If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).




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SCHEDULE 13D




Comment for Type of Reporting Person:
Rows 8, 10 and 11: Consists of (i) 151,561,831 shares of Class V-3 common stock held of record by The RBC Millennium Trust, for which the Reporting Person serves as co-trustee with Janet L. Cohen and Joseph P. Toce, Jr., and may be deemed to have shared voting and investment power therein, (ii) 520,835 shares of Class V-1 common stock and 13,858,144 shares of Class V-3 common stock held of record by The Tilia Mill Trust (formerly the Jill Cohen Mill Trust), for which the Reporting Person serves as co-trustee with Janet L. Cohen, and may be deemed to have shared voting and investment power therein, (iii) 375,378 shares of Class V-1 common stock and 10,615,154 shares of Class V-3 common stock held of record by The Serenade QSST Trust (formerly The 2014 QSST F/B/O Rachel Kanter), for which the Reporting Person serves as trustee, (v) 2,500 shares of Class A common stock held of record by Ladensohn Family Investments, Ltd., of which the Reporting Person is a general partner and may be deemed to have shared voting and investment power therein; and (vi) 3,000 shares of Class A common stock held by of record by David A. Ladensohn Roth IRA, over which the Reporting Person exercises investment and dispositive power. Shares of Class V-3 common stock entitles its holders to 3 votes per share and are convertible on a one-for-one basis into shares of Class A common stock of the Issuer at the election of the holder and upon the redemption of an equal number of OpCo Units (as described in Item 3 herein). Shares of Class V-1 common stock entitles its holders to 1 vote per share and are convertible on a one-for-one basis into shares of Class A common stock of the Issuer at the election of the holder and upon the redemption of an equal number of OpCo Units (as described in Item 3 herein). Row 13: Based on information about outstanding shares as of May 4, 2026 disclosed in the Issuer's Quarterly Report on Form 10-Q filed with the U.S. Securities and Exchange Commission on May 6, 2026. The percent of class assumes conversion of all of the Reporting Person's Class V-1 common stock and Class V-3 common stock into Class A common stock, resulting in a total of 304,153,253 shares of Class A common stock outstanding (which reflects the sum of (x) 127,215,411 shares of Class A common stock outstanding as of May 4, 2026, (y) 896,213 shares of Class A common stock issuable upon conversion of the Reporting Person's Class V-1 common stock and (z) 176,035,129 shares of Class A common stock issuable on conversion of the Reporting Person's Class V-3 common stock). Based on the total of 602,706,815 shares of the Issuer's common stock outstanding as of May 4, 2026 (including (i) 127,215,411 shares of Class A common stock, (ii) 71,932,208 shares of Class V-1 common stock, and (iii) 403,559,196 shares of Class V-3 common stock), the Reporting Person beneficially owns 29.2% of the Issuer's total outstanding Class A common stock on a fully diluted basis as of May 4, 2026.


SCHEDULE 13D




Comment for Type of Reporting Person:
Rows 7, 9 and 11: Consists of 151,561,831 shares of Class V-3 common stock held of record by The RBC Millennium Trust, for which the Reporting Person serves as co-trustee with Janet L. Cohen and Joseph P. Toce, Jr., and may be deemed to have shared voting and investment power therein. Shares of Class V-3 common stock entitles its holders to 3 votes per share and are convertible on a one-for-one basis into shares of Class A common stock of the Issuer at the election of the holder and upon the redemption of an equal number of OpCo Units (as defined herein). Row 13: Based on information about outstanding shares as of May 4, 2026 disclosed in the Issuer's Quarterly Report on Form 10-Q filed with the U.S. Securities and Exchange Commission on May 6, 2026. The percent of class assumes conversion of all of the Reporting Person's Class V-3 common stock into Class A common stock, resulting in a total of 278,777,242 shares of Class A common stock outstanding (which reflects the sum of (x) 127,215,411 shares of Class A common stock outstanding as of May 4, 2026 and (y) 151,561,831 shares of Class A common stock issuable on conversion of the Reporting Person's Class V-3 common stock). Based on the total of 602,706,815 shares of the Issuer's common stock outstanding as of May 4, 2026 (including (i) 127,215,411 shares of Class A common stock, (ii) 71,932,208 shares of Class V-1 common stock, and (iii) 403,559,196 shares of Class V-3 common stock), the Reporting Person beneficially owns 25.1% of the Issuer's total outstanding Class A common stock on a fully diluted basis as of May 4, 2026.


SCHEDULE 13D




Comment for Type of Reporting Person:
Rows 7, 9 and 11: Consists of 520,835 shares of Class V-1 common stock and 13,858,144 shares of Class V-3 common stock held of record by The Tilia Mill Trust. Shares of Class V-1 common stock entitles its holders to 1 vote per share and shares of Class V-3 common stock entitles its holders to 3 votes per share, and both classes of common stock are convertible on a one-for-one basis into shares of Class A common stock of the Issuer at the election of the holder and upon the redemption of an equal number of OpCo Units (as defined herein). Row 13: Based on information about outstanding shares as of May 4, 2026 disclosed in the Issuer's Quarterly Report on Form 10-Q filed with the U.S. Securities and Exchange Commission on May 6, 2026. The percent of class assumes conversion of all of the Reporting Person's Class V-1 common stock and Class V-3 common stock into Class A common stock, resulting in a total of 141,594,390 shares of Class A common stock outstanding (which reflects the sum of (x) 127,215,411 shares of Class A common stock outstanding as of May 4, 2026, (y) 520,835 shares of Class A common stock issuable on conversion of the Reporting Person's Class V-1 common stsock, and (z) 13,858,144 shares of Class A common stock issuable on conversion of the Reporting Person's V-3 common stock). Based on the total of 602,706,815 shares of the Issuer's common stock outstanding as of May 4, 2026 (including (i) 127,215,411 shares of Class A common stock, (ii) 71,932,208 shares of Class V-1 common stock, and (iii) 403,559,196 shares of Class V-3 common stock), the Reporting Person beneficially owns 2.3% of the Issuer's total outstanding Class A common stock on a fully diluted basis as of May 4, 2026.


SCHEDULE 13D




Comment for Type of Reporting Person:
Rows 7, 9 and 11: Consists of 375,378 shares of Class V-1 common stock and 10,615,154 shares of Class V-3 common stock held of record by The Serenade QSST Trust. Shares of Class V-1 common stock entitles its holders to 1 vote per share and shares of Class V-3 common stock entitles its holders to 3 votes per share, and both classes of common stock are convertible on a one-for-one basis into shares of Class A common stock of the Issuer at the election of the holder and upon the redemption of an equal number of OpCo Units (as defined herein). Row 13: Based on information about outstanding shares as of May 4, 2026 disclosed in the Issuer's Quarterly Report on Form 10-Q filed with the U.S. Securities and Exchange Commission on May 6, 2026. The percent of class assumes conversion of all of the Reporting Person's Class V-1 common stock and Class V-3 common stock into Class A common stock, resulting in a total of 138,205,943 shares of Class A common stock outstanding (which reflects the sum of (x) 127,215,411 shares of Class A common stock outstanding as of May 4, 2026, (y) 375,378 shares of Class A common stock issuable on conversion of the Reporting Person's Class V-1 common stsock, and (z) 10,615,154 shares of Class A common stock issuable on conversion of the Reporting Person's V-3 common stock). Based on the total of 602,706,815 shares of the Issuer's common stock outstanding as of May 4, 2026 (including (i) 127,215,411 shares of Class A common stock, (ii) 71,932,208 shares of Class V-1 common stock, and (iii) 403,559,196 shares of Class V-3 common stock), the Reporting Person beneficially owns 1.8% of the Issuer's total outstanding Class A common stock on a fully diluted basis as of May 4, 2026.


SCHEDULE 13D






SCHEDULE 13D


 
David A. Ladensohn
 
Signature:/s/ David A. Ladensohn
Name/Title:David A. Landensohn, Individually
Date:05/19/2026
 
The RBC Millennium Trust
 
Signature:/s/ David A. Landensohn
Name/Title:David A. Ladensohn / Trustee
Date:05/19/2026
 
The Tilia Mill Trust
 
Signature:/s/ David A. Ladensohn
Name/Title:David A. Ladensohn / Trustee
Date:05/19/2026
 
The Serenade QSST Trust
 
Signature:/s/ David A. Ladensohn
Name/Title:David A. Ladensohn / Trustee
Date:05/19/2026
 
The 2014 QSST F/B/O Perry Cohen
 
Signature:/s/ David A. Ladensohn
Name/Title:David A. Ladensohn / Trustee
Date:05/19/2026