X0407 4 2023-05-12 1 0001494650 OptiNose, Inc. OPTN 0001555276 Avista Capital Partners II GP, LLC C/O AVISTA CAPITAL HOLDINGS, L.P. 65 E. 55TH STREET, 18TH FLOOR NEW YORK NY 10022 0 0 1 0 0001441974 Avista Capital Partners II, L.P. 65 EAST 55TH STREET 18TH FLOOR NEW YORK NY 10022 0 0 1 0 0001441976 Avista Capital Partners (Offshore) II, L.P. 65 EAST 55TH STREET 18TH FLOOR NEW YORK NY 10022 0 0 1 0 0001555140 Avista Capital Partners (Offshore) II-A, LP 65 EAST 55TH STREET 18TH FLOOR NEW YORK NY 10022 0 0 1 0 0 Common Stock 2023-05-12 4 J 0 10102707 D 33667 I See footnote Common Stock 2023-05-12 4 J 0 3328648 D 0 I See footnote Common Stock 2023-05-12 4 J 0 807995 D 0 I See footnote Common Stock 2023-05-12 4 J 0 48370 A 48370 I See footnote Represents a pro rata in-kind distribution of shares of Common Stock of the Issuer to partners for no consideration and includes subsequent distributions by the general partner to its members. Represents shares of the Issuer held by Avista Capital Partners II, L.P. ("ACP II"). Avista Capital Partners II GP, LLC ("ACP II GP") is the general partner of ACP II. By virtue of this relationship, ACP II GP may be deemed to share beneficial ownership of the shares of common stock held by ACP II. Each of ACP II GP and ACP II expressly disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein. Represents shares of the Issuer held by Avista Capital Partners (Offshore) II, L.P. ("ACP Offshore II"). ACP II GP is the general partner of ACP Offshore II. By virtue of this relationship, ACP II GP may be deemed to share beneficial ownership of the shares of common stock held by ACP Offshore II. Each of ACP II GP and ACP Offshore II expressly disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein. Represents shares of the Issuer held by Avista Capital Partners (Offshore) II-A, L.P. ("ACP Offshore II-A"). ACP II GP is the general partner of ACP Offshore II-A. By virtue of this relationship, ACP II GP may be deemed to share beneficial ownership of the shares of common stock held by ACP Offshore II-A. Each of ACP II GP and ACP Offshore II-A expressly disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein. Represents shares off the Issuer received by ACP II GP in the pro rata in-kind distribution referred to in footnote 1 above. ACP II GP expressly disclaims beneficial ownership of such securities, except to the extent of its pecuniary interest therein. Avista Capital Partners II GP, LLC, By: /s/ Ben Silbert 2023-05-12 Avista Capital Partners II, L.P., By: Avista Capital Partners II GP, LLC, its General Partner, By: /s/ Ben Silbert 2023-05-12 Avista Capital Partners (Offshore) II, L.P., By: Avista Capital Partners II GP, LLC, its General Partner, By: /s/ Ben Silbert 2023-05-12 Avista Capital Partners (Offshore) II-A, L.P., By: Avista Capital Partners II GP, LLC, its General Partner, By: /s/ Ben Silbert 2023-05-12