13D Filing: Abdiel Qualified Master Fund LP and MINDBODY Inc (MB)

---

CUSIP No. 60255W105

SCHEDULE 13D

This Amendment No. 12
(Amendment No. 12) amends and supplements the Schedule 13D filed on December 4, 2015 (the Original Schedule 13D) as amended by Amendment No. 1 thereto on February 10, 2016 (Amendment
No. 1), Amendment No. 2 thereto on February 12, 2016 (Amendment No. 2), Amendment No. 3 thereto on February 17, 2016 (Amendment No. 3), Amendment No. 4 thereto on March 7, 2016 (Amendment
No. 4), Amendment No. 5 thereto on July 28, 2016 (Amendment No. 5), Amendment No. 6 thereto on August 8, 2016 (Amendment No. 6), Amendment No. 7 thereto on October 3, 2016 (Amendment
No. 7), Amendment No. 8 thereto on October 13, 2016 (Amendment No. 8), Amendment No. 9 thereto on October 27, 2016 (Amendment No. 9), Amendment No. 10 thereto on February 9, 2017
(Amendment No. 10) and Amendment No. 11 thereto on May 1, 2017 (Amendment No. 11 and, together with the Original Schedule 13D, Amendment No. 1, Amendment No. 2, Amendment No. 3, Amendment
No. 4, Amendment No. 5, Amendment No. 6, Amendment No. 7, Amendment No. 8, Amendment No. 9 and Amendment No. 10, the Schedule 13D), relating to the shares of Class A common stock, par value $0.000004
per share (the Common Stock), of MINDBODY, Inc. (the Issuer). This Amendment No. 12 is being filed to reflect a change in the Reporting Persons beneficial ownership percentages, resulting from an increase in the number
of shares of Common Stock outstanding upon the completion of an underwritten registered public offering of 4,400,000 shares of Common Stock by the Issuer. Each Item below amends and supplements the information disclosed under the corresponding Item
of the Schedule 13D. Except as specifically provided herein, this Amendment No. 12 does not modify any of the information previously reported in the Schedule 13D. Capitalized terms used but not defined in this Amendment No. 12 shall have
the same meanings herein as are ascribed to such terms in the Schedule 13D.

Item 5. Interest in Securities of the Issuer.

Item 5 of the Schedule 13D is hereby amended by amending and restating paragraphs (a) and (b) thereof as follows:

(a) The information requested by this paragraph is incorporated herein by reference to the information provided on the cover pages to this Amendment
No. 12.

(b) The information requested by this paragraph is incorporated herein by reference to the information provided on the cover pages to this
Amendment No. 12 and Item 2(c) of the Schedule 13D.

Item 5(c) of the Schedule 13D is hereby supplemented by adding the following:

(c) There have been no transactions in the Common Stock which were effected by any of the Reporting Persons since the filing of Amendment No. 11.

7