Sionna Therapeutics, Inc.
15.20%
6,684,962
2036042
829401108
Feb 9, 2025
Feb 18, 2025, 08:56 PM
Reporting Persons (3)
This is a joint filing. The reported shares may overlap between reporting persons and should not be summed.
| Name | Type | % of Class | Aggregate | Sole Voting | Shared Voting |
|---|---|---|---|---|---|
| TPG GP A, LLC | Other | 15.20% | 6,684,962 | 0 | 6,684,962 |
| James G. Coulter | Individual | 15.20% | 6,684,962 | 0 | 6,684,962 |
| Jon Winkelried | Individual | 15.20% | 6,684,962 | 0 | 6,684,962 |
Disclosure Items (7)
Common Stock, par value $0.001 per share
Sionna Therapeutics, Inc.
21 Hickory Drive, Suite 500, Waltham, MA, 02451
This Schedule 13D is being filed jointly on behalf of TPG GP A, LLC, a Delaware limited liability company ("TPG GP A"), James G. Coulter and Jon Winkelried (each a "Reporting Person" and collectively, the "Reporting Persons"). TPG GP A is the managing member of each of (i) TPG Group Holdings (SBS) Advisors, LLC, a Delaware limited liability company, which is the general partner of TPG Group Holdings (SBS), L.P., a Delaware limited partnership, and (ii) Alabama Investments (Parallel) GP, LLC, a Delaware limited liability company, which is the general partner of each of (a) Alabama Investments (Parallel), LP, a Delaware limited partnership, (b) Alabama Investments (Parallel) Founder A, LP, a Delaware limited partnership, and (c) Alabama Investments (Parallel) Founder G, LP, a Delaware limited partnership, which, collectively with TPG Group Holdings (SBS), L.P., Alabama Investments (Parallel), LP and Alabama Investments (Parallel) Founder A, LP, holds 100% of the shares of Class B common stock (which represents a majority of the combined voting power of the common stock) of TPG Inc., a Delaware corporation ("TPG"), which is the managing member of TPG GPCo, LLC, a Delaware limited liability company, which is the sole member of TPG Holdings II-A, LLC, a Delaware limited liability company, which is the general partner of TPG Operating Group II, L.P., a Delaware limited partnership, which is the sole member of TPG Holdings I-A, LLC, a Delaware limited liability company, which is the general partner of TPG Operating Group I, L.P, a Delaware limited partnership, which is the sole member of The Rise Fund GenPar Advisors, LLC, a Delaware limited liability company, which is the general partner of The Rise Fund GenPar, L.P., a Delaware limited partnership, which is the managing member of The Rise Fund SPV GP, LLC, a Delaware limited liability company, which is the general partner of each of (i) The Rise Fund Sling, L.P., a Delaware limited partnership, which directly holds 5,476,598 shares of Common Stock, and (ii) The Rise Fund Sling II, L.P., a Delaware limited partnership (together with The Rise Fund Sling, L.P., the "TPG Funds"), which directly holds 1,208,364 shares of Common Stock. Because of the relationship of TPG GP A to the TPG Funds, TPG GP A may be deemed to beneficially own the shares of Common Stock held by the TPG Funds. TPG GP A is controlled by entities owned by Messrs. Coulter and Winkelried. Because of the relationship of Messrs. Coulter and Winkelried to TPG GP A, each of Messrs. Coulter and Winkelried may be deemed to beneficially own the shares of Common Stock held by the TPG Funds. Messrs. Coulter and Winkelried disclaim beneficial ownership of the shares of Common Stock held by the TPG Funds except to the extent of their pecuniary interest therein. The agreement among the Reporting Persons relating to the joint filing of this Schedule 13D is attached as Exhibit 1 hereto.
The business address of each Reporting Person is c/o TPG Inc., 301 Commerce Street, Suite 3300, Fort Worth, Texas 76102. The following list includes the name, residence or business address and present principal occupation or employment of each director, executive officer and controlling person of TPG GP A (the "TPG GP A Officers"). All addresses are c/o TPG Inc., 301 Commerce Street, Suite 3300, Fort Worth, Texas 76102. James G. Coulter (Executive Chairman) Jon Winkelried (Chief Executive Officer) Jack Weingart (Chief Financial Officer) Todd Sisitsky (President) Anilu Vazquez-Ubarri (Chief Operating Officer) Bradford Berenson (General Counsel) Joann Harris (Chief Compliance Officer) Martin Davidson (Chief Accounting Officer) Steven A. Willmann (Treasurer) Jordan Kolar (Vice President)
The principal business of TPG GP A is serving as the sole ultimate general partner, managing member or similar entity of related entities engaged in making or recommending investments in securities of public and private companies. The present principal occupation of Mr. Coulter is Executive Chairman and Director of TPG and officer, director and/or manager of other affiliated entities. The present principal occupation of Mr. Winkelried is Chief Executive Officer and Director of TPG and officer, director and/or manager of other affiliated entities. See response to Item 2(b) above.
During the last five years, none of the Reporting Persons nor, to the knowledge of the Reporting Persons, without independent verification, any of the TPG GP A Officers was a party to a civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws.
Each of Messrs. Coulter, Winkelried and the TPG GP A Officers is a United States citizen.
The information set forth in or incorporated by reference in Items 2, 4, 5 and 6 of this Schedule 13D is incorporated by reference in its entirety into this Item 3.
The information contained in rows 7, 8, 9, 10, 11 and 13 on each of the cover pages of this Schedule 13D and the information set forth or incorporated in Items 2, 3, 4 and 6 is incorporated by reference in its entirety into this Item 5. The following sentence is based on 44,108,934 shares of Common Stock outstanding as of the Closing of the Offering, as reported in the Prospectus filed by the Issuer with the Securities Commission on February 7, 2025. Pursuant to Rule 13d-3 under the Act, the Reporting Persons may be deemed to beneficially own 6,684,962 shares of Common Stock, which constitutes approximately 15.2% of the outstanding shares of Common Stock.
See response to Item 5(a) above.
Except as set forth in this Item 5, none of the Reporting Persons nor, to the best knowledge of the Reporting Persons, without independent verification, any person named in Item 2 hereof, has effected any transaction in the shares of Common Stock during the past 60 days.
To the best knowledge of the Reporting Persons, no person other than the Reporting Persons has the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the securities beneficially owned by the Reporting Persons identified in this Item 5.
Not applicable.
The information set forth in Items 2, 3, 4 and 5 of this Schedule 13D is incorporated by reference in its entirety into this Item 6. Except as described above, to the knowledge of the Reporting Persons, there are no contracts, arrangements, understandings or relationships (legal or otherwise), including, but not limited to, the transfer or voting of any of the securities, finder's fees, joint ventures, loan or option arrangements, puts or calls, guarantees of profits, division of profits or loss, or the giving or withholding of proxies, among the persons named in Item 2 or between such persons and any other person, with respect to any securities of Issuer, including, but not limited to, any securities pledged or otherwise subject to a contingency the occurrence of which would give another person voting power or investment power over such securities.
1. Agreement of Joint Filing by TPG Group Holdings (SBS) Advisors, Inc., TPG GP A, LLC, TPG Advisors VII, Inc., TPG Advisors VI, Inc., TPG Advisors VI-AIV, Inc., TPG Asia Advisors VI, Inc., David Bonderman, James G. Coulter, Jon Winkelried and Karl Peterson dated as of January 18, 2022 (incorporated herein by reference to Exhibit 1 to Amendment No. 4 to Schedule 13D filed by TPG GP A, LLC, David Bonderman, James G. Coulter and Jon Winkelried on January 18, 2022 with respect to the shares of common stock of Allogene Therapeutics, Inc.). 2. Form of Lock-Up Agreement by and among certain stockholders and the directors and officers of the Issuer and the Underwriters (incorporated by reference to Annex II of Exhibit 1.1 to the Issuer's Registration Statement on Form S-1/A filed with the Commission on February 3, 2025). 3. Third Amended and Restated Investors' Rights Agreement, dated as of March 4, 2024, by and among the Issuer and certain stockholders (incorporated by reference to Exhibit 4.2 to the Issuer's Registration Statement on Form S-1/A filed with the Commission on February 3, 2025).