X0306 4 2019-03-06 1 0001314727 Sonos Inc SONO 0001466950 Index Ventures Growth I (Jersey) L.P. 5TH FLOOR, 44 ESPLANADE ST. HELIER Y9 JE1 3FG JERSEY 0 0 1 0 0001447961 Index Venture Growth Associates I Ltd 5TH FLOOR, 44 ESPLANADE ST. HELIER Y9 JE1 3FG JERSEY 0 0 1 0 0001466948 Index Ventures Growth I Parallel Entrepreneur Fund (Jersey) L.P. 5TH FLOOR, 44 ESPLANADE ST. HELIER Y9 JE1 3FG JERSEY 0 0 1 0 0001591294 Yucca (Jersey) SLP 44 ESPLANADE ST. HELIER Y9 JE4 9WG JERSEY 0 0 1 0 Common Stock 2019-03-06 4 J 0 1982750 D 7313231 D Common Stock 2019-03-07 4 S 0 198080 9.8298 D 730602 I See footnotes Common Stock 2019-03-07 4 S 0 10959 9.8298 D 40420 I See footnotes On March 6, 2019 Index Ventures Growth I (Jersey) L.P. ("Index I") distributed, for no consideration, an aggregate of 1,982,750 shares of common stock of the issuer to its limited partners and to Index Venture Growth Associates I Limited ("IVGA I"), the general partner of Index I, representing each such partner's pro rata interest in the shares held by Index I. The aforementioned distributions were made in accordance with the exemptions afforded by Rule 16a-13 and Rule 16a-9 of the Securities Exchange Act of 1934, as amended. The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $9.66 to $10.085. The reporting persons undertake to provide to the issuer, any security holder of the issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. The shares are held directly by Index Ventures Growth I Parallel Entrepreneur Fund (Jersey), L.P. ("Index I Parallel"). The shares are held directly by Yucca (Jersey) SLP ("Yucca"). Yucca is a co-investment vehicle that is contractually required to mirror the investment of Index I and Index I Parallel. IVGA I is the general partner of Index I, and Index I Parallel (together with Index I and Yucca, the "Index Funds"). IVGA I disclaims Section 16 beneficial ownership of the securities held by the Index Funds, except to the extent of its respective pecuniary interest therein, if any, and this report shall not be deemed an admission that IVGA I is the beneficial owner of such securities for Section 16 or any other purpose. INDEX VENTURE GROWTH ASSOCIATES I LIMITED, as Managing General Partner of INDEX VENTURES GROWTH I (JERSEY), L.P., By: /s/ Sinead Meehan, Its: Director 2019-03-07 INDEX VENTURE GROWTH ASSOCIATES I LIMITED, By: /s/ Sinead Meehan, Its: Director 2019-03-07 INDEX VENTURE GROWTH ASSOCIATES I LIMITED, as Managing General Partner of INDEX VENTURES GROWTH I PARALLEL ENTREPRENEUR FUND (JERSEY), L.P., By: /s/ Sinead Meehan, Its: Director 2019-03-07 YUCCA (JERSEY) SLP, By Intertrust Employee Benefit Services Limited, as authorized signatory of Yucca (Jersey) SLP in its capacity as Administrator of the Index Co-Investment Scheme, By: /s/ Sarah Earles, /s/ Andy Le Couilliard, Its Authorized Signatories 2019-03-07