ZNTL

SEC source: 0001725160-20-000040 · wf-form4_160635443646975.xml · nonDerivative · entry 4

SUN ANTHONY Y · CIK 0001377952 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,125,329

F1 · kind: The sale reported in the Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 22, 2020.

F4 · price: The price reported is a weighted average price. The shares were sold in multiple transactions at per share prices ranging from $45.42 to $46.41. The Reporting Person undertakes to provide upon request to the SEC staff, the Issuer, or any stockholder of the Issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001725160-20-000041 · wf-form4_160635447424149.xml · nonDerivative · entry 6

Bunker Kevin D. · CIK 0001807484 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 92,620

F3 · kind: The sale reported in the Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 21, 2020.

F6 · price: The price reported is a weighted average price. The shares were sold in multiple transactions at per share prices ranging from $47.51 to $47.695. The Reporting Person undertakes to provide upon request to the SEC staff, the Issuer, or any stockholder of the Issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F2 · ownership.nature: Represents shares nominally held by Sundog Ranch, Inc. on behalf of the Bunker Family Protection Trust, the sole shareholder of Sundog Ranch, Inc. The Reporting Person and his wife are the primary beneficiaries of the Bunker Family Protection Trust and the Reporting Person and his wife are also directors of Sundog Ranch, Inc. The Reporting Person disclaims beneficial ownership of the securities held by Sundog Ranch, Inc. except to the extent of his pecuniary interest therein, if any.

SEC source: 0001725160-20-000041 · wf-form4_160635447424149.xml · nonDerivative · entry 5

Bunker Kevin D. · CIK 0001807484 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 93,020

F3 · kind: The sale reported in the Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 21, 2020.

F5 · price: The price reported is a weighted average price. The shares were sold in multiple transactions at per share prices ranging from $46.47 to $47.20. The Reporting Person undertakes to provide upon request to the SEC staff, the Issuer, or any stockholder of the Issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F2 · ownership.nature: Represents shares nominally held by Sundog Ranch, Inc. on behalf of the Bunker Family Protection Trust, the sole shareholder of Sundog Ranch, Inc. The Reporting Person and his wife are the primary beneficiaries of the Bunker Family Protection Trust and the Reporting Person and his wife are also directors of Sundog Ranch, Inc. The Reporting Person disclaims beneficial ownership of the securities held by Sundog Ranch, Inc. except to the extent of his pecuniary interest therein, if any.

SEC source: 0001725160-20-000041 · wf-form4_160635447424149.xml · nonDerivative · entry 4

Bunker Kevin D. · CIK 0001807484 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 97,084

F3 · kind: The sale reported in the Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 21, 2020.

F4 · price: The price reported is a weighted average price. The shares were sold in multiple transactions at per share prices ranging from $45.47 to $46.46. The Reporting Person undertakes to provide upon request to the SEC staff, the Issuer, or any stockholder of the Issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F2 · ownership.nature: Represents shares nominally held by Sundog Ranch, Inc. on behalf of the Bunker Family Protection Trust, the sole shareholder of Sundog Ranch, Inc. The Reporting Person and his wife are the primary beneficiaries of the Bunker Family Protection Trust and the Reporting Person and his wife are also directors of Sundog Ranch, Inc. The Reporting Person disclaims beneficial ownership of the securities held by Sundog Ranch, Inc. except to the extent of his pecuniary interest therein, if any.

SEC source: 0001725160-20-000041 · wf-form4_160635447424149.xml · nonDerivative · entry 3

Bunker Kevin D. · CIK 0001807484 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 101,045

F2 · ownership.nature: Represents shares nominally held by Sundog Ranch, Inc. on behalf of the Bunker Family Protection Trust, the sole shareholder of Sundog Ranch, Inc. The Reporting Person and his wife are the primary beneficiaries of the Bunker Family Protection Trust and the Reporting Person and his wife are also directors of Sundog Ranch, Inc. The Reporting Person disclaims beneficial ownership of the securities held by Sundog Ranch, Inc. except to the extent of his pecuniary interest therein, if any.

SEC source: 0001725160-20-000041 · wf-form4_160635447424149.xml · nonDerivative · entry 2

Bunker Kevin D. · CIK 0001807484 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,076,937

SEC source: 0001725160-20-000042 · wf-form4_160635451002074.xml · nonDerivative · entry 3

Epperly Melissa B, · CIK 0001807359 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 294,446

F1 · kind: The sale reported in the Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 21, 2020.

F3 · price: The price reported is a weighted average price. The shares were sold in multiple transactions at per share prices ranging from $47.15 to $47.32. The Reporting Person undertakes to provide upon request to the SEC staff, the Issuer, or any stockholder of the Issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001725160-20-000042 · wf-form4_160635451002074.xml · nonDerivative · entry 2

Epperly Melissa B, · CIK 0001807359 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 294,746

F1 · kind: The sale reported in the Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 21, 2020.

F2 · price: The price reported is a weighted average price. The shares were sold in multiple transactions at per share prices ranging from $46.04 to $47.03. The Reporting Person undertakes to provide upon request to the SEC staff, the Issuer, or any stockholder of the Issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001725160-20-000039 · wf-form4_160635438045598.xml · nonDerivative · entry 2

Gallagher Cam · CIK 0001557832 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 626,931

F1 · kind: The sale reported in the Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 21, 2020.

F4 · price: The price reported is a weighted average price. The shares were sold in multiple transactions at per share prices ranging from $47.03 to $47.695. The Reporting Person undertakes to provide upon request to the SEC staff, the Issuer, or any stockholder of the Issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001725160-20-000039 · wf-form4_160635438045598.xml · nonDerivative · entry 1

Gallagher Cam · CIK 0001557832 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 628,096

F1 · kind: The sale reported in the Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 21, 2020.

F2 · price: The price reported is a weighted average price. The shares were sold in multiple transactions at per share prices ranging from $46.00 to $46.985. The Reporting Person undertakes to provide upon request to the SEC staff, the Issuer, or any stockholder of the Issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F3 · balance_after: Includes 147,788 shares of common stock received on October 28, 2020 in a pro-rata distribution in-kind that was exempt from reporting under Rule 16a-9.

SEC source: 0001725160-20-000040 · wf-form4_160635443646975.xml · nonDerivative · entry 3

SUN ANTHONY Y · CIK 0001377952 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,131,160

F1 · kind: The sale reported in the Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 22, 2020.

F3 · price: The price reported is a weighted average price. The shares were sold in multiple transactions at per share prices ranging from $47.01 to $47.65. The Reporting Person undertakes to provide upon request to the SEC staff, the Issuer, or any stockholder of the Issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001725160-20-000040 · wf-form4_160635443646975.xml · nonDerivative · entry 2

SUN ANTHONY Y · CIK 0001377952 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,132,872

F1 · kind: The sale reported in the Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 22, 2020.

F2 · price: The price reported is a weighted average price. The shares were sold in multiple transactions at per share prices ranging from $45.99 to $46.97. The Reporting Person undertakes to provide upon request to the SEC staff, the Issuer, or any stockholder of the Issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001725160-21-000008 · wf-form4_160998272301109.xml · nonDerivative · entry 2

SUN ANTHONY Y · CIK 0001377952 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 213,600

F1 · ownership.nature: Represents shares nominally held by Hao Bao Zi Trust LLC on behalf of the Hao Bao Zi Trust (the "Trust"), the sole member of Hao Bao Zi Trust LLC. The Reporting Person's spouse is the investment adviser with sole power to make investment decisions regarding the securities held by the Trust. The Reporting Person disclaims beneficial ownership of the securities held by Hao Bao Zi Trust LLC except to the extent of his pecuniary interest therein, if any.

SEC source: 0001725160-21-000008 · wf-form4_160998272301109.xml · nonDerivative · entry 1

SUN ANTHONY Y · CIK 0001377952 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,804,005

SEC source: 0001725160-20-000024 · wf-form4_160410197813004.xml · nonDerivative · entry 1

Recurium Equity, LLC · CIK 0001808095 · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,990

F1 · kind: Recurium Equity, LLC distributed these shares to its members on a pro rata basis, for no consideration.

SEC source: 0001725160-20-000020 · wf-form4_159900936053889.xml · derivative · entry 1

Pinto Alexis · CIK 0001819302 · Chief Legal Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 275,000

Underlying: Common Stock · 275,000 shares

Expires 2030-08-30

F1 · derivative.exercise_date: The options vest and become exercisable as to 25% of the total number of shares underlying the option on August 31, 2021 and as to the remaining 75% in 36 substantially equal monthly installments thereafter.

SEC source: 0000899243-20-018186 · doc4.xml · derivative · entry 1

Blackwell Kimberly · CIK 0001816465 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 42,000

Underlying: Common Stock · 42,000 shares

Expires 2030-06-30

F1 · derivative.exercise_date: The options vest and become exercisable in substantially equal monthly installments over the 36 months following the date of grant.

SEC source: 0001387131-20-003800 · ownership.xml · nonDerivative · entry 1

VIKING GLOBAL INVESTORS LP · CIK 0001103804 · 10% owner

Viking Global Opportunities Illiquid Investments Sub-Master LP · CIK 0001629482 · 10% owner

Viking Global Opportunities Portfolio GP LLC · CIK 0001629472 · 10% owner

Viking Global Opportunities GP LLC · CIK 0001629476 · 10% owner

HALVORSEN OLE ANDREAS · CIK 0001133006 · 10% owner

Ott David C. · CIK 0001621842 · 10% owner

Shabet Rose Sharon · CIK 0001711393 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 4,443,284

F1 · ownership.nature: Andreas Halvorsen, David C. Ott and Rose S. Shabet are Executive Committee members of certain management entities, including Viking Global Partners LLC, the general partner of Viking Global Investors LP ("VGI") and Viking Global Opportunities GP LLC ("Opportunities GP"), the sole owner of Viking Global Opportunities Portfolio GP LLC ("Opportunities Portfolio GP"). VGI provides managerial services to various investment funds, including Viking Global Opportunities Illiquid Investments Sub-Master LP ("Opportunities Fund"). Each of VGI, Opportunities GP, Opportunities Portfolio GP, VGOL, Opportunities Fund, Mr. Halvorsen, Mr. Ott and Ms. Shabet (collectively the "Reporting Persons") may be deemed to beneficially own the shares reported on this form.

F2 · ownership.nature: On April 7, 2020, Opportunities Fund acquired 750,000 shares of common stock of the Issuer ("Common Stock") at a price of $18 per share in connection with Zentalis Pharmaceutical, Inc.'s initial public offering. VGI provides managerial services to Opportunities Fund, which directly holds the 4,443,284 shares of Common Stock reported herein. Because of the relationship between VGI and VGOP, VGI may be deemed to beneficially own the shares of Common Stock held directly by Opportunities Fund.

F3 · ownership.nature: Opportunities Portfolio GP is the general partner of Opportunities Fund. Because of the relationship between Opportunities Portfolio GP and Opportunities Fund, Opportunities Portfolio GP may be deemed to beneficially own the shares of Common Stock held directly by Opportunities Fund. Opportunities GP is the sole owner of Opportunities Portfolio GP. Because of the relationship between Opportunities GP and Opportunities Portfolio GP, Opportunities GP may be deemed to beneficially own the shares of Common Stock held directly by Opportunities Fund.

F4 · ownership.nature: The Reporting Persons disclaim beneficial ownership of these securities except to the extent of their pecuniary interest therein, and the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of the reported securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or for any other purpose.

SEC source: 0000899243-20-010601 · doc4.xml · nonDerivative · entry 1

Bunker Kevin D. · CIK 0001807484 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 544,650

F1 · shares: Represents restricted stock units, each of which represent a contingent right to receive one share of common stock, and which will vest over a fifteen month period following the grant date.

SEC source: 0000899243-20-010605 · doc4.xml · nonDerivative · entry 1

Johnson David Michael · CIK 0001808098 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 110,648

F1 · shares: Represents restricted stock units, each of which represent a contingent right to receive one share of common stock, and which will vest over a twenty-four month period following the grant date.

SEC source: 0000899243-20-010607 · doc4.xml · nonDerivative · entry 1

Epperly Melissa B, · CIK 0001807359 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 277,529

F1 · shares: Represents restricted stock units, each of which represent a contingent right to receive one share of common stock, and which will vest over a twenty-four month period following the grant date.

SEC source: 0000899243-20-010606 · doc4.xml · nonDerivative · entry 1

SUN ANTHONY Y · CIK 0001377952 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,145,680

F1 · shares: Represents restricted stock units, each of which represent a contingent right to receive one share of common stock, and which will vest over a fifteen month period following the grant date.

SEC source: 0000899243-20-010604 · doc4.xml · nonDerivative · entry 1

Gallagher Cam · CIK 0001557832 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 489,143

F1 · shares: Represents restricted stock units, each of which represent a contingent right to receive one share of common stock, and which will vest over a fifteen month period following the grant date.

SEC source: 0001725160-20-000041 · wf-form4_160635447424149.xml · nonDerivative · entry 1

Bunker Kevin D. · CIK 0001807484 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,177,982

F1 · balance_after: Includes 632,982 shares of common stock received on October 28, 2020 in a pro-rata distribution in-kind that was exempt from reporting under Rule 16a-9.

SEC source: 0001725160-20-000042 · wf-form4_160635451002074.xml · nonDerivative · entry 1

Epperly Melissa B, · CIK 0001807359 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 297,529

SEC source: 0001725160-20-000040 · wf-form4_160635443646975.xml · nonDerivative · entry 1

SUN ANTHONY Y · CIK 0001377952 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,146,568

SEC source: 0001725160-20-000052 · wf-form4_160703623563271.xml · nonDerivative · entry 1

Johnson David Michael · CIK 0001808098 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 114,648