Williamson Steven S.

SEC source: 0001415889-25-023574 · form4-09032025_090900.xml · nonDerivative · entry 2

Williamson Steven S. · CIK 0001478582 · Director · PRESIDENT AND CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 358,967

F3 · kind: These shares were sold by the reporting person to cover tax withholding obligations in connection with the vesting of the RSUs granted on March 3, 2025.

SEC source: 0001415889-25-023574 · form4-09032025_090900.xml · nonDerivative · entry 1

Williamson Steven S. · CIK 0001478582 · Director · PRESIDENT AND CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 363,497

F1 · kind: These shares were sold by the reporting person to cover tax withholding obligations in connection with the vesting of the Restricted Stock Units (the "RSUs") granted on March 15, 2024.

F2 · balance_after: Includes 2,500 shares acquired by the Reporting Person under the Issuer's 2020 Employee Stock Purchase Plan on August 15, 2025.

SEC source: 0001415889-25-015650 · form4-06042025_100642.xml · nonDerivative · entry 2

Williamson Steven S. · CIK 0001478582 · Director · PRESIDENT AND CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 366,115

F2 · kind: These shares were sold by the reporting person to cover tax withholding obligations in connection with the vesting of the RSUs granted on March 3, 2025.

SEC source: 0001415889-25-015650 · form4-06042025_100642.xml · nonDerivative · entry 1

Williamson Steven S. · CIK 0001478582 · Director · PRESIDENT AND CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 370,776

F1 · kind: These shares were sold by the reporting person to cover tax withholding obligations in connection with the vesting of the Restricted Stock Units (the "RSUs") granted on March 15, 2024.

SEC source: 0001415889-25-007042 · form4-03052025_110320.xml · derivative · entry 3

Williamson Steven S. · CIK 0001478582 · Director · PRESIDENT AND CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 128,395

Underlying: Common Stock · 128,395 shares

Expires 2035-03-02

F4 · derivative.exercise_date: The shares subject to the option vest in 48 equal monthly installments from the grant date on March 3, 2025.

SEC source: 0001415889-25-007042 · form4-03052025_110320.xml · nonDerivative · entry 2

Williamson Steven S. · CIK 0001478582 · Director · PRESIDENT AND CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 376,038

F3 · shares: Represents grant of RSUs payable solely in common stock of the Issuer that vest in equal quarterly installments over the four-year period from the grant date of March 3, 2025.

SEC source: 0001415889-25-007042 · form4-03052025_110320.xml · nonDerivative · entry 1

Williamson Steven S. · CIK 0001478582 · Director · PRESIDENT AND CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 194,342

F1 · kind: These shares were sold by the reporting person to cover tax withholding obligations in connection with the vesting of the Restricted Stock Units (the "RSUs") granted on March 15, 2024.

F2 · balance_after: Includes 2,500 shares acquired by the reporting person under the Issuer's 2020 Employee Stock Purchase Plan on February 21, 2025.

SEC source: 0001415889-24-022065 · form4-08222024_100814.xml · nonDerivative · entry 1

Williamson Steven S. · CIK 0001478582 · Director · PRESIDENT AND CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 219,531

F1 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $6.74 to $6.87, inclusive. The Reporting Person undertakes 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 purchased at each separate price within the range.

SEC source: 0001415889-24-008639 · form4-03192024_100303.xml · derivative · entry 2

Williamson Steven S. · CIK 0001478582 · Director · PRESIDENT AND CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 425,116

Underlying: Common Stock · 425,116 shares

Expires 2034-03-14

F2 · derivative.exercise_date: Twenty-five percent of the shares subject to the option vests on March 3, 2025, and the remainder vests in equal monthly installments over the subsequent three-year period.

SEC source: 0001415889-24-008639 · form4-03192024_100303.xml · nonDerivative · entry 1

Williamson Steven S. · CIK 0001478582 · Director · PRESIDENT AND CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 205,286

F1 · shares: Represents grant of Restricted Stock Units payable solely in common stock of the Issuer that vest in accordance with the following schedule: 25% vests on March 3, 2025, and the remainder of the award vests in equal quarterly installments over the subsequent three-year period.

SEC source: 0001484612-24-000032 · edgardoc.xml · nonDerivative · entry 1

Williamson Steven S. · CIK 0001478582 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 320,347

F1 · shares: Required number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of an aggregate of 7,677 shares of Common Stock underlying RSUs granted to the reporting person on January 26, 2022 and January 6, 2023. This sale was made to satisfy tax withholding obligations through a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

SEC source: 0001484612-24-000020 · edgardoc.xml · nonDerivative · entry 4

Williamson Steven S. · CIK 0001478582 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 322,847

F4 · shares: Required number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of PSUs on January 12, 2024 described in footnote (3) above. This sale was made to satisfy tax withholding obligations through a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

SEC source: 0001484612-24-000020 · edgardoc.xml · nonDerivative · entry 3

Williamson Steven S. · CIK 0001478582 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 323,843

F3 · shares: On January 26, 2022, the reporting person was granted performance-based restricted stock units ("PSUs") subject to the satisfaction of specified performance criteria as of December 31, 2023. The reported amount represents the number of PSUs earned by the reporting person on January 12, 2024, upon certification by the Compensation Committee of the Issuer's Board of Directors of the satisfaction of specified performance criteria. Each PSU represents a contingent right to receive one share of common stock. These PSUs vested 50% on January 12, 2024, and the remaining 50% shall vest on December 31, 2024, subject to the reporting person's continuous service through the vesting date.

SEC source: 0001484612-24-000020 · edgardoc.xml · nonDerivative · entry 2

Williamson Steven S. · CIK 0001478582 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 317,939

F2 · shares: Represents performance-based restricted stock units ("PSUs") granted to the reporting person on January 12, 2024, that vest over a three year period based on the Issuer's common stock achieving specified prices per share, if not earlier vested upon satisfaction of specified performance criteria, subject to the reporting person's continuous service through the applicable vesting date. Each PSU represents a contingent right to receive one share of common stock.

SEC source: 0001484612-24-000020 · edgardoc.xml · nonDerivative · entry 1

Williamson Steven S. · CIK 0001478582 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 217,939

F1 · shares: Represents restricted stock units ("RSU") granted to the reporting person on January 12, 2024. Each RSU represents a contingent right to receive one share of common stock. These RSUs shall vest 33.33% on January 12, 2025, and the remaining 66.67% shall vest in equal installments over the course of the following two years on a quarterly basis on each February 15th, May 15th, August 15th and November 15th, subject to the reporting person's continuous service through the applicable vesting date.

SEC source: 0001484612-24-000012 · edgardoc.xml · nonDerivative · entry 1

Williamson Steven S. · CIK 0001478582 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 105,939

F1 · shares: Required number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of 21,573 shares of Common Stock underlying RSUs granted to the reporting person on January 6, 2023. This sale was made to satisfy tax withholding obligations through a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

SEC source: 0001484612-23-000091 · edgardoc.xml · nonDerivative · entry 1

Williamson Steven S. · CIK 0001478582 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 112,994

F1 · shares: Required number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of 12,280 shares of Common Stock underlying RSUs granted to the reporting person on November 15, 2020 and January 26, 2022. This sale was made to satisfy tax withholding obligations through a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

F2 · balance_after: Includes 1 share of Common Stock acquired pursuant to the Outset Medical, Inc. 2020 Employee Stock Purchase Plan ("ESPP"), for the purchase period of March 1, 2023 to August 31, 2023. This transaction is exempt from Rule 16b-3(c).

SEC source: 0001484612-23-000073 · edgardoc.xml · nonDerivative · entry 1

Williamson Steven S. · CIK 0001478582 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 116,577

F1 · kind: Required number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of 2,279 shares of Common Stock underlying RSUs granted to the reporting person on January 26, 2022. This sale was made to satisfy tax withholding obligations through a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

F2 · price: The sale price of the reporting person's shares represents the weighted average price of all shares sold by a broker on August 16, 2023 on behalf of a group of employees of the Issuer to satisfy the payment of withholding tax liability of such employees.

SEC source: 0001484612-23-000036 · edgardoc.xml · nonDerivative · entry 1

Williamson Steven S. · CIK 0001478582 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 117,212

F1 · price: The sale price of the reporting person's shares represents the weighted average price of all shares sold by a broker on May 16, 2023 on behalf of a group of employees of the Issuer to satisfy the payment of withholding tax liability of such employees.

SEC source: 0001484612-23-000035 · edgardoc.xml · nonDerivative · entry 1

Williamson Steven S. · CIK 0001478582 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 117,893

F1 · balance_after: Includes 1,422 shares of Common Stock acquired pursuant to the Outset Medical, Inc. 2020 Employee Stock Purchase Plan ("ESPP"), for the purchase period of September 1, 2022 to February 28, 2023. This transaction is exempt from Section 16, pursuant to Rule 16b-3(c).

SEC source: 0001484612-23-000019 · edgardoc.xml · nonDerivative · entry 1

Williamson Steven S. · CIK 0001478582 · Chief Commercial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 126,471

F1 · kind: Required number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of 2,280 shares of Common Stock underlying RSUs granted to the reporting person on January 26, 2022. This sale was made to satisfy tax withholding obligations through a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

SEC source: 0001484612-23-000016 · edgardoc.xml · nonDerivative · entry 1

Williamson Steven S. · CIK 0001478582 · Chief Commercial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 127,165

F1 · kind: Required number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of 9,116 shares of Common Stock underlying RSUs granted to the reporting person on January 26, 2022. This sale was made to satisfy tax withholding obligations through a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

SEC source: 0001484612-23-000004 · edgardoc.xml · nonDerivative · entry 2

Williamson Steven S. · CIK 0001478582 · Chief Commercial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 130,188

F2 · shares: Represents portion of stock units granted to the reporting person on January 6, 2023 that will vest on December 31, 2025, subject only to the reporting person's continuous service through the vesting date. Each stock unit represents a contingent right to receive one share of common stock.

SEC source: 0001484612-23-000004 · edgardoc.xml · nonDerivative · entry 1

Williamson Steven S. · CIK 0001478582 · Chief Commercial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 126,547

F1 · shares: Represents restricted stock units ("RSU") granted to the reporting person on January 6, 2023. Each RSU represents a contingent right to receive one share of common stock. These RSUs shall vest 33.33% on January 6, 2024, and the remaining 66.67% shall vest in equal installments over the course of the following two years on a quarterly basis on each February 15th, May 15th, August 15th and November 15th, subject to the reporting person's continuous service through the applicable vesting date.

SEC source: 0001484612-22-000076 · edgardoc.xml · nonDerivative · entry 1

Williamson Steven S. · CIK 0001478582 · Chief Commercial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 61,823

F1 · shares: Required number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of 10,000 shares of Common Stock underlying RSUs granted to the reporting person on November 15, 2020. This sale was made to satisfy tax withholding obligations through a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

F2 · balance_after: Includes 500 shares of Common Stock acquired pursuant to the Outset Medical, Inc. 2020 Employee Stock Purchase Plan ("ESPP"), for the purchase period of September 1, 2021 to February 28, 2022. This transaction is exempt from Rule 16b-3(c).

SEC source: 0001484612-22-000015 · edgardoc.xml · nonDerivative · entry 2

Williamson Steven S. · CIK 0001478582 · Chief Commercial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 64,745

F2 · shares: Represents portion of stock units granted to the reporting person on January 26, 2022 that will vest on December 31, 2024, subject only to the reporting person's continuous service through the vesting date. Each stock unit represents a contingent right to receive one share of common stock.

SEC source: 0001484612-22-000015 · edgardoc.xml · nonDerivative · entry 1

Williamson Steven S. · CIK 0001478582 · Chief Commercial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 63,207

F1 · shares: Represents restricted stock units ("RSU") granted to the reporting person on January 26, 2022. Each RSU represents a contingent right to receive one share of common stock. These RSUs shall vest 33.33% on January 26, 2023, and the remaining 66.67% shall vest in equal installments over the course of the following two years on a quarterly basis on each February 15th, May 15th, August 15th and November 15th, subject to the reporting person's continuous service through the applicable vesting date.

SEC source: 0001484612-22-000008 · edgardoc.xml · nonDerivative · entry 2

Williamson Steven S. · CIK 0001478582 · Chief Commercial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 35,857

F2 · shares: Required number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of the PSUs described above in footnote (1). This sale was made to satisfy tax withholding obligations through a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

SEC source: 0001484612-22-000008 · edgardoc.xml · nonDerivative · entry 1

Williamson Steven S. · CIK 0001478582 · Chief Commercial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 38,137

F1 · shares: Represents the number shares of Common Stock of the Issuer that vested in connection with performance stock units (PSUs) granted to the reporting person on March 15, 2021 upon confirmation by the Issuer's Compensation Committee of the Board of Directors on January 21, 2022 that the applicable performance criteria for calendar year 2021 had been met.

SEC source: 0001484612-21-000079 · edgardoc.xml · nonDerivative · entry 1

Williamson Steven S. · CIK 0001478582 · Chief Commercial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 28,932

F1 · shares: Required number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of 10,000 shares of Common Stock underlying RSUs granted to the reporting person on November 15, 2020. This sale was made to satisfy tax withholding obligations through a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

F2 · balance_after: Includes 489 shares acquired under the Outset Medical Inc. Employee Stock Purchase Plan on August 31, 2021.

SEC source: 0000905148-20-001217 · form4.xml · derivative · entry 2

Williamson Steven S. · CIK 0001478582 · Chief Commercial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 60,000

Underlying: Common Stock · 60,000 shares

Expires 2030-11-14

F2 · derivative.exercise_date: 25% of the total number of shares subject to the option shall vest on the first anniversary of the grant date, and thereafter 1/48 of such total number of shares shall vest on each monthly anniversary of the grant date, subject to the reporting person's continuous service through the applicable vesting date.

SEC source: 0000905148-20-001217 · form4.xml · nonDerivative · entry 1

Williamson Steven S. · CIK 0001478582 · Chief Commercial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 30,910

F1 · shares: Represents restricted stock units ("RSU") granted to the reporting person on November 5, 2020. Each RSU represents a contingent right to receive one share of common stock. One-third of these RSUs shall vest on each of the first, second and third anniversaries of the grant date, subject to the reporting person's continuous service through the applicable vesting date.