X0306 4 2020-09-17 0001484612 Outset Medical, Inc. OM 0001162870 WARBURG PINCUS LLC C/O WARBURG PINCUS LLC 450 LEXINGTON AVENUE NEW YORK NY 10017 true true Common Stock 2020-09-17 4 C 0 198238 A 278111 I See footnotes Common Stock 2020-09-17 4 C 0 6196571 A 8693251 I See footnotes Series A Redeemable Convertible Preferred Stock 2020-09-17 4 C 0 1235350 0 D Common Stock 117283 0 I See footnotes Series A Redeemable Convertible Preferred Stock 2020-09-17 4 C 0 38614650 0 D Common Stock 3666039 0 I See footnotes Series B Redeemable Convertible Preferred Stock 2020-09-17 4 C 0 365041 0 D Common Stock 41587 0 I See footnotes Series B Redeemable Convertible Preferred Stock 2020-09-17 4 C 0 11410489 0 D Common Stock 1299946 0 I See footnotes Series C Redeemable Convertible Preferred Stock 2020-09-17 4 C 0 179433 0 D Common Stock 22713 0 I See footnotes Series C Redeemable Convertible Preferred Stock 2020-09-17 4 C 0 5608720 0 D Common Stock 709965 0 I See footnotes Series D Redeemable Convertible Preferred Stock 2020-09-17 4 C 0 99678 0 D Common Stock 16655 0 I See footnotes Series D Redeemable Convertible Preferred Stock 2020-09-17 4 C 0 3115757 0 D Common Stock 520621 0 I See footnotes These securities are held directly by Warburg Pincus X Partners, L.P., a Delaware limited partnership ("WP X Partners"). These securities are held directly by WP X Finance, L.P., a Delaware limited partnership ("WP X Finance", and together with WP X Partners, the "WPP Funds"). WPX GP, L.P., a Delaware limited partnership ("WPX GP"), is the managing general partner of WP X Finance. Warburg Pincus Private Equity X, L.P., a Delaware limited partnership ("WP X"), is the general partner of WPX GP. Warburg Pincus X, L.P., a Delaware limited partnership ("WP X LP"), is the general partner of WP X and WP X Partners. Warburg Pincus X GP L.P., a Delaware limited partnership ("WP X GP"), is the general partner of WP X LP. WPP GP LLC, a Delaware limited liability company ("WPP GP"), is the general partner of WP X GP. Warburg Pincus Partners, L.P., a Delaware limited partnership ("WP Partners"), is the managing member of WPP GP. Warburg Pincus Partners GP LLC, a Delaware limited liability company ("WP Partners GP"), is the general partner of WP Partners. Warburg Pincus & Co., a New York general partnership ("WP"), is the managing member of WP Partners GP. Warburg Pincus LLC, a New York limited liability company ("WP LLC"), is the manager of the WPP Funds. Each of the WPP Funds, WPX GP, WP X, WP X LP, WP X GP, WPP GP, WP Partners, WP Partners GP, WP and WP LLC are collectively referred to herein as the "Warburg Pincus Entities." Each of the Warburg Pincus Entities is a director-by-deputization solely for purposes of Section 16 of the Exchange Act. The Series A redeemable convertible preferred stock automatically converted into Common Stock upon the closing of the IPO. Each share of Series A redeemable convertible preferred stock converted into approximately 0.0949 Shares. These shares had no expiration date. The Series B redeemable convertible preferred stock automatically converted into Common Stock upon the closing of the IPO. Each share of Series B redeemable convertible preferred stock converted into approximately 0.1139 Shares. These shares had no expiration date. The Series C redeemable convertible preferred stock automatically converted into Common Stock upon the closing of the IPO. Each share of Series C redeemable convertible preferred stock converted into approximately 0.1266 Shares. These shares had no expiration date. The Series D redeemable convertible preferred stock automatically converted into Common Stock upon the closing of the IPO. Each share of Series D redeemable convertible preferred stock converted into approximately 0.1671 Shares. These shares had no expiration date. Due to the limitations of the SEC EDGAR filing system, the WPP Funds, WPX GP, WP X, WP X LP, WP X GP, WPP GP, WP Partners, WP Partners GP, and WP are filing a separate Form 4 from WP LLC. WARBURG PINCUS LLC By: /s/ Robert B. Knauss Name: Robert B. Knauss Title: Managing Director 2020-09-17