BL

SEC source: 0001209191-19-020275 · doc4.xml · nonDerivative · entry 2

Partin Mark · CIK 0001688366 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 30,201

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 24, 2018.

F3 · price: The sale price represents the weighted-average price of shares sold ranging from $46.50 to $47.10 per share. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.

F2 · balance_after: Represents balance of shares beneficially held as of the filing date.

SEC source: 0001209191-19-020275 · doc4.xml · nonDerivative · entry 1

Partin Mark · CIK 0001688366 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 46,663

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 24, 2018.

F2 · balance_after: Represents balance of shares beneficially held as of the filing date.

SEC source: 0001209191-19-020277 · doc4.xml · derivative · entry 4

PRAGER MORGAN KAROLE · CIK 0001183627 · Chief Legal and Administrative

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 100,000

Underlying: Common Stock · 19,692 shares

Expires 2025-05-29

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 25, 2018.

F5 · derivative.exercise_date: The shares subject to the option vest in 4 equal, annual installments beginning on the one year anniversary of May 30, 2015.

F2 · balance_after: Represents balance of shares beneficially held as of the date of filing.

SEC source: 0001209191-19-020277 · doc4.xml · nonDerivative · entry 3

PRAGER MORGAN KAROLE · CIK 0001183627 · Chief Legal and Administrative

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 12,320

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 25, 2018.

F4 · price: The sale price represents the weighted-average price of shares sold ranging from $47.60 to $47.83 per share. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.

F2 · balance_after: Represents balance of shares beneficially held as of the date of filing.

SEC source: 0001209191-19-020277 · doc4.xml · nonDerivative · entry 2

PRAGER MORGAN KAROLE · CIK 0001183627 · Chief Legal and Administrative

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,127

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 25, 2018.

F3 · price: The sale price represents the weighted-average price of shares sold ranging from $46.50 to $47.10 per share. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.

F2 · balance_after: Represents balance of shares beneficially held as of the date of filing.

SEC source: 0001209191-19-020277 · doc4.xml · nonDerivative · entry 1

PRAGER MORGAN KAROLE · CIK 0001183627 · Chief Legal and Administrative

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 32,012

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 25, 2018.

F2 · balance_after: Represents balance of shares beneficially held as of the date of filing.

SEC source: 0001209191-18-046502 · doc4.xml · derivative · entry 2

Ryan Owen · CIK 0001748906 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,874

Underlying: Common Stock · 2,874 shares

Expires 2028-08-09

F3 · derivative.exercise_date: 100% of the shares subject to the option will vest upon the earlier of August 10, 2019 or the day prior to the Issuer's next annual meeting of stockholders, subject to the Reporting Person's continued service through the applicable vesting date.

SEC source: 0001209191-18-046502 · doc4.xml · nonDerivative · entry 1

Ryan Owen · CIK 0001748906 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,299

F1 · kind: Represents an initial restricted stock unit ("RSU") award issued pursuant to the Issuer's Outside Director Compensation Policy.

F2 · shares: Each RSU represents a contingent right to receive one share of the Issuer's common stock upon settlement. 100% of the RSUs will vest upon the earlier of August 10, 2019 or the day prior to Issuer's next annual meeting of stockholders, subject to the Reporting Person's continued service through the applicable vesting date.

SEC source: 0001209191-18-046643 · doc4.xml · nonDerivative · entry 1

Tucker Therese · CIK 0001688365 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · Brian & Therese Tucker Living Trust

Disclosed balance after: 3,182,610

F1 · price: The sale price represents the weighted average price of the shares sold ranging from $47.43 to $48.17 per share. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.

SEC source: 0001209191-18-046640 · doc4.xml · derivative · entry 4

Partin Mark · CIK 0001688366 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 462,019

Underlying: Common Stock · 43,547 shares

Expires 2025-03-29

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 24, 2018.

F4 · derivative.exercise_date: The shares subject to the option vest in 4 equal, annual installments beginning on the one year anniversary of January 20, 2015.

SEC source: 0001209191-18-046640 · doc4.xml · nonDerivative · entry 3

Partin Mark · CIK 0001688366 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 27,272

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 24, 2018.

F3 · price: The sale price represents the weighted-average price of shares sold ranging from $47.82 to $48.16 per share. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.

SEC source: 0001209191-18-046640 · doc4.xml · nonDerivative · entry 2

Partin Mark · CIK 0001688366 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 38,711

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 24, 2018.

F2 · price: The sale price represents the weighted-average price of shares sold ranging from $46.82 to $47.81 per share. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.

SEC source: 0001209191-18-046640 · doc4.xml · nonDerivative · entry 1

Partin Mark · CIK 0001688366 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 70,819

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 24, 2018.

SEC source: 0001209191-18-046634 · doc4.xml · derivative · entry 4

PRAGER MORGAN KAROLE · CIK 0001183627 · Chief Legal and Administrative

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 119,692

Underlying: Common Stock · 35,628 shares

Expires 2025-05-29

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 25, 2018.

F4 · derivative.exercise_date: The shares subject to the option vest in 4 equal, annual installments beginning on the one year anniversary of May 30, 2015.

SEC source: 0001209191-18-046634 · doc4.xml · nonDerivative · entry 3

PRAGER MORGAN KAROLE · CIK 0001183627 · Chief Legal and Administrative

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,592

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 25, 2018.

F3 · price: The sale price represents the weighted-average price of shares sold ranging from $47.82 to $48.16 per share. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.

SEC source: 0001209191-18-046634 · doc4.xml · nonDerivative · entry 2

PRAGER MORGAN KAROLE · CIK 0001183627 · Chief Legal and Administrative

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 22,950

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 25, 2018.

F2 · price: The sale price represents the weighted-average price of shares sold ranging from $46.82 to $47.81 per share. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.

SEC source: 0001209191-18-046634 · doc4.xml · nonDerivative · entry 1

PRAGER MORGAN KAROLE · CIK 0001183627 · Chief Legal and Administrative

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 49,220

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 25, 2018.

SEC source: 0001209191-18-046444 · doc4.xml · derivative · entry 3

Partin Mark · CIK 0001688366 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 505,566

Underlying: Common Stock · 29,475 shares

Expires 2025-03-29

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 24, 2018.

F3 · derivative.exercise_date: The shares subject to the option vest in 4 equal, annual installments beginning on the one year anniversary of January 20, 2015.

SEC source: 0001209191-18-046444 · doc4.xml · nonDerivative · entry 2

Partin Mark · CIK 0001688366 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 27,272

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 24, 2018.

F2 · price: The sale price represents the weighted-average price of shares sold ranging from $48.60 to $49.00 per share. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.

SEC source: 0001209191-18-046444 · doc4.xml · nonDerivative · entry 1

Partin Mark · CIK 0001688366 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 56,747

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 24, 2018.

SEC source: 0001209191-18-046441 · doc4.xml · derivative · entry 3

PRAGER MORGAN KAROLE · CIK 0001183627 · Chief Legal and Administrative

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 155,320

Underlying: Common Stock · 24,115 shares

Expires 2025-05-29

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 25, 2018.

F3 · derivative.exercise_date: The shares subject to the option vest in 4 equal, annual installments beginning on the one year anniversary of May 30, 2015.

SEC source: 0001209191-18-046441 · doc4.xml · nonDerivative · entry 2

PRAGER MORGAN KAROLE · CIK 0001183627 · Chief Legal and Administrative

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,592

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 25, 2018.

F2 · price: The sale price represents the weighted-average price of shares sold ranging from $48.60 to $49.00 per share. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.

SEC source: 0001209191-18-046441 · doc4.xml · nonDerivative · entry 1

PRAGER MORGAN KAROLE · CIK 0001183627 · Chief Legal and Administrative

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 37,707

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 25, 2018.

SEC source: 0001209191-18-046293 · doc4.xml · derivative · entry 3

Partin Mark · CIK 0001688366 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 535,041

Underlying: Common Stock · 25,135 shares

Expires 2025-03-29

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 24, 2018.

F3 · derivative.exercise_date: The shares subject to the option vest in 4 equal, annual installments beginning on the one year anniversary of January 20, 2015.

SEC source: 0001209191-18-046293 · doc4.xml · nonDerivative · entry 2

Partin Mark · CIK 0001688366 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 27,272

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 24, 2018.

F2 · price: The sale price represents the weighted-average price of shares sold ranging from $48.45 to $49.14 per share. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.

SEC source: 0001209191-18-046293 · doc4.xml · nonDerivative · entry 1

Partin Mark · CIK 0001688366 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 52,407

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 24, 2018.

SEC source: 0001209191-18-046291 · doc4.xml · derivative · entry 3

PRAGER MORGAN KAROLE · CIK 0001183627 · Chief Legal and Administrative

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 179,435

Underlying: Common Stock · 20,565 shares

Expires 2025-05-29

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 25, 2018.

F3 · derivative.exercise_date: The shares subject to the option vest in 4 equal, annual installments beginning on the one year anniversary of May 30, 2015.

SEC source: 0001209191-18-046291 · doc4.xml · nonDerivative · entry 2

PRAGER MORGAN KAROLE · CIK 0001183627 · Chief Legal and Administrative

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,592

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 25, 2018.

F2 · price: The sale price represents the weighted-average price of shares sold ranging from $48.45 to $49.14 per share. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.

SEC source: 0001209191-18-046291 · doc4.xml · nonDerivative · entry 1

PRAGER MORGAN KAROLE · CIK 0001183627 · Chief Legal and Administrative

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 34,157

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 25, 2018.

SEC source: 0000899243-18-019781 · doc4.xml · nonDerivative · entry 1

SLTA Sumeru (GP), L.L.C. · CIK 0001463527 · Director

Silver Lake Group, L.L.C. · CIK 0001418226 · Director

Silver Lake Technology Associates Sumeru, L.P. · CIK 0001463521 · Director

Silver Lake Sumeru Fund LP · CIK 0001410377 · Director

Silver Lake Technology Investors Sumeru, L.P. · CIK 0001463520 · Director

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · Held through Silver Lake Technology Associates Sumeru, L.P.

Disclosed balance after: 0

F1 · kind: Represents a distribution by Silver Lake Technology Associates Sumeru, L.P. ("SLT LP") of shares of Common Stock of BlackLine, Inc.'s (the "Issuer") to certain of its members as an in-kind distribution. The receipt of shares by each entity was exempt from reporting pursuant to Rule 16a-13 of the Securities Exchange Act of 1934, as amended (the "Exchange Act").

F1 · price: Represents a distribution by Silver Lake Technology Associates Sumeru, L.P. ("SLT LP") of shares of Common Stock of BlackLine, Inc.'s (the "Issuer") to certain of its members as an in-kind distribution. The receipt of shares by each entity was exempt from reporting pursuant to Rule 16a-13 of the Securities Exchange Act of 1934, as amended (the "Exchange Act").

F2 · ownership.nature: Each Reporting Person (as defined below) disclaims beneficial ownership of the securities reported herein, except to the extent of such Reporting Person's pecuniary interest therein, if any.

F3 · ownership.nature: Pursuant to Rule 16a-1(a)(4) under the Exchange Act, this filing shall not be deemed an admission that the Reporting Persons are, for purposes of Section 16 of the Exchange Act or otherwise, the beneficial owners of any equity securities in excess of their respective pecuniary interests.

F4 · ownership.nature: Silver Lake Group, L.L.C. ("SLG") is the managing member of SLTA Sumeru (GP), L.L.C. ("SLTA"), which is the general partner of SLT LP, which directly held these shares of Common Stock.

SEC source: 0001209191-18-039695 · doc4.xml · derivative · entry 4

Murphy Chris · CIK 0001688120 · Chief Revenue Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 345,000

Underlying: Common Stock · 15,000 shares

Expires 2024-03-02

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 14, 2018.

F4 · derivative.exercise_date: The option is fully vested and immediately exercisable.

SEC source: 0001209191-18-039695 · doc4.xml · nonDerivative · entry 3

Murphy Chris · CIK 0001688120 · Chief Revenue Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 18,872

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 14, 2018.

F3 · price: The sale price represents the weighted-average price of shares sold ranging from $45.25 to $46.17 per share. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.

SEC source: 0001209191-18-039695 · doc4.xml · nonDerivative · entry 2

Murphy Chris · CIK 0001688120 · Chief Revenue Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 20,854

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 14, 2018.

F2 · price: The sale price represents the weighted-average price of shares sold ranging from $44.25 to $45.23 per share. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.

SEC source: 0001209191-18-039695 · doc4.xml · nonDerivative · entry 1

Murphy Chris · CIK 0001688120 · Chief Revenue Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 33,872

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 14, 2018.

SEC source: 0001209191-18-038822 · doc4.xml · derivative · entry 4

Murphy Chris · CIK 0001688120 · Chief Revenue Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 360,000

Underlying: Common Stock · 15,000 shares

Expires 2024-03-02

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 14, 2018.

F4 · derivative.exercise_date: The option is fully vested and immediately exercisable.

SEC source: 0001209191-18-038822 · doc4.xml · nonDerivative · entry 3

Murphy Chris · CIK 0001688120 · Chief Revenue Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 18,872

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 14, 2018.

F3 · price: The sale price represents the weighted-average price of shares sold ranging from $49.64 to $49.73 per share. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.

SEC source: 0001209191-18-038822 · doc4.xml · nonDerivative · entry 2

Murphy Chris · CIK 0001688120 · Chief Revenue Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 19,272

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 14, 2018.

F2 · price: The sale price represents the weighted-average price of shares sold ranging from $48.64 to $49.58 per share. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.

SEC source: 0001209191-18-038822 · doc4.xml · nonDerivative · entry 1

Murphy Chris · CIK 0001688120 · Chief Revenue Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 33,872

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 14, 2018.

SEC source: 0001209191-18-037452 · doc4.xml · derivative · entry 3

Murphy Chris · CIK 0001688120 · Chief Revenue Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 375,000

Underlying: Common Stock · 15,000 shares

Expires 2024-03-02

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 14, 2018.

F3 · derivative.exercise_date: The option is fully vested and immediately exercisable.

SEC source: 0001209191-18-037452 · doc4.xml · nonDerivative · entry 2

Murphy Chris · CIK 0001688120 · Chief Revenue Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 18,872

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 14, 2018.

F2 · price: The sale price represents the weighted-average price of shares sold ranging from $43.70 to $44.25 per share. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.

SEC source: 0001209191-18-037452 · doc4.xml · nonDerivative · entry 1

Murphy Chris · CIK 0001688120 · Chief Revenue Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 33,872

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 14, 2018.

SEC source: 0001209191-18-036055 · doc4.xml · derivative · entry 3

Murphy Chris · CIK 0001688120 · Chief Revenue Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 390,000

Underlying: Common Stock · 15,000 shares

Expires 2024-03-02

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 14, 2018.

F3 · derivative.exercise_date: The option is fully vested and immediately exercisable.

SEC source: 0001209191-18-036055 · doc4.xml · nonDerivative · entry 2

Murphy Chris · CIK 0001688120 · Chief Revenue Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 18,872

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 14, 2018.

F2 · price: The sale price represents the weighted-average price of shares sold ranging from $42.63 to $43.28 per share. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.

SEC source: 0001209191-18-036055 · doc4.xml · nonDerivative · entry 1

Murphy Chris · CIK 0001688120 · Chief Revenue Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 33,872

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 14, 2018.

SEC source: 0001209191-18-034419 · doc4.xml · derivative · entry 3

Murphy Chris · CIK 0001688120 · Chief Revenue Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 405,000

Underlying: Common Stock · 15,000 shares

Expires 2024-03-02

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 14, 2018.

F3 · derivative.exercise_date: The option is fully vested and immediately exercisable.

SEC source: 0001209191-18-034419 · doc4.xml · nonDerivative · entry 2

Murphy Chris · CIK 0001688120 · Chief Revenue Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 18,872

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 14, 2018.

F2 · price: The sale price represents the weighted-average price of shares sold ranging from $39.90 to $40.35 per share. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.

SEC source: 0001209191-18-034419 · doc4.xml · nonDerivative · entry 1

Murphy Chris · CIK 0001688120 · Chief Revenue Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 33,872

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 14, 2018.

SEC source: 0000899243-18-014186 · doc4.xml · nonDerivative · entry 4

SLTA Sumeru (GP), L.L.C. · CIK 0001463527 · Director · 10% owner

Silver Lake Group, L.L.C. · CIK 0001418226 · Director · 10% owner

Silver Lake Technology Associates Sumeru, L.P. · CIK 0001463521 · Director · 10% owner

Silver Lake Sumeru Fund LP · CIK 0001410377 · Director · 10% owner

Silver Lake Technology Investors Sumeru, L.P. · CIK 0001463520 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · Held through Silver Lake Technology Associates Sumeru, L.P.

Disclosed balance after: 100,000

F8 · kind: Represents a distribution by SLSF of shares of Common Stock of the Issuer to its general partner, SLT LP. These shares are subject to a 45-day lock-up from the date of the underwritten secondary offering.

F8 · price: Represents a distribution by SLSF of shares of Common Stock of the Issuer to its general partner, SLT LP. These shares are subject to a 45-day lock-up from the date of the underwritten secondary offering.

F6 · ownership.nature: Each Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of such Reporting Person's pecuniary interest therein, if any.

F7 · ownership.nature: Pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, as amended (the "Exchange Act"), this filing shall not be deemed an admission that the Reporting Persons are, for purposes of Section 16 of the Exchange Act or otherwise, the beneficial owners of any equity securities in excess of their respective pecuniary interests.

F9 · ownership.nature: SLT LP directly holds these shares of Common Stock (the "SLT LP Shares"). As the general partner of SLT LP, SLTA may be deemed to share voting and dispositive power with respect to the SLT LP Shares. As the managing member of SLTA, SLG may be deemed to share voting and dispositive power with respect to the SLT LP Shares.

SEC source: 0000899243-18-014186 · doc4.xml · nonDerivative · entry 3

SLTA Sumeru (GP), L.L.C. · CIK 0001463527 · Director · 10% owner

Silver Lake Group, L.L.C. · CIK 0001418226 · Director · 10% owner

Silver Lake Technology Associates Sumeru, L.P. · CIK 0001463521 · Director · 10% owner

Silver Lake Sumeru Fund LP · CIK 0001410377 · Director · 10% owner

Silver Lake Technology Investors Sumeru, L.P. · CIK 0001463520 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · Held through Silver Lake Sumeru Fund, L.P.

Disclosed balance after: 3,948,612

F8 · kind: Represents a distribution by SLSF of shares of Common Stock of the Issuer to its general partner, SLT LP. These shares are subject to a 45-day lock-up from the date of the underwritten secondary offering.

F8 · price: Represents a distribution by SLSF of shares of Common Stock of the Issuer to its general partner, SLT LP. These shares are subject to a 45-day lock-up from the date of the underwritten secondary offering.

F3 · ownership.nature: Silver Lake Group, L.L.C. ("SLG") is the managing member of SLTA Sumeru (GP), L.L.C. ("SLTA"), which is the general partner of Silver Lake Technology Associates Sumeru, L.P. ("SLT LP"), which is the general partner of Silver Lake Sumeru Fund, L.P. ("SLSF"), which directly holds these shares of Common Stock.

F5 · ownership.nature: As the general partner of each of SLSF and SLTI, SLT LP may be deemed to share voting and dispositive power with respect to the Common Stock directly held by SLSF and SLTI (the "Silver Lake Sumeru Shares"). As the general partner of SLT LP, SLTA may be deemed to share voting and dispositive power with respect to the Silver Lake Sumeru Shares. As the managing member of SLTA, SLG may be deemed to share voting and dispositive power with respect to the Silver Lake Sumeru Shares.

F6 · ownership.nature: Each Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of such Reporting Person's pecuniary interest therein, if any.

F7 · ownership.nature: Pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, as amended (the "Exchange Act"), this filing shall not be deemed an admission that the Reporting Persons are, for purposes of Section 16 of the Exchange Act or otherwise, the beneficial owners of any equity securities in excess of their respective pecuniary interests.

SEC source: 0000899243-18-014186 · doc4.xml · nonDerivative · entry 2

SLTA Sumeru (GP), L.L.C. · CIK 0001463527 · Director · 10% owner

Silver Lake Group, L.L.C. · CIK 0001418226 · Director · 10% owner

Silver Lake Technology Associates Sumeru, L.P. · CIK 0001463521 · Director · 10% owner

Silver Lake Sumeru Fund LP · CIK 0001410377 · Director · 10% owner

Silver Lake Technology Investors Sumeru, L.P. · CIK 0001463520 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · Held through Silver Lake Technology Investors Sumeru, L.P.

Disclosed balance after: 35,261

F1 · shares: Represents shares of BlackLine, Inc.'s (the "Issuer") Common Stock sold in an underwritten secondary offering.

F2 · price: Represents the sale price to the underwriter in the secondary offering of $40.05 per share.

F4 · ownership.nature: SLG is the managing member of SLTA, which is the general partner of SLT LP, which is the general partner of Silver Lake Technology Investors Sumeru, L.P. ("SLTI", and collectively with SLG, SLTA, SLT LP and SLSF, the "Reporting Persons"), which directly holds these shares of Common Stock.

F5 · ownership.nature: As the general partner of each of SLSF and SLTI, SLT LP may be deemed to share voting and dispositive power with respect to the Common Stock directly held by SLSF and SLTI (the "Silver Lake Sumeru Shares"). As the general partner of SLT LP, SLTA may be deemed to share voting and dispositive power with respect to the Silver Lake Sumeru Shares. As the managing member of SLTA, SLG may be deemed to share voting and dispositive power with respect to the Silver Lake Sumeru Shares.

F6 · ownership.nature: Each Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of such Reporting Person's pecuniary interest therein, if any.

F7 · ownership.nature: Pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, as amended (the "Exchange Act"), this filing shall not be deemed an admission that the Reporting Persons are, for purposes of Section 16 of the Exchange Act or otherwise, the beneficial owners of any equity securities in excess of their respective pecuniary interests.