDULE 13D/A 0001193125-21-005201 0001373161 XXXXXXXX LIVE 3 Class A Common Stock 07/30/2026 false 0001793659 782011100 Rush Street Interactive, Inc.

900 N. Michigan Avenue, Suite 950 Chicago IL 60611

Neil G. Bluhm (312) 915-1086 Richard Schwartz 900 N. Michigan Avenue, Suite 950 Chicago IL 60611 0001373161 N BLUHM NEIL a OO N X1 100085274.00 0.00 100085274.00 0.00 100085274.00 N 46.5 IN The reported amount represents (i) 668,418 shares of Class A Common Stock, (ii) 99,289,627 shares of Class A Common Stock issuable upon conversion of RSILP Units (together with an equivalent number of shares of Class V Common Stock) and (iii) 127,229 shares of Class A Common Stock issuable upon conversion of stock options. The percent of class is calculated based on 115,626,347 shares of Class A Common Stock outstanding as of July 29, 2026 as reported in the Issuer's Form 10-Q filed on July 30, 2026, as increased by (i) 99,289,627 shares of Class A Common Stock issuable upon conversion of RSILP Units (together with an equivalent number of shares of Class V Common Stock) beneficially owned by the Bluhm Reporting Persons (as defined below) and (ii) 127,229 shares of Class A Common Stock issuable upon conversion of stock options beneficially owned by the Bluhm Reporting Persons. Y NGB 2016 REVOCABLE TRUST a OO N IL 2195752.00 0.00 2195752.00 0.00 2195752.00 N 1.0 OO The reported amount represents (i) 668,418 shares of Class A Common Stock and (ii) 1,527,334 shares of Class A Common Stock issuable upon conversion of RSILP Units (together with an equivalent number of shares of Class V Common Stock). The percent of class is calculated based on 115,626,347 shares of Class A Common Stock outstanding as of July 29, 2026 as reported in the Issuer's Form 10-Q filed on July 30, 2026, as increased by (i) 99,289,627 shares of Class A Common Stock issuable upon conversion of RSILP Units (together with an equivalent number of shares of Class V Common Stock) beneficially owned by the Bluhm Reporting Persons and (ii) 127,229 shares of Class A Common Stock issuable upon conversion of stock options beneficially owned by the Bluhm Reporting Persons. Y NGB 2013 Grandchildren's Dynasty Trust a OO N IL 96399630.00 0.00 96399630.00 0.00 96399630.00 N 44.8 OO The reported amount represents 96,399,630 shares of Class A Common Stock issuable upon conversion of RSILP Units (together with an equivalent number of shares of Class V Common Stock). The percent of class is calculated based on 115,626,347 shares of Class A Common Stock outstanding as of July 29, 2026 as reported in the Issuer's Form 10-Q filed on July 30, 2026, as increased by (i) 99,289,627 shares of Class A Common Stock issuable upon conversion of RSILP Units (together with an equivalent number of shares of Class V Common Stock) beneficially owned by the Bluhm Reporting Persons and (ii) 127,229 shares of Class A Common Stock issuable upon conversion of stock options beneficially owned by the Bluhm Reporting Persons. Y Rush Street Interactive GP, LLC a OO N IL 1362663.00 0.00 1362663.00 0.00 1362663.00 N 0.6 OO The reported amount represents 1,362,663 shares of Class A Common Stock issuable upon conversion of RSILP Units (together with an equivalent number of shares of Class V Common Stock). The percent of class is calculated based on 115,626,347 shares of Class A Common Stock outstanding as of July 29, 2026 as reported in the Issuer's Form 10-Q filed on July 30, 2026, as increased by (i) 99,289,627 shares of Class A Common Stock issuable upon conversion of RSILP Units (together with an equivalent number of shares of Class V Common Stock) beneficially owned by the Bluhm Reporting Persons and (ii) 127,229 shares of Class A Common Stock issuable upon conversion of stock options beneficially owned by the Bluhm Reporting Persons. Y Richard Schwartz a OO N X1 7292836.00 0.00 7292836.00 0.00 7292836.00 N 5.9 IN The reported amount represents (i) 6,101,187 shares of Class A Common Stock issuable upon conversion of RSILP Units (together with an equivalent number of shares of Class V Common Stock) and (ii) 1,191,649 shares of Class A Common Stock issuable upon conversion of stock options that have vested or will vest and be exercisable within 60 days. The percent of class is calculated based on 115,626,347 shares of Class A Common Stock outstanding as of July 29, 2026 as reported in the Issuer's Form 10-Q filed on July 30, 2026, as increased by 6,101,187 shares of Class A Common Stock issuable upon conversion of RSILP Units (together with an equivalent number of shares of Class V Common Stock) beneficially owned by the Reporting Person and 1,191,649 shares of Class A Common Stock issuable upon conversion of stock options beneficially owned by the Reporting Person. Class A Common Stock Rush Street Interactive, Inc. 900 N. Michigan Avenue, Suite 950 Chicago IL 60611 This Amendment relates to the Class A Common Stock, par value $0.0001 per share ("Class A Common Stock"), of Rush Street Interactive, Inc., a Delaware corporation (the "Issuer"). The address of the principal executive office of the Issuer is 900 N. Michigan Ave, Suite 950, Chicago, IL 60611. EXPLANATORY NOTE This Amendment No. 3 to Schedule 13D ("Amendment No. 3") amends and supplements, as set forth below, the Schedule 13D filed by certain of the Reporting Persons with respect to the Issuer on January 8, 2021, as amended by Amendment No. 1 filed on March 2, 2023 and Amendment No. 2 filed on May 7, 2026 (as amended, the "Schedule 13D"). The Schedule 13D is amended and supplemented by adding the information contained herein, and only those items amended are reported herein. Each capitalized term used but not defined herein has the meaning ascribed to such term in the Schedule 13D. Items 5(a)-(c) of the Schedule 13D are hereby amended and restated as follows and as set forth in subsections (a), (b) and (c) below: The responses of the Reporting Persons set forth in rows (11) and (13) of the cover pages and the comments to the cover pages of this Amendment No. 3 are incorporated by reference into this Item 5(a). The percent of class is calculated based on 115,626,347 shares of Class A Common Stock outstanding as of July 29, 2026 as reported in the Issuer's Form 10-Q filed on July 30, 2026, as increased by certain amounts of Class A Common Stock issuable upon conversion of RSILP Units (together with an equivalent number of shares of Class V Common Stock) or options beneficially owned by certain of the Reporting Persons, as applicable, as detailed in the comments to the cover pages. The previously disclosed percentages in the 13D calculated Class A Common Stock and Class V Common Stock as separate precents. However, this Amendment No. 3 corrects this approach and reports the percent of Class A Common Stock on an as diluted basis. The Revocable Trust is the direct beneficial owner of 668,418 shares of Class A Common Stock and 1,527,334 shares of Class A Common Stock issuable upon conversion of RSILP Units (together with an equivalent number of shares of Class V Common Stock). Neil G. Bluhm is the sole trustee and sole beneficiary of the Revocable Trust. The Dynasty Trust is the direct beneficial owner of 96,399,630 shares of Class A Common Stock issuable upon conversion of RSILP Units (together with an equivalent number of shares of Class V Common Stock). Neil G. Bluhm is a trustee of the Dynasty Trust. Rush Street Interactive GP is the direct beneficial owner of 1,362,663 shares of Class A Common Stock issuable upon conversion of RSILP Units (together with an equivalent number of shares of Class V Common Stock). Rush Street Interactive GP is managed by a board of managers consisting of Neil G. Bluhm, Andrew G. Bluhm, and Gregory A. Carlin. Neil G. Bluhm, through his control of over 81% of the units of Rush Street Interactive GP, possesses the ability to appoint the managers to the board of managers. As a result, Neil G. Bluhm may be deemed to possess indirect beneficial ownership of the shares of Class V Common Stock held by Rush Street Interactive GP. Neil G. Bluhm disclaims beneficial ownership of the securities held by the Rush Street Interactive GP. Neil Bluhm is the direct beneficial owner of 127,229 shares of Class A Common Stock issuable upon conversion of 127,229 stock options that have vested or will vest and be exercisable within 60 days. Neil Bluhm, together with The Revocable Trust, The Dynasty Trust and Rush Street Interactive GP are referred to herein as the "Bluhm Reporting Persons". Richard Schwartz is the direct beneficial owner of 6,101,187 Class A Common Stock issuable upon conversion of RSILP Units (together with an equivalent number of shares of Class V Common Stock) and 1,191,649 shares of Class A Common Stock issuable upon conversion of stock options that have vested. As described in Item 2 of Amendment No. 1, by virtue of Richard Schwartz, Neil G. Bluhm and the Dynasty Trust being a party to the Voting Agreement, such Reporting Persons may be deemed to be a member of a "group", as defined in Rule 13d-5 of the Exchange Act, and each of the Reporting Persons may be deemed to beneficially own the shares of Class V Common Stock and Class A Common Stock beneficially owned by each other solely for such purposes. Pursuant to Rule 13d-4 of the Act, the Reporting Persons declare that filing this statement shall not be deemed an admission that the Reporting Persons are the beneficial owners of the reported securities, for purposes of Section 13(d) and/or Section 13(g) or for any other purpose. The responses of the Reporting Persons set forth in rows (7) through (10) of the cover pages of this Amendment No. 3 and the information set forth in Item 5(a) hereof are incorporated by reference into this Item 5(b). On July 1, 2026, Richard Schwartz converted 158,334 RSILP Units (and an equivalent number of shares of Class V Common Stock) into 158,334 shares of Class A Common Stock and sold such shares in market transactions pursuant to a 10b5-1 plan at a weighted average price of $31.2148 per share. These shares were sold in multiple transactions at prices ranging from $29.95 to $31.66 per share. On August 3, 2026, Richard Schwartz converted 158,334 RSILP Units (and an equivalent number of shares of Class V Common Stock) into 158,334 shares of Class A Common Stock and sold such shares in market transactions pursuant to a 10b5-1 plan at a weighted average price of $28.0239 per share. These shares were sold in multiple transactions at prices ranging from $26.38 to $28.90 per share. Other than as set forth above, the Reporting Persons have not effected any other transactions in the Class A Common Stock in the prior 60 days. Exhibit I Joint Filing Agreement among the Reporting Persons (incorporated by reference to Exhibit I to the Schedule 13D/A filed by the Reporting Persons on March 2, 2023). BLUHM NEIL /s/ Kyle Sauers 08/03/2026 NGB 2016 REVOCABLE TRUST /s/ Kyle Sauers 08/03/2026 NGB 2013 Grandchildren's Dynasty Trust /s/ Kyle Sauers 08/03/2026 Rush Street Interactive GP, LLC /s/ Kyle Sauers 08/03/2026 Richard Schwartz /s/ Kyle Sauers 08/03/2026