X0202 SCHEDULE 13D/A 0001606286 XXXXXXXX LIVE 3 Common stock, par value $0.001 per share 11/05/2026 false 0001834488 62878D100 N-able, Inc.

30 Corporate Drive Suite 400 Burlington MA 01803

Steven Schwab (312) 254-3300 110 N. Wacker Drive 32nd Floor Chicago IL 60606 0001606286 N Thoma Bravo Fund XI, L.P. a OO N DE 0 16333201 0 16333201 16333201 N 9.2 PN 0001606287 N Thoma Bravo Fund XI-A, L.P. a OO N DE 0 8202937 0 8202937 8202937 N 4.6 PN 0001606288 N Thoma Bravo Executive Fund XI, L.P. a OO N DE 0 360326 0 360326 360326 N 0.2 PN 0001666742 N Thoma Bravo Fund XII, L.P. a OO N DE 0 8079625 0 8079625 8079625 N 4.6 PN 0001666747 N Thoma Bravo Fund XII-A, L.P. a OO N DE 0 7145401 0 7145401 7145401 N 4.0 PN 0001666745 N Thoma Bravo Executive Fund XII, L.P. a OO N DE 0 79070 0 79070 79070 N 0.0 PN 0001680073 N Thoma Bravo Executive Fund XII-A, L.P. a OO N DE 0 70260 0 70260 70260 N 0.0 PN 0001634641 N Thoma Bravo Special Opportunities Fund II, L.P. a OO N DE 0 6610607 0 6610607 6610607 N 3.7 PN 0001634649 N Thoma Bravo Special Opportunities Fund II-A, L.P. a OO N DE 0 3209216 0 3209216 3209216 N 1.8 PN 0001722232 N Thoma Bravo Partners XI, L.P. a OO N DE 0 34716287 0 34716287 34716287 N 19.6 PN 0001756435 N Thoma Bravo Partners XII, L.P. a OO N DE 0 15374356 0 15374356 15374356 N 8.7 PN 0001813487 N Thoma Bravo UGP, LLC a OO N DE 0 50090643 0 50090643 50090643 N 28.3 OO Common stock, par value $0.001 per share N-able, Inc. 30 Corporate Drive Suite 400 Burlington MA 01803 This Amendment No. 3 amends and supplements the Schedule 13D filed with the Securities and Exchange Commission (the "SEC") on July 29, 2021 (the "Original Schedule 13D"), as amended by Amendment No. 1 filed with the SEC on December 20, 2021 ("Amendment No. 1") and Amendment No. 2 filed with the SEC on November 12, 2024 ("Amendment No. 2" and, together with the Original Schedule 13D and Amendment No. 1, the "Schedule 13D"). Except as set forth herein, the Schedule 13D is unmodified and remains in full force and effect. Each capitalized term used but not defined herein has the meaning ascribed to such term in the Original Schedule 13D. Item 4 of the Original Schedule 13D is hereby amended and supplemented as follows: The information set forth or incorporated by reference in Item 6 of this Schedule 13D is incorporated by reference in its entirety into this Item 4. Items 5(a) and 5(b) of the Original Schedule 13D are hereby amended and supplemented as follows: 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 Item 6 is incorporated by reference in its entirety into this Item 5. In the aggregate, the Reporting Persons beneficially own 50,090,643 shares of Common Stock, or 28.3% of the Common Stock outstanding. Calculations of beneficial ownership are based on 176,719,518 shares of Common Stock of the Issuer outstanding as of November 2, 2026, as reported in the Issuer's Quarterly Report on Form 10-Q filed with the SEC on November 5, 2026, and this statement is being filed to reflect a change in beneficial ownership resulting solely from the change in the Issuer's outstanding shares. Certain of the Reporting Persons and certain affiliates of Silver Lake Group, L.L.C. ("Silver Lake") (collectively, the "Stockholders") are parties to the Stockholders' Agreement described in Item 6 of the Original Schedule 13D (the "Stockholders' Agreement"), which contains, among other things, certain provisions relating to coordination of the voting of securities of the Issuer by the parties thereto. By virtue of the Stockholders' Agreement and the obligations and rights thereunder, the Reporting Persons acknowledge and agree that they are acting as a "group" with the other Stockholders within the meaning of Section 13(d) of the Securities Exchange Act of 1934, as amended (the "Exchange Act"). Based in part on information provided by or on behalf of the other Stockholders, such a "group" would be deemed to beneficially own an aggregate of 111,564,512 shares of Common Stock, or 63.1% of the total number of shares outstanding. The Reporting Persons expressly disclaim beneficial ownership over any shares of Common Stock that they may be deemed to beneficially own solely by reason of the Stockholders' Agreement. Pursuant to Rule 13d-4 of the Act, the Reporting Persons expressly declare that the filing of this statement shall not be construed as an admission that any such person is, for the purposes of Section 13(d) and/or Section 13(g) of the Act or otherwise, the beneficial owner of any securities covered by this statement held by any other person. The Reporting Persons expressly disclaim that they have agreed to act as a group other than as described in this Schedule 13D. By virtue of the relationship among the Reporting Persons described in Item 2, each such Reporting Person may be deemed to share the power to vote or direct the vote and to share the power to dispose of or direct the disposition of the 50,090,643 shares of Common Stock as set forth in rows 7, 8, 9, 10, 11 and 13 of each of the cover pages of this Schedule 13D. None of the Reporting Persons has effected any transactions in the Common Stock during the past 60 days. Exhibit 1 - Agreement of Joint Filing as required by Rule 13d-1(k)(1) under the Act (incorporated herein by reference to Exhibit 1 of the Schedule 13D filed by the Reporting Persons on July 29, 2021). Thoma Bravo Fund XI, L.P. /s/ Seth Boro 11/09/2026 Thoma Bravo Fund XI-A, L.P. /s/ Seth Boro 11/09/2026 Thoma Bravo Executive Fund XI, L.P. /s/ Seth Boro 11/09/2026 Thoma Bravo Fund XII, L.P. /s/ Seth Boro 11/09/2026 Thoma Bravo Fund XII-A, L.P. /s/ Seth Boro 11/09/2026 Thoma Bravo Executive Fund XII, L.P. /s/ Seth Boro 11/09/2026 Thoma Bravo Executive Fund XII-A, L.P. /s/ Seth Boro 11/09/2026 Thoma Bravo Special Opportunities Fund II, L.P. /s/ Seth Boro 11/09/2026 Thoma Bravo Special Opportunities Fund II-A, L.P. /s/ Seth Boro 11/09/2026 Thoma Bravo Partners XI, L.P. /s/ Seth Boro 11/09/2026 Thoma Bravo Partners XII, L.P. /s/ Seth Boro 11/09/2026 Thoma Bravo UGP, LLC /s/ Seth Boro 11/09/2026 Thoma Bravo Fund XI, L.P., Thoma Bravo Fund XI-A, L.P., Thoma Bravo Executive Fund XI, L.P., Thoma Bravo Special Opportunities Fund II, L.P. and Thoma Bravo Special Opportunities Fund II-A, L.P.: By: Thoma Bravo Partners XI, L.P., its General Partner; By: Thoma Bravo UGP XI, LLC, its General Partner; By: Thoma Bravo UGP, LLC, its Managing Member. Thoma Bravo Fund XII, L.P., Thoma Bravo Fund XII-A, L.P., Thoma Bravo Executive Fund XII, L.P. and Thoma Bravo Executive Fund XII-A, L.P.: By: Thoma Bravo Partners XII, L.P., its General Partner; By: Thoma Bravo UGP XII, LLC, its General Partner; By: Thoma Bravo UGP, LLC, its Managing Member. Thoma Bravo Partners XI, L.P.: By: Thoma Bravo UGP XI, LLC, its General Partner; By: Thoma Bravo UGP, LLC, its Managing Member. Thoma Bravo Partners XII, L.P.: By: Thoma Bravo UGP XII, LLC, its General Partner; By: Thoma Bravo UGP, LLC, its Managing Member.